build: let infra containers builds fail individually

Signed-off-by: Jakob Borg <jakob@kastelo.net>

.github/ISSUE_TEMPLATE/01-feature.yml

@@ -1,6 +1,7 @@
 name: Feature request
 description: File a new feature request
 labels: ["enhancement", "needs-triage"]
+type: Feature
 body:
 
   - type: textarea

.github/ISSUE_TEMPLATE/02-bug.yml

@@ -1,6 +1,7 @@
 name: Bug report
 description: If you're actually looking for support instead, see "I need help / I have a question".
 labels: ["bug", "needs-triage"]
+type: Bug
 body:
   - type: markdown
     attributes:

.github/dependabot.yml

@@ -1,13 +1,28 @@
 version: 2
 updates:
+
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
       interval: monthly
-    open-pull-requests-limit: 10
+    cooldown:
+      default-days: 14
+    groups:
+      actions:
+        applies-to: version-updates
+        patterns:
+          - "*"
 
   - package-ecosystem: "gomod"
     directory: "/"
     schedule:
       interval: monthly
-    open-pull-requests-limit: 10
+    allow:
+      - dependency-type: direct
+    cooldown:
+      default-days: 14
+    groups:
+      dependencies:
+        applies-to: version-updates
+        patterns:
+          - "*"

.github/labeler.yml

@@ -0,0 +1,23 @@
+version: 1
+labels:
+
+- label: enhancement
+  title: ^feat\b
+
+- label: bug
+  title: ^fix\b
+
+- label: documentation
+  title: ^docs\b
+
+- label: chore
+  title: ^chore\b
+
+- label: chore
+  title: ^refactor\b
+
+- label: build
+  title: ^build\b
+
+- label: dependencies
+  title: ^build\(deps\)\b

.github/regsync.yml

@@ -0,0 +1,52 @@
+  version: 1
+  creds:
+    - registry: docker.io
+      user: "{{env \"DOCKERHUB_USERNAME\"}}"
+      pass: "{{env \"DOCKERHUB_TOKEN\"}}"
+
+  defaults:
+    ratelimit:
+      min: 100
+      retry: 1m
+    parallel: 4
+
+  sync:
+
+    - source: ghcr.io/syncthing/syncthing
+      target: docker.io/syncthing/syncthing
+      type: repository
+      tags:
+        allow:
+          - latest
+          - rc
+          - edge
+          - \d+
+          - \d+\.\d+
+          - \d+\.\d+\.\d+
+          - \d+\.\d+\.\d+-rc\.\d+
+
+    - source: ghcr.io/syncthing/relaysrv
+      target: docker.io/syncthing/relaysrv
+      type: repository
+      tags:
+        allow:
+          - latest
+          - rc
+          - edge
+          - \d+
+          - \d+\.\d+
+          - \d+\.\d+\.\d+
+          - \d+\.\d+\.\d+-rc\.\d+
+
+    - source: ghcr.io/syncthing/discosrv
+      target: docker.io/syncthing/discosrv
+      type: repository
+      tags:
+        allow:
+          - latest
+          - rc
+          - edge
+          - \d+
+          - \d+\.\d+
+          - \d+\.\d+\.\d+
+          - \d+\.\d+\.\d+-rc\.\d+

.github/release.yml

@@ -0,0 +1,17 @@
+changelog:
+  exclude:
+    labels:
+      - dependencies
+
+  categories:
+    - title: Fixes
+      labels:
+        - bug
+
+    - title: Features
+      labels:
+        - enhancement
+
+    - title: Other
+      labels:
+        - '*'

.github/workflows/build-infra-dockers.yaml

@@ -7,7 +7,7 @@ on:
       - infra-*
 
 env:
-  GO_VERSION: "~1.24.0"
+  GO_VERSION: "~1.26.0"
   CGO_ENABLED: "0"
   BUILD_USER: docker
   BUILD_HOST: github.syncthing.net
@@ -19,10 +19,10 @@ permissions:
 jobs:
   docker-syncthing:
     name: Build and push Docker images
-    if: github.repository == 'syncthing/syncthing'
+    if: github.repository_owner == 'syncthing'
     runs-on: ubuntu-latest
-    environment: release
     strategy:
+      fail-fast: false
       matrix:
         pkg:
           - stcrashreceiver
@@ -30,23 +30,23 @@ jobs:
           - stupgrades
           - ursrv
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: ${{ env.GO_VERSION }}
           check-latest: true
 
       - name: Login to Docker Hub
-        uses: docker/login-action@v3
+        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9 # v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Login to GHCR
-        uses: docker/login-action@v3
+        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9 # v3
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
@@ -59,8 +59,11 @@ jobs:
             mv ${{ matrix.pkg }} ${{ matrix.pkg }}-linux-"$arch"
           done
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@c7c53464625b32c7a7e944ae62b3e17d2b600130 # v3
+
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3
 
       - name: Set Docker tags (all branches)
         run: |
@@ -74,7 +77,7 @@ jobs:
           echo "TAGS=$tags" >> $GITHUB_ENV
 
       - name: Build and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@ca052bb54ab0790a636c9b5f226502c73d547a25 # v5
         with:
           context: .
           file: ./Dockerfile.${{ matrix.pkg }}

.github/workflows/build-nightly.yaml

@@ -1,18 +0,0 @@
-name: Build Syncthing (Nightly)
-
-on:
-  schedule:
-    # Run nightly build at 05:00 UTC
-    - cron: '00 05 * * *'
-  workflow_dispatch:
-
-permissions:
-  contents: write
-  packages: write
-
-jobs:
-  build-syncthing:
-    uses: ./.github/workflows/build-syncthing.yaml
-    # if we only want nightlies to run for specific users:
-    # if: contains(fromJSON('["syncthing", "calmh"]'), github.repository_owner)
-    secrets: inherit

.github/workflows/mirrors.yaml

@@ -0,0 +1,21 @@
+name: Mirrors
+
+on: [push, delete]
+
+permissions:
+  contents: read
+
+jobs:
+  codeberg:
+    name: Mirror to Codeberg
+    if: github.repository_owner == 'syncthing'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - uses: yesolutions/mirror-action@662fce0eced8996f64d7fa264d76cddd84827f33 # master
+        with:
+          REMOTE: ssh://git@codeberg.org/${{ github.repository }}.git
+          GIT_SSH_PRIVATE_KEY: ${{ secrets.CODEBERG_PUSH_KEY }}
+          GIT_SSH_NO_VERIFY_HOST: "true"

.github/workflows/org-members.yaml

@@ -0,0 +1,21 @@
+name: Org membership recommendations
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 0 1 * *'
+
+jobs:
+
+  run-recommendation:
+    name: Check for a recommendation
+    if: github.repository_owner == 'syncthing'
+    runs-on: ubuntu-latest
+    steps:
+
+      - uses: docker://ghcr.io/calmh/github-org-members:latest
+        env:
+          GITHUB_ORGANISATION: syncthing
+          GITHUB_TOKEN: ${{ secrets.GOM_GITHUB_TOKEN }}
+          GOM_IGNORE_USERS: ${{ secrets.GOM_IGNORE_USERS }}
+          GOM_ALSO_REPOS: ${{ secrets.GOM_ALSO_REPOS }}

.github/workflows/pr-metadata.yaml

@@ -0,0 +1,28 @@
+name: PR metadata
+
+on:
+  pull_request_target:
+    types:
+      - opened
+      - reopened
+      - edited
+      - synchronize
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+
+  #
+  # Set labels on PRs, which are then used to categorise release notes
+  #
+
+  labels:
+    name: Set labels
+    if: github.repository_owner == 'syncthing'
+    runs-on: ubuntu-latest
+    steps:
+    - uses: srvaroa/labeler@9c29ad1ef33d169f9ef33c52722faf47a566bcf3 # v1
+      env:
+        GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

.github/workflows/release-syncthing.yaml

@@ -0,0 +1,60 @@
+name: Release Syncthing
+
+on:
+  push:
+    branches:
+      - release
+      - release-rc*
+
+permissions:
+  contents: write
+
+jobs:
+  create-release-tag:
+    name: Create release tag
+    if: github.repository_owner == 'syncthing'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+          ref: ${{ github.ref }} # https://github.com/actions/checkout/issues/882
+          token: ${{ secrets.ACTIONS_GITHUB_TOKEN }}
+
+      - uses: actions/setup-go@v6
+        with:
+          go-version: stable
+
+      - name: Determine version to release
+        run: |
+          if [[ "$GITHUB_REF_NAME" == "release" ]] ; then
+            next=$(go run ./script/next-version.go)
+          else
+            next=$(go run ./script/next-version.go --pre)
+          fi
+          echo "NEXT=$next" >> $GITHUB_ENV
+          echo "Next version is $next"
+
+          prev=$(git describe --exclude "*-*" --abbrev=0)
+          echo "PREV=$prev" >> $GITHUB_ENV
+          echo "Previous version is $prev"
+
+      - name: Determine release notes
+        run: |
+          go run ./script/relnotes.go --new-ver "$NEXT" --branch "$GITHUB_REF_NAME" --prev-ver "$PREV" > notes.md
+        env:
+          GITHUB_TOKEN: ${{ secrets.ACTIONS_GITHUB_TOKEN }}
+
+      - name: Create and push tag
+        run: |
+          git config --global user.name 'Syncthing Release Automation'
+          git config --global user.email 'release@syncthing.net'
+          git tag -a -F notes.md --cleanup=whitespace "$NEXT"
+          git push origin "$NEXT"
+
+      - name: Trigger the build
+        uses: benc-uk/workflow-dispatch@7a027648b88c2413826b6ddd6c76114894dc5ec4 # v1
+        with:
+          workflow: build-syncthing.yaml
+          ref: refs/tags/${{ env.NEXT }}
+          token: ${{ secrets.ACTIONS_GITHUB_TOKEN }}

.github/workflows/trigger-nightly.yaml

@@ -5,14 +5,18 @@ on:
     # Run nightly build at 01:00 UTC
     - cron: '00 01 * * *'
 
+permissions:
+  contents: write
+
 jobs:
 
   trigger-nightly:
-    runs-on: ubuntu-latest
     name: Push to release-nightly to trigger build
+    if: github.repository_owner == 'syncthing'
+    runs-on: ubuntu-latest
     steps:
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           token: ${{ secrets.ACTIONS_GITHUB_TOKEN }}
           fetch-depth: 0

.github/workflows/update-docs-translations.yaml

@@ -4,17 +4,20 @@ on:
   schedule:
     - cron: '42 3 * * 1'
 
+permissions:
+  contents: write
+
 jobs:
 
   update_transifex_docs:
     runs-on: ubuntu-latest
     name: Update translations and documentation
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
           token: ${{ secrets.ACTIONS_GITHUB_TOKEN }}
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: stable
       - run: |

.golangci.yml

@@ -1,13 +1,15 @@
+version: "2"
 linters:
-  enable-all: true
+  default: all
   disable:
     - cyclop
     - depguard
     - err113
     - exhaustive
     - exhaustruct
+    - forbidigo
+    - funcorder
     - funlen
-    - gci
     - gochecknoglobals
     - gochecknoinits
     - gocognit
@@ -15,31 +17,83 @@ linters:
     - gocyclo
     - godot
     - godox
-    - gofmt
-    - goimports
     - gomoddirectives
     - inamedparam
     - interfacebloat
     - ireturn
     - lll
     - maintidx
+    - mnd
     - musttag
     - nestif
     - nlreturn
+    - noinlineerr
     - nonamedreturns
     - paralleltest
     - prealloc
+    - predeclared
     - protogetter
-    - scopelint
+    - recvcheck
+    - revive
     - tagalign
     - tagliatelle
     - testpackage
+    - usetesting # go 1.24
     - varnamelen
+    - whitespace
     - wrapcheck
     - wsl
-
-issues:
-  exclude-dirs:
-    - internal/gen
-    - cmd/dev
-    - repos
+    - wsl_v5
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    paths:
+      - internal/gen
+      - internal/db/olddb
+      - cmd/dev
+      - repos
+      - third_party$
+      - builtin$
+      - examples$
+      - _test\.go$
+    rules:
+      # relax the slog rules for debug lines, for now
+      - linters: [sloglint]
+        source: Debug
+      # contexts are irrelevant for SQLite
+      - linters: [noctx]
+        text: database/sql
+      # Rollback errors can be ignored
+      - linters: [errcheck]
+        source: Rollback
+      # Embedded fields named in selectors may add clarity
+      - linters: [staticcheck]
+        text: QF1008
+      # Don't necessarily rewrite !(foo || bar) to !foo && !bar
+      - linters: [staticcheck]
+        text: QF1001
+      # Don't necessarily pass the context just for the sake of the logger
+      - linters: [contextcheck]
+        text: "->log`"
+  settings:
+    sloglint:
+      context: "scope"
+      static-msg: true
+      msg-style: capitalized
+      key-naming-case: camel
+formatters:
+  enable:
+    - gofumpt
+  exclusions:
+    generated: lax
+    paths:
+      - internal/gen
+      - cmd/dev
+      - repos
+      - third_party$
+      - builtin$
+      - examples$

.policy.yml

@@ -8,17 +8,20 @@
 policy:
   approval:
     - subject is conventional commit
-    - project metadata requires maintainer approval
+    - or:
+      - project metadata requires maintainer approval
+      - a maintainer claims responsibility
     - or:
       - is approved by a syncthing contributor
       - is a translation or dependency update by a contributor
       - is a trivial change by a contributor
+      - a maintainer claims responsibility
 
-  # Additionally, contributors can disapprove of a PR
+  # Additionally, maintainers can disapprove of a PR
   disapproval:
     requires:
       teams:
-        - syncthing/contributors
+        - syncthing/maintainers
 
 # The rules for the policy are described below.
 
@@ -49,7 +52,8 @@ approval_rules:
         - syncthing/maintainers
     options:
       ignore_update_merges: true
-      allow_contributor: true
+      allow_non_author_contributor: true
+      invalidate_on_push: true
 
   # Regular pull requests require approval by an active contributor
   - name: is approved by a syncthing contributor
@@ -59,7 +63,8 @@ approval_rules:
         - syncthing/contributors
     options:
       ignore_update_merges: true
-      allow_contributor: true
+      allow_non_author_contributor: true
+      invalidate_on_push: true
 
   # Changes to some files (translations, dependencies, compatibility) do not
   # require approval if they were proposed by a contributor and have a
@@ -96,3 +101,13 @@ approval_rules:
       has_author_in:
         teams:
           - syncthing/contributors
+
+  # A member of the maintainers group can take responsibility by adding the
+  # appropriate label.
+  - name: a maintainer claims responsibility
+    if:
+      has_labels:
+        - maintainer-responsibility
+      has_author_in:
+        teams:
+          - syncthing/maintainers

AUTHORS

@@ -13,119 +13,119 @@
 # contents of this file.
 #
 
-Aaron Bieber (qbit) <qbit@deftly.net>
+Jakob Borg (calmh) <jakob@nym.se> <jakob@kastelo.net> <jborg@coreweave.com>
+Audrius Butkevicius (AudriusButkevicius) <audrius.butkevicius@gmail.com> <github@audrius.rocks>
+Simon Frei (imsodin) <freisim93@gmail.com>
+Tomasz Wilczyński <5626656+tomasz1986@users.noreply.github.com> <twilczynski@naver.com>
+Alexander Graf (alex2108) <register-github@alex-graf.de>
+Alexandre Viau (aviau) <alexandre@alexandreviau.net> <aviau@debian.org>
+Anderson Mesquita (andersonvom) <andersonvom@gmail.com>
+André Colomb (acolomb) <src@andre.colomb.de> <github.com@andre.colomb.de>
+Antony Male (canton7) <antony.male@gmail.com>
+Ben Schulz (uok) <ueomkail@gmail.com> <uok@users.noreply.github.com>
+bt90 <btom1990@googlemail.com>
+Caleb Callaway (cqcallaw) <enlightened.despot@gmail.com>
+Daniel Harte (norgeous) <daniel@harte.me> <daniel@danielharte.co.uk> <norgeous@users.noreply.github.com>
+Emil Lundberg <emil@emlun.se>
+Eric P <eric@kastelo.net>
+Evgeny Kuznetsov <evgeny@kuznetsov.md>
+greatroar <61184462+greatroar@users.noreply.github.com>
+Lars K.W. Gohlke (lkwg82) <lkwg82@gmx.de>
+Lode Hoste (Zillode) <zillode@zillode.be>
+Marcus B Spencer <marcus@marcusspencer.xyz> <marcus@marcusspencer.us>
+Michael Ploujnikov (plouj) <ploujj@gmail.com>
+Ross Smith II (rasa) <ross@smithii.com>
+Stefan Tatschner (rumpelsepp) <stefan@sevenbyte.org> <rumpelsepp@sevenbyte.org> <stefan@rumpelsepp.org>
+Tommy van der Vorst <tommy-github@pixelspark.nl> <tommy@pixelspark.nl>
+Wulf Weich (wweich) <wweich@users.noreply.github.com> <wweich@gmx.de> <wulf@weich-kr.de>
 Adam Piggott (ProactiveServices) <aD@simplypeachy.co.uk> <simplypeachy@users.noreply.github.com> <ProactiveServices@users.noreply.github.com> <adam@proactiveservices.co.uk>
 Adel Qalieh (adelq) <aqalieh95@gmail.com> <adelq@users.noreply.github.com>
-Alan Pope <alan@popey.com>
-Alberto Donato <albertodonato@users.noreply.github.com>
 Aleksey Vasenev <margtu-fivt@ya.ru>
 Alessandro G. (alessandro.g89) <alessandro.g89@gmail.com>
 Alex Ionescu <github@ionescu.sh>
 Alex Lindeman <139387+aelindeman@users.noreply.github.com>
 Alex Xu <alex.hello71@gmail.com>
-Alexander Graf (alex2108) <register-github@alex-graf.de>
 Alexander Seiler <seileralex@gmail.com>
 Alexandre Alves <alexandrealvesdb.contact@gmail.com>
-Alexandre Viau (aviau) <alexandre@alexandreviau.net> <aviau@debian.org>
 Aman Gupta <aman@tmm1.net>
-Anatoli Babenia <anatoli@rainforce.org>
-Anderson Mesquita (andersonvom) <andersonvom@gmail.com>
 Andreas Sommer <andreas.sommer87@googlemail.com>
 andresvia <andres.via@gmail.com>
-Andrew Dunham (andrew-d) <andrew@du.nham.ca>
-Andrew Meyer <andrewm.bpi@gmail.com>
 Andrew Rabert (nvllsvm) <ar@nullsum.net> <6550543+nvllsvm@users.noreply.github.com>
 Andrey D (scienmind) <scintertech@cryptolab.net> <scienmind@users.noreply.github.com>
-André Colomb (acolomb) <src@andre.colomb.de> <github.com@andre.colomb.de>
 andyleap <andyleap@gmail.com>
 Anjan Momi <anjan@momi.ca>
 Anthony Goeckner <agoeckner@users.noreply.github.com>
 Antoine Lamielle (0x010C) <antoine.lamielle@0x010c.fr> <gh@0x010c.fr>
-Antony Male (canton7) <antony.male@gmail.com>
 Anur <anurnomeru@163.com>
 Aranjedeath <Aranjedeath@users.noreply.github.com>
+ardevd <ardevd@users.noreply.github.com>
 Arkadiusz Tymiński <gevleeog@gmail.com>
 Aroun <login@b-vo.fr>
 Arthur Axel fREW Schmidt (frioux) <frew@afoolishmanifesto.com> <frioux@gmail.com>
 Artur Zubilewicz <AkaZecik@users.noreply.github.com>
-Audrius Butkevicius (AudriusButkevicius) <audrius.butkevicius@gmail.com> <github@audrius.rocks>
+Ashish Bhate <bhate.ashish@gmail.com>
 Aurélien Rainone <476650+arl@users.noreply.github.com>
 BAHADIR YILMAZ <bahadiryilmaz32@gmail.com>
 Bart De Vries (mogwa1) <devriesb@gmail.com>
 Beat Reichenbach <44111292+beatreichenbach@users.noreply.github.com>
-Ben Curthoys (bencurthoys) <ben@bencurthoys.com>
-Ben Schulz (uok) <ueomkail@gmail.com> <uok@users.noreply.github.com>
+Ben Norcombe <bennorcombe@pm.me>
 Ben Shepherd (benshep) <bjashepherd@gmail.com>
 Ben Sidhom (bsidhom) <bsidhom@gmail.com>
 Benedikt Heine (bebehei) <bebe@bebehei.de>
-Benedikt Morbach <benedikt.morbach@googlemail.com>
-Benjamin Nater <17193640+bn4t@users.noreply.github.com>
 Benno Fünfstück <benno.fuenfstueck@gmail.com>
 Benny Ng (tpng) <benny.tpng@gmail.com>
 boomsquared <54829195+boomsquared@users.noreply.github.com>
 Boqin Qin <bobbqqin@bupt.edu.cn>
 Boris Rybalkin <ribalkin@gmail.com>
-Brandon Philips (philips) <brandon@ifup.org>
 Brendan Long (brendanlong) <self@brendanlong.com>
-Brian R. Becker (brbecker) <brbecker@gmail.com>
-bt90 <btom1990@googlemail.com>
-Caleb Callaway (cqcallaw) <enlightened.despot@gmail.com>
-Carsten Hagemann (carstenhag) <moter8@gmail.com> <carsten@chagemann.de>
 Catfriend1 <16361913+Catfriend1@users.noreply.github.com>
 Cathryne Linenweaver (Cathryne) <cathryne.linenweaver@gmail.com> <Cathryne@users.noreply.github.com> <katrinleinweber@MAC.local>
 Cedric Staniewski (xduugu) <cedric@gmx.ca>
-chenrui <rui@meetup.com>
 Chih-Hsuan Yen <yan12125@gmail.com> <1937689+yan12125@users.noreply.github.com>
 Choongkyu <choongkyu.kim+gh@gmail.com> <vapidlyrapid+gh@gmail.com>
 Chris Howie (cdhowie) <me@chrishowie.com>
 Chris Joel (cdata) <chris@scriptolo.gy>
-Chris Tonkinson <chris@masterbran.ch>
 Christian Kujau <ckujau@users.noreply.github.com>
 Christian Prescott <me@christianprescott.com>
 chucic <chucic@seznam.cz>
 cjc7373 <niuchangcun@gmail.com>
 Colin Kennedy (moshen) <moshen.colin@gmail.com>
 Cromefire_ <tim.l@nghorst.net> <26320625+cromefire@users.noreply.github.com>
-cui fliter <imcusg@gmail.com>
+cui <cuiweixie@gmail.com>
 Cyprien Devillez <cypx@users.noreply.github.com>
 d-volution <49024624+d-volution@users.noreply.github.com>
-Dale Visser <dale.visser@live.com>
 Dan <benda.daniel@gmail.com>
 Daniel Barczyk <46358936+DanielBarczyk@users.noreply.github.com>
 Daniel Bergmann (brgmnn) <dan.arne.bergmann@gmail.com> <brgmnn@users.noreply.github.com>
-Daniel Harte (norgeous) <daniel@harte.me> <daniel@danielharte.co.uk> <norgeous@users.noreply.github.com>
 Daniel Martí (mvdan) <mvdan@mvdan.cc>
 Daniel Padrta <64928366+danpadcz@users.noreply.github.com>
+Daniil Gentili <daniil@daniil.it>
 Darshil Chanpura (dtchanpura) <dtchanpura@gmail.com> <dcprime314@gmail.com>
 dashangcun <907225865@qq.com>
 David Rimmer (dinosore) <dinosore@dbrsoftware.co.uk>
-deepsource-autofix[bot] <62050782+deepsource-autofix[bot]@users.noreply.github.com>
 DeflateAwning <11021263+DeflateAwning@users.noreply.github.com>
 Denis A. (dva) <denisva@gmail.com>
 Dennis Wilson (snnd) <dw@risu.io>
-dependabot-preview[bot] <dependabot-preview[bot]@users.noreply.github.com> <27856297+dependabot-preview[bot]@users.noreply.github.com>
-dependabot[bot] <dependabot[bot]@users.noreply.github.com> <49699333+dependabot[bot]@users.noreply.github.com>
 derekriemer <derek.riemer@colorado.edu>
 DerRockWolf <50499906+DerRockWolf@users.noreply.github.com>
 desbma <desbma@users.noreply.github.com>
 Devon G. Redekopp <devon@redekopp.com>
-diemade <spamkill@posteo.ch>
 digital <didev@dinid.net>
 Dimitri Papadopoulos Orfanos <3234522+DimitriPapadopoulos@users.noreply.github.com>
 Dmitry Saveliev (dsaveliev) <d.e.saveliev@gmail.com>
+domain <32405309+szu17dmy@users.noreply.github.com>
 Domenic Horner <domenic@tgxn.net>
 Dominik Heidler (asdil12) <dominik@heidler.eu>
 Elias Jarlebring (jarlebring) <jarlebring@gmail.com>
 Elliot Huffman <thelich2@gmail.com>
 Emil Hessman (ceh) <emil@hessman.se>
-Emil Lundberg <emil@emlun.se>
 Eng Zer Jun <engzerjun@gmail.com>
 entity0xfe <109791748+entity0xfe@users.noreply.github.com> <entity0xfe@my.domain>
+Epifeny <batterystarter@gmail.com>
+epifeny <epifeny@users.noreply.github.com>
 Eric Lesiuta <elesiuta@gmail.com>
-Eric P <eric@kastelo.net>
 Erik Meitner (WSGCSysadmin) <e.meitner@willystreet.coop>
 Evan Spensley <94762716+0evan@users.noreply.github.com>
-Evgeny Kuznetsov <evgeny@kuznetsov.md>
 Federico Castagnini (facastagnini) <federico.castagnini@gmail.com>
 Felix <53702818+f-eliks@users.noreply.github.com>
 Felix Ableitner (Nutomic) <me@nutomic.com>
@@ -139,7 +139,6 @@ ghjklw <malo@jaffre.info>
 Gilli Sigurdsson (gillisig) <gilli@vx.is>
 Gleb Sinyavskiy <zhulik.gleb@gmail.com>
 Graham Miln (grahammiln) <graham.miln@dssw.co.uk> <graham.miln@miln.eu>
-greatroar <61184462+greatroar@users.noreply.github.com>
 Greg <gco@jazzhaiku.com>
 guangwu <guoguangwu@magic-shield.com>
 gudvinr <gudvinr@gmail.com>
@@ -147,56 +146,43 @@ Gusted <postmaster@gusted.xyz> <williamzijl7@hotmail.com>
 Han Boetes <han@boetes.org>
 HansK-p <42314815+HansK-p@users.noreply.github.com>
 Harrison Jones (harrisonhjones) <harrisonhjones@users.noreply.github.com>
+Hazem Krimi <me@hazemkrimi.tech>
 Heiko Zuerker (Smiley73) <heiko@zuerker.org>
 Hireworks <129852174+hireworksltd@users.noreply.github.com>
 Hugo Locurcio <hugo.locurcio@hugo.pro>
 Iain Barnett <iainspeed@gmail.com>
 Ian Johnson (anonymouse64) <ian.johnson@canonical.com> <person.uwsome@gmail.com>
 ignacy123 <ignacy.buczek@onet.pl>
-Ikko Ashimine <eltociear@gmail.com>
-Ilya Brin <464157+ilyabrin@users.noreply.github.com>
 Iskander Sharipov (Alex) <quasilyte@gmail.com>
 Jaakko Hannikainen (jgke) <jgke@jgke.fi>
-Jacek Szafarkiewicz (hadogenes) <szafar@linux.pl>
 Jack Croft <jccroft1@users.noreply.github.com>
 Jacob <jyundt@gmail.com>
 Jake Peterson (acogdev) <jake@acogdev.com>
-Jakob Borg (calmh) <jakob@nym.se> <jakob@kastelo.net> <jborg@coreweave.com>
 James O'Beirne <wild-github@au92.org>
 James Patterson (jpjp) <jamespatterson@operamail.com> <jpjp@users.noreply.github.com>
-janost <janost@tuta.io>
 Jaroslav Lichtblau <svetlemodry@users.noreply.github.com>
 Jaroslav Malec (dzarda) <dzardacz@gmail.com>
-jaseg <githubaccount@jaseg.net>
 Jaspitta <ste.scarpitta@gmail.com>
-Jauder Ho <jauderho@users.noreply.github.com>
 Jaya Chithra (jayachithra) <s.k.jayachithra@gmail.com>
 Jaya Kumar <jaya.kumar@ict.nl>
 Jeffery To <jeffery.to@gmail.com>
 jelle van der Waa <jelle@vdwaa.nl>
 Jens Diemer (jedie) <github.com@jensdiemer.de> <git@jensdiemer.de>
-Jerry Jacobs (xor-gate) <jerry.jacobs@xor-gate.org> <xor-gate@users.noreply.github.com>
-Jesse Lucas <jesse@jesselucas.com>
 Jochen Voss (seehuhn) <voss@seehuhn.de>
-Johan Andersson <j@i19.se>
 Johan Vromans (sciurius) <jvromans@squirrel.nl>
 John Rinehart (fuzzybear3965) <johnrichardrinehart@gmail.com>
 Jonas Thelemann <e-mail@jonas-thelemann.de>
 Jonathan <artback@protonmail.com> <jonagn@gmail.com>
-Jonathan Cross <jcross@gmail.com>
-Jonta <359397+Jonta@users.noreply.github.com>
 Jose Manuel Delicado (jmdaweb) <jmdaweb@hotmail.com> <jmdaweb@users.noreply.github.com>
+JRNitre <nichinichisou67@outlook.com>
 jtagcat <git-514635f7@jtag.cat> <git-12dbd862@jtag.cat>
 Julian Lehrhuber <jul13579@users.noreply.github.com>
 Jörg Thalheim <Mic92@users.noreply.github.com>
 Jędrzej Kula <kula.jedrek@gmail.com>
-K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
-Kalle Laine <pahakalle@protonmail.com>
 Kapil Sareen <kapilsareen584@gmail.com>
 Karol Różycki (krozycki) <rozycki.karol@gmail.com>
 Kebin Liu <lkebin@gmail.com>
 Keith Harrison <keithh@protonmail.com>
-Keith Turner <kturner@apache.org>
 Kelong Cong (kc1212) <kc04bc@gmx.com> <kc1212@users.noreply.github.com>
 Ken'ichi Kamada (kamadak) <kamada@nanohz.org>
 Kevin Allen (ironmig) <kma1660@gmail.com>
@@ -205,30 +191,24 @@ Kevin White, Jr. (kwhite17) <kevinwhite1710@gmail.com>
 klemens <ka7@github.com>
 Kurt Fitzner (Kudalufi) <kurt@va1der.ca> <kurt.fitzner@gmail.com>
 kylosus <33132401+kylosus@users.noreply.github.com>
-Lars K.W. Gohlke (lkwg82) <lkwg82@gmx.de>
 Lars Lehtonen <lars.lehtonen@gmail.com>
-Laurent Arnoud <laurent@spkdev.net>
 Laurent Etiemble (letiemble) <laurent.etiemble@gmail.com> <laurent.etiemble@monobjc.net>
 Leo Arias (elopio) <yo@elopio.net>
 Liu Siyuan (liusy182) <liusy182@gmail.com> <liusy182@hotmail.com>
-Lode Hoste (Zillode) <zillode@zillode.be>
 Lord Landon Agahnim (LordLandon) <lordlandon@gmail.com>
 LSmithx2 <42276854+lsmithx2@users.noreply.github.com>
-luchenhan <168071714+luchenhan@users.noreply.github.com>
+Luiz Angelo Daros de Luca <luizluca@gmail.com>
 Lukas Lihotzki <lukas@lihotzki.de>
 Luke Hamburg <1992842+luckman212@users.noreply.github.com>
 luzpaz <luzpaz@users.noreply.github.com>
 Majed Abdulaziz (majedev) <majed.alhajry@gmail.com>
 Marc Laporte (marclaporte) <marc@marclaporte.com> <marc@laporte.name>
-Marc Pujol (kilburn) <kilburn@la3.org>
+Marcel Meyer <mm.marcelmeyer@gmail.com>
 Marcin Dziadus (marcindziadus) <dziadus.marcin@gmail.com>
-marco-m <marco.molteni@laposte.net>
-Marcus B Spencer <marcus@marcusspencer.xyz>
 Marcus Legendre <marcus.legendre@gmail.com>
 Mario Majila <mariustshipichik@gmail.com>
 Mark Pulford (mpx) <mark@kyne.com.au>
 Martchus <martchus@gmx.net>
-Martin Polehla <p0l0us@users.noreply.github.com>
 Mateusz Naściszewski (mateon1) <matin1111@wp.pl>
 Mateusz Ż <thedead4fun@live.com>
 mathias4833 <67101597+mathias4833@users.noreply.github.com>
@@ -239,15 +219,12 @@ Matteo Ruina <matteo.ruina@gmail.com>
 Maurizio Tomasi <ziotom78@gmail.com>
 Max <github@germancoding.com>
 Max Schulze (kralo) <max.schulze@online.de> <kralo@users.noreply.github.com>
-maxice8 <30738253+maxice8@users.noreply.github.com>
 MaximAL <almaximal@ya.ru>
-Maxime Thirouin <m@moox.io>
 Maximilian <maxi.rostock@outlook.de> <public@complexvector.space>
-mclang <1721600+mclang@users.noreply.github.com>
+Maxwell G <maxwell@gtmx.me>
 Michael Jephcote (Rewt0r) <rewt0r@gmx.com> <Rewt0r@users.noreply.github.com>
-Michael Ploujnikov (plouj) <ploujj@gmail.com>
 Michael Rienstra <mrienstra@gmail.com>
-Michael Tilli (pyfisch) <pyfisch@gmail.com>
+Michael Wang 汪東陽 <michael19920327@gmail.com>
 MichaIng <micha@dietpi.com>
 Migelo <miha@filetki.si>
 Mike Boone <mike@boonedocks.net>
@@ -256,7 +233,6 @@ MikolajTwarog <43782609+MikolajTwarog@users.noreply.github.com>
 Mingxuan Lin <gdlmx@users.noreply.github.com>
 mv1005 <49659413+mv1005@users.noreply.github.com>
 Nate Morrison (nrm21) <natemorrison@gmail.com>
-Naveen <172697+naveensrinivasan@users.noreply.github.com>
 nf <nf@wh3rd.net>
 Nicholas Rishel (PrototypeNM1) <rishel.nick@gmail.com> <PrototypeNM1@users.noreply.github.com>
 Nick Busey <NickBusey@users.noreply.github.com>
@@ -271,14 +247,13 @@ NoLooseEnds <jon.koslung@gmail.com>
 Oliver Freyermuth <o.freyermuth@googlemail.com>
 orangekame3 <miya.org.0309@gmail.com>
 otbutz <tbutz@optitool.de>
-Otiel <Otiel@users.noreply.github.com>
 overkill <22098433+0verk1ll@users.noreply.github.com>
 Oyebanji Jacob Mayowa <oyebanji05@gmail.com>
 Pablo <pbaeyens31+github@gmail.com>
 Pascal Jungblut (pascalj) <github@pascalj.com> <mail@pascal-jungblut.com>
 Paul Brit <paulbrit44@gmail.com>
+Paul Donald <newtwen+github@gmail.com>
 Pawel Palenica (qepasa) <pawelpalenica11@gmail.com>
-Paweł Rozlach <vespian@users.noreply.github.com>
 perewa <cavalcante.ten@gmail.com>
 Peter Badida <KeyWeeUsr@users.noreply.github.com>
 Peter Dave Hello <hsu@peterdavehello.org>
@@ -288,19 +263,18 @@ Phani Rithvij <phanirithvij2000@gmail.com>
 Phil Davis <phil.davis@inf.org>
 Philippe Schommers (filoozoom) <philippe@schommers.be>
 Phill Luby (pluby) <phill.luby@newredo.com>
-Pier Paolo Ramon <ramonpierre@gmail.com>
 Piotr Bejda (piobpl) <piotrb10@gmail.com>
 polyfloyd <polyfloyd@users.noreply.github.com>
-Pramodh KP (pramodhkp) <pramodh.p@directi.com> <1507241+pramodhkp@users.noreply.github.com>
+Prathik P Kulkarni <83969842+prathik8794@users.noreply.github.com>
+pullmerge <166967364+pullmerge@users.noreply.github.com>
 Quentin Hibon <qh.public@yahoo.com>
 Rahmi Pruitt <rjpruitt16@gmail.com>
+RealCharlesChia <161665317+RealCharlesChia@users.noreply.github.com>
 red_led <red-led@users.noreply.github.com>
-Richard Hartmann <RichiH@users.noreply.github.com>
 Robert Carosi (nov1n) <robert@carosi.nl>
 Roberto Santalla <roobre@users.noreply.github.com>
 Robin Schoonover <robin@cornhooves.org>
 Roman Zaynetdinov (zaynetro) <romanznet@gmail.com>
-Ross Smith II (rasa) <ross@smithii.com>
 rubenbe <github-com-00ff86@vandamme.email>
 Ruslan Yevdokymov <38809160+ruslanye@users.noreply.github.com>
 Ryan Qian <i@bitbili.net>
@@ -312,38 +286,35 @@ Sergey Mishin (ralder) <ralder@yandex.ru>
 Sertonix <83883937+Sertonix@users.noreply.github.com>
 Severin von Wnuck-Lipinski <ss7@live.de>
 Shaarad Dalvi <60266155+shaaraddalvi@users.noreply.github.com> <shdalv@microsoft.com>
-Simon Frei (imsodin) <freisim93@gmail.com>
+Shivam Kumar <155747305+maishivamhoo123@users.noreply.github.com>
 Simon Mwepu <simonmwepu@gmail.com>
 Simon Pickup <simon@pickupinfinity.com>
 Sly_tom_cat <slytomcat@mail.ru>
 Sonu Kumar Saw <31889738+dev-saw99@users.noreply.github.com>
 Stefan Kuntz (Stefan-Code) <stefan.github@gmail.com> <Stefan.github@gmail.com>
-Stefan Tatschner (rumpelsepp) <stefan@sevenbyte.org> <rumpelsepp@sevenbyte.org> <stefan@rumpelsepp.org>
 Steven Eckhoff <steven.eckhoff.opensource@gmail.com>
 Suhas Gundimeda (snugghash) <suhas.gundimeda@gmail.com> <snugghash@gmail.com>
 Sven Bachmann <dev@mcbachmann.de>
-Syncthing Automation <automation@syncthing.net>
-Syncthing Release Automation <release@syncthing.net>
 Sébastien WENSKE <sebastien@wenske.fr>
+Tao <mail@steadytao.com>
 Taylor Khan (nelsonkhan) <nelsonkhan@gmail.com>
 Terrance <git@terrance.allofti.me>
+TheCreeper <TheCreeper@users.noreply.github.com>
 Thomas <9749173+uhthomas@users.noreply.github.com>
 Thomas Hipp <thomashipp@gmail.com>
 Tim Abell (timabell) <tim@timwise.co.uk>
 Tim Howes (timhowes) <timhowes@berkeley.edu>
-Tim Nordenfur <tim@gurka.se>
 Tobias Frölich <40638719+tobifroe@users.noreply.github.com>
 Tobias Klauser <tobias.klauser@gmail.com>
 Tobias Nygren (tnn2) <tnn@nygren.pp.se>
 Tobias Tom (tobiastom) <t.tom@succont.de>
 Tom Jakubowski <tom@crystae.net>
-Tomasz Wilczyński <5626656+tomasz1986@users.noreply.github.com> <twilczynski@naver.com>
-Tommy Thorn <tommy-github-email@thorn.ws>
-Tommy van der Vorst <tommy-github@pixelspark.nl> <tommy@pixelspark.nl>
 Tully Robinson (tojrobinson) <tully@tojr.org>
 Tyler Brazier (tylerbrazier) <tyler@tylerbrazier.com>
 Tyler Kropp <kropptyler@gmail.com>
+Umer-Azaz <umer_azaz@yahoo.com>
 Unrud (Unrud) <unrud@openaliasbox.org> <Unrud@users.noreply.github.com>
+Val Markovic <val@markovic.io>
 vapatel2 <149737089+vapatel2@users.noreply.github.com>
 Veeti Paananen (veeti) <veeti.paananen@rojekti.fi>
 Victor Buinsky (buinsky) <vix_booja@tut.by>
@@ -351,15 +322,16 @@ Vik <63919734+ViktorOn@users.noreply.github.com>
 Vil Brekin (Vilbrekin) <vilbrekin@gmail.com>
 villekalliomaki <53118179+villekalliomaki@users.noreply.github.com>
 Vladimir Rusinov <vrusinov@google.com> <vladimir.rusinov@gmail.com>
+vvaswani <2571660+vvaswani@users.noreply.github.com>
 wangguoliang <liangcszzu@163.com>
 WangXi <xib1102@icloud.com>
 Will Rouesnel <wrouesnel@wrouesnel.com>
 William A. Kennington III (wkennington) <william@wkennington.com>
 wouter bolsterlee <wouter@bolsterl.ee>
-Wulf Weich (wweich) <wweich@users.noreply.github.com> <wweich@gmx.de> <wulf@weich-kr.de>
 xarx00 <xarx00@users.noreply.github.com>
 Xavier O. (damajor) <damajor@gmail.com>
-xjtdy888 (xjtdy888) <xjtdy888@163.com>
+xjtdy888 (xjtdy888) <xjtdy888@163.com> <xjtdy888@gmail.com>
 Yannic A. (eipiminus1) <eipiminusone+github@gmail.com> <eipiminus1@users.noreply.github.com>
+yparitcher <y@paritcher.com>
 佛跳墙 <daoquan@qq.com>
 落心 <luoxin.ttt@gmail.com>

CONTRIBUTING.md

@@ -34,19 +34,163 @@ Note that the previously used service at
 retired and we kindly ask you to sign up on Weblate for continued
 involvement.
 
-## Contributing Code
-
-Every contribution is welcome. If you want to contribute but are unsure
-where to start, any open issues are fair game! See the [Contribution
-Guidelines](https://docs.syncthing.net/dev/contributing.html) for the full
-story on committing code.
-
 ## Contributing Documentation
 
 Updates to the [documentation site](https://docs.syncthing.net/) can be
 made as pull requests on the [documentation
 repository](https://github.com/syncthing/docs).
 
+## Contributing Code
+
+Every contribution is welcome. If you want to contribute but are unsure
+where to start, any open issues are fair game! Here's a short rundown of
+what you need to keep in mind:
+
+- Don't worry. You are not expected to get everything right on the first
+  attempt, we'll guide you through it.
+
+- Make sure there is an
+  [issue](https://github.com/syncthing/syncthing/issues) that describes the
+  change you want to do. If the thing you want to do does not have an issue
+  yet, please file one before starting work on it.
+
+- Fork the repository and make your changes in a new branch. Once it's ready
+  for review, create a pull request.
+
+### Authorship
+
+All code authors are listed in the AUTHORS file. When your first pull
+request is accepted your details are added to the AUTHORS file and the list
+of authors in the GUI. Commits must be made with the same name and email as
+listed in the AUTHORS file. To accomplish this, ensure that your git
+configuration is set correctly prior to making your first commit:
+
+    $ git config --global user.name "Jane Doe"
+    $ git config --global user.email janedoe@example.com
+
+You must be reachable on the given email address. If you do not wish to use
+your real name for whatever reason, using a nickname or pseudonym is
+perfectly acceptable.
+
+### The Developer Certificate of Origin (DCO)
+
+The Syncthing project requires the Developer Certificate of Origin (DCO)
+sign-off on pull requests (PRs). This means that all commit messages must
+contain a signature line to indicate that the developer accepts the DCO.
+
+The DCO is a lightweight way for contributors to certify that they wrote (or
+otherwise have the right to submit) the code and changes they are
+contributing to the project. Here is the full [text of the
+DCO](https://developercertificate.org):
+
+---
+
+By making a contribution to this project, I certify that:
+
+1. The contribution was created in whole or in part by me and I have the
+   right to submit it under the open source license indicated in the file;
+   or
+
+2. The contribution is based upon previous work that, to the best of my
+   knowledge, is covered under an appropriate open source license and I have
+   the right under that license to submit that work with modifications,
+   whether created in whole or in part by me, under the same open source
+   license (unless I am permitted to submit under a different license), as
+   indicated in the file; or
+
+3. The contribution was provided directly to me by some other person who
+   certified (1), (2) or (3) and I have not modified it.
+
+4. I understand and agree that this project and the contribution are public
+   and that a record of the contribution (including all personal information
+   I submit with it, including my sign-off) is maintained indefinitely and
+   may be redistributed consistent with this project or the open source
+   license(s) involved.
+
+---
+
+Contributors indicate that they adhere to these requirements by adding
+a `Signed-off-by` line to their commit messages.  For example:
+
+    This is my commit message
+
+    Signed-off-by: Random J Developer <random@developer.example.org>
+
+The name and email address in this line must match those of the committing
+author, and be the same as what you want in the AUTHORS file as per above.
+
+### Coding Style
+
+#### General
+
+- All text files use Unix line endings. The git settings already present in
+  the repository attempt to enforce this.
+
+- When making changes, follow the brace and parenthesis style of the
+  surrounding code.
+
+#### Go Specific
+
+- Follow the conventions laid out in [Effective
+  Go](https://go.dev/doc/effective_go) as much as makes sense. The review
+  guidelines in [Go Code Review
+  Comments](https://github.com/golang/go/wiki/CodeReviewComments) should
+  generally be followed.
+
+- Each commit should be `go fmt` clean.
+
+- Imports are grouped per `goimports` standard; that is, standard
+  library first, then third party libraries after a blank line.
+
+### Commits
+
+- Commit messages (and pull request titles) should follow the [conventional
+  commits](https://www.conventionalcommits.org/en/v1.0.0/) specification and
+  be in lower case.
+
+- We use a scope description in the commit message subject. This is the
+  component of Syncthing that the commit affects. For example, `gui`,
+  `protocol`, `scanner`, `upnp`, etc -- typically, the part after
+  `internal/`, `lib/` or `cmd/` in the package path. If the commit doesn't
+  affect a specific component, such as for changes to the build system or
+  documentation, the scope should be omitted. The same goes for changes that
+  affect many components which would be cumbersome to list.
+
+- Commits that resolve an existing issue must include the issue number
+  as `(fixes #123)` at the end of the commit message subject. A correctly
+  formatted commit message subject looks like this:
+
+      feat(dialer): add env var to disable proxy fallback (fixes #3006)
+
+- If the commit message subject doesn't say it all, one or more paragraphs of
+  describing text should be added to the commit message. This should explain
+  why the change is made and what it accomplishes.
+
+- When drafting a pull request, please feel free to add commits with
+  corrections and merge from `main` when necessary. This provides a clear time
+  line with changes and simplifies review. Do not, in general, rebase your
+  commits, as this makes review harder.
+
+- Pull requests are merged to `main` using squash merge. The "stream of
+  consciousness" set of commits described in the previous point will be reduced
+  to a single commit at merge time. The pull request title and description will
+  be used as the commit message.
+
+### Tests
+
+Yes please, do add tests when adding features or fixing bugs. Also, when a
+pull request is filed a number of automatic tests are run on the code. This
+includes:
+
+- That the code actually builds and the test suite passes.
+
+- That the code is correctly formatted (`go fmt`).
+
+- That the commits are based on a reasonably recent `main`.
+
+- That the output from `go lint` and `go vet` is clean. (This checks for a
+  number of potential problems the compiler doesn't catch.)
+
 ## Licensing
 
 All contributions are made available under the same license as the already
@@ -59,10 +203,6 @@ otherwise stated this means MPLv2, but there are exceptions:
 - The documentation (man/...) is licensed under the Creative Commons
   Attribution 4.0 International License.
 
-- Projects under vendor/... are copyright by and licensed from their
-  respective original authors. Contributions should be made to the original
-  project, not here.
-
 Regardless of the license in effect, you retain the copyright to your
 contribution.
 

README-Docker.md

@@ -23,52 +23,7 @@ example `UMASK=002`.
 **Docker cli**
 ```
 $ docker pull syncthing/syncthing
-$ docker run -p 8384:8384 -p 22000:22000/tcp -p 22000:22000/udp -p 21027:21027/udp \
-    -v /wherever/st-sync:/var/syncthing \
-    --hostname=my-syncthing \
-    syncthing/syncthing:latest
-```
-
-**Docker compose**
-```yml
----
-version: "3"
-services:
-  syncthing:
-    image: syncthing/syncthing
-    container_name: syncthing
-    hostname: my-syncthing
-    environment:
-      - PUID=1000
-      - PGID=1000
-    volumes:
-      - /wherever/st-sync:/var/syncthing
-    ports:
-      - 8384:8384 # Web UI
-      - 22000:22000/tcp # TCP file transfers
-      - 22000:22000/udp # QUIC file transfers
-      - 21027:21027/udp # Receive local discovery broadcasts
-    restart: unless-stopped
-    healthcheck:
-      test: curl -fkLsS -m 2 127.0.0.1:8384/rest/noauth/health | grep -o --color=never OK || exit 1
-      interval: 1m
-      timeout: 10s
-      retries: 3
-```
-
-## Discovery
-
-Note that Docker's default network mode prevents local IP addresses from
-being discovered, as Syncthing is only able to see the internal IP of the
-container on the `172.17.0.0/16` subnet. This will result in poor transfer rates
-if local device addresses are not manually configured.
-
-It is therefore advisable to use the [host network mode](https://docs.docker.com/network/host/) instead:
-
-**Docker cli**
-```
-$ docker pull syncthing/syncthing
-$ docker run --network=host \
+$ docker run --network=host  -e STGUIADDRESS= \
     -v /wherever/st-sync:/var/syncthing \
     syncthing/syncthing:latest
 ```
@@ -85,6 +40,7 @@ services:
     environment:
       - PUID=1000
       - PGID=1000
+      - STGUIADDRESS=
     volumes:
       - /wherever/st-sync:/var/syncthing
     network_mode: host
@@ -96,27 +52,27 @@ services:
       retries: 3
 ```
 
+## Discovery
+
+Please note that Docker's default network mode prevents local IP addresses
+from being discovered, as Syncthing can only see the internal IP address of
+the container on the `172.17.0.0/16` subnet. This would likely break the ability
+for nodes to establish LAN connections properly, resulting in poor transfer
+rates unless local device addresses are configured manually.
+
+It is therefore strongly recommended to stick to the [host network mode](https://docs.docker.com/network/host/),
+as shown above.
+
 Be aware that syncthing alone is now in control of what interfaces and ports it
 listens on. You can edit the syncthing configuration to change the defaults if
 there are conflicts.
 
 ## GUI Security
 
-By default Syncthing inside the Docker image listens on 0.0.0.0:8384 to
-allow GUI connections via the Docker proxy. This is set by the
-`STGUIADDRESS` environment variable in the Dockerfile, as it differs from
-what Syncthing would otherwise use by default. This means you should set up
-authentication in the GUI, like for any other externally reachable Syncthing
-instance. If you do not require the GUI, or you use host networking, you can
-unset the `STGUIADDRESS` variable to have Syncthing fall back to listening
-on 127.0.0.1:
-
-```
-$ docker pull syncthing/syncthing
-$ docker run -e STGUIADDRESS= \
-    -v /wherever/st-sync:/var/syncthing \
-    syncthing/syncthing:latest
-```
-
-With the environment variable unset Syncthing will follow what is set in the
-configuration file / GUI settings dialog.
+By default Syncthing inside the Docker image listens on `0.0.0.0:8384`. This
+allows GUI connections when running without host network mode. The example
+above unsets the `STGUIADDRESS` environment variable to have Syncthing fall
+back to listening on what has been configured in the configuration file or the
+GUI settings dialog. By default this is the localhost IP address `127.0.0.1`.
+If you configure your GUI to be externally reachable, make sure you set up
+authentication and enable TLS.

build.go

@@ -329,7 +329,7 @@ func runCommand(cmd string, target target) {
 		writeCompatJSON()
 
 	case "deb":
-		buildDeb(target)
+		buildDeb(target, tags)
 
 	case "vet":
 		metalintShort()
@@ -592,7 +592,7 @@ func buildZip(target target, tags []string) {
 	fmt.Println(filename)
 }
 
-func buildDeb(target target) {
+func buildDeb(target target, tags []string) {
 	os.RemoveAll("deb")
 
 	// "goarch" here is set to whatever the Debian packages expect. We correct
@@ -606,7 +606,7 @@ func buildDeb(target target) {
 		goarch = "arm"
 	}
 
-	build(target, []string{"noupgrade"})
+	build(target, append(tags, "noupgrade"))
 
 	for i := range target.installationFiles {
 		target.installationFiles[i].src = strings.Replace(target.installationFiles[i].src, "{{binary}}", target.BinaryName(), 1)
@@ -870,7 +870,6 @@ func testmocks() {
 		"github.com/syncthing/syncthing/lib/connections",
 		"github.com/syncthing/syncthing/lib/discover",
 		"github.com/syncthing/syncthing/lib/events",
-		"github.com/syncthing/syncthing/lib/logger",
 		"github.com/syncthing/syncthing/lib/model",
 		"github.com/syncthing/syncthing/lib/protocol",
 	}
@@ -901,6 +900,7 @@ func weblate() {
 func ldflags(tags []string) string {
 	b := new(strings.Builder)
 	b.WriteString("-w")
+	b.WriteString(" -buildid=")
 	fmt.Fprintf(b, " -X github.com/syncthing/syncthing/lib/build.Version=%s", version)
 	fmt.Fprintf(b, " -X github.com/syncthing/syncthing/lib/build.Stamp=%d", buildStamp())
 	fmt.Fprintf(b, " -X github.com/syncthing/syncthing/lib/build.User=%s", buildUser())
@@ -922,6 +922,9 @@ func rmr(paths ...string) {
 }
 
 func getReleaseVersion() (string, error) {
+	if ver := os.Getenv("VERSION"); ver != "" {
+		return strings.TrimSpace(ver), nil
+	}
 	bs, err := os.ReadFile("RELEASE")
 	if err != nil {
 		return "", err
@@ -966,7 +969,7 @@ func getGitVersion() (string, error) {
 }
 
 func getVersion() string {
-	// First try for a RELEASE file,
+	// First try for a RELEASE file or $VERSION env var,
 	if ver, err := getReleaseVersion(); err == nil {
 		return ver
 	}

build.sh

@@ -23,6 +23,7 @@ case "${1:-default}" in
 
 	prerelease)
 		script authors
+		script copyrights
 		build weblate
 		pushd man ; ./refresh.sh ; popd
 		git add -A gui man AUTHORS

cmd/dev/stcompdirs/main.go

@@ -15,8 +15,6 @@ import (
 	"log"
 	"os"
 	"path/filepath"
-
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 )
 
 func main() {

cmd/dev/stdisco/main.go

@@ -18,7 +18,6 @@ import (
 	"google.golang.org/protobuf/proto"
 
 	"github.com/syncthing/syncthing/internal/gen/discoproto"
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/beacon"
 	"github.com/syncthing/syncthing/lib/discover"
 	"github.com/syncthing/syncthing/lib/protocol"

cmd/dev/stevents/main.go

@@ -14,8 +14,6 @@ import (
 	"net/http"
 	"os"
 	"time"
-
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 )
 
 type event struct {

cmd/dev/stfileinfo/main.go

@@ -13,7 +13,6 @@ import (
 	"os"
 	"path/filepath"
 
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/scanner"
 )

cmd/dev/stfinddevice/main.go

@@ -16,7 +16,6 @@ import (
 	"os"
 	"time"
 
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/config"
 	"github.com/syncthing/syncthing/lib/discover"
 	"github.com/syncthing/syncthing/lib/events"

cmd/dev/stfindignored/main.go

@@ -12,7 +12,6 @@ import (
 	"fmt"
 	"os"
 
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/fs"
 	"github.com/syncthing/syncthing/lib/ignore"
 )

cmd/dev/stgenfiles/main.go

@@ -15,8 +15,6 @@ import (
 	"os"
 	"path/filepath"
 	"time"
-
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 )
 
 func main() {

cmd/dev/stsigtool/main.go

@@ -12,7 +12,6 @@ import (
 	"log"
 	"os"
 
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/signature"
 	"github.com/syncthing/syncthing/lib/upgrade"
 )

cmd/dev/stvanity/main.go

@@ -26,7 +26,6 @@ import (
 	"sync/atomic"
 	"time"
 
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/protocol"
 )
 
@@ -53,11 +52,9 @@ func main() {
 	// Run one certificate generator per CPU core.
 	var wg sync.WaitGroup
 	for i := 0; i < runtime.GOMAXPROCS(-1); i++ {
-		wg.Add(1)
-		go func() {
+		wg.Go(func() {
 			generatePrefixed(prefix, &count, found, stop)
-			wg.Done()
-		}()
+		})
 	}
 
 	// Save the result, when one has been found.

cmd/dev/stwatchfile/main.go

@@ -13,8 +13,6 @@ import (
 	"io"
 	"os"
 	"time"
-
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 )
 
 func main() {

cmd/infra/stcrashreceiver/_testdata/gcerror.log

@@ -0,0 +1,76 @@
+2026-05-21 10:03:01 INF syncthing v2.1.1-dev.9.gb3b7d228.dirty-morecrashrep "Hafnium Hornet" (go1.26.3 darwin-arm64) jb@jbo-m3wl72rv 2026-05-21 07:58:11 UTC [stnoupgrade] (log.pkg=main)
+2026-05-21 10:03:01 INF No automatic upgrades; STNOUPGRADE environment variable defined (log.pkg=main)
+2026-05-21 10:03:01 INF Calculated our device ID (device=I6KAH76-66SLLLB-5PFXSOA-UFJCDZC-YAOMLEK-CP2GB32-BV5RQST-3PSROAU log.pkg=syncthing)
+2026-05-21 10:03:01 INF Overall rate limit in use (send="is unlimited" recv="is unlimited" log.pkg=connections)
+2026-05-21 10:03:01 INF Using discovery mechanism (identity="IPv4 local broadcast discovery on port 21027" log.pkg=discover)
+2026-05-21 10:03:01 INF Using discovery mechanism (identity="IPv6 local multicast discovery on address [ff12::8384]:21027" log.pkg=discover)
+2026-05-21 10:03:01 INF TCP listener starting (address=127.0.0.1:22001 log.pkg=connections)
+2026-05-21 10:03:01 INF Ready to synchronize (folder.id=default folder.type=sendreceive log.pkg=model)
+2026-05-21 10:03:01 INF QUIC listener starting (address=127.0.0.1:22001 log.pkg=connections)
+2026-05-21 10:03:01 INF GUI and API listening (address=127.0.0.1:8081 log.pkg=api)
+...
+2026-05-21 10:03:01 INF Access the GUI via the following URL: http://127.0.0.1:8081/ (log.pkg=api)
+2026-05-21 10:03:01 INF Loaded configuration (name=s1 log.pkg=syncthing)
+2026-05-21 10:03:01 INF Loaded peer device configuration (device=MRIW7OK name=s2 address="[tcp://127.0.0.1:22002 quic://127.0.0.1:22002]" log.pkg=syncthing)
+2026-05-21 10:03:01 INF Completed initial scan (folder.id=default folder.type=sendreceive log.pkg=model)
+0xee9de1fe260
+2026-05-21 10:03:02 INF Measured hashing performance (perf="2789.71 MB/s" log.pkg=syncthing)
+Panic at 2026-05-21T10:03:02+02:00
+runtime: marked free object in span 0x108b34d20, elemsize=8 freeindex=34 (bad use of unsafe.Pointer or having race conditions? try -d=checkptr or -race)
+0xee9de1fe000 alloc marked
+0xee9de1fe008 alloc marked
+...
+0xee9de1fe250 free  unmarked
+0xee9de1fe258 free  unmarked
+0xee9de1fe260 free  marked   zombie
+                   7 6 5 4  3 2 1 0   f e d c  b a 9 8  0123456789abcdef
+00000ee9de1fe260: 00000000 00000000                     ........
+0xee9de1fe268 free  unmarked
+0xee9de1fe270 free  unmarked
+...
+0xee9de1fff60 free  unmarked
+0xee9de1fff68 free  unmarked
+0xee9de1fff70 free  unmarked
+0xee9de1fff78 free  unmarked
+fatal error: found pointer to free object
+
+runtime stack:
+runtime.throw({0x105881781?, 0x8?})
+	runtime/panic.go:1229 +0x38 fp=0x16bf82bb0 sp=0x16bf82b80 pc=0x104f0ca48
+runtime.(*mspan).reportZombies(0x108b34d20)
+	runtime/mgcsweep.go:893 +0x314 fp=0x16bf82c30 sp=0x16bf82bb0 pc=0x104ec10b4
+runtime.(*sweepLocked).sweep(0x16bf82d88?, 0x0)
+	runtime/mgcsweep.go:673 +0xbd0 fp=0x16bf82d50 sp=0x16bf82c30 pc=0x104ec0840
+runtime.(*mcentral).uncacheSpan(0x16bf82db8?, 0x104ea4954?)
+	runtime/mcentral.go:237 +0xbc fp=0x16bf82d80 sp=0x16bf82d50 pc=0x104eaac3c
+runtime.(*mcache).releaseAll(0x1089a85f0)
+	runtime/mcache.go:322 +0x188 fp=0x16bf82df0 sp=0x16bf82d80 pc=0x104eaa4e8
+runtime.(*mcache).prepareForSweep(0x1089a85f0)
+	runtime/mcache.go:366 +0x4c fp=0x16bf82e20 sp=0x16bf82df0 pc=0x104eaa61c
+runtime.gcMarkTermination.func4(0xee9de005808)
+	runtime/mgc.go:1546 +0x24 fp=0x16bf82e50 sp=0x16bf82e20 pc=0x104f076e4
+runtime.forEachPInternal(0x10656f798)
+	runtime/proc.go:2167 +0x178 fp=0x16bf82ee0 sp=0x16bf82e50 pc=0x104eda728
+runtime.gcMarkTermination.forEachP.func7()
+	runtime/proc.go:2126 +0x40 fp=0x16bf82f10 sp=0x16bf82ee0 pc=0x104eb3130
+runtime.systemstack(0x7fc000)
+	runtime/asm_arm64.s:399 +0x68 fp=0x16bf82f20 sp=0x16bf82f10 pc=0x104f12888
+
+goroutine 84 gp=0xee9de45c1e0 m=3 mp=0xee9de019008 [flushing proc caches]:
+runtime.systemstack_switch()
+	runtime/asm_arm64.s:347 +0x8 fp=0xee9de805c40 sp=0xee9de805c30 pc=0x104f12808
+runtime.forEachP(...)
+	runtime/proc.go:2112
+runtime.gcMarkTermination({0xc0?, 0x1331f928480ca?, 0xc?, 0x0?})
+	runtime/mgc.go:1545 +0x5f4 fp=0xee9de805e80 sp=0xee9de805c40 pc=0x104eb28c4
+runtime.gcMarkDone()
+	runtime/mgc.go:1173 +0x364 fp=0xee9de805f20 sp=0xee9de805e80 pc=0x104eb1bc4
+runtime.gcBgMarkWorker(0xee9de341810)
+	runtime/mgc.go:1912 +0x29c fp=0xee9de805fb0 sp=0xee9de805f20 pc=0x104eb372c
+runtime.gcBgMarkStartWorkers.gowrap1()
+	runtime/mgc.go:1695 +0x20 fp=0xee9de805fd0 sp=0xee9de805fb0 pc=0x104eb3470
+runtime.goexit({})
+	runtime/asm_arm64.s:1447 +0x4 fp=0xee9de805fd0 sp=0xee9de805fd0 pc=0x104f14a04
+created by runtime.gcBgMarkStartWorkers in goroutine 1
+	runtime/mgc.go:1695 +0x134
+

cmd/infra/stcrashreceiver/diskstore.go

@@ -8,6 +8,7 @@ package main
 
 import (
 	"bytes"
+	"cmp"
 	"compress/gzip"
 	"context"
 	"io"
@@ -15,7 +16,7 @@ import (
 	"math"
 	"os"
 	"path/filepath"
-	"sort"
+	"slices"
 	"time"
 )
 
@@ -135,15 +136,25 @@ func (d *diskStore) Exists(path string) bool {
 }
 
 func (d *diskStore) clean() {
-	for len(d.currentFiles) > 0 && (len(d.currentFiles) > d.maxFiles || d.currentSize > d.maxBytes) {
-		f := d.currentFiles[0]
+	numDeleted := 0
+	for idx := range d.currentFiles {
+		if len(d.currentFiles)-numDeleted < d.maxFiles && d.currentSize < d.maxBytes {
+			break
+		}
+
+		f := d.currentFiles[idx]
 		log.Println("Removing", f.path)
 		if err := os.Remove(f.path); err != nil {
 			log.Println("Failed to remove file:", err)
 		}
-		d.currentFiles = d.currentFiles[1:]
 		d.currentSize -= f.size
+		numDeleted = idx + 1
 	}
+
+	// Compact currentFiles
+	copy(d.currentFiles, d.currentFiles[numDeleted:])
+	d.currentFiles = d.currentFiles[:len(d.currentFiles)-numDeleted]
+
 	var oldest time.Duration
 	if len(d.currentFiles) > 0 {
 		oldest = time.Since(time.Unix(d.currentFiles[0].mtime, 0)).Truncate(time.Minute)
@@ -157,7 +168,7 @@ func (d *diskStore) clean() {
 }
 
 func (d *diskStore) inventory() error {
-	d.currentFiles = nil
+	d.currentFiles = d.currentFiles[:0]
 	d.currentSize = 0
 	err := filepath.Walk(d.dir, func(path string, info os.FileInfo, err error) error {
 		if err != nil {
@@ -177,8 +188,8 @@ func (d *diskStore) inventory() error {
 		})
 		return nil
 	})
-	sort.Slice(d.currentFiles, func(i, j int) bool {
-		return d.currentFiles[i].mtime < d.currentFiles[j].mtime
+	slices.SortFunc(d.currentFiles, func(a, b currentFile) int {
+		return cmp.Compare(a.mtime, b.mtime)
 	})
 	var oldest time.Duration
 	if len(d.currentFiles) > 0 {

cmd/infra/stcrashreceiver/main.go

@@ -20,6 +20,7 @@ import (
 	"io"
 	"log"
 	"net/http"
+	"net/http/pprof"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -28,9 +29,8 @@ import (
 	"github.com/alecthomas/kong"
 	raven "github.com/getsentry/raven-go"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/build"
-	"github.com/syncthing/syncthing/lib/ur"
+	"github.com/syncthing/syncthing/lib/ur/contract"
 )
 
 const maxRequestSize = 1 << 20 // 1 MiB
@@ -44,7 +44,7 @@ type cli struct {
 	SentryQueue    int    `help:"Maximum number of reports to queue for sending to Sentry" default:"64" env:"SENTRY_QUEUE"`
 	DiskQueue      int    `help:"Maximum number of reports to queue for writing to disk" default:"64" env:"DISK_QUEUE"`
 	MetricsListen  string `help:"HTTP listen address for metrics" default:":8081" env:"METRICS_LISTEN_ADDRESS"`
-	IngorePatterns string `help:"File containing ignore patterns (regexp)" env:"IGNORE_PATTERNS" type:"existingfile"`
+	IgnorePatterns string `help:"File containing ignore patterns (regexp)" env:"IGNORE_PATTERNS" type:"existingfile"`
 }
 
 func main() {
@@ -68,9 +68,9 @@ func main() {
 	go ss.Serve(context.Background())
 
 	var ip *ignorePatterns
-	if params.IngorePatterns != "" {
+	if params.IgnorePatterns != "" {
 		var err error
-		ip, err = loadIgnorePatterns(params.IngorePatterns)
+		ip, err = loadIgnorePatterns(params.IgnorePatterns)
 		if err != nil {
 			log.Fatalf("Failed to load ignore patterns: %v", err)
 		}
@@ -90,6 +90,7 @@ func main() {
 	if params.MetricsListen != "" {
 		mmux := http.NewServeMux()
 		mmux.Handle("/metrics", promhttp.Handler())
+		mmux.HandleFunc("/debug/pprof/", pprof.Index)
 		go func() {
 			if err := http.ListenAndServe(params.MetricsListen, mmux); err != nil {
 				log.Fatalln("HTTP serve metrics:", err)
@@ -102,6 +103,8 @@ func main() {
 	}
 
 	log.SetOutput(os.Stdout)
+	log.Println(build.LongVersionFor("stcrashreceiver"))
+
 	if err := http.ListenAndServe(params.Listen, mux); err != nil {
 		log.Fatalln("HTTP serve:", err)
 	}
@@ -118,19 +121,20 @@ func handleFailureFn(dsn, failureDir string, ignore *ignorePatterns) func(w http
 		bs, err := io.ReadAll(lr)
 		req.Body.Close()
 		if err != nil {
-			http.Error(w, err.Error(), 500)
+			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
 
-		if ignore.match(bs) {
+		if pat, ok := ignore.match(bs); ok {
+			metricIgnoreMatchesTotal.WithLabelValues(pat).Inc()
 			result = "ignored"
 			return
 		}
 
-		var reports []ur.FailureReport
+		var reports []contract.FailureReport
 		err = json.Unmarshal(bs, &reports)
 		if err != nil {
-			http.Error(w, err.Error(), 400)
+			http.Error(w, err.Error(), http.StatusBadRequest)
 			return
 		}
 		if len(reports) == 0 {
@@ -141,7 +145,7 @@ func handleFailureFn(dsn, failureDir string, ignore *ignorePatterns) func(w http
 
 		version, err := build.ParseVersion(reports[0].Version)
 		if err != nil {
-			http.Error(w, err.Error(), 400)
+			http.Error(w, err.Error(), http.StatusBadRequest)
 			return
 		}
 		for _, r := range reports {
@@ -175,7 +179,7 @@ func handleFailureFn(dsn, failureDir string, ignore *ignorePatterns) func(w http
 	}
 }
 
-func saveFailureWithGoroutines(data ur.FailureData, failureDir string) (string, error) {
+func saveFailureWithGoroutines(data contract.FailureData, failureDir string) (string, error) {
 	bs := make([]byte, len(data.Description)+len(data.Goroutines))
 	copy(bs, data.Description)
 	copy(bs[len(data.Description):], data.Goroutines)
@@ -215,14 +219,14 @@ func loadIgnorePatterns(path string) (*ignorePatterns, error) {
 	return &ignorePatterns{patterns: patterns}, nil
 }
 
-func (i *ignorePatterns) match(report []byte) bool {
+func (i *ignorePatterns) match(report []byte) (string, bool) {
 	if i == nil {
-		return false
+		return "", false
 	}
 	for _, re := range i.patterns {
 		if re.Match(report) {
-			return true
+			return re.String(), true
 		}
 	}
-	return false
+	return "", false
 }

cmd/infra/stcrashreceiver/metrics.go

@@ -37,4 +37,24 @@ var (
 		Subsystem: "crashreceiver",
 		Name:      "diskstore_oldest_age_seconds",
 	})
+	metricSentryReportsTotal = promauto.NewCounterVec(prometheus.CounterOpts{
+		Namespace: "syncthing",
+		Subsystem: "crashreceiver",
+		Name:      "sentry_reports_total",
+	}, []string{"result"})
+	metricIgnoreMatchesTotal = promauto.NewCounterVec(prometheus.CounterOpts{
+		Namespace: "syncthing",
+		Subsystem: "crashreceiver",
+		Name:      "ignore_matches_total",
+	}, []string{"pattern"})
+	metricSourceCodeLoadsTotal = promauto.NewCounterVec(prometheus.CounterOpts{
+		Namespace: "syncthing",
+		Subsystem: "crashreceiver",
+		Name:      "source_code_loads_total",
+	}, []string{"result"})
+	metricSourceCodeCacheSize = promauto.NewGauge(prometheus.GaugeOpts{
+		Namespace: "syncthing",
+		Subsystem: "crashreceiver",
+		Name:      "source_code_cache_size",
+	})
 )

cmd/infra/stcrashreceiver/sentry.go

@@ -10,6 +10,7 @@ import (
 	"bytes"
 	"context"
 	"errors"
+	"fmt"
 	"io"
 	"log"
 	"regexp"
@@ -52,11 +53,15 @@ func (s *sentryService) Serve(ctx context.Context) {
 			pkt, err := parseCrashReport(req.reportID, req.data)
 			if err != nil {
 				log.Println("Failed to parse crash report:", err)
+				metricSentryReportsTotal.WithLabelValues("parse_failure").Inc()
 				continue
 			}
 			if err := sendReport(s.dsn, pkt, req.userID); err != nil {
 				log.Println("Failed to send crash report:", err)
+				metricSentryReportsTotal.WithLabelValues("send_failure").Inc()
+				continue
 			}
+			metricSentryReportsTotal.WithLabelValues("success").Inc()
 
 		case <-ctx.Done():
 			return
@@ -69,6 +74,7 @@ func (s *sentryService) Send(reportID, userID string, data []byte) bool {
 	case s.inbox <- sentryRequest{reportID, userID, data}:
 		return true
 	default:
+		metricCrashReportsTotal.WithLabelValues("overflow").Inc()
 		return false
 	}
 }
@@ -90,7 +96,7 @@ func sendReport(dsn string, pkt *raven.Packet, userID string) error {
 	}
 
 	// The client sets release and such on the packet before sending, in the
-	// misguided idea that it knows this better than than the packet we give
+	// misguided idea that it knows this better than the packet we give
 	// it. So we copy the values from the packet to the client first...
 	cli.SetRelease(pkt.Release)
 	cli.SetEnvironment(pkt.Environment)
@@ -108,11 +114,10 @@ func parseCrashReport(path string, report []byte) (*raven.Packet, error) {
 
 	version, err := build.ParseVersion(string(parts[0]))
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("%w in %q", err, parts[0])
 	}
 	report = parts[1]
 
-	foundPanic := false
 	var subjectLine []byte
 	for {
 		parts = bytes.SplitN(report, []byte("\n"), 2)
@@ -123,20 +128,15 @@ func parseCrashReport(path string, report []byte) (*raven.Packet, error) {
 		line := parts[0]
 		report = parts[1]
 
-		if foundPanic {
-			// The previous line was our "Panic at ..." header. We are now
-			// at the beginning of the real panic trace and this is our
-			// subject line.
+		if bytes.HasPrefix(line, []byte("panic:")) || bytes.HasPrefix(line, []byte("fatal error:")) {
 			subjectLine = line
 			break
-		} else if bytes.HasPrefix(line, []byte("Panic at")) {
-			foundPanic = true
 		}
 	}
 
 	r := bytes.NewReader(report)
 	ctx, _, err := stack.ScanSnapshot(r, io.Discard, stack.DefaultOpts())
-	if err != nil && err != io.EOF {
+	if err != nil && !errors.Is(err, io.EOF) {
 		return nil, err
 	}
 	if ctx == nil || len(ctx.Goroutines) == 0 {

cmd/infra/stcrashreceiver/sentry_test.go

@@ -9,26 +9,33 @@ package main
 import (
 	"fmt"
 	"os"
+	"path/filepath"
 	"testing"
 )
 
 func TestParseReport(t *testing.T) {
-	bs, err := os.ReadFile("_testdata/panic.log")
+	files, err := filepath.Glob("_testdata/*.log")
 	if err != nil {
 		t.Fatal(err)
 	}
+	for _, file := range files {
+		bs, err := os.ReadFile(file)
+		if err != nil {
+			t.Fatal(err)
+		}
 
-	pkt, err := parseCrashReport("1/2/345", bs)
-	if err != nil {
-		t.Fatal(err)
+		pkt, err := parseCrashReport("1/2/345", bs)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		bs, err = pkt.JSON()
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		fmt.Printf("%s\n", bs)
 	}
-
-	bs, err = pkt.JSON()
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	fmt.Printf("%s\n", bs)
 }
 
 func TestCrashReportFingerprint(t *testing.T) {

cmd/infra/stcrashreceiver/sourcecodeloader.go

@@ -15,23 +15,33 @@ import (
 	"strings"
 	"sync"
 	"time"
+
+	lru "github.com/hashicorp/golang-lru/v2"
 )
 
 const (
-	urlPrefix   = "https://raw.githubusercontent.com/syncthing/syncthing/"
-	httpTimeout = 10 * time.Second
+	urlPrefix       = "https://raw.githubusercontent.com/syncthing/syncthing/"
+	httpTimeout     = 10 * time.Second
+	maxCacheEntries = 1000
 )
 
+type cacheKey struct {
+	version string
+	file    string
+}
+
 type githubSourceCodeLoader struct {
 	mut     sync.Mutex
 	version string
-	cache   map[string]map[string][][]byte // version -> file -> lines
-	client  *http.Client
+
+	cache  *lru.TwoQueueCache[cacheKey, [][]byte] // version & file -> lines
+	client *http.Client
 }
 
 func newGithubSourceCodeLoader() *githubSourceCodeLoader {
+	cache, _ := lru.New2Q[cacheKey, [][]byte](maxCacheEntries)
 	return &githubSourceCodeLoader{
-		cache:  make(map[string]map[string][][]byte),
+		cache:  cache,
 		client: &http.Client{Timeout: httpTimeout},
 	}
 }
@@ -39,9 +49,6 @@ func newGithubSourceCodeLoader() *githubSourceCodeLoader {
 func (l *githubSourceCodeLoader) LockWithVersion(version string) {
 	l.mut.Lock()
 	l.version = version
-	if _, ok := l.cache[version]; !ok {
-		l.cache[version] = make(map[string][][]byte)
-	}
 }
 
 func (l *githubSourceCodeLoader) Unlock() {
@@ -50,11 +57,13 @@ func (l *githubSourceCodeLoader) Unlock() {
 
 func (l *githubSourceCodeLoader) Load(filename string, line, context int) ([][]byte, int) {
 	filename = filepath.ToSlash(filename)
-	lines, ok := l.cache[l.version][filename]
+	key := cacheKey{version: l.version, file: filename}
+	lines, ok := l.cache.Get(key)
 	if !ok {
 		// Cache whatever we managed to find (or nil if nothing, so we don't try again)
 		defer func() {
-			l.cache[l.version][filename] = lines
+			l.cache.Add(key, lines)
+			metricSourceCodeCacheSize.Set(float64(l.cache.Len()))
 		}()
 
 		knownPrefixes := []string{"/lib/", "/cmd/"}
@@ -73,19 +82,25 @@ func (l *githubSourceCodeLoader) Load(filename string, line, context int) ([][]b
 		resp, err := l.client.Get(url)
 		if err != nil {
 			fmt.Println("Loading source:", err)
+			metricSourceCodeLoadsTotal.WithLabelValues("failed").Inc()
 			return nil, 0
 		}
 		if resp.StatusCode != http.StatusOK {
 			fmt.Println("Loading source:", resp.Status)
+			metricSourceCodeLoadsTotal.WithLabelValues("failed").Inc()
 			return nil, 0
 		}
 		data, err := io.ReadAll(resp.Body)
 		_ = resp.Body.Close()
 		if err != nil {
 			fmt.Println("Loading source:", err.Error())
+			metricSourceCodeLoadsTotal.WithLabelValues("failed").Inc()
 			return nil, 0
 		}
 		lines = bytes.Split(data, []byte{'\n'})
+		metricSourceCodeLoadsTotal.WithLabelValues("loaded").Inc()
+	} else {
+		metricSourceCodeLoadsTotal.WithLabelValues("cached").Inc()
 	}
 
 	return getLineFromLines(lines, line, context)

cmd/infra/stcrashreceiver/stcrashreceiver.go

@@ -7,21 +7,18 @@
 package main
 
 import (
+	"bytes"
 	"io"
 	"log"
 	"net/http"
 	"path"
 	"strings"
-	"sync"
 )
 
 type crashReceiver struct {
 	store  *diskStore
 	sentry *sentryService
 	ignore *ignorePatterns
-
-	ignoredMut sync.RWMutex
-	ignored    map[string]struct{}
 }
 
 func (r *crashReceiver) ServeHTTP(w http.ResponseWriter, req *http.Request) {
@@ -69,12 +66,6 @@ func (r *crashReceiver) serveGet(reportID string, w http.ResponseWriter, _ *http
 // serveHead responds to HEAD requests by checking if the named report
 // already exists in the system.
 func (r *crashReceiver) serveHead(reportID string, w http.ResponseWriter, _ *http.Request) {
-	r.ignoredMut.RLock()
-	_, ignored := r.ignored[reportID]
-	r.ignoredMut.RUnlock()
-	if ignored {
-		return // found
-	}
 	if !r.store.Exists(reportID) {
 		http.Error(w, "Not found", http.StatusNotFound)
 	}
@@ -87,17 +78,7 @@ func (r *crashReceiver) servePut(reportID string, w http.ResponseWriter, req *ht
 		metricCrashReportsTotal.WithLabelValues(result).Inc()
 	}()
 
-	r.ignoredMut.RLock()
-	_, ignored := r.ignored[reportID]
-	r.ignoredMut.RUnlock()
-	if ignored {
-		result = "ignored_cached"
-		io.Copy(io.Discard, req.Body)
-		return // found
-	}
-
 	// Read at most maxRequestSize of report data.
-	log.Println("Receiving report", reportID)
 	lr := io.LimitReader(req.Body, maxRequestSize)
 	bs, err := io.ReadAll(lr)
 	if err != nil {
@@ -106,14 +87,12 @@ func (r *crashReceiver) servePut(reportID string, w http.ResponseWriter, req *ht
 		return
 	}
 
-	if r.ignore.match(bs) {
-		r.ignoredMut.Lock()
-		if r.ignored == nil {
-			r.ignored = make(map[string]struct{})
-		}
-		r.ignored[reportID] = struct{}{}
-		r.ignoredMut.Unlock()
+	first := string(bytes.TrimSpace(bytes.Split(bs, []byte("\n"))[0]))
+
+	if pat, ok := r.ignore.match(bs); ok {
+		metricIgnoreMatchesTotal.WithLabelValues(pat).Inc()
 		result = "ignored"
+		log.Printf("Ignored report %s, matched: %s (%s)", reportID[:8], pat, first)
 		return
 	}
 
@@ -121,13 +100,15 @@ func (r *crashReceiver) servePut(reportID string, w http.ResponseWriter, req *ht
 
 	// Store the report
 	if !r.store.Put(reportID, bs) {
-		log.Println("Failed to store report (queue full):", reportID)
+		log.Println("Failed to store report (queue full):", reportID[:8])
 		result = "queue_failure"
 	}
 
 	// Send the report to Sentry
 	if !r.sentry.Send(reportID, userIDFor(req), bs) {
-		log.Println("Failed to send report to sentry (queue full):", reportID)
+		log.Println("Failed to send report to sentry (queue full):", reportID[:8])
 		result = "sentry_failure"
 	}
+
+	log.Printf("Received report %s (%s)", reportID[:8], first)
 }

cmd/infra/stcrashreceiver/util.go

@@ -10,7 +10,7 @@ import (
 	"bytes"
 	"compress/gzip"
 	"crypto/sha256"
-	"fmt"
+	"encoding/hex"
 	"net"
 	"net/http"
 	"os"
@@ -23,7 +23,7 @@ import (
 // remote IP, and the current month.
 func userIDFor(req *http.Request) string {
 	addr := req.RemoteAddr
-	if fwd := req.Header.Get("x-forwarded-for"); fwd != "" {
+	if fwd := req.Header.Get("X-Forwarded-For"); fwd != "" {
 		addr = fwd
 	}
 	if host, _, err := net.SplitHostPort(addr); err == nil {
@@ -32,7 +32,7 @@ func userIDFor(req *http.Request) string {
 	now := time.Now().Format("200601")
 	salt := "stcrashreporter"
 	hash := sha256.Sum256([]byte(salt + addr + now))
-	return fmt.Sprintf("%x", hash[:8])
+	return hex.EncodeToString(hash[:8])
 }
 
 // 01234567890abcdef... => 01/23

cmd/infra/strelaypoolsrv/gui/index.html

@@ -193,7 +193,7 @@
     </div>
 
 
-    <script type="text/javascript" src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
+    <script type="text/javascript" src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
     <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular.min.js"></script>
     <script type="text/javascript" src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
   </body>

cmd/infra/strelaypoolsrv/main.go

@@ -17,6 +17,7 @@ import (
 	"path/filepath"
 	"strconv"
 	"strings"
+	"sync"
 	"sync/atomic"
 	"time"
 
@@ -26,11 +27,11 @@ import (
 
 	"github.com/syncthing/syncthing/cmd/infra/strelaypoolsrv/auto"
 	"github.com/syncthing/syncthing/lib/assets"
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
+	"github.com/syncthing/syncthing/lib/build"
 	"github.com/syncthing/syncthing/lib/geoip"
 	"github.com/syncthing/syncthing/lib/protocol"
+	"github.com/syncthing/syncthing/lib/rand"
 	"github.com/syncthing/syncthing/lib/relay/client"
-	"github.com/syncthing/syncthing/lib/sync"
 	"github.com/syncthing/syncthing/lib/tlsutil"
 )
 
@@ -110,10 +111,11 @@ var (
 	requestProcessors = 8
 	geoipLicenseKey   = os.Getenv("GEOIP_LICENSE_KEY")
 	geoipAccountID, _ = strconv.Atoi(os.Getenv("GEOIP_ACCOUNT_ID"))
+	maxRelaysReturned = 100
 
 	requests chan request
 
-	mut             = sync.NewRWMutex()
+	mut             sync.RWMutex
 	knownRelays     = make([]*relay, 0)
 	permanentRelays = make([]*relay, 0)
 	evictionTimers  = make(map[string]*time.Timer)
@@ -141,9 +143,12 @@ func main() {
 	flag.IntVar(&requestQueueLen, "request-queue", requestQueueLen, "Queue length for incoming test requests")
 	flag.IntVar(&requestProcessors, "request-processors", requestProcessors, "Number of request processor routines")
 	flag.StringVar(&geoipLicenseKey, "geoip-license-key", geoipLicenseKey, "License key for GeoIP database")
+	flag.IntVar(&maxRelaysReturned, "max-relays-returned", maxRelaysReturned, "Maximum number of relays returned for a normal endpoint query")
 
 	flag.Parse()
 
+	log.Println(build.LongVersionFor("strelaypoolsrv"))
+
 	requests = make(chan request, requestQueueLen)
 	geoip, err := geoip.NewGeoLite2CityProvider(context.Background(), geoipAccountID, geoipLicenseKey, os.TempDir())
 	if err != nil {
@@ -159,7 +164,7 @@ func main() {
 
 	testCert = createTestCertificate()
 
-	for i := 0; i < requestProcessors; i++ {
+	for range requestProcessors {
 		go requestProcessor(geoip)
 	}
 
@@ -177,7 +182,7 @@ func main() {
 				relayTestsTotal.WithLabelValues("success").Inc()
 			}
 		}
-		// Run the the stats refresher once the relays are loaded.
+		// Run the stats refresher once the relays are loaded.
 		statsRefresher(statsRefresh)
 	}()
 
@@ -331,6 +336,10 @@ func handleEndpointShort(rw http.ResponseWriter, r *http.Request) {
 		relays = append(relays, relayShort{URL: slimURL(r.URL)})
 	}
 	mut.RUnlock()
+	if len(relays) > maxRelaysReturned {
+		rand.Shuffle(relays)
+		relays = relays[:maxRelaysReturned]
+	}
 
 	_ = json.NewEncoder(rw).Encode(map[string][]relayShort{
 		"relays": relays,
@@ -419,7 +428,7 @@ func handleRegister(w http.ResponseWriter, r *http.Request) {
 		newRelay.URL = uri.String()
 	} else if host != rhost && relayCert == nil {
 		if debug {
-			log.Println("IP address advertised does not match client IP address", r.RemoteAddr, uri)
+			log.Println("IP address advertised does not match client IP address", rhost, uri)
 		}
 		http.Error(w, fmt.Sprintf("IP advertised %s does not match client IP %s", host, rhost), http.StatusUnauthorized)
 		return
@@ -443,13 +452,13 @@ func handleRegister(w http.ResponseWriter, r *http.Request) {
 	case requests <- request{&newRelay, reschan, prometheus.NewTimer(relayTestActionsSeconds.WithLabelValues("queue"))}:
 		result := <-reschan
 		if result.err != nil {
-			log.Println("Join from", r.RemoteAddr, "failed:", result.err)
+			log.Println("Join from", rhost, "failed:", result.err)
 			globalBlocklist.AddError(rhost)
 			relayTestsTotal.WithLabelValues("failed").Inc()
 			http.Error(w, result.err.Error(), http.StatusBadRequest)
 			return
 		}
-		log.Println("Join from", r.RemoteAddr, "succeeded")
+		log.Println("Join from", rhost, "succeeded")
 		globalBlocklist.ClearErrors(rhost)
 		relayTestsTotal.WithLabelValues("success").Inc()
 		w.Header().Set("Content-Type", "application/json; charset=utf-8")
@@ -613,7 +622,7 @@ func createTestCertificate() tls.Certificate {
 	}
 
 	certFile, keyFile := filepath.Join(tmpDir, "cert.pem"), filepath.Join(tmpDir, "key.pem")
-	cert, err := tlsutil.NewCertificate(certFile, keyFile, "relaypoolsrv", 20*365)
+	cert, err := tlsutil.NewCertificate(certFile, keyFile, "relaypoolsrv", 20*365, false)
 	if err != nil {
 		log.Fatalln("Failed to create test X509 key pair:", err)
 	}
@@ -646,6 +655,7 @@ func getLocation(host string, geoip *geoip.Provider) location {
 
 type loggingResponseWriter struct {
 	http.ResponseWriter
+
 	statusCode int
 }
 

cmd/infra/strelaypoolsrv/main_test.go

@@ -13,7 +13,6 @@ import (
 	"net/http/httptest"
 	"net/url"
 	"strings"
-	"sync"
 	"testing"
 )
 
@@ -28,8 +27,6 @@ func init() {
 		{URL: "known2"},
 		{URL: "known3"},
 	}
-
-	mut = new(sync.RWMutex)
 }
 
 // Regression test: handleGetRequest should not modify permanentRelays.

cmd/infra/strelaypoolsrv/stats.go

@@ -6,10 +6,10 @@ import (
 	"encoding/json"
 	"net"
 	"net/http"
+	"sync"
 	"time"
 
 	"github.com/prometheus/client_golang/prometheus"
-	"github.com/syncthing/syncthing/lib/sync"
 )
 
 var (
@@ -104,12 +104,11 @@ func refreshStats() {
 	mut.RUnlock()
 
 	now := time.Now()
-	wg := sync.NewWaitGroup()
+	var wg sync.WaitGroup
 
 	results := make(chan statsFetchResult, len(relays))
 	for _, rel := range relays {
-		wg.Add(1)
-		go func(rel *relay) {
+		wg.Go(func() {
 			t0 := time.Now()
 			stats := fetchStats(rel)
 			duration := time.Since(t0).Seconds()
@@ -123,8 +122,7 @@ func refreshStats() {
 				relay: rel,
 				stats: fetchStats(rel),
 			}
-			wg.Done()
-		}(rel)
+		})
 	}
 
 	wg.Wait()
@@ -173,7 +171,7 @@ func fetchStats(relay *relay) *stats {
 
 	var stats stats
 
-	if json.NewDecoder(response.Body).Decode(&stats); err != nil {
+	if err := json.NewDecoder(response.Body).Decode(&stats); err != nil {
 		return nil
 	}
 	return &stats

cmd/infra/stupgrades/main.go

@@ -24,7 +24,8 @@ import (
 
 	"github.com/alecthomas/kong"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
+	"github.com/syncthing/syncthing/internal/slogutil"
+	"github.com/syncthing/syncthing/lib/build"
 	"github.com/syncthing/syncthing/lib/httpcache"
 	"github.com/syncthing/syncthing/lib/upgrade"
 )
@@ -44,6 +45,8 @@ func main() {
 		Level: slog.LevelInfo,
 	})))
 
+	slog.Info(build.LongVersionFor("stupgrades"))
+
 	if err := server(&params); err != nil {
 		fmt.Printf("Error: %v\n", err)
 		os.Exit(1)
@@ -58,10 +61,10 @@ func server(params *cli) error {
 		if err != nil {
 			return fmt.Errorf("metrics: %w", err)
 		}
-		slog.Info("Metrics listener started", "addr", params.MetricsListen)
+		slog.Info("Metrics listener started", slogutil.Address(params.MetricsListen))
 		go func() {
 			if err := http.Serve(metricsListen, mux); err != nil {
-				slog.Warn("Metrics server returned", "error", err)
+				slog.Warn("Metrics server returned", slogutil.Error(err))
 			}
 		}()
 	}
@@ -75,9 +78,9 @@ func server(params *cli) error {
 
 	go func() {
 		for range time.NewTicker(params.CacheTime).C {
-			slog.Info("Refreshing cached releases", "url", params.URL)
+			slog.Info("Refreshing cached releases", slogutil.URI(params.URL))
 			if err := cache.Update(context.Background()); err != nil {
-				slog.Error("Failed to refresh cached releases", "url", params.URL, "error", err)
+				slog.Error("Failed to refresh cached releases", slogutil.URI(params.URL), slogutil.Error(err))
 			}
 		}
 	}()
@@ -109,7 +112,7 @@ func server(params *cli) error {
 	if err != nil {
 		return fmt.Errorf("listen: %w", err)
 	}
-	slog.Info("Main listener started", "addr", params.Listen)
+	slog.Info("Main listener started", slogutil.Address(params.Listen))
 
 	return srv.Serve(srvListener)
 }
@@ -137,7 +140,7 @@ func (p *githubReleases) serveReleases(w http.ResponseWriter, req *http.Request)
 	osv := req.Header.Get("Syncthing-Os-Version")
 	if ua != "" && osv != "" {
 		// We should determine the compatibility of the releases.
-		rels = filterForCompabitility(rels, ua, osv)
+		rels = filterForCompatibility(rels, ua, osv)
 	} else {
 		metricFilterCalls.WithLabelValues("no-ua-or-osversion").Inc()
 	}
@@ -201,17 +204,21 @@ func (p *proxy) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 // looking for a prerelease at all.
 func filterForLatest(rels []upgrade.Release) []upgrade.Release {
 	var filtered []upgrade.Release
-	var havePre bool
+	havePre := make(map[string]bool)
+	haveStable := make(map[string]bool)
 	for _, rel := range rels {
-		if !rel.Prerelease {
-			// We found a stable version, we're good now.
+		major, _, _ := strings.Cut(rel.Tag, ".")
+		if !rel.Prerelease && !haveStable[major] {
+			// Remember the first non-pre for each major
 			filtered = append(filtered, rel)
-			break
+			haveStable[major] = true
+			continue
 		}
-		if rel.Prerelease && !havePre {
-			// We remember the first prerelease we find.
+		if rel.Prerelease && !havePre[major] && !haveStable[major] {
+			// We remember the first prerelease we find, unless we've
+			// already found a non-pre of the same major.
 			filtered = append(filtered, rel)
-			havePre = true
+			havePre[major] = true
 		}
 	}
 	return filtered
@@ -219,7 +226,7 @@ func filterForLatest(rels []upgrade.Release) []upgrade.Release {
 
 var userAgentOSArchExp = regexp.MustCompile(`^syncthing.*\(.+ (\w+)-(\w+)\)$`)
 
-func filterForCompabitility(rels []upgrade.Release, ua, osv string) []upgrade.Release {
+func filterForCompatibility(rels []upgrade.Release, ua, osv string) []upgrade.Release {
 	osArch := userAgentOSArchExp.FindStringSubmatch(ua)
 	if len(osArch) != 3 {
 		metricFilterCalls.WithLabelValues("bad-os-arch").Inc()
@@ -258,9 +265,10 @@ func filterForCompabitility(rels []upgrade.Release, ua, osv string) []upgrade.Re
 }
 
 type cachedReleases struct {
-	url     string
-	mut     sync.RWMutex
-	current []upgrade.Release
+	url                  string
+	mut                  sync.RWMutex
+	current              []upgrade.Release
+	latestRel, latestPre string
 }
 
 func (c *cachedReleases) Releases() []upgrade.Release {
@@ -274,8 +282,26 @@ func (c *cachedReleases) Update(ctx context.Context) error {
 	if err != nil {
 		return err
 	}
+	latestRel, latestPre := "", ""
+	for _, rel := range rels {
+		if !rel.Prerelease && latestRel == "" {
+			latestRel = rel.Tag
+		}
+		if rel.Prerelease && latestPre == "" {
+			latestPre = rel.Tag
+		}
+		if latestRel != "" && latestPre != "" {
+			break
+		}
+	}
 	c.mut.Lock()
 	c.current = rels
+	if latestRel != c.latestRel || latestPre != c.latestPre {
+		metricLatestReleaseInfo.DeleteLabelValues(c.latestRel, c.latestPre)
+		metricLatestReleaseInfo.WithLabelValues(latestRel, latestPre).Set(1)
+		c.latestRel = latestRel
+		c.latestPre = latestPre
+	}
 	c.mut.Unlock()
 	return nil
 }

cmd/infra/stupgrades/metrics.go

@@ -27,4 +27,10 @@ var (
 		Subsystem: "upgrade",
 		Name:      "http_requests",
 	}, []string{"target", "result"})
+	metricLatestReleaseInfo = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: "syncthing",
+		Subsystem: "upgrade",
+		Name:      "latest_release_info",
+		Help:      "Release information",
+	}, []string{"latest_release", "latest_pre"})
 )

cmd/infra/ursrv/main.go

@@ -13,7 +13,7 @@ import (
 
 	"github.com/alecthomas/kong"
 	"github.com/syncthing/syncthing/cmd/infra/ursrv/serve"
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
+	"github.com/syncthing/syncthing/lib/build"
 )
 
 type CLI struct {
@@ -25,6 +25,8 @@ func main() {
 		Level: slog.LevelInfo,
 	})))
 
+	slog.Info(build.LongVersionFor("ursrv"))
+
 	var cli CLI
 	ctx := kong.Parse(&cli)
 	if err := ctx.Run(); err != nil {

cmd/infra/ursrv/serve/metrics.go

@@ -32,6 +32,21 @@ var (
 		Subsystem: "ursrv_v2",
 		Name:      "collect_seconds_last",
 	})
+	metricsRecalcsTotal = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: "syncthing",
+		Subsystem: "ursrv_v2",
+		Name:      "recalcs_total",
+	})
+	metricsRecalcSecondsTotal = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: "syncthing",
+		Subsystem: "ursrv_v2",
+		Name:      "recalc_seconds_total",
+	})
+	metricsRecalcSecondsLast = promauto.NewGauge(prometheus.GaugeOpts{
+		Namespace: "syncthing",
+		Subsystem: "ursrv_v2",
+		Name:      "recalc_seconds_last",
+	})
 	metricsWriteSecondsLast = promauto.NewGauge(prometheus.GaugeOpts{
 		Namespace: "syncthing",
 		Subsystem: "ursrv_v2",

cmd/infra/ursrv/serve/prometheus.go

@@ -7,6 +7,9 @@
 package serve
 
 import (
+	"context"
+	"fmt"
+	"log/slog"
 	"reflect"
 	"slices"
 	"strconv"
@@ -28,7 +31,7 @@ type metricsSet struct {
 	gaugeVecLabels map[string][]string
 	summaries      map[string]*metricSummary
 
-	collectMut    sync.Mutex
+	collectMut    sync.RWMutex
 	collectCutoff time.Duration
 }
 
@@ -44,7 +47,7 @@ func newMetricsSet(srv *server) *metricsSet {
 
 	var initForType func(reflect.Type)
 	initForType = func(t reflect.Type) {
-		for i := 0; i < t.NumField(); i++ {
+		for i := range t.NumField() {
 			field := t.Field(i)
 			if field.Type.Kind() == reflect.Struct {
 				initForType(field.Type)
@@ -108,6 +111,60 @@ func nameConstLabels(name string) (string, prometheus.Labels) {
 	return name, m
 }
 
+func (s *metricsSet) Serve(ctx context.Context) error {
+	s.recalc()
+
+	const recalcInterval = 5 * time.Minute
+	next := time.Until(time.Now().Truncate(recalcInterval).Add(recalcInterval))
+	recalcTimer := time.NewTimer(next)
+	defer recalcTimer.Stop()
+
+	for {
+		select {
+		case <-recalcTimer.C:
+			s.recalc()
+			next := time.Until(time.Now().Truncate(recalcInterval).Add(recalcInterval))
+			recalcTimer.Reset(next)
+		case <-ctx.Done():
+			return ctx.Err()
+		}
+	}
+}
+
+func (s *metricsSet) recalc() {
+	s.collectMut.Lock()
+	defer s.collectMut.Unlock()
+
+	t0 := time.Now()
+	defer func() {
+		dur := time.Since(t0)
+		slog.Info("Metrics recalculated", "d", dur.String())
+		metricsRecalcSecondsLast.Set(dur.Seconds())
+		metricsRecalcSecondsTotal.Add(dur.Seconds())
+		metricsRecalcsTotal.Inc()
+	}()
+
+	for _, g := range s.gauges {
+		g.Set(0)
+	}
+	for _, g := range s.gaugeVecs {
+		g.Reset()
+	}
+	for _, g := range s.summaries {
+		g.Reset()
+	}
+
+	cutoff := time.Now().Add(s.collectCutoff)
+	s.srv.reports.Range(func(key string, r *contract.Report) bool {
+		if s.collectCutoff < 0 && r.Received.Before(cutoff) {
+			s.srv.reports.Delete(key)
+			return true
+		}
+		s.addReport(r)
+		return true
+	})
+}
+
 func (s *metricsSet) addReport(r *contract.Report) {
 	gaugeVecs := make(map[string][]string)
 	s.addReportStruct(reflect.ValueOf(r).Elem(), gaugeVecs)
@@ -118,7 +175,7 @@ func (s *metricsSet) addReport(r *contract.Report) {
 
 func (s *metricsSet) addReportStruct(v reflect.Value, gaugeVecs map[string][]string) {
 	t := v.Type()
-	for i := 0; i < v.NumField(); i++ {
+	for i := range v.NumField() {
 		field := v.Field(i)
 		if field.Kind() == reflect.Struct {
 			s.addReportStruct(field, gaugeVecs)
@@ -198,8 +255,8 @@ func (s *metricsSet) Describe(c chan<- *prometheus.Desc) {
 }
 
 func (s *metricsSet) Collect(c chan<- prometheus.Metric) {
-	s.collectMut.Lock()
-	defer s.collectMut.Unlock()
+	s.collectMut.RLock()
+	defer s.collectMut.RUnlock()
 
 	t0 := time.Now()
 	defer func() {
@@ -209,26 +266,6 @@ func (s *metricsSet) Collect(c chan<- prometheus.Metric) {
 		metricsCollectsTotal.Inc()
 	}()
 
-	for _, g := range s.gauges {
-		g.Set(0)
-	}
-	for _, g := range s.gaugeVecs {
-		g.Reset()
-	}
-	for _, g := range s.summaries {
-		g.Reset()
-	}
-
-	cutoff := time.Now().Add(s.collectCutoff)
-	s.srv.reports.Range(func(key string, r *contract.Report) bool {
-		if s.collectCutoff < 0 && r.Received.Before(cutoff) {
-			s.srv.reports.Delete(key)
-			return true
-		}
-		s.addReport(r)
-		return true
-	})
-
 	for _, g := range s.gauges {
 		c <- g
 	}
@@ -299,12 +336,12 @@ func (q *metricSummary) Collect(c chan<- prometheus.Metric) {
 		}
 
 		slices.Sort(vs)
-		c <- prometheus.MustNewConstMetric(q.qDesc, prometheus.GaugeValue, vs[0], append(labelVals, "0")...)
-		c <- prometheus.MustNewConstMetric(q.qDesc, prometheus.GaugeValue, vs[len(vs)*5/100], append(labelVals, "0.05")...)
-		c <- prometheus.MustNewConstMetric(q.qDesc, prometheus.GaugeValue, vs[len(vs)/2], append(labelVals, "0.5")...)
-		c <- prometheus.MustNewConstMetric(q.qDesc, prometheus.GaugeValue, vs[len(vs)*9/10], append(labelVals, "0.9")...)
-		c <- prometheus.MustNewConstMetric(q.qDesc, prometheus.GaugeValue, vs[len(vs)*95/100], append(labelVals, "0.95")...)
-		c <- prometheus.MustNewConstMetric(q.qDesc, prometheus.GaugeValue, vs[len(vs)-1], append(labelVals, "1")...)
+
+		pctiles := []float64{0, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 0.75, 0.9, 0.95, 0.975, 0.99, 1}
+		for _, pct := range pctiles {
+			idx := int(float64(len(vs)-1) * pct)
+			c <- prometheus.MustNewConstMetric(q.qDesc, prometheus.GaugeValue, vs[idx], append(labelVals, fmt.Sprint(pct))...)
+		}
 	}
 }
 

cmd/infra/ursrv/serve/serve.go

@@ -26,10 +26,13 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/puzpuzpuz/xsync/v3"
+	"github.com/syncthing/syncthing/internal/blob"
+	"github.com/syncthing/syncthing/internal/blob/s3"
+	"github.com/syncthing/syncthing/internal/slogutil"
 	"github.com/syncthing/syncthing/lib/build"
 	"github.com/syncthing/syncthing/lib/geoip"
-	"github.com/syncthing/syncthing/lib/s3"
 	"github.com/syncthing/syncthing/lib/ur/contract"
+	"github.com/thejerf/suture/v4"
 )
 
 type CLI struct {
@@ -40,11 +43,11 @@ type CLI struct {
 	DumpFile        string        `env:"UR_DUMP_FILE" default:"reports.jsons.gz"`
 	DumpInterval    time.Duration `env:"UR_DUMP_INTERVAL" default:"5m"`
 
-	S3Endpoint    string `name:"s3-endpoint" hidden:"true" env:"UR_S3_ENDPOINT"`
-	S3Region      string `name:"s3-region" hidden:"true" env:"UR_S3_REGION"`
-	S3Bucket      string `name:"s3-bucket" hidden:"true" env:"UR_S3_BUCKET"`
-	S3AccessKeyID string `name:"s3-access-key-id" hidden:"true" env:"UR_S3_ACCESS_KEY_ID"`
-	S3SecretKey   string `name:"s3-secret-key" hidden:"true" env:"UR_S3_SECRET_KEY"`
+	S3Endpoint    string `name:"s3-endpoint" env:"UR_S3_ENDPOINT"`
+	S3Region      string `name:"s3-region" env:"UR_S3_REGION"`
+	S3Bucket      string `name:"s3-bucket" env:"UR_S3_BUCKET"`
+	S3AccessKeyID string `name:"s3-access-key-id" env:"UR_S3_ACCESS_KEY_ID"`
+	S3SecretKey   string `name:"s3-secret-key" env:"UR_S3_SECRET_KEY"`
 }
 
 var (
@@ -71,12 +74,14 @@ var (
 		{regexp.MustCompile(`\svagrant@bullseye`), "F-Droid"},
 		{regexp.MustCompile(`\svagrant@bookworm`), "F-Droid"},
 
-		{regexp.MustCompile(`Anwender@NET2017`), "Syncthing-Fork (3rd party)"},
+		{regexp.MustCompile(`\sreproducible-build@Catfriend1-syncthing-android`), "Syncthing-Fork Catfriend1 (3rd party)"},
+		{regexp.MustCompile(`\sreproducible-build@nel0x-syncthing-android-gplay`), "Syncthing-Fork nel0x (3rd party)"},
 
 		{regexp.MustCompile(`\sbuilduser@(archlinux|svetlemodry)`), "Arch (3rd party)"},
 		{regexp.MustCompile(`\ssyncthing@archlinux`), "Arch (3rd party)"},
 		{regexp.MustCompile(`@debian`), "Debian (3rd party)"},
 		{regexp.MustCompile(`@fedora`), "Fedora (3rd party)"},
+		{regexp.MustCompile(`@openSUSE`), "openSUSE (3rd party)"},
 		{regexp.MustCompile(`\sbrew@`), "Homebrew (3rd party)"},
 		{regexp.MustCompile(`\sroot@buildkitsandbox`), "LinuxServer.io (3rd party)"},
 		{regexp.MustCompile(`\sports@freebsd`), "FreeBSD (3rd party)"},
@@ -97,42 +102,42 @@ func (cli *CLI) Run() error {
 
 	urListener, err := net.Listen("tcp", cli.Listen)
 	if err != nil {
-		slog.Error("Failed to listen (usage reports)", "error", err)
+		slog.Error("Failed to listen (usage reports)", slogutil.Error(err))
 		return err
 	}
-	slog.Info("Listening (usage reports)", "address", urListener.Addr())
+	slog.Info("Listening (usage reports)", slogutil.Address(urListener.Addr()))
 
 	internalListener, err := net.Listen("tcp", cli.ListenInternal)
 	if err != nil {
-		slog.Error("Failed to listen (internal)", "error", err)
+		slog.Error("Failed to listen (internal)", slogutil.Error(err))
 		return err
 	}
-	slog.Info("Listening (internal)", "address", internalListener.Addr())
+	slog.Info("Listening (internal)", slogutil.Address(internalListener.Addr()))
 
 	var geo *geoip.Provider
 	if cli.GeoIPAccountID != 0 && cli.GeoIPLicenseKey != "" {
 		geo, err = geoip.NewGeoLite2CityProvider(context.Background(), cli.GeoIPAccountID, cli.GeoIPLicenseKey, os.TempDir())
 		if err != nil {
-			slog.Error("Failed to load GeoIP", "error", err)
+			slog.Error("Failed to load GeoIP", slogutil.Error(err))
 			return err
 		}
 		go geo.Serve(context.TODO())
 	}
 
-	// s3
+	// Blob storage
 
-	var s3sess *s3.Session
+	var blobs blob.Store
 	if cli.S3Endpoint != "" {
-		s3sess, err = s3.NewSession(cli.S3Endpoint, cli.S3Region, cli.S3Bucket, cli.S3AccessKeyID, cli.S3SecretKey)
+		blobs, err = s3.NewSession(cli.S3Endpoint, cli.S3Region, cli.S3Bucket, cli.S3AccessKeyID, cli.S3SecretKey)
 		if err != nil {
-			slog.Error("Failed to create S3 session", "error", err)
+			slog.Error("Failed to create S3 session", slogutil.Error(err))
 			return err
 		}
 	}
 
-	if _, err := os.Stat(cli.DumpFile); err != nil && s3sess != nil {
-		if err := cli.downloadDumpFile(s3sess); err != nil {
-			slog.Error("Failed to download dump file", "error", err)
+	if _, err := os.Stat(cli.DumpFile); err != nil && blobs != nil {
+		if err := cli.downloadDumpFile(blobs); err != nil {
+			slog.Error("Failed to download dump file", slogutil.Error(err))
 		}
 	}
 
@@ -153,8 +158,8 @@ func (cli *CLI) Run() error {
 
 	go func() {
 		for range time.Tick(cli.DumpInterval) {
-			if err := cli.saveDumpFile(srv, s3sess); err != nil {
-				slog.Error("Failed to write dump file", "error", err)
+			if err := cli.saveDumpFile(srv, blobs); err != nil {
+				slog.Error("Failed to write dump file", slogutil.Error(err))
 			}
 		}
 	}()
@@ -173,7 +178,12 @@ func (cli *CLI) Run() error {
 	// New external metrics endpoint accepts reports from clients and serves
 	// aggregated usage reporting metrics.
 
+	main := suture.NewSimple("main")
+	main.ServeBackground(context.Background())
+
 	ms := newMetricsSet(srv)
+	main.Add(ms)
+
 	reg := prometheus.NewRegistry()
 	reg.MustRegister(ms)
 
@@ -184,7 +194,7 @@ func (cli *CLI) Run() error {
 
 	metricsSrv := http.Server{
 		ReadTimeout:  5 * time.Second,
-		WriteTimeout: 15 * time.Second,
+		WriteTimeout: 60 * time.Second,
 		Handler:      mux,
 	}
 
@@ -192,8 +202,8 @@ func (cli *CLI) Run() error {
 	return metricsSrv.Serve(urListener)
 }
 
-func (cli *CLI) downloadDumpFile(s3sess *s3.Session) error {
-	latestKey, err := s3sess.LatestKey()
+func (cli *CLI) downloadDumpFile(blobs blob.Store) error {
+	latestKey, err := blobs.LatestKey(context.Background())
 	if err != nil {
 		return fmt.Errorf("list latest S3 key: %w", err)
 	}
@@ -201,7 +211,7 @@ func (cli *CLI) downloadDumpFile(s3sess *s3.Session) error {
 	if err != nil {
 		return fmt.Errorf("create dump file: %w", err)
 	}
-	if err := s3sess.Download(fd, latestKey); err != nil {
+	if err := blobs.Download(context.Background(), latestKey, fd); err != nil {
 		_ = fd.Close()
 		return fmt.Errorf("download dump file: %w", err)
 	}
@@ -212,7 +222,12 @@ func (cli *CLI) downloadDumpFile(s3sess *s3.Session) error {
 	return nil
 }
 
-func (cli *CLI) saveDumpFile(srv *server, s3sess *s3.Session) error {
+func (cli *CLI) saveDumpFile(srv *server, blobs blob.Store) error {
+	t0 := time.Now()
+	defer func() {
+		metricsWriteSecondsLast.Set(float64(time.Since(t0)))
+	}()
+
 	fd, err := os.Create(cli.DumpFile + ".tmp")
 	if err != nil {
 		return fmt.Errorf("creating dump file: %w", err)
@@ -231,19 +246,20 @@ func (cli *CLI) saveDumpFile(srv *server, s3sess *s3.Session) error {
 	if err := os.Rename(cli.DumpFile+".tmp", cli.DumpFile); err != nil {
 		return fmt.Errorf("renaming dump file: %w", err)
 	}
-	slog.Info("Dump file saved")
+	slog.Info("Dump file saved", "d", time.Since(t0).String())
 
-	if s3sess != nil {
+	if blobs != nil {
+		t1 := time.Now()
 		key := fmt.Sprintf("reports-%s.jsons.gz", time.Now().UTC().Format("2006-01-02"))
 		fd, err := os.Open(cli.DumpFile)
 		if err != nil {
 			return fmt.Errorf("opening dump file: %w", err)
 		}
-		if err := s3sess.Upload(fd, key); err != nil {
+		if err := blobs.Upload(context.Background(), key, fd); err != nil {
 			return fmt.Errorf("uploading dump file: %w", err)
 		}
 		_ = fd.Close()
-		slog.Info("Dump file uploaded")
+		slog.Info("Dump file uploaded", "d", time.Since(t1).String())
 	}
 
 	return nil
@@ -294,7 +310,7 @@ func (s *server) handleNewData(w http.ResponseWriter, r *http.Request) {
 	lr := &io.LimitedReader{R: r.Body, N: 40 * 1024}
 	bs, _ := io.ReadAll(lr)
 	if err := json.Unmarshal(bs, &rep); err != nil {
-		log.Error("Failed to decode JSON", "error", err)
+		log.Error("Failed to decode JSON", slogutil.Error(err))
 		http.Error(w, "JSON Decode Error", http.StatusInternalServerError)
 		return
 	}
@@ -304,7 +320,7 @@ func (s *server) handleNewData(w http.ResponseWriter, r *http.Request) {
 	rep.Address = addr
 
 	if err := rep.Validate(); err != nil {
-		log.Error("Failed to validate report", "error", err)
+		log.Error("Failed to validate report", slogutil.Error(err))
 		http.Error(w, "Validation Error", http.StatusInternalServerError)
 		return
 	}
@@ -351,6 +367,16 @@ func (s *server) addReport(rep *contract.Report) bool {
 			break
 		}
 	}
+	rep.DistDist = rep.Distribution
+	rep.DistOS = rep.OS
+	rep.DistArch = rep.Arch
+
+	if strings.HasPrefix(rep.Version, "v2.") {
+		rep.Database.ModernCSQLite = strings.Contains(rep.LongVersion, "modernc-sqlite")
+		rep.Database.MattnSQLite = !rep.Database.ModernCSQLite
+	} else {
+		rep.Database.LevelDB = true
+	}
 
 	_, loaded := s.reports.LoadAndStore(rep.UniqueID, rep)
 	return loaded
@@ -371,6 +397,7 @@ func (s *server) save(w io.Writer) error {
 }
 
 func (s *server) load(r io.Reader) {
+	t0 := time.Now()
 	dec := json.NewDecoder(r)
 	s.reports.Clear()
 	for {
@@ -378,12 +405,12 @@ func (s *server) load(r io.Reader) {
 		if err := dec.Decode(&rep); errors.Is(err, io.EOF) {
 			break
 		} else if err != nil {
-			slog.Error("Failed to load record", "error", err)
+			slog.Error("Failed to load record", slogutil.Error(err))
 			break
 		}
 		s.addReport(&rep)
 	}
-	slog.Info("Loaded reports", "count", s.reports.Size())
+	slog.Info("Loaded reports", "count", s.reports.Size(), "d", time.Since(t0).String())
 }
 
 var (

cmd/stdiscosrv/amqp.go

@@ -10,7 +10,7 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"log"
+	"log/slog"
 
 	amqp "github.com/rabbitmq/amqp091-go"
 	"github.com/thejerf/suture/v4"
@@ -23,6 +23,7 @@ import (
 
 type amqpReplicator struct {
 	suture.Service
+
 	broker   string
 	sender   *amqpSender
 	receiver *amqpReceiver
@@ -172,7 +173,7 @@ func (s *amqpReceiver) Serve(ctx context.Context) error {
 				id, err = protocol.DeviceIDFromString(string(rec.Key))
 			}
 			if err != nil {
-				log.Println("Replication device ID:", err)
+				slog.Warn("Failed to parse replication device ID", "error", err)
 				replicationRecvsTotal.WithLabelValues("error").Inc()
 				continue
 			}

cmd/stdiscosrv/apisrv.go

@@ -18,6 +18,7 @@ import (
 	"fmt"
 	io "io"
 	"log"
+	"log/slog"
 	"math/rand"
 	"net"
 	"net/http"
@@ -66,7 +67,7 @@ type contextKey int
 
 const idKey contextKey = iota
 
-func newAPISrv(addr string, cert tls.Certificate, db database, repl replicator, useHTTP, compression bool) *apiSrv {
+func newAPISrv(addr string, cert tls.Certificate, db database, repl replicator, useHTTP, compression bool, desiredUnseenNotFoundRate, desiredSeenNotFoundRate float64) *apiSrv {
 	return &apiSrv{
 		addr:        addr,
 		cert:        cert,
@@ -77,13 +78,13 @@ func newAPISrv(addr string, cert tls.Certificate, db database, repl replicator,
 		seenTracker: &retryAfterTracker{
 			name:         "seenTracker",
 			bucketStarts: time.Now(),
-			desiredRate:  250,
+			desiredRate:  desiredSeenNotFoundRate,
 			currentDelay: notFoundRetryUnknownMinSeconds,
 		},
 		notSeenTracker: &retryAfterTracker{
 			name:         "notSeenTracker",
 			bucketStarts: time.Now(),
-			desiredRate:  250,
+			desiredRate:  desiredUnseenNotFoundRate,
 			currentDelay: notFoundRetryUnknownMaxSeconds / 2,
 		},
 	}
@@ -93,7 +94,7 @@ func (s *apiSrv) Serve(ctx context.Context) error {
 	if s.useHTTP {
 		listener, err := net.Listen("tcp", s.addr)
 		if err != nil {
-			log.Println("Listen:", err)
+			slog.ErrorContext(ctx, "Failed to listen", "error", err)
 			return err
 		}
 		s.listener = listener
@@ -107,7 +108,7 @@ func (s *apiSrv) Serve(ctx context.Context) error {
 
 		tlsListener, err := tls.Listen("tcp", s.addr, tlsCfg)
 		if err != nil {
-			log.Println("Listen:", err)
+			slog.ErrorContext(ctx, "Failed to listen", "error", err)
 			return err
 		}
 		s.listener = tlsListener
@@ -132,7 +133,7 @@ func (s *apiSrv) Serve(ctx context.Context) error {
 
 	err := srv.Serve(s.listener)
 	if err != nil {
-		log.Println("Serve:", err)
+		slog.ErrorContext(ctx, "Failed to serve", "error", err)
 	}
 	return err
 }
@@ -151,9 +152,7 @@ func (s *apiSrv) handler(w http.ResponseWriter, req *http.Request) {
 	reqID := requestID(rand.Int63())
 	req = req.WithContext(context.WithValue(req.Context(), idKey, reqID))
 
-	if debug {
-		log.Println(reqID, req.Method, req.URL, req.Proto)
-	}
+	slog.Debug("Handling request", "id", reqID, "method", req.Method, "url", req.URL, "proto", req.Proto)
 
 	remoteAddr := &net.TCPAddr{
 		IP:   nil,
@@ -174,7 +173,7 @@ func (s *apiSrv) handler(w http.ResponseWriter, req *http.Request) {
 		var err error
 		remoteAddr, err = net.ResolveTCPAddr("tcp", req.RemoteAddr)
 		if err != nil {
-			log.Println("remoteAddr:", err)
+			slog.Warn("Failed to resolve remote address", "address", req.RemoteAddr, "error", err)
 			lw.Header().Set("Retry-After", errorRetryAfterString())
 			http.Error(lw, "Internal Server Error", http.StatusInternalServerError)
 			apiRequestsTotal.WithLabelValues("no_remote_addr").Inc()
@@ -197,9 +196,7 @@ func (s *apiSrv) handleGET(w http.ResponseWriter, req *http.Request) {
 
 	deviceID, err := protocol.DeviceIDFromString(req.URL.Query().Get("device"))
 	if err != nil {
-		if debug {
-			log.Println(reqID, "bad device param:", err)
-		}
+		slog.Debug("Request with bad device param", "id", reqID, "error", err)
 		lookupRequestsTotal.WithLabelValues("bad_request").Inc()
 		w.Header().Set("Retry-After", errorRetryAfterString())
 		http.Error(w, "Bad Request", http.StatusBadRequest)
@@ -257,11 +254,9 @@ func (s *apiSrv) handleGET(w http.ResponseWriter, req *http.Request) {
 func (s *apiSrv) handlePOST(remoteAddr *net.TCPAddr, w http.ResponseWriter, req *http.Request) {
 	reqID := req.Context().Value(idKey).(requestID)
 
-	rawCert, err := certificateBytes(req)
+	rawCert, err := s.certificateBytes(req)
 	if err != nil {
-		if debug {
-			log.Println(reqID, "no certificates:", err)
-		}
+		slog.Debug("Request without certificates", "id", reqID, "error", err)
 		announceRequestsTotal.WithLabelValues("no_certificate").Inc()
 		w.Header().Set("Retry-After", errorRetryAfterString())
 		http.Error(w, "Forbidden", http.StatusForbidden)
@@ -270,9 +265,7 @@ func (s *apiSrv) handlePOST(remoteAddr *net.TCPAddr, w http.ResponseWriter, req
 
 	var ann announcement
 	if err := json.NewDecoder(req.Body).Decode(&ann); err != nil {
-		if debug {
-			log.Println(reqID, "decode:", err)
-		}
+		slog.Debug("Failed to decode request", "id", reqID, "error", err)
 		announceRequestsTotal.WithLabelValues("bad_request").Inc()
 		w.Header().Set("Retry-After", errorRetryAfterString())
 		http.Error(w, "Bad Request", http.StatusBadRequest)
@@ -283,9 +276,7 @@ func (s *apiSrv) handlePOST(remoteAddr *net.TCPAddr, w http.ResponseWriter, req
 
 	addresses := fixupAddresses(remoteAddr, ann.Addresses)
 	if len(addresses) == 0 {
-		if debug {
-			log.Println(reqID, "no addresses")
-		}
+		slog.Debug("Request without addresses", "id", reqID, "error", err)
 		announceRequestsTotal.WithLabelValues("bad_request").Inc()
 		w.Header().Set("Retry-After", errorRetryAfterString())
 		http.Error(w, "Bad Request", http.StatusBadRequest)
@@ -293,9 +284,7 @@ func (s *apiSrv) handlePOST(remoteAddr *net.TCPAddr, w http.ResponseWriter, req
 	}
 
 	if err := s.handleAnnounce(deviceID, addresses); err != nil {
-		if debug {
-			log.Println(reqID, "handle:", err)
-		}
+		slog.Debug("Failed to handle request", "id", reqID, "error", err)
 		announceRequestsTotal.WithLabelValues("internal_error").Inc()
 		w.Header().Set("Retry-After", errorRetryAfterString())
 		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
@@ -306,9 +295,7 @@ func (s *apiSrv) handlePOST(remoteAddr *net.TCPAddr, w http.ResponseWriter, req
 
 	w.Header().Set("Reannounce-After", reannounceAfterString())
 	w.WriteHeader(http.StatusNoContent)
-	if debug {
-		log.Println(reqID, "announced", deviceID, addresses)
-	}
+	slog.Debug("Device announced", "id", reqID, "device", deviceID, "addresses", addresses)
 }
 
 func (s *apiSrv) Stop() {
@@ -343,14 +330,17 @@ func handlePing(w http.ResponseWriter, _ *http.Request) {
 	w.WriteHeader(http.StatusNoContent)
 }
 
-func certificateBytes(req *http.Request) ([]byte, error) {
+func (s *apiSrv) certificateBytes(req *http.Request) ([]byte, error) {
 	if req.TLS != nil && len(req.TLS.PeerCertificates) > 0 {
 		return req.TLS.PeerCertificates[0].Raw, nil
 	}
+	if !s.useHTTP {
+		return nil, errors.New("no certificate presented")
+	}
 
 	var bs []byte
 
-	if hdr := req.Header.Get("X-SSL-Cert"); hdr != "" {
+	if hdr := req.Header.Get("X-Ssl-Cert"); hdr != "" {
 		if strings.Contains(hdr, "%") {
 			// Nginx using $ssl_client_escaped_cert
 			// The certificate is in PEM format with url encoding.
@@ -513,6 +503,7 @@ func fixupAddresses(remote *net.TCPAddr, addresses []string) []string {
 
 type loggingResponseWriter struct {
 	http.ResponseWriter
+
 	statusCode int
 }
 
@@ -576,5 +567,17 @@ func (t *retryAfterTracker) retryAfterS() int {
 	}
 	t.curCount++
 	t.mut.Unlock()
-	return t.currentDelay + rand.Intn(t.currentDelay/4)
+
+	// Skewed normal distribution with the mean at currentDelay and the
+	// limits (50% and 150%) at 3 standard deviations
+	nf := rand.NormFloat64()
+	minD := max(notFoundRetryUnknownMinSeconds, t.currentDelay/2)
+	maxD := min(notFoundRetryUnknownMaxSeconds, t.currentDelay*3/2)
+	intv := float64(maxD - t.currentDelay)
+	if nf < 0 {
+		intv = float64(t.currentDelay - minD)
+	}
+	nf = min(max(nf*intv/3+float64(t.currentDelay), notFoundRetryUnknownMinSeconds), notFoundRetryUnknownMaxSeconds)
+
+	return int(nf)
 }

cmd/stdiscosrv/apisrv_test.go

@@ -18,6 +18,7 @@ import (
 	"regexp"
 	"strings"
 	"testing"
+	"time"
 
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/tlsutil"
@@ -106,16 +107,63 @@ func addr(host string, port int) *net.TCPAddr {
 	}
 }
 
+func TestRetryAfterSHistogram(t *testing.T) {
+	tracker := &retryAfterTracker{
+		name:         "test",
+		bucketStarts: time.Now(),
+		desiredRate:  100,
+		currentDelay: 1800,
+	}
+
+	const n = 1000
+	bucketSize := 60 // seconds per histogram bucket
+	numBuckets := (notFoundRetryUnknownMaxSeconds + bucketSize - 1) / bucketSize
+	buckets := make([]int, numBuckets)
+
+	for i := 0; i < n; i++ {
+		v := tracker.retryAfterS()
+		if v < notFoundRetryUnknownMinSeconds || v > notFoundRetryUnknownMaxSeconds {
+			t.Fatalf("retryAfterS() = %d, out of range [%d, %d]", v, notFoundRetryUnknownMinSeconds, notFoundRetryUnknownMaxSeconds)
+		}
+		b := (v - 1) / bucketSize
+		if b >= numBuckets {
+			b = numBuckets - 1
+		}
+		buckets[b]++
+	}
+
+	// Print a horizontal histogram
+	maxCount := 0
+	for _, c := range buckets {
+		if c > maxCount {
+			maxCount = c
+		}
+	}
+	barWidth := 60
+	for i, c := range buckets {
+		lo := i*bucketSize + 1
+		hi := (i + 1) * bucketSize
+		if hi > notFoundRetryUnknownMaxSeconds {
+			hi = notFoundRetryUnknownMaxSeconds
+		}
+		bar := ""
+		if maxCount > 0 {
+			bar = strings.Repeat("#", c*barWidth/maxCount)
+		}
+		t.Logf("%4d-%4ds | %-*s %d", lo, hi, barWidth, bar, c)
+	}
+}
+
 func BenchmarkAPIRequests(b *testing.B) {
 	db := newInMemoryStore(b.TempDir(), 0, nil)
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 	go db.Serve(ctx)
-	api := newAPISrv("127.0.0.1:0", tls.Certificate{}, db, nil, true, true)
+	api := newAPISrv("127.0.0.1:0", tls.Certificate{}, db, nil, true, true, 1000, 1000)
 	srv := httptest.NewServer(http.HandlerFunc(api.handler))
 
 	kf := b.TempDir() + "/cert"
-	crt, err := tlsutil.NewCertificate(kf+".crt", kf+".key", "localhost", 7)
+	crt, err := tlsutil.NewCertificate(kf+".crt", kf+".key", "localhost", 7, true)
 	if err != nil {
 		b.Fatal(err)
 	}

cmd/stdiscosrv/database.go

@@ -13,7 +13,7 @@ import (
 	"encoding/binary"
 	"errors"
 	"io"
-	"log"
+	"log/slog"
 	"os"
 	"path"
 	"runtime"
@@ -24,11 +24,11 @@ import (
 	"github.com/puzpuzpuz/xsync/v3"
 	"google.golang.org/protobuf/proto"
 
+	"github.com/syncthing/syncthing/internal/blob"
 	"github.com/syncthing/syncthing/internal/gen/discosrv"
 	"github.com/syncthing/syncthing/internal/protoutil"
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/rand"
-	"github.com/syncthing/syncthing/lib/s3"
 )
 
 type clock interface {
@@ -51,12 +51,12 @@ type inMemoryStore struct {
 	m             *xsync.MapOf[protocol.DeviceID, *discosrv.DatabaseRecord]
 	dir           string
 	flushInterval time.Duration
-	s3            *s3.Session
+	blobs         blob.Store
 	objKey        string
 	clock         clock
 }
 
-func newInMemoryStore(dir string, flushInterval time.Duration, s3sess *s3.Session) *inMemoryStore {
+func newInMemoryStore(dir string, flushInterval time.Duration, blobs blob.Store) *inMemoryStore {
 	hn, err := os.Hostname()
 	if err != nil {
 		hn = rand.String(8)
@@ -65,33 +65,33 @@ func newInMemoryStore(dir string, flushInterval time.Duration, s3sess *s3.Sessio
 		m:             xsync.NewMapOf[protocol.DeviceID, *discosrv.DatabaseRecord](),
 		dir:           dir,
 		flushInterval: flushInterval,
-		s3:            s3sess,
+		blobs:         blobs,
 		objKey:        hn + ".db",
 		clock:         defaultClock{},
 	}
 	nr, err := s.read()
-	if os.IsNotExist(err) && s3sess != nil {
-		// Try to read from AWS
-		latestKey, cerr := s3sess.LatestKey()
+	if os.IsNotExist(err) && blobs != nil {
+		// Try to read from blob storage
+		latestKey, cerr := blobs.LatestKey(context.Background())
 		if cerr != nil {
-			log.Println("Error reading database from S3:", err)
+			slog.Error("Failed to find database in blob storage", "error", cerr)
 			return s
 		}
 		fd, cerr := os.Create(path.Join(s.dir, "records.db"))
 		if cerr != nil {
-			log.Println("Error creating database file:", err)
+			slog.Error("Failed to create database file", "error", cerr)
 			return s
 		}
-		if cerr := s3sess.Download(fd, latestKey); cerr != nil {
-			log.Printf("Error reading database from S3: %v", err)
+		if cerr := blobs.Download(context.Background(), latestKey, fd); cerr != nil {
+			slog.Error("Failed to download database from blob storage", "error", cerr)
 		}
 		_ = fd.Close()
 		nr, err = s.read()
 	}
 	if err != nil {
-		log.Println("Error reading database:", err)
+		slog.Error("Failed to read database", "error", err)
 	}
-	log.Printf("Read %d records from database", nr)
+	slog.Info("Loaded database", "records", nr)
 	s.expireAndCalculateStatistics()
 	return s
 }
@@ -113,7 +113,7 @@ func (s *inMemoryStore) merge(key *protocol.DeviceID, addrs []*discosrv.Database
 	}
 
 	if oldRec, ok := s.m.Load(*key); ok {
-		newRec = merge(oldRec, newRec)
+		newRec = merge(newRec, oldRec)
 	}
 	s.m.Store(*key, newRec)
 
@@ -135,7 +135,13 @@ func (s *inMemoryStore) get(key *protocol.DeviceID) (*discosrv.DatabaseRecord, e
 		return &discosrv.DatabaseRecord{}, nil
 	}
 
-	rec.Addresses = expire(rec.Addresses, s.clock.Now())
+	naddresses, changed := expire(rec.Addresses, s.clock.Now())
+	if changed {
+		rec = &discosrv.DatabaseRecord{
+			Addresses: naddresses,
+			Seen:      rec.Seen,
+		}
+	}
 	databaseOperations.WithLabelValues(dbOpGet, dbResSuccess).Inc()
 	return rec, nil
 }
@@ -153,13 +159,13 @@ loop:
 	for {
 		select {
 		case <-t.C:
-			log.Println("Calculating statistics")
+			slog.InfoContext(ctx, "Calculating statistics")
 			s.expireAndCalculateStatistics()
-			log.Println("Flushing database")
+			slog.InfoContext(ctx, "Flushing database")
 			if err := s.write(); err != nil {
-				log.Println("Error writing database:", err)
+				slog.ErrorContext(ctx, "Failed to write database", "error", err)
 			}
-			log.Println("Finished flushing database")
+			slog.InfoContext(ctx, "Finished flushing database")
 			t.Reset(s.flushInterval)
 
 		case <-ctx.Done():
@@ -184,12 +190,12 @@ func (s *inMemoryStore) expireAndCalculateStatistics() {
 		}
 		n++
 
-		addresses := expire(rec.Addresses, now)
-		if len(addresses) == 0 {
-			rec.Addresses = nil
-			s.m.Store(key, rec)
-		} else if len(addresses) != len(rec.Addresses) {
-			rec.Addresses = addresses
+		addresses, changed := expire(rec.Addresses, now)
+		if changed {
+			rec = &discosrv.DatabaseRecord{
+				Addresses: addresses,
+				Seen:      rec.Seen,
+			}
 			s.m.Store(key, rec)
 		}
 
@@ -256,7 +262,7 @@ func (s *inMemoryStore) write() (err error) {
 	if err != nil {
 		return err
 	}
-	bw := bufio.NewWriter(fd)
+	bw := bufio.NewWriterSize(fd, 1<<20)
 
 	var buf []byte
 	var rangeErr error
@@ -300,7 +306,7 @@ func (s *inMemoryStore) write() (err error) {
 	}
 
 	if err := bw.Flush(); err != nil {
-		_ = fd.Close
+		_ = fd.Close()
 		return err
 	}
 	if err := fd.Close(); err != nil {
@@ -310,18 +316,24 @@ func (s *inMemoryStore) write() (err error) {
 		return err
 	}
 
-	// Upload to S3
-	if s.s3 != nil {
+	if info, err := os.Lstat(dbf); err == nil {
+		slog.Info("Saved database", "name", dbf, "size", info.Size(), "modtime", info.ModTime())
+	} else {
+		slog.Warn("Failed to stat database after save", "error", err)
+	}
+
+	// Upload to blob storage
+	if s.blobs != nil {
 		fd, err = os.Open(dbf)
 		if err != nil {
-			log.Printf("Error uploading database to S3: %v", err)
+			slog.Error("Failed to upload database to blob storage", "error", err)
 			return nil
 		}
 		defer fd.Close()
-		if err := s.s3.Upload(fd, s.objKey); err != nil {
-			log.Printf("Error uploading database to S3: %v", err)
+		if err := s.blobs.Upload(context.Background(), s.objKey, fd); err != nil {
+			slog.Error("Failed to upload database to blob storage", "error", err)
 		}
-		log.Println("Finished uploading database")
+		slog.Info("Finished uploading database")
 	}
 
 	return nil
@@ -360,14 +372,14 @@ func (s *inMemoryStore) read() (int, error) {
 			key, err = protocol.DeviceIDFromString(string(rec.Key))
 		}
 		if err != nil {
-			log.Println("Bad device ID:", err)
+			slog.Error("Got bad device ID while reading database", "error", err)
 			continue
 		}
 
 		slices.SortFunc(rec.Addresses, Cmp)
-		rec.Addresses = slices.CompactFunc(rec.Addresses, Equal)
+		rec.Addresses, _ = expire(slices.CompactFunc(rec.Addresses, Equal), s.clock.Now())
 		s.m.Store(key, &discosrv.DatabaseRecord{
-			Addresses: expire(rec.Addresses, s.clock.Now()),
+			Addresses: rec.Addresses,
 			Seen:      rec.Seen,
 		})
 		nr++
@@ -378,7 +390,7 @@ func (s *inMemoryStore) read() (int, error) {
 // merge returns the merged result of the two database records a and b. The
 // result is the union of the two address sets, with the newer expiry time
 // chosen for any duplicates. The address list in a is overwritten and
-// reused for the result.
+// reused for the result; b is not modified.
 func merge(a, b *discosrv.DatabaseRecord) *discosrv.DatabaseRecord {
 	// Both lists must be sorted for this to work.
 
@@ -409,25 +421,33 @@ func merge(a, b *discosrv.DatabaseRecord) *discosrv.DatabaseRecord {
 	return a
 }
 
-// expire returns the list of addresses after removing expired entries.
-// Expiration happen in place, so the slice given as the parameter is
-// destroyed. Internal order is preserved.
-func expire(addrs []*discosrv.DatabaseAddress, now time.Time) []*discosrv.DatabaseAddress {
+// expire returns the list of addresses after removing expired entries. A
+// new slice is allocated if any changes are required, and the changed
+// boolean indicates whether that happened or not.
+func expire(addrs []*discosrv.DatabaseAddress, now time.Time) (result []*discosrv.DatabaseAddress, changed bool) {
 	cutoff := now.UnixNano()
-	naddrs := addrs[:0]
-	for i := range addrs {
-		if i > 0 && addrs[i].Address == addrs[i-1].Address {
-			// Skip duplicates
-			continue
-		}
-		if addrs[i].Expires >= cutoff {
-			naddrs = append(naddrs, addrs[i])
+	remains := 0
+	for _, a := range addrs {
+		if a.Expires < cutoff {
+			changed = true
+		} else {
+			remains++
 		}
 	}
-	if len(naddrs) == 0 {
-		return nil
+	if !changed {
+		return addrs, false
 	}
-	return naddrs
+	if remains == 0 {
+		return nil, true
+	}
+
+	naddrs := make([]*discosrv.DatabaseAddress, 0, remains)
+	for _, a := range addrs {
+		if a.Expires >= cutoff {
+			naddrs = append(naddrs, a)
+		}
+	}
+	return naddrs, true
 }
 
 func Cmp(d, other *discosrv.DatabaseAddress) (n int) {

cmd/stdiscosrv/database_test.go

@@ -161,7 +161,7 @@ func TestFilter(t *testing.T) {
 	}
 
 	for _, tc := range cases {
-		res := expire(tc.a, time.Unix(0, 10))
+		res, _ := expire(tc.a, time.Unix(0, 10))
 		if fmt.Sprint(res) != fmt.Sprint(tc.b) {
 			t.Errorf("Incorrect result %v, expected %v", res, tc.b)
 		}

cmd/stdiscosrv/main.go

@@ -9,29 +9,29 @@ package main
 import (
 	"context"
 	"crypto/tls"
-	"log"
+	"fmt"
+	"log/slog"
 	"net/http"
-	_ "net/http/pprof"
 	"os"
 	"os/signal"
-	"runtime"
+	"syscall"
 	"time"
 
 	"github.com/alecthomas/kong"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/thejerf/suture/v4"
 
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
+	"github.com/syncthing/syncthing/internal/blob"
+	"github.com/syncthing/syncthing/internal/blob/s3"
+	"github.com/syncthing/syncthing/internal/slogutil"
 	"github.com/syncthing/syncthing/lib/build"
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/rand"
-	"github.com/syncthing/syncthing/lib/s3"
 	"github.com/syncthing/syncthing/lib/tlsutil"
 )
 
 const (
-	addressExpiryTime          = 2 * time.Hour
-	databaseStatisticsInterval = 5 * time.Minute
+	addressExpiryTime = 2 * time.Hour
 
 	// Reannounce-After is set to reannounceAfterSeconds +
 	// random(reannounzeFuzzSeconds), similar for Retry-After
@@ -58,12 +58,16 @@ const (
 var debug = false
 
 type CLI struct {
-	Cert          string `group:"Listen" help:"Certificate file" default:"./cert.pem" env:"DISCOVERY_CERT_FILE"`
-	Key           string `group:"Listen" help:"Key file" default:"./key.pem" env:"DISCOVERY_KEY_FILE"`
-	HTTP          bool   `group:"Listen" help:"Listen on HTTP (behind an HTTPS proxy)" env:"DISCOVERY_HTTP"`
-	Compression   bool   `group:"Listen" help:"Enable GZIP compression of responses" env:"DISCOVERY_COMPRESSION"`
-	Listen        string `group:"Listen" help:"Listen address" default:":8443" env:"DISCOVERY_LISTEN"`
-	MetricsListen string `group:"Listen" help:"Metrics listen address" env:"DISCOVERY_METRICS_LISTEN"`
+	Cert                      string  `group:"Listen" help:"Certificate file" default:"./cert.pem" env:"DISCOVERY_CERT_FILE"`
+	Key                       string  `group:"Listen" help:"Key file" default:"./key.pem" env:"DISCOVERY_KEY_FILE"`
+	HTTP                      bool    `group:"Listen" help:"Listen on HTTP (behind an HTTPS proxy)" env:"DISCOVERY_HTTP"`
+	Compression               bool    `group:"Listen" help:"Enable GZIP compression of responses" env:"DISCOVERY_COMPRESSION"`
+	Listen                    string  `group:"Listen" help:"Listen address" default:":8443" env:"DISCOVERY_LISTEN"`
+	MetricsListen             string  `group:"Listen" help:"Metrics listen address" env:"DISCOVERY_METRICS_LISTEN"`
+	DesiredUnseenNotFoundRate float64 `group:"Listen" help:"Desired maximum rate of not-found replies for never seen devices (/s)" default:"1000" env:"DISCOVERY_UNSEEN_RATE"`
+	DesiredSeenNotFoundRate   float64 `group:"Listen" help:"Desired maximum rate of not-found replies for previously seen devices (/s)" default:"1000" env:"DISCOVERY_SEEN_RATE"`
+
+	ShutdownDelay float64 `help:"Time to wait before shutdown after receiving a shutdown signal (s)" env:"DISCOVERY_SHUTDOWN_DELAY"`
 
 	DBDir           string        `group:"Database" help:"Database directory" default:"." env:"DISCOVERY_DB_DIR"`
 	DBFlushInterval time.Duration `group:"Database" help:"Interval between database flushes" default:"5m" env:"DISCOVERY_DB_FLUSH_INTERVAL"`
@@ -81,34 +85,37 @@ type CLI struct {
 }
 
 func main() {
-	log.SetOutput(os.Stdout)
-
 	var cli CLI
 	kong.Parse(&cli)
-	debug = cli.Debug
 
-	log.Println(build.LongVersionFor("stdiscosrv"))
+	level := slog.LevelInfo
+	if cli.Debug {
+		level = slog.LevelDebug
+	}
+	slogutil.SetDefaultLevel(level)
 	if cli.Version {
+		fmt.Println(build.LongVersionFor("stdiscosrv"))
 		return
 	}
-
-	buildInfo.WithLabelValues(build.Version, runtime.Version(), build.User, build.Date.UTC().Format("2006-01-02T15:04:05Z")).Set(1)
+	slog.Info(build.LongVersionFor("stdiscosrv"))
 
 	var cert tls.Certificate
 	if !cli.HTTP {
 		var err error
 		cert, err = tls.LoadX509KeyPair(cli.Cert, cli.Key)
 		if os.IsNotExist(err) {
-			log.Println("Failed to load keypair. Generating one, this might take a while...")
-			cert, err = tlsutil.NewCertificate(cli.Cert, cli.Key, "stdiscosrv", 20*365)
+			slog.Info("Failed to load keypair. Generating one, this might take a while...")
+			cert, err = tlsutil.NewCertificate(cli.Cert, cli.Key, "stdiscosrv", 20*365, false)
 			if err != nil {
-				log.Fatalln("Failed to generate X509 key pair:", err)
+				slog.Error("Failed to generate X509 key pair", "error", err)
+				os.Exit(1)
 			}
 		} else if err != nil {
-			log.Fatalln("Failed to load keypair:", err)
+			slog.Error("Failed to load keypair", "error", err)
+			os.Exit(1)
 		}
 		devID := protocol.NewDeviceID(cert.Certificate[0])
-		log.Println("Server device ID is", devID)
+		slog.Info("Loaded certificate keypair", "deviceId", devID.String())
 	}
 
 	// Root of the service tree.
@@ -117,18 +124,19 @@ func main() {
 		Timeout:           2 * time.Minute,
 	})
 
-	// If configured, use S3 for database backups.
-	var s3c *s3.Session
+	// If configured, use blob storage for database backups.
+	var blobs blob.Store
+	var err error
 	if cli.DBS3Endpoint != "" {
-		var err error
-		s3c, err = s3.NewSession(cli.DBS3Endpoint, cli.DBS3Region, cli.DBS3Bucket, cli.DBS3AccessKeyID, cli.DBS3SecretKey)
-		if err != nil {
-			log.Fatalf("Failed to create S3 session: %v", err)
-		}
+		blobs, err = s3.NewSession(cli.DBS3Endpoint, cli.DBS3Region, cli.DBS3Bucket, cli.DBS3AccessKeyID, cli.DBS3SecretKey)
+	}
+	if err != nil {
+		slog.Error("Failed to create blob store", "error", err)
+		os.Exit(1)
 	}
 
 	// Start the database.
-	db := newInMemoryStore(cli.DBDir, cli.DBFlushInterval, s3c)
+	db := newInMemoryStore(cli.DBDir, cli.DBFlushInterval, blobs)
 	main.Add(db)
 
 	// If we have an AMQP broker for replication, start that
@@ -141,7 +149,7 @@ func main() {
 	}
 
 	// Start the main API server.
-	qs := newAPISrv(cli.Listen, cert, db, repl, cli.HTTP, cli.Compression)
+	qs := newAPISrv(cli.Listen, cert, db, repl, cli.HTTP, cli.Compression, cli.DesiredUnseenNotFoundRate, cli.DesiredSeenNotFoundRate)
 	main.Add(qs)
 
 	// If we have a metrics port configured, start a metrics handler.
@@ -149,7 +157,9 @@ func main() {
 		go func() {
 			mux := http.NewServeMux()
 			mux.Handle("/metrics", promhttp.Handler())
-			log.Fatal(http.ListenAndServe(cli.MetricsListen, mux))
+			err := http.ListenAndServe(cli.MetricsListen, mux)
+			slog.Error("Failed to serve", "error", err)
+			os.Exit(1)
 		}()
 	}
 
@@ -159,9 +169,11 @@ func main() {
 	// Cancel on signal
 	signalChan := make(chan os.Signal, 1)
 	signal.Notify(signalChan, os.Interrupt)
+	signal.Notify(signalChan, syscall.SIGTERM)
 	go func() {
 		sig := <-signalChan
-		log.Printf("Received signal %s; shutting down", sig)
+		slog.Info("Received signal; shutting down", "signal", sig, "delay", cli.ShutdownDelay)
+		time.Sleep(time.Duration(float64(time.Second) * cli.ShutdownDelay))
 		cancel()
 	}()
 

cmd/stdiscosrv/stats.go

@@ -7,18 +7,12 @@
 package main
 
 import (
+	"net/http"
+
 	"github.com/prometheus/client_golang/prometheus"
 )
 
 var (
-	buildInfo = prometheus.NewGaugeVec(
-		prometheus.GaugeOpts{
-			Namespace: "syncthing",
-			Subsystem: "discovery",
-			Name:      "build_info",
-			Help:      "A metric with a constant '1' value labeled by version, goversion, builduser and builddate from which stdiscosrv was built.",
-		}, []string{"version", "goversion", "builduser", "builddate"})
-
 	apiRequestsTotal = prometheus.NewCounterVec(
 		prometheus.CounterOpts{
 			Namespace: "syncthing",
@@ -121,18 +115,15 @@ var (
 )
 
 const (
-	dbOpGet             = "get"
-	dbOpPut             = "put"
-	dbOpMerge           = "merge"
-	dbOpDelete          = "delete"
-	dbResSuccess        = "success"
-	dbResNotFound       = "not_found"
-	dbResError          = "error"
-	dbResUnmarshalError = "unmarsh_err"
+	dbOpGet       = "get"
+	dbOpPut       = "put"
+	dbOpMerge     = "merge"
+	dbResSuccess  = "success"
+	dbResNotFound = "not_found"
 )
 
 func init() {
-	prometheus.MustRegister(buildInfo,
+	prometheus.MustRegister(
 		apiRequestsTotal, apiRequestsSeconds,
 		lookupRequestsTotal, announceRequestsTotal,
 		replicationSendsTotal, replicationRecvsTotal,
@@ -140,4 +131,24 @@ func init() {
 		databaseOperations, databaseOperationSeconds,
 		databaseWriteSeconds, databaseLastWritten,
 		retryAfterLevel)
+
+	// Prewarm important counters so they're available with zero values at
+	// startup
+
+	apiRequestsTotal.WithLabelValues(http.MethodGet, "200")
+	apiRequestsTotal.WithLabelValues(http.MethodGet, "404")
+	apiRequestsTotal.WithLabelValues(http.MethodPost, "204")
+	apiRequestsTotal.WithLabelValues(http.MethodPost, "400")
+	apiRequestsTotal.WithLabelValues(http.MethodPost, "403")
+
+	lookupRequestsTotal.WithLabelValues("success")
+	lookupRequestsTotal.WithLabelValues("not_found_ever")
+	lookupRequestsTotal.WithLabelValues("not_found_recent")
+
+	announceRequestsTotal.WithLabelValues("success")
+	announceRequestsTotal.WithLabelValues("bad_request")
+	announceRequestsTotal.WithLabelValues("no_certificate")
+
+	replicationSendsTotal.WithLabelValues("success")
+	replicationRecvsTotal.WithLabelValues("success")
 }

cmd/strelaysrv/listener.go

@@ -184,7 +184,7 @@ func protocolConnectionHandler(tcpConn net.Conn, config *tls.Config, token strin
 					continue
 				}
 				// requestedPeer is the server, id is the client
-				ses := newSession(requestedPeer, id, sessionLimiter, globalLimiter)
+				ses := newSession(requestedPeer, id, sessionLimitBps, globalLimiter)
 
 				go ses.Serve()
 

cmd/strelaysrv/main.go

@@ -14,6 +14,7 @@ import (
 	"os"
 	"os/signal"
 	"path/filepath"
+	"strconv"
 	"strings"
 	"sync/atomic"
 	"syscall"
@@ -21,7 +22,6 @@ import (
 
 	"golang.org/x/time/rate"
 
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/build"
 	"github.com/syncthing/syncthing/lib/config"
 	"github.com/syncthing/syncthing/lib/events"
@@ -51,7 +51,6 @@ var (
 	globalLimitBps    int
 	overLimit         atomic.Bool
 	descriptorLimit   int64
-	sessionLimiter    *rate.Limiter
 	globalLimiter     *rate.Limiter
 	networkBufferSize int
 
@@ -72,9 +71,13 @@ var (
 
 // httpClient is the HTTP client we use for outbound requests. It has a
 // timeout and may get further options set during initialization.
-var httpClient = &http.Client{
-	Timeout: 30 * time.Second,
-}
+var (
+	httpTransport = &http.Transport{}
+	httpClient    = &http.Client{
+		Timeout:   30 * time.Second,
+		Transport: httpTransport,
+	}
+)
 
 func main() {
 	log.SetFlags(log.Lshortfile | log.LstdFlags)
@@ -133,9 +136,7 @@ func main() {
 		// also come from that address.
 		laddr.Port = 0
 		boundDialer := &net.Dialer{LocalAddr: laddr}
-		httpClient.Transport = &http.Transport{
-			DialContext: boundDialer.DialContext,
-		}
+		httpTransport.DialContext = boundDialer.DialContext
 	}
 
 	log.Println(longVer)
@@ -158,12 +159,17 @@ func main() {
 	cert, err := tls.LoadX509KeyPair(certFile, keyFile)
 	if err != nil {
 		log.Println("Failed to load keypair. Generating one, this might take a while...")
-		cert, err = tlsutil.NewCertificate(certFile, keyFile, "strelaysrv", 20*365)
+		cert, err = tlsutil.NewCertificate(certFile, keyFile, "strelaysrv", 20*365, false)
 		if err != nil {
 			log.Fatalln("Failed to generate X509 key pair:", err)
 		}
 	}
 
+	// Outgoing HTTPS requests may use our certificate for authentication
+	httpTransport.TLSClientConfig = &tls.Config{
+		Certificates: []tls.Certificate{cert},
+	}
+
 	tlsCfg := &tls.Config{
 		Certificates:           []tls.Certificate{cert},
 		NextProtos:             []string{protocol.ProtocolName},
@@ -228,9 +234,6 @@ func main() {
 		}
 	}
 
-	if sessionLimitBps > 0 {
-		sessionLimiter = rate.NewLimiter(rate.Limit(sessionLimitBps), 2*sessionLimitBps)
-	}
 	if globalLimitBps > 0 {
 		globalLimiter = rate.NewLimiter(rate.Limit(globalLimitBps), 2*globalLimitBps)
 	}
@@ -251,10 +254,10 @@ func main() {
 	query.Set("pingInterval", pingInterval.String())
 	query.Set("networkTimeout", networkTimeout.String())
 	if sessionLimitBps > 0 {
-		query.Set("sessionLimitBps", fmt.Sprint(sessionLimitBps))
+		query.Set("sessionLimitBps", strconv.Itoa(sessionLimitBps))
 	}
 	if globalLimitBps > 0 {
-		query.Set("globalLimitBps", fmt.Sprint(globalLimitBps))
+		query.Set("globalLimitBps", strconv.Itoa(globalLimitBps))
 	}
 	if statusAddr != "" {
 		query.Set("statusAddr", statusAddr)
@@ -281,7 +284,7 @@ func main() {
 	for _, pool := range pools {
 		pool = strings.TrimSpace(pool)
 		if len(pool) > 0 {
-			go poolHandler(pool, uri, mapping, cert)
+			go poolHandler(pool, uri, mapping)
 		}
 	}
 

cmd/strelaysrv/pool.go

@@ -4,7 +4,6 @@ package main
 
 import (
 	"bytes"
-	"crypto/tls"
 	"encoding/json"
 	"io"
 	"log"
@@ -17,7 +16,7 @@ const (
 	httpStatusEnhanceYourCalm = 429
 )
 
-func poolHandler(pool string, uri *url.URL, mapping mapping, ownCert tls.Certificate) {
+func poolHandler(pool string, uri *url.URL, mapping mapping) {
 	if debug {
 		log.Println("Joining", pool)
 	}
@@ -32,24 +31,7 @@ func poolHandler(pool string, uri *url.URL, mapping mapping, ownCert tls.Certifi
 			uriCopy.String(),
 		})
 
-		poolUrl, err := url.Parse(pool)
-		if err != nil {
-			log.Printf("Could not parse pool url '%s': %v", pool, err)
-		}
-
-		client := http.DefaultClient
-		if poolUrl.Scheme == "https" {
-			// Sent our certificate in join request
-			client = &http.Client{
-				Transport: &http.Transport{
-					TLSClientConfig: &tls.Config{
-						Certificates: []tls.Certificate{ownCert},
-					},
-				},
-			}
-		}
-
-		resp, err := client.Post(pool, "application/json", &b)
+		resp, err := httpClient.Post(pool, "application/json", &b) //nolint:noctx
 		if err != nil {
 			log.Printf("Error joining pool %v: HTTP request: %v", pool, err)
 			time.Sleep(time.Minute)

cmd/strelaysrv/session.go

@@ -27,7 +27,7 @@ var (
 	bytesProxied    atomic.Int64
 )
 
-func newSession(serverid, clientid syncthingprotocol.DeviceID, sessionRateLimit, globalRateLimit *rate.Limiter) *session {
+func newSession(serverid, clientid syncthingprotocol.DeviceID, sessionLimitBps int, globalRateLimit *rate.Limiter) *session {
 	serverkey := make([]byte, 32)
 	_, err := rand.Read(serverkey)
 	if err != nil {
@@ -40,12 +40,17 @@ func newSession(serverid, clientid syncthingprotocol.DeviceID, sessionRateLimit,
 		return nil
 	}
 
+	var sessionRateLimit *rate.Limiter
+	if sessionLimitBps > 0 {
+		sessionRateLimit = rate.NewLimiter(rate.Limit(sessionLimitBps), 2*sessionLimitBps)
+	}
 	ses := &session{
 		serverkey: serverkey,
 		serverid:  serverid,
 		clientkey: clientkey,
 		clientid:  clientid,
 		rateLimit: makeRateLimitFunc(sessionRateLimit, globalRateLimit),
+		limiter:   sessionRateLimit,
 		connsChan: make(chan net.Conn),
 		conns:     make([]net.Conn, 0, 2),
 	}
@@ -109,6 +114,7 @@ type session struct {
 	clientid  syncthingprotocol.DeviceID
 
 	rateLimit func(bytes int)
+	limiter   *rate.Limiter
 
 	connsChan chan net.Conn
 	conns     []net.Conn
@@ -152,19 +158,12 @@ func (s *session) Serve() {
 			}
 
 			wg := sync.WaitGroup{}
-			wg.Add(2)
 
 			var err0 error
-			go func() {
-				err0 = s.proxy(s.conns[0], s.conns[1])
-				wg.Done()
-			}()
+			wg.Go(func() { err0 = s.proxy(s.conns[0], s.conns[1]) })
 
 			var err1 error
-			go func() {
-				err1 = s.proxy(s.conns[1], s.conns[0])
-				wg.Done()
-			}()
+			wg.Go(func() { err1 = s.proxy(s.conns[1], s.conns[0]) })
 
 			sessionMut.Lock()
 			activeSessions = append(activeSessions, s)

cmd/strelaysrv/status.go

@@ -122,7 +122,7 @@ func (r *rateCalculator) updateRates(interval time.Duration) {
 
 func (r *rateCalculator) rate(periods int) int64 {
 	var tot int64
-	for i := 0; i < periods; i++ {
+	for i := range periods {
 		tot += r.rates[i]
 	}
 	return tot / int64(periods)

cmd/strelaysrv/testutil/main.go

@@ -6,6 +6,7 @@ import (
 	"bufio"
 	"context"
 	"crypto/tls"
+	"errors"
 	"flag"
 	"log"
 	"net"
@@ -14,7 +15,6 @@ import (
 	"path/filepath"
 	"time"
 
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	syncthingprotocol "github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/relay/client"
 	"github.com/syncthing/syncthing/lib/relay/protocol"
@@ -133,7 +133,8 @@ func connectToStdio(stdin <-chan string, conn net.Conn) {
 		conn.SetReadDeadline(time.Now().Add(time.Millisecond))
 		n, err := conn.Read(buf[0:])
 		if err != nil {
-			nerr, ok := err.(net.Error)
+			var nerr net.Error
+			ok := errors.As(err, &nerr)
 			if !ok || !nerr.Timeout() {
 				log.Println(err)
 				return

cmd/strelaysrv/utils.go

@@ -10,7 +10,7 @@ import (
 func setTCPOptions(conn net.Conn) error {
 	tcpConn, ok := conn.(*net.TCPConn)
 	if !ok {
-		return errors.New("Not a TCP connection")
+		return errors.New("not a TCP connection")
 	}
 	if err := tcpConn.SetLinger(0); err != nil {
 		return err

cmd/syncthing/blockprof.go

@@ -8,11 +8,14 @@ package main
 
 import (
 	"fmt"
+	"log/slog"
 	"os"
 	"runtime"
 	"runtime/pprof"
 	"syscall"
 	"time"
+
+	"github.com/syncthing/syncthing/internal/slogutil"
 )
 
 func startBlockProfiler() {
@@ -20,10 +23,10 @@ func startBlockProfiler() {
 	if profiler == nil {
 		panic("Couldn't find block profiler")
 	}
-	l.Debugln("Starting block profiling")
+	slog.Debug("Starting block profiling")
 	go func() {
 		err := saveBlockingProfiles(profiler) // Only returns on error
-		l.Warnln("Block profiler failed:", err)
+		slog.Error("Block profiler failed", slogutil.Error(err))
 		panic("Block profiler failed")
 	}()
 }

cmd/syncthing/cli/client.go

@@ -32,6 +32,7 @@ type APIClient interface {
 
 type apiClient struct {
 	http.Client
+
 	cfg    config.GUIConfiguration
 	apikey string
 }
@@ -91,11 +92,11 @@ func loadGUIConfig() (config.GUIConfiguration, error) {
 	guiCfg := cfg.GUI()
 
 	if guiCfg.Address() == "" {
-		return config.GUIConfiguration{}, errors.New("Could not find GUI Address")
+		return config.GUIConfiguration{}, errors.New("could not find GUI Address")
 	}
 
 	if guiCfg.APIKey == "" {
-		return config.GUIConfiguration{}, errors.New("Could not find GUI API key")
+		return config.GUIConfiguration{}, errors.New("could not find GUI API key")
 	}
 
 	return guiCfg, nil
@@ -113,7 +114,7 @@ func (c *apiClient) Endpoint() string {
 }
 
 func (c *apiClient) Do(req *http.Request) (*http.Response, error) {
-	req.Header.Set("X-API-Key", c.apikey)
+	req.Header.Set("X-Api-Key", c.apikey)
 	resp, err := c.Client.Do(req)
 	if err != nil {
 		return nil, err

cmd/syncthing/cli/config.go

@@ -10,6 +10,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"net/http"
 	"reflect"
 
 	"github.com/AudriusButkevicius/recli"
@@ -18,6 +19,53 @@ import (
 	"github.com/urfave/cli"
 )
 
+// Try to mimic the kong output format through custom help templates
+var customAppHelpTemplate = `Usage: {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}}{{if .Commands}} <command> [flags]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}
+
+{{.Description}}{{if .VisibleFlags}}
+
+Flags:
+  {{range $index, $option := .VisibleFlags}}{{if $index}}
+  {{end}}{{$option}}{{end}}{{end}}{{if .VisibleCommands}}
+
+Commands:{{range .VisibleCategories}}{{if .Name}}
+
+  {{.Name}}:{{range .VisibleCommands}}
+    {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{else}}{{range .VisibleCommands}}
+  {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{end}}{{end}}{{end}}
+`
+
+var customCommandHelpTemplate = `Usage: {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}}{{if .VisibleFlags}} [flags]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}
+
+{{.Usage}}{{if .VisibleFlags}}
+
+Flags:
+  {{range $index, $option := .VisibleFlags}}{{if $index}}
+  {{end}}{{$option}}{{end}}{{end}}{{if .Category}}
+
+Category:
+  {{.Category}}{{end}}{{if .Description}}
+
+{{.Description}}{{end}}
+`
+
+var customSubcommandHelpTemplate = `Usage: {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}} <command>{{if .VisibleFlags}} [flags]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Description}}
+
+{{.Description}}{{else}}{{if .Usage}}
+
+{{.Usage}}{{end}}{{end}}{{if .VisibleFlags}}
+
+Flags:
+  {{range $index, $option := .VisibleFlags}}{{if $index}}
+  {{end}}{{$option}}{{end}}{{end}}{{if .VisibleCommands}}
+
+Commands:{{range .VisibleCategories}}{{if .Name}}
+
+  {{.Name}}:{{range .VisibleCommands}}
+    {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{else}}{{range .VisibleCommands}}
+  {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{end}}{{end}}{{end}}
+`
+
 type configHandler struct {
 	original, cfg config.Configuration
 	client        APIClient
@@ -28,13 +76,18 @@ type configCommand struct {
 	Args []string `arg:"" default:"-h"`
 }
 
-func (c *configCommand) Run(ctx Context, _ *kong.Context) error {
+func (c *configCommand) Run(ctx Context, outerCtx *kong.Context) error {
 	app := cli.NewApp()
-	app.Name = "syncthing"
-	app.Author = "The Syncthing Authors"
+	app.Name = "syncthing cli config"
+	app.HelpName = "syncthing cli config"
+	app.Description = outerCtx.Selected().Help
 	app.Metadata = map[string]interface{}{
 		"clientFactory": ctx.clientFactory,
 	}
+	app.CustomAppHelpTemplate = customAppHelpTemplate
+	// Override global templates, as this is out only usage of the package
+	cli.CommandHelpTemplate = customCommandHelpTemplate
+	cli.SubcommandHelpTemplate = customSubcommandHelpTemplate
 
 	h := new(configHandler)
 	h.client, h.err = ctx.clientFactory.getClient()
@@ -55,6 +108,8 @@ func (c *configCommand) Run(ctx Context, _ *kong.Context) error {
 
 	app.Commands = commands
 	app.HideHelp = true
+	// Explicitly re-add help only as flags, not as commands
+	app.Flags = []cli.Flag{cli.HelpFlag}
 	app.Before = h.configBefore
 	app.After = h.configAfter
 
@@ -86,7 +141,7 @@ func (h *configHandler) configAfter(_ *cli.Context) error {
 	if err != nil {
 		return err
 	}
-	if resp.StatusCode != 200 {
+	if resp.StatusCode != http.StatusOK {
 		body, err := responseToBArray(resp)
 		if err != nil {
 			return err

cmd/syncthing/cli/errors.go

@@ -9,6 +9,7 @@ package cli
 import (
 	"errors"
 	"fmt"
+	"net/http"
 	"strings"
 
 	"github.com/alecthomas/kong"
@@ -34,7 +35,7 @@ func (e *errorsPushCommand) Run(ctx Context) error {
 	if err != nil {
 		return err
 	}
-	if response.StatusCode != 200 {
+	if response.StatusCode != http.StatusOK {
 		errStr = fmt.Sprint("Failed to push error\nStatus code: ", response.StatusCode)
 		bytes, err := responseToBArray(response)
 		if err != nil {

cmd/syncthing/cli/operations.go

@@ -10,6 +10,7 @@ import (
 	"bufio"
 	"errors"
 	"fmt"
+	"net/http"
 	"path/filepath"
 
 	"github.com/alecthomas/kong"
@@ -63,7 +64,7 @@ func (f *folderOverrideCommand) Run(ctx Context) error {
 			if err != nil {
 				return err
 			}
-			if response.StatusCode != 200 {
+			if response.StatusCode != http.StatusOK {
 				errStr := fmt.Sprint("Failed to override changes\nStatus code: ", response.StatusCode)
 				bytes, err := responseToBArray(response)
 				if err != nil {

cmd/syncthing/cli/utils.go

@@ -131,15 +131,6 @@ func prettyPrintResponse(response *http.Response) error {
 	return prettyPrintJSON(data)
 }
 
-func nulString(bs []byte) string {
-	for i := range bs {
-		if bs[i] == 0 {
-			return string(bs[:i])
-		}
-	}
-	return string(bs)
-}
-
 func normalizePath(path string) string {
 	return filepath.ToSlash(filepath.Clean(path))
 }

cmd/syncthing/crash_reporting.go

@@ -11,12 +11,15 @@ import (
 	"context"
 	"crypto/sha256"
 	"fmt"
+	"log/slog"
 	"net/http"
 	"os"
 	"path/filepath"
-	"sort"
+	"slices"
 	"strings"
 	"time"
+
+	"github.com/syncthing/syncthing/internal/slogutil"
 )
 
 const (
@@ -28,16 +31,18 @@ const (
 // directory to the crash reporting server as urlBase. Uploads are attempted
 // with the newest log first.
 //
-// This can can block for a long time. The context can set a final deadline
+// This can block for a long time. The context can set a final deadline
 // for this.
 func uploadPanicLogs(ctx context.Context, urlBase, dir string) {
 	files, err := filepath.Glob(filepath.Join(dir, "panic-*.log"))
 	if err != nil {
-		l.Warnln("Failed to list panic logs:", err)
+		slog.ErrorContext(ctx, "Failed to list panic logs", slogutil.Error(err))
 		return
 	}
 
-	sort.Sort(sort.Reverse(sort.StringSlice(files)))
+	slices.SortFunc(files, func(a, b string) int {
+		return strings.Compare(b, a)
+	})
 	for _, file := range files {
 		if strings.Contains(file, ".reported.") {
 			// We've already sent this file. It'll be cleaned out at some
@@ -46,7 +51,7 @@ func uploadPanicLogs(ctx context.Context, urlBase, dir string) {
 		}
 
 		if err := uploadPanicLog(ctx, urlBase, file); err != nil {
-			l.Warnln("Reporting crash:", err)
+			slog.ErrorContext(ctx, "Reporting crash", slogutil.Error(err))
 		} else {
 			// Rename the log so we don't have to try to report it again. This
 			// succeeds, or it does not. There is no point complaining about it.
@@ -69,7 +74,7 @@ func uploadPanicLog(ctx context.Context, urlBase, file string) error {
 	data = filterLogLines(data)
 
 	hash := fmt.Sprintf("%x", sha256.Sum256(data))
-	l.Infof("Reporting crash found in %s (report ID %s) ...\n", filepath.Base(file), hash[:8])
+	slog.InfoContext(ctx, "Reporting crash", slogutil.FilePath(filepath.Base(file)), slog.String("id", hash[:8]))
 
 	url := fmt.Sprintf("%s/%s", urlBase, hash)
 	headReq, err := http.NewRequest(http.MethodHead, url, nil)

cmd/syncthing/debug.go

@@ -6,8 +6,6 @@
 
 package main
 
-import (
-	"github.com/syncthing/syncthing/lib/logger"
-)
+import "github.com/syncthing/syncthing/internal/slogutil"
 
-var l = logger.DefaultLogger.NewFacility("main", "Main package")
+func init() { slogutil.RegisterPackage("Main package") }

cmd/syncthing/generate/generate.go

@@ -12,25 +12,24 @@ import (
 	"context"
 	"crypto/tls"
 	"fmt"
+	"log/slog"
 	"os"
 
 	"github.com/syncthing/syncthing/lib/config"
 	"github.com/syncthing/syncthing/lib/events"
 	"github.com/syncthing/syncthing/lib/fs"
 	"github.com/syncthing/syncthing/lib/locations"
-	"github.com/syncthing/syncthing/lib/logger"
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/syncthing"
 )
 
 type CLI struct {
-	GUIUser         string `placeholder:"STRING" help:"Specify new GUI authentication user name"`
-	GUIPassword     string `placeholder:"STRING" help:"Specify new GUI authentication password (use - to read from standard input)"`
-	NoDefaultFolder bool   `help:"Don't create the \"default\" folder on first startup" env:"STNODEFAULTFOLDER"`
-	NoPortProbing   bool   `help:"Don't try to find free ports for GUI and listen addresses on first startup" env:"STNOPORTPROBING"`
+	GUIUser       string `placeholder:"STRING" help:"Specify new GUI authentication user name"`
+	GUIPassword   string `placeholder:"STRING" help:"Specify new GUI authentication password (use - to read from standard input)"`
+	NoPortProbing bool   `help:"Don't try to find free ports for GUI and listen addresses on first startup" env:"STNOPORTPROBING"`
 }
 
-func (c *CLI) Run(l logger.Logger) error {
+func (c *CLI) Run() error {
 	// Support reading the password from a pipe or similar
 	if c.GUIPassword == "-" {
 		reader := bufio.NewReader(os.Stdin)
@@ -41,13 +40,13 @@ func (c *CLI) Run(l logger.Logger) error {
 		c.GUIPassword = string(password)
 	}
 
-	if err := Generate(l, locations.GetBaseDir(locations.ConfigBaseDir), c.GUIUser, c.GUIPassword, c.NoDefaultFolder, c.NoPortProbing); err != nil {
+	if err := Generate(locations.GetBaseDir(locations.ConfigBaseDir), c.GUIUser, c.GUIPassword, c.NoPortProbing); err != nil {
 		return fmt.Errorf("failed to generate config and keys: %w", err)
 	}
 	return nil
 }
 
-func Generate(l logger.Logger, confDir, guiUser, guiPassword string, noDefaultFolder, skipPortProbing bool) error {
+func Generate(confDir, guiUser, guiPassword string, skipPortProbing bool) error {
 	dir, err := fs.ExpandTilde(confDir)
 	if err != nil {
 		return err
@@ -62,20 +61,21 @@ func Generate(l logger.Logger, confDir, guiUser, guiPassword string, noDefaultFo
 	certFile, keyFile := locations.Get(locations.CertFile), locations.Get(locations.KeyFile)
 	cert, err := tls.LoadX509KeyPair(certFile, keyFile)
 	if err == nil {
-		l.Warnln("Key exists; will not overwrite.")
+		slog.Warn("Key exists; will not overwrite")
 	} else {
 		cert, err = syncthing.GenerateCertificate(certFile, keyFile)
 		if err != nil {
 			return fmt.Errorf("create certificate: %w", err)
 		}
 	}
+
 	myID = protocol.NewDeviceID(cert.Certificate[0])
-	l.Infoln("Device ID:", myID)
+	slog.Info("Calculated device ID", slog.String("device", myID.String()))
 
 	cfgFile := locations.Get(locations.ConfigFile)
 	cfg, _, err := config.Load(cfgFile, myID, events.NoopLogger)
 	if fs.IsNotExist(err) {
-		if cfg, err = syncthing.DefaultConfig(cfgFile, myID, events.NoopLogger, noDefaultFolder, skipPortProbing); err != nil {
+		if cfg, err = syncthing.DefaultConfig(cfgFile, myID, events.NoopLogger, skipPortProbing); err != nil {
 			return fmt.Errorf("create config: %w", err)
 		}
 	} else if err != nil {
@@ -88,7 +88,7 @@ func Generate(l logger.Logger, confDir, guiUser, guiPassword string, noDefaultFo
 
 	var updateErr error
 	waiter, err := cfg.Modify(func(cfg *config.Configuration) {
-		updateErr = updateGUIAuthentication(l, &cfg.GUI, guiUser, guiPassword)
+		updateErr = updateGUIAuthentication(&cfg.GUI, guiUser, guiPassword)
 	})
 	if err != nil {
 		return fmt.Errorf("modify config: %w", err)
@@ -104,17 +104,17 @@ func Generate(l logger.Logger, confDir, guiUser, guiPassword string, noDefaultFo
 	return nil
 }
 
-func updateGUIAuthentication(l logger.Logger, guiCfg *config.GUIConfiguration, guiUser, guiPassword string) error {
+func updateGUIAuthentication(guiCfg *config.GUIConfiguration, guiUser, guiPassword string) error {
 	if guiUser != "" && guiCfg.User != guiUser {
 		guiCfg.User = guiUser
-		l.Infoln("Updated GUI authentication user name:", guiUser)
+		slog.Info("Updated GUI authentication user", "name", guiUser)
 	}
 
 	if guiPassword != "" && guiCfg.Password != guiPassword {
 		if err := guiCfg.SetPassword(guiPassword); err != nil {
 			return fmt.Errorf("failed to set GUI authentication password: %w", err)
 		}
-		l.Infoln("Updated GUI authentication password.")
+		slog.Info("Updated GUI authentication password")
 	}
 	return nil
 }

cmd/syncthing/heapprof.go

@@ -8,18 +8,21 @@ package main
 
 import (
 	"fmt"
+	"log/slog"
 	"os"
 	"runtime"
 	"runtime/pprof"
 	"syscall"
 	"time"
+
+	"github.com/syncthing/syncthing/internal/slogutil"
 )
 
 func startHeapProfiler() {
-	l.Debugln("Starting heap profiling")
+	slog.Debug("Starting heap profiling")
 	go func() {
 		err := saveHeapProfiles(1) // Only returns on error
-		l.Warnln("Heap profiler failed:", err)
+		slog.Error("Heap profiler failed", slogutil.Error(err))
 		panic("Heap profiler failed")
 	}()
 }

cmd/syncthing/main.go

@@ -8,12 +8,14 @@ package main
 
 import (
 	"bytes"
+	"cmp"
 	"context"
 	"crypto/tls"
 	"errors"
 	"fmt"
 	"io"
-	"log"
+	"log/slog"
+	"maps"
 	"net/http"
 	_ "net/http/pprof" // Need to import this to support STPROFILER.
 	"net/url"
@@ -22,11 +24,11 @@ import (
 	"path"
 	"path/filepath"
 	"regexp"
-	"runtime"
 	"runtime/pprof"
-	"sort"
+	"slices"
 	"strconv"
 	"syscall"
+	"text/tabwriter"
 	"time"
 
 	"github.com/alecthomas/kong"
@@ -38,14 +40,14 @@ import (
 	"github.com/syncthing/syncthing/cmd/syncthing/decrypt"
 	"github.com/syncthing/syncthing/cmd/syncthing/generate"
 	"github.com/syncthing/syncthing/internal/db"
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
+	"github.com/syncthing/syncthing/internal/db/sqlite"
+	"github.com/syncthing/syncthing/internal/slogutil"
 	"github.com/syncthing/syncthing/lib/build"
 	"github.com/syncthing/syncthing/lib/config"
 	"github.com/syncthing/syncthing/lib/dialer"
 	"github.com/syncthing/syncthing/lib/events"
 	"github.com/syncthing/syncthing/lib/fs"
 	"github.com/syncthing/syncthing/lib/locations"
-	"github.com/syncthing/syncthing/lib/logger"
 	"github.com/syncthing/syncthing/lib/osutil"
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/svcutil"
@@ -59,20 +61,8 @@ const (
 
 const (
 	extraUsage = `
-The --logflags value is a sum of the following:
-
-   1  Date
-   2  Time
-   4  Microsecond time
-   8  Long filename
-  16  Short filename
-
-I.e. to prefix each log line with time and filename, set --logflags=18 (2 + 16
-from above). The value 0 is used to disable all of the above. The default is
-to show date and time (3).
-
 Logging always happens to the command line (stdout) and optionally to the
-file at the path specified by --logfile=path. In addition to an path, the special
+file at the path specified by --log-file=path. In addition to an path, the special
 values "default" and "-" may be used. The former logs to DATADIR/syncthing.log
 (see --data), which is the default on Windows, and the latter only to stdout,
 no file, which is the default anywhere else.
@@ -85,11 +75,10 @@ The following environment variables modify Syncthing's behavior in ways that
 are mostly useful for developers. Use with care. See also the --debug-* options
 above.
 
- STTRACE           A comma separated string of facilities to trace. The valid
-                   facility strings are listed below.
-
- STLOCKTHRESHOLD   Used for debugging internal deadlocks; sets debug
-                   sensitivity.  Use only under direction of a developer.
+ STTRACE           A comma separated string of packages to trace or change log
+                   level for. The valid package strings are listed below. A log
+                   level (DEBUG, INFO, WARN or ERROR) can be added after each
+                   package, separated by a colon. Ex: "model:WARN,nat:DEBUG".
 
  STVERSIONEXTRA    Add extra information to the version string in logs and the
                    version line in the GUI. Can be set to the name of a wrapper
@@ -104,8 +93,8 @@ above.
                    of CPU usage (i.e. performance).
 
 
-Debugging Facilities
---------------------
+Logging Facilities
+------------------
 
 The following are valid values for the STTRACE variable:
 
@@ -132,9 +121,10 @@ type CLI struct {
 	// subcommands. Their settings take effect on the `locations` package by
 	// way of the command line parser, so anything using `locations.Get` etc
 	// will be doing the right thing.
-	ConfDir string `name:"config" short:"C" placeholder:"PATH" env:"STCONFDIR" help:"Set configuration directory (config and keys)"`
-	DataDir string `name:"data" short:"D" placeholder:"PATH" env:"STDATADIR" help:"Set data directory (database and logs)"`
-	HomeDir string `name:"home" short:"H" placeholder:"PATH" env:"STHOMEDIR" help:"Set configuration and data directory"`
+	ConfDir     string `name:"config" short:"C" placeholder:"PATH" env:"STCONFDIR" help:"Set configuration directory (config and keys)"`
+	DataDir     string `name:"data" short:"D" placeholder:"PATH" env:"STDATADIR" help:"Set data directory (database and logs)"`
+	HomeDir     string `name:"home" short:"H" placeholder:"PATH" env:"STHOMEDIR" help:"Set configuration and data directory"`
+	VersionFlag bool   `name:"version" help:"Show current version, then exit"`
 
 	Serve serveCmd `cmd:"" help:"Run Syncthing (default)" default:"withargs"`
 	CLI   cli.CLI  `cmd:"" help:"Command line interface for Syncthing"`
@@ -164,22 +154,24 @@ type serveCmd struct {
 	AllowNewerConfig          bool          `help:"Allow loading newer than current config version" env:"STALLOWNEWERCONFIG"`
 	Audit                     bool          `help:"Write events to audit file" env:"STAUDIT"`
 	AuditFile                 string        `name:"auditfile" help:"Specify audit file (use \"-\" for stdout, \"--\" for stderr)" placeholder:"PATH" env:"STAUDITFILE"`
-	DBMaintenanceInterval     time.Duration `help:"Database maintenance interval" default:"8h" env:"STDBMAINTENANCEINTERVAL"`
-	DBDeleteRetentionInterval time.Duration `help:"Database deleted item retention interval" default:"4320h" env:"STDBDELETERETENTIONINTERVAL"`
+	DBMaintenanceInterval     time.Duration `help:"Database maintenance interval; set to zero to disable periodic maintenance" default:"8h" env:"STDBMAINTENANCEINTERVAL"`
+	DBDeleteRetentionInterval time.Duration `help:"Database deleted item retention interval" default:"10920h" env:"STDBDELETERETENTIONINTERVAL"`
 	GUIAddress                string        `name:"gui-address" help:"Override GUI address (e.g. \"http://192.0.2.42:8443\")" placeholder:"URL" env:"STGUIADDRESS"`
 	GUIAPIKey                 string        `name:"gui-apikey" help:"Override GUI API key" placeholder:"API-KEY" env:"STGUIAPIKEY"`
-	LogFile                   string        `name:"logfile" help:"Log file name (see below)" default:"${logFile}" placeholder:"PATH" env:"STLOGFILE"`
-	LogFlags                  int           `name:"logflags" help:"Select information in log line prefix (see below)" default:"${logFlags}" placeholder:"BITS" env:"STLOGFLAGS"`
+	LogFile                   string        `name:"log-file" aliases:"logfile" help:"Log file name (see below)" default:"${logFile}" placeholder:"PATH" env:"STLOGFILE"`
+	LogFlags                  int           `name:"logflags" help:"Deprecated option that does nothing, kept for compatibility" hidden:""`
+	LogLevel                  slog.Level    `help:"Log level for all packages (DEBUG,INFO,WARN,ERROR)" env:"STLOGLEVEL" default:"INFO"`
 	LogMaxFiles               int           `name:"log-max-old-files" help:"Number of old files to keep (zero to keep only current)" default:"${logMaxFiles}" placeholder:"N" env:"STLOGMAXOLDFILES"`
 	LogMaxSize                int           `help:"Maximum size of any file (zero to disable log rotation)" default:"${logMaxSize}" placeholder:"BYTES" env:"STLOGMAXSIZE"`
+	LogFormatTimestamp        string        `name:"log-format-timestamp" help:"Format for timestamp, set to empty to disable timestamps" env:"STLOGFORMATTIMESTAMP" default:"${timestampFormat}"`
+	LogFormatLevelString      bool          `name:"log-format-level-string" help:"Whether to include level string in log line" env:"STLOGFORMATLEVELSTRING" default:"${levelString}" negatable:""`
+	LogFormatLevelSyslog      bool          `name:"log-format-level-syslog" help:"Whether to include level as syslog prefix in log line" env:"STLOGFORMATLEVELSYSLOG" default:"${levelSyslog}" negatable:""`
 	NoBrowser                 bool          `help:"Do not start browser" env:"STNOBROWSER"`
-	NoDefaultFolder           bool          `help:"Don't create the \"default\" folder on first startup" env:"STNODEFAULTFOLDER"`
 	NoPortProbing             bool          `help:"Don't try to find free ports for GUI and listen addresses on first startup" env:"STNOPORTPROBING"`
 	NoRestart                 bool          `help:"Do not restart Syncthing when exiting due to API/GUI command, upgrade, or crash" env:"STNORESTART"`
 	NoUpgrade                 bool          `help:"Disable automatic upgrades" env:"STNOUPGRADE"`
 	Paused                    bool          `help:"Start with all devices and folders paused" env:"STPAUSED"`
 	Unpaused                  bool          `help:"Start with all devices and folders unpaused" env:"STUNPAUSED"`
-	Verbose                   bool          `help:"Print verbose log output" env:"STVERBOSE"`
 
 	// Debug options below
 	DebugGUIAssetsDir   string `help:"Directory to load GUI assets from" placeholder:"PATH" env:"STGUIASSETS"`
@@ -196,14 +188,12 @@ type serveCmd struct {
 }
 
 func defaultVars() kong.Vars {
-	vars := kong.Vars{}
-
-	vars["logFlags"] = strconv.Itoa(logger.DefaultFlags)
-	vars["logMaxSize"] = strconv.Itoa(10 << 20) // 10 MiB
-	vars["logMaxFiles"] = "3"                   // plus the current one
-
-	if os.Getenv("STTRACE") != "" {
-		vars["logFlags"] = strconv.Itoa(logger.DebugFlags)
+	vars := kong.Vars{
+		"logMaxSize":      strconv.Itoa(10 << 20), // 10 MiB
+		"logMaxFiles":     "3",                    // plus the current one
+		"levelString":     strconv.FormatBool(slogutil.DefaultLineFormat.LevelString),
+		"levelSyslog":     strconv.FormatBool(slogutil.DefaultLineFormat.LevelSyslog),
+		"timestampFormat": slogutil.DefaultLineFormat.TimestampFormat,
 	}
 
 	// On non-Windows, we explicitly default to "-" which means stdout. On
@@ -233,13 +223,19 @@ func main() {
 		defaultVars(),
 	)
 	if err != nil {
-		log.Fatal(err)
+		slog.Error("Parsing startup", slogutil.Error(err))
+		os.Exit(svcutil.ExitError.AsInt())
 	}
 
 	kongplete.Complete(parser)
 	ctx, err := parser.Parse(os.Args[1:])
 	parser.FatalIfErrorf(err)
-	ctx.BindTo(l, (*logger.Logger)(nil)) // main logger available to subcommands
+
+	if entrypoint.VersionFlag {
+		_ = versionCmd{}.Run()
+		return
+	}
+
 	err = ctx.Run()
 	parser.FatalIfErrorf(err)
 }
@@ -251,15 +247,13 @@ func helpHandler(options kong.HelpOptions, ctx *kong.Context) error {
 	if ctx.Command() == "serve" {
 		// Help was requested for `syncthing serve`, so we add our extra
 		// usage info afte the normal options output.
-		fmt.Printf(extraUsage, debugFacilities())
+		fmt.Printf(extraUsage, logPackages())
 	}
 	return nil
 }
 
 // serveCmd.Run() is the entrypoint for `syncthing serve`
 func (c *serveCmd) Run() error {
-	l.SetFlags(c.LogFlags)
-
 	if c.GUIAddress != "" {
 		// The config picks this up from the environment.
 		os.Setenv("STGUIADDRESS", c.GUIAddress)
@@ -273,6 +267,15 @@ func (c *serveCmd) Run() error {
 		osutil.HideConsole()
 	}
 
+	// Customize the logging early
+	slogutil.SetLineFormat(slogutil.LineFormat{
+		TimestampFormat: c.LogFormatTimestamp,
+		LevelString:     c.LogFormatLevelString,
+		LevelSyslog:     c.LogFormatLevelSyslog,
+	})
+	slogutil.SetDefaultLevel(c.LogLevel)
+	slogutil.SetLevelOverrides(os.Getenv("STTRACE"))
+
 	// Treat an explicitly empty log file name as no log file
 	if c.LogFile == "" {
 		c.LogFile = "-"
@@ -280,7 +283,7 @@ func (c *serveCmd) Run() error {
 	if c.LogFile != "default" {
 		// We must set this *after* expandLocations above.
 		if err := locations.Set(locations.LogFile, c.LogFile); err != nil {
-			l.Warnln("Setting log file path:", err)
+			slog.Error("Failed to set log file path", slogutil.Error(err))
 			os.Exit(svcutil.ExitError.AsInt())
 		}
 	}
@@ -289,15 +292,17 @@ func (c *serveCmd) Run() error {
 		// The asset dir is blank if STGUIASSETS wasn't set, in which case we
 		// should look for extra assets in the default place.
 		if err := locations.Set(locations.GUIAssets, c.DebugGUIAssetsDir); err != nil {
-			l.Warnln("Setting GUI assets path:", err)
+			slog.Error("Failed to set GUI assets path", slogutil.Error(err))
 			os.Exit(svcutil.ExitError.AsInt())
 		}
 	}
 
-	// Ensure that our home directory exists.
-	if err := syncthing.EnsureDir(locations.GetBaseDir(locations.ConfigBaseDir), 0o700); err != nil {
-		l.Warnln("Failure on home directory:", err)
-		os.Exit(svcutil.ExitError.AsInt())
+	// Ensure that our config and data directories exist.
+	for _, loc := range []locations.BaseDirEnum{locations.ConfigBaseDir, locations.DataBaseDir} {
+		if err := syncthing.EnsureDir(locations.GetBaseDir(loc), 0o700); err != nil {
+			slog.Error("Failed to ensure directory exists", slogutil.Error(err))
+			os.Exit(svcutil.ExitError.AsInt())
+		}
 	}
 
 	if c.InternalInnerProcess {
@@ -318,29 +323,27 @@ func openGUI() error {
 			return err
 		}
 	} else {
-		l.Warnln("Browser: GUI is currently disabled")
+		slog.Error("Browser: GUI is currently disabled")
 	}
 	return nil
 }
 
-func debugFacilities() string {
-	facilities := l.Facilities()
+func logPackages() string {
+	packages := slogutil.PackageDescrs()
 
 	// Get a sorted list of names
-	var names []string
+	names := slices.Sorted(maps.Keys(packages))
 	maxLen := 0
-	for name := range facilities {
-		names = append(names, name)
+	for _, name := range names {
 		if len(name) > maxLen {
 			maxLen = len(name)
 		}
 	}
-	sort.Strings(names)
 
 	// Format the choices
 	b := new(bytes.Buffer)
 	for _, name := range names {
-		fmt.Fprintf(b, " %-*s - %s\n", maxLen, name, facilities[name])
+		fmt.Fprintf(b, " %-*s - %s\n", maxLen, name, packages[name])
 	}
 	return b.String()
 }
@@ -368,7 +371,7 @@ func checkUpgrade() (upgrade.Release, error) {
 		return upgrade.Release{}, &errNoUpgrade{build.Version, release.Tag}
 	}
 
-	l.Infof("Upgrade available (current %q < latest %q)", build.Version, release.Tag)
+	slog.Info("Upgrade available", "current", build.Version, "latest", release.Tag)
 	return release, nil
 }
 
@@ -384,8 +387,8 @@ func upgradeViaRest() error {
 	}
 	u.Path = path.Join(u.Path, "rest/system/upgrade")
 	target := u.String()
-	r, _ := http.NewRequest("POST", target, nil)
-	r.Header.Set("X-API-Key", cfg.GUI().APIKey)
+	r, _ := http.NewRequest(http.MethodPost, target, nil)
+	r.Header.Set("X-Api-Key", cfg.GUI().APIKey)
 
 	tr := &http.Transport{
 		DialContext:     dialer.DialContext,
@@ -400,9 +403,11 @@ func upgradeViaRest() error {
 	if err != nil {
 		return err
 	}
-	if resp.StatusCode != 200 {
+
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
 		bs, err := io.ReadAll(resp.Body)
-		defer resp.Body.Close()
 		if err != nil {
 			return err
 		}
@@ -423,13 +428,9 @@ func (c *serveCmd) syncthingMain() {
 		startPerfStats()
 	}
 
-	// Set a log prefix similar to the ID we will have later on, or early log
-	// lines look ugly.
-	l.SetPrefix("[start] ")
-
 	// Print our version information up front, so any crash that happens
 	// early etc. will have it available.
-	l.Infoln(build.LongVersion)
+	slog.Info(build.LongVersion) //nolint:sloglint
 
 	// Ensure that we have a certificate and key.
 	cert, err := syncthing.LoadOrGenerateCertificate(
@@ -437,18 +438,18 @@ func (c *serveCmd) syncthingMain() {
 		locations.Get(locations.KeyFile),
 	)
 	if err != nil {
-		l.Warnln("Failed to load/generate certificate:", err)
+		slog.Error("Failed to load/generate certificate", slogutil.Error(err))
 		os.Exit(1)
 	}
 
 	// Ensure we are the only running instance
-	lf := flock.New(locations.Get(locations.CertFile))
+	lf := flock.New(locations.Get(locations.LockFile))
 	locked, err := lf.TryLock()
 	if err != nil {
-		l.Warnln("Failed to acquire lock:", err)
+		slog.Error("Failed to acquire lock", slogutil.Error(err))
 		os.Exit(1)
 	} else if !locked {
-		l.Warnln("Failed to acquire lock: is another Syncthing instance already running?")
+		slog.Error("Failed to acquire lock: is another Syncthing instance already running?")
 		os.Exit(1)
 	}
 
@@ -457,19 +458,20 @@ func (c *serveCmd) syncthingMain() {
 
 	// earlyService is a supervisor that runs the services needed for or
 	// before app startup; the event logger, and the config service.
-	spec := svcutil.SpecWithDebugLogger(l)
+	spec := svcutil.SpecWithDebugLogger()
 	earlyService := suture.New("early", spec)
 	earlyService.ServeBackground(ctx)
 
 	evLogger := events.NewLogger()
 	earlyService.Add(evLogger)
 
-	cfgWrapper, err := syncthing.LoadConfigAtStartup(locations.Get(locations.ConfigFile), cert, evLogger, c.AllowNewerConfig, c.NoDefaultFolder, c.NoPortProbing)
+	cfgWrapper, err := syncthing.LoadConfigAtStartup(locations.Get(locations.ConfigFile), cert, evLogger, c.AllowNewerConfig, c.NoPortProbing)
 	if err != nil {
-		l.Warnln("Failed to initialize config:", err)
+		slog.Error("Failed to initialize config", slogutil.Error(err))
 		os.Exit(svcutil.ExitError.AsInt())
 	}
 	earlyService.Add(cfgWrapper)
+	config.RegisterInfoMetrics(cfgWrapper)
 
 	// Candidate builds should auto upgrade. Make sure the option is set,
 	// unless we are in a build where it's disabled or the STNOUPGRADE
@@ -477,7 +479,7 @@ func (c *serveCmd) syncthingMain() {
 
 	if build.IsCandidate && !upgrade.DisabledByCompilation && !c.NoUpgrade {
 		cfgWrapper.Modify(func(cfg *config.Configuration) {
-			l.Infoln("Automatic upgrade is always enabled for candidate releases.")
+			slog.Info("Automatic upgrade is always enabled for candidate releases")
 			if cfg.Options.AutoUpgradeIntervalH == 0 || cfg.Options.AutoUpgradeIntervalH > 24 {
 				cfg.Options.AutoUpgradeIntervalH = 12
 				// Set the option into the config as well, as the auto upgrade
@@ -488,17 +490,32 @@ func (c *serveCmd) syncthingMain() {
 		})
 	}
 
-	if err := syncthing.TryMigrateDatabase(c.DBDeleteRetentionInterval); err != nil {
-		l.Warnln("Failed to migrate old-style database:", err)
+	migratingAPICtx, migratingAPICancel := context.WithCancel(ctx)
+	if cfgWrapper.GUI().Enabled {
+		// Start a temporary API server during the migration. It will wait
+		// startDelay until actually starting, so that if we quickly pass
+		// through the migration steps (e.g., there was nothing to migrate)
+		// and cancel the context, it will never even start.
+		api := migratingAPI{
+			addr:       cfgWrapper.GUI().Address(),
+			startDelay: 5 * time.Second,
+		}
+		go api.Serve(migratingAPICtx)
+	}
+
+	if err := syncthing.TryMigrateDatabase(ctx, c.DBDeleteRetentionInterval); err != nil {
+		slog.Error("Failed to migrate old-style database", slogutil.Error(err))
 		os.Exit(1)
 	}
 
 	sdb, err := syncthing.OpenDatabase(locations.Get(locations.Database), c.DBDeleteRetentionInterval)
 	if err != nil {
-		l.Warnln("Error opening database:", err)
+		slog.Error("Error opening database", slogutil.Error(err))
 		os.Exit(1)
 	}
 
+	migratingAPICancel() // we're done with the temporary API server
+
 	// Check if auto-upgrades is possible, and if yes, and it's enabled do an initial
 	// upgrade immediately. The auto-upgrade routine can only be started
 	// later after App is initialised.
@@ -511,13 +528,14 @@ func (c *serveCmd) syncthingMain() {
 			err = upgrade.To(release)
 		}
 		if err != nil {
-			if _, ok := err.(*errNoUpgrade); ok || err == errTooEarlyUpgradeCheck || err == errTooEarlyUpgrade {
-				l.Debugln("Initial automatic upgrade:", err)
+			var noUpgradeErr *errNoUpgrade
+			if errors.As(err, &noUpgradeErr) || errors.Is(err, errTooEarlyUpgradeCheck) || errors.Is(err, errTooEarlyUpgrade) {
+				slog.Debug("Initial automatic upgrade", slogutil.Error(err))
 			} else {
-				l.Infoln("Initial automatic upgrade:", err)
+				slog.Info("Initial automatic upgrade", slogutil.Error(err))
 			}
 		} else {
-			l.Infof("Upgraded to %q, should exit now.", release.Tag)
+			slog.Info("Upgraded, should exit now", "newVersion", release.Tag)
 			os.Exit(svcutil.ExitUpgrade.AsInt())
 		}
 	}
@@ -532,16 +550,26 @@ func (c *serveCmd) syncthingMain() {
 		NoUpgrade:             c.NoUpgrade,
 		ProfilerAddr:          c.DebugProfilerListen,
 		ResetDeltaIdxs:        c.DebugResetDeltaIdxs,
-		Verbose:               c.Verbose,
 		DBMaintenanceInterval: c.DBMaintenanceInterval,
 	}
-	if c.Audit {
-		appOpts.AuditWriter = auditWriter(c.AuditFile)
+
+	if c.Audit || cfgWrapper.Options().AuditEnabled {
+		slog.Info("Auditing is enabled")
+
+		auditFile := cfgWrapper.Options().AuditFile
+
+		// Ignore config option if command-line option is set
+		if c.AuditFile != "" {
+			slog.Debug("Using the audit file from the command-line parameter", slogutil.FilePath(c.AuditFile))
+			auditFile = c.AuditFile
+		}
+
+		appOpts.AuditWriter = auditWriter(auditFile)
 	}
 
 	app, err := syncthing.New(cfgWrapper, sdb, evLogger, cert, appOpts)
 	if err != nil {
-		l.Warnln("Failed to start Syncthing:", err)
+		slog.Error("Failed to start Syncthing", slogutil.Error(err))
 		os.Exit(svcutil.ExitError.AsInt())
 	}
 
@@ -554,11 +582,11 @@ func (c *serveCmd) syncthingMain() {
 	if c.DebugProfileCPU {
 		f, err := os.Create(fmt.Sprintf("cpu-%d.pprof", os.Getpid()))
 		if err != nil {
-			l.Warnln("Creating profile:", err)
+			slog.Error("Failed to create profile", slogutil.Error(err))
 			os.Exit(svcutil.ExitError.AsInt())
 		}
 		if err := pprof.StartCPUProfile(f); err != nil {
-			l.Warnln("Starting profile:", err)
+			slog.Error("Failed to start profile", slogutil.Error(err))
 			os.Exit(svcutil.ExitError.AsInt())
 		}
 	}
@@ -578,14 +606,17 @@ func (c *serveCmd) syncthingMain() {
 	status := app.Wait()
 
 	if status == svcutil.ExitError {
-		l.Warnln("Syncthing stopped with error:", app.Error())
+		slog.Error("Syncthing stopped with error", slogutil.Error(app.Error()))
 	}
 
 	if c.DebugProfileCPU {
 		pprof.StopCPUProfile()
 	}
 
-	runtime.KeepAlive(lf) // ensure lock is still held to this point
+	// Best effort remove lockfile, doesn't matter if it succeeds
+	_ = lf.Unlock()
+	_ = os.Remove(locations.Get(locations.LockFile))
+
 	os.Exit(int(status))
 }
 
@@ -593,8 +624,7 @@ func setupSignalHandling(app *syncthing.App) {
 	// Exit cleanly with "restarting" code on SIGHUP.
 
 	restartSign := make(chan os.Signal, 1)
-	sigHup := syscall.Signal(1)
-	signal.Notify(restartSign, sigHup)
+	signal.Notify(restartSign, syscall.SIGHUP)
 	go func() {
 		<-restartSign
 		app.Stop(svcutil.ExitRestart)
@@ -629,13 +659,14 @@ func auditWriter(auditFile string) io.Writer {
 	var auditDest string
 	var auditFlags int
 
-	if auditFile == "-" {
+	switch auditFile {
+	case "-":
 		fd = os.Stdout
 		auditDest = "stdout"
-	} else if auditFile == "--" {
+	case "--":
 		fd = os.Stderr
 		auditDest = "stderr"
-	} else {
+	default:
 		if auditFile == "" {
 			auditFile = locations.GetTimestamped(locations.AuditLog)
 			auditFlags = os.O_WRONLY | os.O_CREATE | os.O_EXCL
@@ -644,13 +675,13 @@ func auditWriter(auditFile string) io.Writer {
 		}
 		fd, err = os.OpenFile(auditFile, auditFlags, 0o600)
 		if err != nil {
-			l.Warnln("Audit:", err)
+			slog.Error("Failed to open audit file", slogutil.Error(err))
 			os.Exit(svcutil.ExitError.AsInt())
 		}
 		auditDest = auditFile
 	}
 
-	l.Infoln("Audit log in", auditDest)
+	slog.Info("Writing audit log", slogutil.FilePath(auditDest))
 
 	return fd
 }
@@ -660,7 +691,7 @@ func (c *serveCmd) autoUpgradePossible() bool {
 		return false
 	}
 	if c.NoUpgrade {
-		l.Infof("No automatic upgrades; STNOUPGRADE environment variable defined.")
+		slog.Info("No automatic upgrades; STNOUPGRADE environment variable defined")
 		return false
 	}
 	return true
@@ -677,7 +708,7 @@ func autoUpgrade(cfg config.Wrapper, app *syncthing.App, evLogger events.Logger)
 				continue
 			}
 			if cfg.Options().AutoUpgradeEnabled() {
-				l.Infof("Connected to device %s with a newer version (current %q < remote %q). Checking for upgrades.", data["id"], build.Version, data["clientVersion"])
+				slog.Info("Connected to device with a newer version; checking for upgrades", slog.String("device", data["id"]), slog.String("ourVersion", build.Version), slog.String("theirVersion", data["clientVersion"]))
 			}
 		case <-timer.C:
 		}
@@ -690,14 +721,14 @@ func autoUpgrade(cfg config.Wrapper, app *syncthing.App, evLogger events.Logger)
 
 		checkInterval := time.Duration(opts.AutoUpgradeIntervalH) * time.Hour
 		rel, err := upgrade.LatestRelease(opts.ReleasesURL, build.Version, opts.UpgradeToPreReleases)
-		if err == upgrade.ErrUpgradeUnsupported {
+		if errors.Is(err, upgrade.ErrUpgradeUnsupported) {
 			sub.Unsubscribe()
 			return
 		}
 		if err != nil {
 			// Don't complain too loudly here; we might simply not have
 			// internet connectivity, or the upgrade server might be down.
-			l.Infoln("Automatic upgrade:", err)
+			slog.Info("Automatic upgrade", slogutil.Error(err))
 			timer.Reset(checkInterval)
 			continue
 		}
@@ -708,16 +739,21 @@ func autoUpgrade(cfg config.Wrapper, app *syncthing.App, evLogger events.Logger)
 			continue
 		}
 
-		l.Infof("Automatic upgrade (current %q < latest %q)", build.Version, rel.Tag)
+		slog.Info("Automatic upgrade", "current", build.Version, "latest", rel.Tag)
 		err = upgrade.To(rel)
 		if err != nil {
-			l.Warnln("Automatic upgrade:", err)
+			slog.Error("Automatic upgrade failed", slogutil.Error(err))
 			timer.Reset(checkInterval)
 			continue
 		}
 		sub.Unsubscribe()
-		l.Warnf("Automatically upgraded to version %q. Restarting in 1 minute.", rel.Tag)
-		time.Sleep(time.Minute)
+		restartDelay := time.Minute
+		evLogger.Log(events.UpgradeRestartScheduled, map[string]any{
+			"delayS":     int(restartDelay / time.Second),
+			"newVersion": rel.Tag,
+		})
+		slog.Error("Automatically upgraded, restarting in 1 minute", slog.String("newVersion", rel.Tag))
+		time.Sleep(restartDelay)
 		app.Stop(svcutil.ExitUpgrade)
 		return
 	}
@@ -751,40 +787,39 @@ func initialAutoUpgradeCheck(misc *db.Typed) (upgrade.Release, error) {
 // suitable time after they have gone out of fashion.
 func cleanConfigDirectory() {
 	patterns := map[string]time.Duration{
-		"panic-*.log":        7 * 24 * time.Hour,  // keep panic logs for a week
-		"audit-*.log":        7 * 24 * time.Hour,  // keep audit logs for a week
-		"index":              14 * 24 * time.Hour, // keep old index format for two weeks
-		"index-v0.11.0.db":   14 * 24 * time.Hour, // keep old index format for two weeks
-		"index-v0.13.0.db":   14 * 24 * time.Hour, // keep old index format for two weeks
-		"index*.converted":   14 * 24 * time.Hour, // keep old converted indexes for two weeks
-		"config.xml.v*":      30 * 24 * time.Hour, // old config versions for a month
-		"*.idx.gz":           30 * 24 * time.Hour, // these should for sure no longer exist
-		"backup-of-v0.8":     30 * 24 * time.Hour, // these neither
-		"tmp-index-sorter.*": time.Minute,         // these should never exist on startup
-		"support-bundle-*":   30 * 24 * time.Hour, // keep old support bundle zip or folder for a month
-		"csrftokens.txt":     0,                   // deprecated, remove immediately
+		"panic-*.log":               7 * 24 * time.Hour,  // keep panic logs for a week
+		"audit-*.log":               7 * 24 * time.Hour,  // keep audit logs for a week
+		"index-v0.14.0.db-migrated": 14 * 24 * time.Hour, // keep old index format for two weeks
+		"config.xml.v*":             30 * 24 * time.Hour, // old config versions for a month
+		"support-bundle-*":          30 * 24 * time.Hour, // keep old support bundle zip or folder for a month
 	}
 
-	for pat, dur := range patterns {
-		fs := fs.NewFilesystem(fs.FilesystemTypeBasic, locations.GetBaseDir(locations.ConfigBaseDir))
-		files, err := fs.Glob(pat)
-		if err != nil {
-			l.Infoln("Cleaning:", err)
-			continue
-		}
-
-		for _, file := range files {
-			info, err := fs.Lstat(file)
+	locations := slices.Compact([]string{
+		locations.GetBaseDir(locations.ConfigBaseDir),
+		locations.GetBaseDir(locations.DataBaseDir),
+	})
+	for _, loc := range locations {
+		fs := fs.NewFilesystem(fs.FilesystemTypeBasic, loc)
+		for pat, dur := range patterns {
+			entries, err := fs.Glob(pat)
 			if err != nil {
-				l.Infoln("Cleaning:", err)
+				slog.Warn("Failed to clean config directory", slogutil.Error(err))
 				continue
 			}
 
-			if time.Since(info.ModTime()) > dur {
-				if err = fs.RemoveAll(file); err != nil {
-					l.Infoln("Cleaning:", err)
-				} else {
-					l.Infoln("Cleaned away old file", filepath.Base(file))
+			for _, entry := range entries {
+				info, err := fs.Lstat(entry)
+				if err != nil {
+					slog.Warn("Failed to clean config directory", slogutil.Error(err))
+					continue
+				}
+
+				if time.Since(info.ModTime()) > dur {
+					if err = fs.RemoveAll(entry); err != nil {
+						slog.Warn("Failed to clean config directory", slogutil.Error(err))
+					} else {
+						slog.Warn("Cleaned away old file", slogutil.FilePath(filepath.Base(entry)))
+					}
 				}
 			}
 		}
@@ -801,36 +836,19 @@ func setPauseState(cfgWrapper config.Wrapper, paused bool) {
 		}
 	})
 	if err != nil {
-		l.Warnln("Cannot adjust paused state:", err)
+		slog.Error("Cannot adjust paused state", slogutil.Error(err))
 		os.Exit(svcutil.ExitError.AsInt())
 	}
 }
 
 func exitCodeForUpgrade(err error) int {
-	if _, ok := err.(*errNoUpgrade); ok {
+	var noUpgradeErr *errNoUpgrade
+	if errors.As(err, &noUpgradeErr) {
 		return svcutil.ExitNoUpgradeAvailable.AsInt()
 	}
 	return svcutil.ExitError.AsInt()
 }
 
-// convertLegacyArgs returns the slice of arguments with single dash long
-// flags converted to double dash long flags.
-func convertLegacyArgs(args []string) []string {
-	// Legacy args begin with a single dash, followed by two or more characters.
-	legacyExp := regexp.MustCompile(`^-\w{2,}`)
-
-	res := make([]string, len(args))
-	for i, arg := range args {
-		if legacyExp.MatchString(arg) {
-			res[i] = "-" + arg
-		} else {
-			res[i] = arg
-		}
-	}
-
-	return res
-}
-
 type versionCmd struct{}
 
 func (versionCmd) Run() error {
@@ -846,7 +864,7 @@ func (deviceIDCmd) Run() error {
 		locations.Get(locations.KeyFile),
 	)
 	if err != nil {
-		l.Warnln("Error reading device ID:", err)
+		slog.Error("Failed to read device ID", slogutil.Error(err))
 		os.Exit(svcutil.ExitError.AsInt())
 	}
 
@@ -869,7 +887,7 @@ type upgradeCmd struct {
 func (u upgradeCmd) Run() error {
 	if u.CheckOnly {
 		if _, err := checkUpgrade(); err != nil {
-			l.Warnln("Checking for upgrade:", err)
+			slog.Error("Failed to check for upgrade", slogutil.Error(err))
 			os.Exit(exitCodeForUpgrade(err))
 		}
 		return nil
@@ -878,31 +896,40 @@ func (u upgradeCmd) Run() error {
 	if u.From != "" {
 		err := upgrade.ToURL(u.From)
 		if err != nil {
-			l.Warnln("Error while Upgrading:", err)
+			slog.Error("Failed to upgrade", slogutil.Error(err))
 			os.Exit(svcutil.ExitError.AsInt())
 		}
-		l.Infoln("Upgraded from", u.From)
+		slog.Info("Upgraded", "from", u.From)
 		return nil
 	}
 
 	release, err := checkUpgrade()
 	if err == nil {
-		lf := flock.New(locations.Get(locations.CertFile))
-		locked, err := lf.TryLock()
-		if err != nil {
-			l.Warnln("Upgrade:", err)
+		lf := flock.New(locations.Get(locations.LockFile))
+		var locked bool
+		locked, err = lf.TryLock()
+		// ErrNotExist is a valid error if this is a new/blank installation
+		// without a config dir, in which case we can proceed with a normal
+		// non-API upgrade.
+		switch {
+		case err != nil && !os.IsNotExist(err):
+			slog.Error("Failed to lock for upgrade", slogutil.Error(err))
 			os.Exit(1)
-		} else if locked {
-			err = upgradeViaRest()
-		} else {
+		case locked || os.IsNotExist(err):
+			// We got the lock, or the config directory didn't exist, so we
+			// can do a direct upgrade
 			err = upgrade.To(release)
+		default:
+			// We didn't get the lock, because Syncthing was running, so
+			// upgrade via REST.
+			err = upgradeViaRest()
 		}
 	}
 	if err != nil {
-		l.Warnln("Upgrade:", err)
+		slog.Error("Failed to check for upgrade", slogutil.Error(err))
 		os.Exit(exitCodeForUpgrade(err))
 	}
-	l.Infof("Upgraded to %q", release.Tag)
+	slog.Info("Upgraded", "to", release.Tag)
 	os.Exit(svcutil.ExitUpgrade.AsInt())
 	return nil
 }
@@ -911,28 +938,95 @@ type browserCmd struct{}
 
 func (browserCmd) Run() error {
 	if err := openGUI(); err != nil {
-		l.Warnln("Failed to open web UI:", err)
+		slog.Error("Failed to open web UI", slogutil.Error(err))
 		os.Exit(svcutil.ExitError.AsInt())
 	}
 	return nil
 }
 
 type debugCmd struct {
-	ResetDatabase resetDatabaseCmd `cmd:"" help:"Reset the database, forcing a full rescan and resync"`
+	ResetDatabase      resetDatabaseCmd  `cmd:"" help:"Reset the database, forcing a full rescan and resync"`
+	DatabaseStatistics databaseStatsCmd  `cmd:"" help:"Display database size statistics"`
+	DatabaseCounts     databaseCountsCmd `cmd:"" help:"Display database folder counts"`
+	DatabaseFile       databaseFileCmd   `cmd:"" help:"Display database file metadata"`
 }
 
 type resetDatabaseCmd struct{}
 
 func (resetDatabaseCmd) Run() error {
-	l.Infoln("Removing database in", locations.Get(locations.Database))
+	slog.Info("Removing database", slogutil.FilePath(locations.Get(locations.Database)))
 	if err := os.RemoveAll(locations.Get(locations.Database)); err != nil {
-		l.Warnln("Resetting database:", err)
+		slog.Error("Failed to reset database", slogutil.Error(err))
 		os.Exit(svcutil.ExitError.AsInt())
 	}
-	l.Infoln("Successfully reset database - it will be rebuilt after next start.")
+	slog.Info("Reset database - it will be rebuilt after next start")
 	return nil
 }
 
+type databaseStatsCmd struct{}
+
+func (c databaseStatsCmd) Run() error {
+	db, err := sqlite.Open(locations.Get(locations.Database))
+	if err != nil {
+		return err
+	}
+	ds, err := db.Statistics()
+	if err != nil {
+		return err
+	}
+
+	tw := tabwriter.NewWriter(os.Stdout, 2, 2, 2, ' ', 0)
+	hdr := fmt.Sprintf("%s\t%s\t%s\t%12s\t%7s\n", "DATABASE", "FOLDER ID", "TABLE", "SIZE", "FILL")
+	fmt.Fprint(tw, hdr)
+	fmt.Fprint(tw, regexp.MustCompile(`[A-Z]`).ReplaceAllString(hdr, "="))
+	c.printStat(tw, ds)
+	return tw.Flush()
+}
+
+type databaseCountsCmd struct {
+	Folder string `arg:"" required:""`
+}
+
+func (c databaseCountsCmd) Run() error {
+	db, err := sqlite.Open(locations.Get(locations.Database))
+	if err != nil {
+		return err
+	}
+
+	return db.DebugCounts(os.Stdout, c.Folder)
+}
+
+type databaseFileCmd struct {
+	Folder string `arg:"" required:""`
+	File   string `arg:"" required:""`
+}
+
+func (c databaseFileCmd) Run() error {
+	db, err := sqlite.Open(locations.Get(locations.Database))
+	if err != nil {
+		return err
+	}
+
+	return db.DebugFilePattern(os.Stdout, c.Folder, c.File)
+}
+
+func (c databaseStatsCmd) printStat(w io.Writer, s *sqlite.DatabaseStatistics) {
+	for _, table := range s.Tables {
+		fmt.Fprintf(w, "%s\t%s\t%s\t%8d KiB\t%5.01f %%\n", s.Name, cmp.Or(s.FolderID, "-"), table.Name, table.Size/1024, float64(table.Size-table.Unused)*100/float64(table.Size))
+	}
+	for _, next := range s.Children {
+		c.printStat(w, &next)
+		s.Total.Size += next.Total.Size
+		s.Total.Unused += next.Total.Unused
+	}
+
+	totalName := s.Name
+	if len(s.Children) > 0 {
+		totalName += " + children"
+	}
+	fmt.Fprintf(w, "%s\t%s\t%s\t%8d KiB\t%5.01f %%\n", totalName, cmp.Or(s.FolderID, "-"), "(total)", s.Total.Size/1024, float64(s.Total.Size-s.Total.Unused)*100/float64(s.Total.Size))
+}
+
 func setConfigDataLocationsFromFlags(homeDir, confDir, dataDir string) error {
 	homeSet := homeDir != ""
 	confSet := confDir != ""
@@ -954,3 +1048,32 @@ func setConfigDataLocationsFromFlags(homeDir, confDir, dataDir string) error {
 	}
 	return nil
 }
+
+type migratingAPI struct {
+	addr       string
+	startDelay time.Duration
+}
+
+func (m migratingAPI) Serve(ctx context.Context) error {
+	srv := &http.Server{
+		Addr: m.addr,
+		Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+			w.Write([]byte("*** Database migration in progress ***\n\n"))
+			for _, line := range slogutil.GlobalRecorder.Since(time.Time{}) {
+				_, _ = line.WriteTo(w, slogutil.DefaultLineFormat)
+			}
+		}),
+	}
+	go func() {
+		select {
+		case <-time.After(m.startDelay):
+			slog.InfoContext(ctx, "Starting temporary GUI/API during migration", slogutil.Address(m.addr))
+			err := srv.ListenAndServe()
+			slog.InfoContext(ctx, "Temporary GUI/API closed", slogutil.Address(m.addr), slogutil.Error(err))
+		case <-ctx.Done():
+		}
+	}()
+	<-ctx.Done()
+	return srv.Close()
+}

cmd/syncthing/monitor.go

@@ -9,28 +9,31 @@ package main
 import (
 	"bufio"
 	"context"
+	"errors"
 	"fmt"
 	"io"
+	"log/slog"
 	"os"
 	"os/exec"
 	"os/signal"
 	"path/filepath"
 	"strings"
+	"sync"
 	"syscall"
 	"time"
 
+	"github.com/syncthing/syncthing/internal/slogutil"
 	"github.com/syncthing/syncthing/lib/build"
 	"github.com/syncthing/syncthing/lib/fs"
 	"github.com/syncthing/syncthing/lib/locations"
 	"github.com/syncthing/syncthing/lib/osutil"
 	"github.com/syncthing/syncthing/lib/svcutil"
-	"github.com/syncthing/syncthing/lib/sync"
 )
 
 var (
 	stdoutFirstLines []string // The first 10 lines of stdout
 	stdoutLastLines  []string // The last 50 lines of stdout
-	stdoutMut        = sync.NewMutex()
+	stdoutMut        sync.Mutex
 )
 
 const (
@@ -44,8 +47,6 @@ const (
 )
 
 func (c *serveCmd) monitorMain() {
-	l.SetPrefix("[monitor] ")
-
 	var dst io.Writer = os.Stdout
 
 	logFile := locations.Get(locations.LogFile)
@@ -64,7 +65,7 @@ func (c *serveCmd) monitorMain() {
 			fileDst, err = open(logFile)
 		}
 		if err != nil {
-			l.Warnln("Failed to set up logging to file, proceeding with logging to stdout only:", err)
+			slog.Error("Failed to set up logging to file, proceeding with logging to stdout only", slogutil.Error(err))
 		} else {
 			if build.IsWindows {
 				// Translate line breaks to Windows standard
@@ -78,14 +79,14 @@ func (c *serveCmd) monitorMain() {
 			// Log to both stdout and file.
 			dst = io.MultiWriter(dst, fileDst)
 
-			l.Infof(`Log output saved to file "%s"`, logFile)
+			slog.Info("Saved log output", slogutil.FilePath(logFile))
 		}
 	}
 
 	args := os.Args
 	binary, err := getBinary(args[0])
 	if err != nil {
-		l.Warnln("Error starting the main Syncthing process:", err)
+		slog.Error("Failed to start the main Syncthing process", slogutil.Error(err))
 		panic("Error starting the main Syncthing process")
 	}
 	var restarts [restartCounts]time.Time
@@ -102,7 +103,7 @@ func (c *serveCmd) monitorMain() {
 		maybeReportPanics()
 
 		if t := time.Since(restarts[0]); t < restartLoopThreshold {
-			l.Warnf("%d restarts in %v; not retrying further", restartCounts, t)
+			slog.Error("Too many restarts; not retrying further", slog.Int("count", restartCounts), slog.Any("interval", t))
 			os.Exit(svcutil.ExitError.AsInt())
 		}
 
@@ -122,10 +123,10 @@ func (c *serveCmd) monitorMain() {
 			panic(err)
 		}
 
-		l.Debugln("Starting syncthing")
+		slog.Debug("Starting syncthing")
 		err = cmd.Start()
 		if err != nil {
-			l.Warnln("Error starting the main Syncthing process:", err)
+			slog.Error("Failed to start the main Syncthing process", slogutil.Error(err))
 			panic("Error starting the main Syncthing process")
 		}
 
@@ -134,19 +135,10 @@ func (c *serveCmd) monitorMain() {
 		stdoutLastLines = make([]string, 0, 50)
 		stdoutMut.Unlock()
 
-		wg := sync.NewWaitGroup()
+		var wg sync.WaitGroup
 
-		wg.Add(1)
-		go func() {
-			copyStderr(stderr, dst)
-			wg.Done()
-		}()
-
-		wg.Add(1)
-		go func() {
-			copyStdout(stdout, dst)
-			wg.Done()
-		}()
+		wg.Go(func() { copyStderr(stderr, dst) })
+		wg.Go(func() { copyStdout(stdout, dst) })
 
 		exit := make(chan error)
 
@@ -158,13 +150,13 @@ func (c *serveCmd) monitorMain() {
 		stopped := false
 		select {
 		case s := <-stopSign:
-			l.Infof("Signal %d received; exiting", s)
+			slog.Info("Received signal; exiting", "signal", s)
 			cmd.Process.Signal(sigTerm)
 			err = <-exit
 			stopped = true
 
 		case s := <-restartSign:
-			l.Infof("Signal %d received; restarting", s)
+			slog.Info("Received signal; restarting", "signal", s)
 			cmd.Process.Signal(sigHup)
 			err = <-exit
 
@@ -176,7 +168,8 @@ func (c *serveCmd) monitorMain() {
 			os.Exit(svcutil.ExitSuccess.AsInt())
 		}
 
-		if exiterr, ok := err.(*exec.ExitError); ok {
+		exiterr := &exec.ExitError{}
+		if errors.As(err, &exiterr) {
 			exitCode := exiterr.ExitCode()
 			if stopped || c.NoRestart {
 				os.Exit(exitCode)
@@ -184,9 +177,9 @@ func (c *serveCmd) monitorMain() {
 			if exitCode == svcutil.ExitUpgrade.AsInt() {
 				// Restart the monitor process to release the .old
 				// binary as part of the upgrade process.
-				l.Infoln("Restarting monitor...")
+				slog.Info("Restarting monitor...")
 				if err = restartMonitor(binary, args); err != nil {
-					l.Warnln("Restart:", err)
+					slog.Error("Failed to restart monitor", slogutil.Error(err))
 				}
 				os.Exit(exitCode)
 			}
@@ -196,7 +189,7 @@ func (c *serveCmd) monitorMain() {
 			os.Exit(svcutil.ExitError.AsInt())
 		}
 
-		l.Infoln("Syncthing exited:", err)
+		slog.Info("Syncthing exited", slogutil.Error(err))
 		time.Sleep(restartPause)
 
 		if first {
@@ -238,47 +231,29 @@ func copyStderr(stderr io.Reader, dst io.Writer) {
 			return
 		}
 
-		if panicFd == nil {
-			dst.Write([]byte(line))
+		dst.Write([]byte(line))
 
-			if strings.HasPrefix(line, "panic:") || strings.HasPrefix(line, "fatal error:") {
-				panicFd, err = os.Create(locations.GetTimestamped(locations.PanicLog))
-				if err != nil {
-					l.Warnln("Create panic log:", err)
-					continue
-				}
-
-				l.Warnf("Panic detected, writing to \"%s\"", panicFd.Name())
-				if strings.Contains(line, "leveldb") && strings.Contains(line, "corrupt") {
-					l.Warnln(`
-*********************************************************************************
-* Crash due to corrupt database.                                                *
-*                                                                               *
-* This crash usually occurs due to one of the following reasons:                *
-*  - Syncthing being stopped abruptly (killed/loss of power)                    *
-*  - Bad hardware (memory/disk issues)                                          *
-*  - Software that affects disk writes (SSD caching software and similar)       *
-*                                                                               *
-* Please see the following URL for instructions on how to recover:              *
-*   https://docs.syncthing.net/users/faq.html#my-syncthing-database-is-corrupt  *
-*********************************************************************************
-`)
-				} else {
-					l.Warnln("Please check for existing issues with similar panic message at https://github.com/syncthing/syncthing/issues/")
-					l.Warnln("If no issue with similar panic message exists, please create a new issue with the panic log attached")
-				}
-
-				stdoutMut.Lock()
-				for _, line := range stdoutFirstLines {
-					panicFd.WriteString(line)
-				}
-				panicFd.WriteString("...\n")
-				for _, line := range stdoutLastLines {
-					panicFd.WriteString(line)
-				}
-				stdoutMut.Unlock()
+		if panicFd == nil && (strings.HasPrefix(line, "panic:") || strings.HasPrefix(line, "fatal error:") || strings.HasPrefix(line, "runtime:")) {
+			panicFd, err = os.Create(locations.GetTimestamped(locations.PanicLog))
+			if err != nil {
+				slog.Error("Failed to create panic log", slogutil.Error(err))
+				continue
 			}
 
+			slog.Error("Panic detected, writing to file", slogutil.FilePath(panicFd.Name()))
+			slog.Info("Please check for existing issues with similar panic message at https://github.com/syncthing/syncthing/issues/")
+			slog.Info("If no issue with similar panic message exists, please create a new issue with the panic log attached")
+
+			stdoutMut.Lock()
+			for _, line := range stdoutFirstLines {
+				panicFd.WriteString(line)
+			}
+			panicFd.WriteString("...\n")
+			for _, line := range stdoutLastLines {
+				panicFd.WriteString(line)
+			}
+			stdoutMut.Unlock()
+
 			panicFd.WriteString("Panic at " + time.Now().Format(time.RFC3339) + "\n")
 		}
 
@@ -448,7 +423,6 @@ func newAutoclosedFile(name string, closeDelay, maxOpenTime time.Duration) (*aut
 		name:        name,
 		closeDelay:  closeDelay,
 		maxOpenTime: maxOpenTime,
-		mut:         sync.NewMutex(),
 		closed:      make(chan struct{}),
 		closeTimer:  time.NewTimer(time.Minute),
 	}
@@ -556,7 +530,7 @@ func maybeReportPanics() {
 	// Try to get a config to see if/where panics should be reported.
 	cfg, err := loadOrDefaultConfig()
 	if err != nil {
-		l.Warnln("Couldn't load config; not reporting crash")
+		slog.Error("Couldn't load config; not reporting crash")
 		return
 	}
 
@@ -576,7 +550,7 @@ func maybeReportPanics() {
 		case <-ctx.Done():
 			return
 		case <-time.After(panicUploadNoticeWait):
-			l.Warnln("Uploading crash reports is taking a while, please wait...")
+			slog.Warn("Uploading crash reports is taking a while, please wait")
 		}
 	}()
 

cmd/syncthing/perfstats_unix.go

@@ -16,7 +16,9 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/syncthing/syncthing/lib/build"
 	"github.com/syncthing/syncthing/lib/locations"
+	"github.com/syncthing/syncthing/lib/osutil"
 	"github.com/syncthing/syncthing/lib/protocol"
 	"golang.org/x/exp/constraints"
 )
@@ -48,14 +50,19 @@ func savePerfStats(file string) {
 		in, out := protocol.TotalInOut()
 		timeDiff := t.Sub(prevTime)
 
+		rss := curRus.Maxrss
+		if build.IsDarwin {
+			rss /= 1024
+		}
+
 		fmt.Fprintf(fd, "%.03f\t%f\t%d\t%d\t%.0f\t%.0f\t%d\n",
 			t.Sub(t0).Seconds(),
 			rate(cpusec(&prevRus), cpusec(&curRus), timeDiff, 1),
 			(curMem.Sys-curMem.HeapReleased)/1024,
-			curRus.Maxrss/1024,
+			rss,
 			rate(prevIn, in, timeDiff, 1e3),
 			rate(prevOut, out, timeDiff, 1e3),
-			dirsize(locations.Get(locations.Database))/1024,
+			osutil.DirSize(locations.Get(locations.Database))/1024,
 		)
 
 		prevTime = t
@@ -78,21 +85,3 @@ func rate[T number](prev, cur T, d time.Duration, div float64) float64 {
 	rate := float64(diff) / d.Seconds() / div
 	return rate
 }
-
-func dirsize(location string) int64 {
-	entries, err := os.ReadDir(location)
-	if err != nil {
-		return 0
-	}
-
-	var size int64
-	for _, entry := range entries {
-		fi, err := entry.Info()
-		if err != nil {
-			continue
-		}
-		size += fi.Size()
-	}
-
-	return size
-}

compat.yaml

@@ -32,3 +32,17 @@
     darwin: "20"
     linux: "3.2"
     windows: "10.0"
+
+- runtime: go1.25
+  requirements:
+    # macOS 12 (Monterey) per https://tip.golang.org/doc/go1.25#darwin
+    darwin: "21"
+    linux: "3.2"
+    windows: "10.0"
+
+- runtime: go1.26 # no changes from 1.25
+  requirements:
+    darwin: "21"
+    linux: "3.2"
+    windows: "10.0"
+

etc/linux-desktop/syncthing-ui.desktop

@@ -2,7 +2,7 @@
 Name=Syncthing Web UI
 GenericName=File synchronization UI
 Comment=Opens Syncthing's Web UI in the default browser (Syncthing must already be started).
-Exec=syncthing --browser-only
+Exec=syncthing browser
 Icon=syncthing
 Terminal=false
 Type=Application

etc/linux-systemd/system/syncthing@.service

@@ -7,22 +7,215 @@ StartLimitBurst=4
 
 [Service]
 User=%i
-ExecStart=/usr/bin/syncthing serve --no-browser --no-restart --logflags=0
+Environment="STLOGFORMATTIMESTAMP="
+Environment="STLOGFORMATLEVELSTRING=false"
+Environment="STLOGFORMATLEVELSYSLOG=true"
+ExecStart=/usr/bin/syncthing serve --no-browser --no-restart
 Restart=on-failure
 RestartSec=1
 SuccessExitStatus=3 4
 RestartForceExitStatus=3 4
 
-# Hardening
-ProtectSystem=full
-PrivateTmp=true
-SystemCallArchitectures=native
-MemoryDenyWriteExecute=true
-NoNewPrivileges=true
+#############
+# SANDBOXING
+#############
+#
+# This section contains best-effort sandboxing of syncthing. Such sandboxing is
+# useful to reduce the blast damage of a syncthing exploit.
+#
+# The sandboxing is "best-effort" only because some of these options are ignored
+# if your systemd or kernel are too old or configured in unusual ways. Systemd
+# should (but may not) tell you in the journal logs if that's the case. See the
+# logs (after starting the service) with:
+#
+#    journalctl --boot --pager-end --unit syncthing@<user-you-used>.service
+#
+# See systemd's analysis of syncthing's sandbox with:
+#
+#    systemd-analyze security syncthing@<user-you-used>.service
+#
+# Most of these sandboxing options are documented in `man systemd.exec`.
+#
+# NOTE: Some of these options _appear_ redundant with each other... but
+# depending on the version and configs of systemd and the kernel, some of the
+# "redundant" options may be non-functional while others still work.
+# We recommend leaving the "redundant" options in place.
 
-# Elevated permissions to sync ownership (disabled by default),
-# see https://docs.syncthing.net/advanced/folder-sync-ownership
+# Makes /usr, /boot, /efi and /etc read-only.
+ProtectSystem=full
+# Protect several system areas syncthing should not be touching.
+ProtectKernelTunables=true
+ProtectKernelModules=true
+ProtectKernelLogs=true
+ProtectControlGroups=true
+ProtectHostname=true
+ProtectClock=true
+# No new privileges through SUID/SGID binaries
+NoNewPrivileges=true
+# Prevents *setting* SUID/SGID bits on files/dirs
+RestrictSUIDSGID=true
+# Prevent memory pages that are both writable and executable. This kills JIT
+# compilers, but syncthing is precompiled.
+MemoryDenyWriteExecute=true
+# Prevents creation of unprivileged user namespaces which are a significant
+# source of privilege escalation exploits.
+#
+# (In 2023, Google saw 44% of kernel exploits using unpriv. user namespaces.
+# Source: https://ubuntu.com/blog/ubuntu-23-10-restricted-unprivileged-user-namespaces)
+#
+# The service can still be placed *inside* such user namespaces (and is, through
+# other sandboxing options), it just can't create any itself.
+RestrictNamespaces=true
+# RT task scheduling can be abused for denial-of-service
+RestrictRealtime=true
+# NOTE: This option is poorly named. It doesn't _restrict_ the listed families,
+# it _allows_ the listed families. Unlisted ones are restricted.
+#
+# Specifically, notice the absence of AF_PACKET (raw packets).
+# AF_UNIX is needed to support binding to UNIX sockets.
+# AF_NETLINK is needed to support hotplugging of network devices and because
+# otherwise we see the following (non-fatal) error on startup:
+#
+#  Failed to list network interfaces (error="route ip+net: netlinkrib:
+#  address family not supported by protocol" log.pkg=upnp)
+#
+# This option does NOT affect systemd socket passing using .socket units.
+RestrictAddressFamilies=AF_INET AF_INET6 AF_NETLINK AF_UNIX
+# The lifetime limit of (superuser) capabilities that syncthing can acquire.
+# This option _restricts_ capabilities.
+#
+# NOTE: This is set to `CAP_CHOWN CAP_FOWNER` to avoid breaking users that have
+# set `AmbientCapabilities=CAP_CHOWN CAP_FOWNER` to enable the `syncOwnership`
+# option as described in:
+#   https://docs.syncthing.net/users/autostart.html#permissions
+#
+# If you do not use the `syncOwnership` option, you can set this to:
+#   CapabilityBoundingSet=
+CapabilityBoundingSet=CAP_CHOWN CAP_FOWNER
+# Start with empty (superuser) capabilities.
+# This option _expands_ capabilities.
+# AmbientCapabilities should equal CapabilityBoundingSet.
+#
+# NOTE: IFF you wish to use the `syncOwnership` option, you must set this to:
+#   AmbientCapabilities=CAP_CHOWN CAP_FOWNER
+# in a systemd drop-in file. Be aware that this gives syncthing the ability to
+# change or ignore file ownership across the entire operating system.
+AmbientCapabilities=
+# Disables `personality` system call; it can be used for privilege escalation.
+LockPersonality=true
+# Prevents circumvention of restrictions through the use of x86 syscalls on
+# x86-64 systems.
+SystemCallArchitectures=native
+# Clean up IPC objects after service stops.
+RemoveIPC=true
+# Create private namespace for System V IPC.
+# NOTE: This does not apply to AF_UNIX sockets which are more commonly used.
+PrivateIPC=true
+# Completely isolated /tmp and /var/tmp
+PrivateTmp=disconnected
+# New /dev with safe virtual devices like /dev/null
+PrivateDevices=true
+# Allow access to devices explicitly listed with DeviceAllow and pseudo devices
+# like /dev/null.
+DevicePolicy=closed
+# Creates a new PID namespace. /proc now contains only entries for processes
+# in this PID namespace.
+PrivatePIDs=true
+# Make processes owned by other users hidden in /proc/
+ProtectProc=invisible
+# Prevent access to non-pid interfaces in /proc.
+ProcSubset=pid
+# System call allow-list. `@system-service` is a systemd-provided category that
+# allows common syscalls needed for system services.
+SystemCallFilter=@system-service
+# Return EPERM when a disallowed syscall is made instead of killing the process.
+SystemCallErrorNumber=EPERM
+# Digits from left to right; disallow creation of files with:
+# - special security-related bits like setuid/setgid
+# - (no restrictions on file owner permissions)
+# - group-writable access
+# - world-readable access
+# NOTE: The default value is 0022. We are only restricting special security bits
+# and world-readable access.
+# NOTE: Syncthing can still _explicitly_ change file permissions using `chmod`.
+UMask=7027
+# The default HOME folder for system users on Debian-like systems is
+# /nonexistent, which should never exist.
+# We prevent syncthing from accessing that folder it if was previously created
+# through misconfiguration, or from creating it if it's (correctly) missing.
+InaccessiblePaths=-/nonexistent
+
+##################
+# OPTIONAL CONFIG
+##################
+#
+# Users that want to tweak this service file should add a systemd drop-in
+# file to avoid changing the original file.
+#
+# Documentation describing drop-in files:
+#   https://www.freedesktop.org/software/systemd/man/latest/systemd.unit.html
+#
+# Example drop-in file location (assuming user "syncthing"):
+#   /etc/systemd/system/syncthing@syncthing.service.d/override.conf
+#
+## Elevated permissions to sync ownership (disabled by default),
+## see https://docs.syncthing.net/advanced/folder-sync-ownership
+##
+## NOTE:
+##  - Use the same value for *both* of these options.
+##  - PrivateUsers=false must be set (false is the default, but you might have
+##    changed it to true in the "extra credit" section below).
 #AmbientCapabilities=CAP_CHOWN CAP_FOWNER
+#CapabilityBoundingSet=CAP_CHOWN CAP_FOWNER
+
+#########################
+# EXTRA CREDIT FOR USERS
+#########################
+#
+# Users that want to harden their systems further should set the following
+# properties. (Also through a systemd drop-in file; see comments above.)
+#
+## Makes all of / read-only *except*:
+## - /dev/, /proc/ and /sys/ (see other Protect* options)
+## - ReadWritePaths=
+## - StateDirectory=, LogsDirectory= and similar
+##
+## This cannot be enabled by default because we don't know which folders you wish to
+## share. If enabling this option, enable it along with ReadWritePaths=, e.g.:
+## ReadWritePaths=/my/shared/dir1 /my/shared/dir2
+#ProtectSystem=strict
+#
+## When enabled, sets up a new user namespace. Maps the "root" user and group as
+## well as the unit's own user and group to themselves and everything else to
+## the  "nobody" user and group.
+## This is useful to securely detach the user and group databases used by the
+## unit from the rest of the system, and thus to create an effective sandbox
+## environment.
+#PrivateUsers=true
+#
+## Makes /home, /root and /run/user *invisible* while allowing BindPaths= and
+## BindReadOnlyPaths= to "carve out" access to parts of those dirs.
+## (Use 'true' instead of 'tmpfs' if you don't need to carve out anything.)
+##
+## "Invisible" is superior to read-only provided by ProtectSystem=strict because
+## it prevents information disclosure of private user data in case of service
+## compromise.
+#ProtectHome=tmpfs
+#
+## Disallow execution of all binaries. ExecPaths= below carves out exceptions.
+## Can't be enabled by default due to the External File Versioning feature:
+##   https://docs.syncthing.net/users/versioning.html#external-file-versioning
+##
+## If you do not use that feature, you can enable both NoExecPaths and
+## ExecPaths.
+## If you do use that featuer, you can still use these options; just add
+## the paths to the binaries you invoke to ExecPaths so they can be executed.
+#NoExecPaths=/
+## Allow execution of syncthing and system shared libraries.
+## NOTE: If you are seeing an error like
+## "Failed to execute /some/path/to/syncthing: Permission denied", this is the
+## option you need to update to use your non-standard install location.
+#ExecPaths=/usr/bin/syncthing /usr/lib
 
 [Install]
 WantedBy=multi-user.target

etc/linux-systemd/user/syncthing.service

@@ -5,7 +5,10 @@ StartLimitIntervalSec=60
 StartLimitBurst=4
 
 [Service]
-ExecStart=/usr/bin/syncthing serve --no-browser --no-restart --logflags=0
+Environment="STLOGFORMATTIMESTAMP="
+Environment="STLOGFORMATLEVELSTRING=false"
+Environment="STLOGFORMATLEVELSYSLOG=true"
+ExecStart=/usr/bin/syncthing serve --no-browser --no-restart
 Restart=on-failure
 RestartSec=1
 SuccessExitStatus=3 4

etc/linux-upstart/user/syncthing.conf

@@ -18,4 +18,4 @@ env STNORESTART=yes
 respawn
 
 # the syncthing command Upstart is to execute when it is started up
-exec $SYNCTHING_EXE -no-browser
+exec $SYNCTHING_EXE --no-browser

go.mod

@@ -1,108 +1,120 @@
 module github.com/syncthing/syncthing
 
-go 1.23.0
+go 1.25.0
 
 require (
-	github.com/AudriusButkevicius/recli v0.0.7-0.20220911121932-d000ce8fbf0f
-	github.com/alecthomas/kong v1.10.0
-	github.com/aws/aws-sdk-go v1.55.6
+	github.com/AudriusButkevicius/recli v0.0.7
+	github.com/alecthomas/kong v1.15.0
+	github.com/aws/aws-sdk-go v1.55.8
 	github.com/calmh/incontainer v1.0.0
 	github.com/calmh/xdr v1.2.0
 	github.com/ccding/go-stun v0.1.5
+	github.com/coreos/go-semver v0.3.1
 	github.com/d4l3k/messagediff v1.2.1
 	github.com/getsentry/raven-go v0.2.0
-	github.com/go-ldap/ldap/v3 v3.4.10
+	github.com/go-ldap/ldap/v3 v3.4.13
 	github.com/gobwas/glob v0.2.3
-	github.com/gofrs/flock v0.12.1
+	github.com/gofrs/flock v0.13.0
 	github.com/hashicorp/golang-lru/v2 v2.0.7
-	github.com/jackpal/gateway v1.0.16
+	github.com/jackpal/gateway v1.1.1
 	github.com/jackpal/go-nat-pmp v1.0.2
 	github.com/jmoiron/sqlx v1.4.0
 	github.com/julienschmidt/httprouter v1.3.0
 	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
 	github.com/maruel/panicparse/v2 v2.5.0
-	github.com/mattn/go-sqlite3 v1.14.27
-	github.com/maxbrunsfeld/counterfeiter/v6 v6.11.2
+	github.com/mattn/go-sqlite3 v1.14.44
 	github.com/maxmind/geoipupdate/v6 v6.1.0
 	github.com/miscreant/miscreant.go v0.0.0-20200214223636-26d376326b75
-	github.com/oschwald/geoip2-golang v1.11.0
-	github.com/pierrec/lz4/v4 v4.1.22
-	github.com/prometheus/client_golang v1.21.1
+	github.com/oschwald/geoip2-golang v1.13.0
+	github.com/pierrec/lz4/v4 v4.1.26
+	github.com/prometheus/client_golang v1.23.2
 	github.com/puzpuzpuz/xsync/v3 v3.5.1
-	github.com/quic-go/quic-go v0.50.1
-	github.com/rabbitmq/amqp091-go v1.10.0
+	github.com/quic-go/quic-go v0.59.0
+	github.com/rabbitmq/amqp091-go v1.11.0
 	github.com/rcrowley/go-metrics v0.0.0-20250401214520-65e299d6c5c9
-	github.com/shirou/gopsutil/v4 v4.25.3
-	github.com/syncthing/notify v0.0.0-20250207082249-f0fa8f99c2bc
+	github.com/shirou/gopsutil/v4 v4.26.4
+	github.com/syncthing/notify v0.0.0-20250528144937-c7027d4f7465
 	github.com/syndtr/goleveldb v1.0.1-0.20220721030215-126854af5e6d
 	github.com/thejerf/suture/v4 v4.0.6
-	github.com/urfave/cli v1.22.16
+	github.com/urfave/cli v1.22.17
 	github.com/vitrun/qart v0.0.0-20160531060029-bf64b92db6b0
 	github.com/willabides/kongplete v0.4.0
-	go.uber.org/automaxprocs v1.6.0
-	golang.org/x/crypto v0.36.0
-	golang.org/x/net v0.38.0
-	golang.org/x/sys v0.31.0
-	golang.org/x/text v0.23.0
-	golang.org/x/time v0.11.0
-	golang.org/x/tools v0.31.0
-	google.golang.org/protobuf v1.36.6
-	modernc.org/sqlite v1.37.0
-	sigs.k8s.io/yaml v1.4.0
+	github.com/wlynxg/anet v0.0.5
+	golang.org/x/crypto v0.51.0
+	golang.org/x/exp v0.0.0-20260508232706-74f9aab9d74a
+	golang.org/x/net v0.55.0
+	golang.org/x/sys v0.45.0
+	golang.org/x/text v0.37.0
+	golang.org/x/time v0.15.0
+	google.golang.org/protobuf v1.36.11
+	modernc.org/sqlite v1.50.0
+	sigs.k8s.io/yaml v1.6.0
 )
 
 require (
-	github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 // indirect
+	github.com/Azure/go-ntlmssp v0.1.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
 	github.com/certifi/gocertifi v0.0.0-20210507211836-431795d63e8d // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
-	github.com/cpuguy83/go-md2man/v2 v2.0.5 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.7 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
-	github.com/ebitengine/purego v0.8.2 // indirect
+	github.com/ebitengine/purego v0.10.0 // indirect
 	github.com/fsnotify/fsnotify v1.7.0 // indirect
-	github.com/go-asn1-ber/asn1-ber v1.5.7 // indirect
+	github.com/go-asn1-ber/asn1-ber v1.5.8-0.20250403174932-29230038a667 // indirect
 	github.com/go-ole/go-ole v1.3.0 // indirect
-	github.com/go-task/slim-sprig/v3 v3.0.0 // indirect
 	github.com/golang/snappy v0.0.4 // indirect
-	github.com/google/pprof v0.0.0-20250317173921-a4b03ec1a45e // indirect
+	github.com/google/pprof v0.0.0-20250423184734-337e5dd93bb4 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/hashicorp/go-multierror v1.1.1 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
-	github.com/klauspost/compress v1.17.11 // indirect
 	github.com/lufia/plan9stats v0.0.0-20240909124753-873cd0166683 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/maxbrunsfeld/counterfeiter/v6 v6.12.0 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/ncruces/go-strftime v0.1.9 // indirect
+	github.com/ncruces/go-strftime v1.0.0 // indirect
 	github.com/nxadm/tail v1.4.11 // indirect
-	github.com/onsi/ginkgo/v2 v2.20.2 // indirect
 	github.com/oschwald/maxminddb-golang v1.13.1 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/posener/complete v1.2.3 // indirect
 	github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 // indirect
-	github.com/prometheus/client_model v0.6.1 // indirect
-	github.com/prometheus/common v0.62.0 // indirect
-	github.com/prometheus/procfs v0.15.1 // indirect
+	github.com/prometheus/client_model v0.6.2 // indirect
+	github.com/prometheus/common v0.66.1 // indirect
+	github.com/prometheus/procfs v0.16.1 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/riywo/loginshell v0.0.0-20200815045211-7d26008be1ab // indirect
+	github.com/rogpeppe/go-internal v1.12.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/stretchr/objx v0.5.2 // indirect
-	github.com/stretchr/testify v1.10.0 // indirect
-	github.com/tklauser/go-sysconf v0.3.14 // indirect
-	github.com/tklauser/numcpus v0.9.0 // indirect
+	github.com/stretchr/testify v1.11.1 // indirect
+	github.com/tklauser/go-sysconf v0.3.16 // indirect
+	github.com/tklauser/numcpus v0.11.0 // indirect
 	github.com/yusufpapurcu/wmi v1.2.4 // indirect
-	go.uber.org/mock v0.5.0 // indirect
-	golang.org/x/exp v0.0.0-20250305212735-054e65f0b394 // indirect
-	golang.org/x/mod v0.24.0 // indirect
-	golang.org/x/sync v0.12.0 // indirect
+	go.yaml.in/yaml/v2 v2.4.2 // indirect
+	golang.org/x/mod v0.36.0 // indirect
+	golang.org/x/sync v0.20.0 // indirect
+	golang.org/x/telemetry v0.0.0-20260508192327-42602be52be6 // indirect
+	golang.org/x/tools v0.45.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	modernc.org/libc v1.62.1 // indirect
+	modernc.org/libc v1.72.0 // indirect
 	modernc.org/mathutil v1.7.1 // indirect
-	modernc.org/memory v1.9.1 // indirect
+	modernc.org/memory v1.11.0 // indirect
 )
 
 // https://github.com/gobwas/glob/pull/55
 replace github.com/gobwas/glob v0.2.3 => github.com/calmh/glob v0.0.0-20220615080505-1d823af5017b
+
+// https://github.com/jackpal/gateway/pull/49
+replace github.com/jackpal/gateway v1.1.1 => github.com/marbens-arch/gateway v1.1.2-0.20260308173556-c567cc04e7d4
+
+// https://github.com/mattn/go-sqlite3/pull/1338
+replace github.com/mattn/go-sqlite3 v1.14.44 => github.com/calmh/go-sqlite3 v1.14.35-0.20260509063420-822b4765116d
+
+tool (
+	github.com/calmh/xdr/cmd/genxdr
+	github.com/maxbrunsfeld/counterfeiter/v6
+	golang.org/x/tools/cmd/goimports
+)

go.sum

@@ -1,24 +1,26 @@
 filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
 filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
-github.com/AudriusButkevicius/recli v0.0.7-0.20220911121932-d000ce8fbf0f h1:GmH5lT+moM7PbAJFBq57nH9WJ+wRnBXr/tyaYWbSAx8=
-github.com/AudriusButkevicius/recli v0.0.7-0.20220911121932-d000ce8fbf0f/go.mod h1:Nhfib1j/VFnLrXL9cHgA+/n2O6P5THuWelOnbfPNd78=
-github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 h1:mFRzDkZVAjdal+s7s0MwaRv9igoPqLRdzOLzw/8Xvq8=
-github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU=
-github.com/BurntSushi/toml v1.4.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+github.com/AudriusButkevicius/recli v0.0.7 h1:9zjbYlTupi+W5SJXm2cR2sV2mJAIg1sIfDcsW7hrkPM=
+github.com/AudriusButkevicius/recli v0.0.7/go.mod h1:Nhfib1j/VFnLrXL9cHgA+/n2O6P5THuWelOnbfPNd78=
+github.com/Azure/go-ntlmssp v0.1.0 h1:DjFo6YtWzNqNvQdrwEyr/e4nhU3vRiwenz5QX7sFz+A=
+github.com/Azure/go-ntlmssp v0.1.0/go.mod h1:NYqdhxd/8aAct/s4qSYZEerdPuH1liG2/X9DiVTbhpk=
+github.com/BurntSushi/toml v1.5.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
 github.com/alecthomas/assert/v2 v2.11.0 h1:2Q9r3ki8+JYXvGsDyBXwH3LcJ+WK5D0gc5E8vS6K3D0=
 github.com/alecthomas/assert/v2 v2.11.0/go.mod h1:Bze95FyfUr7x34QZrjL+XP+0qgp/zg8yS+TtBj1WA3k=
-github.com/alecthomas/kong v1.10.0 h1:8K4rGDpT7Iu+jEXCIJUeKqvpwZHbsFRoebLbnzlmrpw=
-github.com/alecthomas/kong v1.10.0/go.mod h1:p2vqieVMeTAnaC83txKtXe8FLke2X07aruPWXyMPQrU=
-github.com/alecthomas/repr v0.4.0 h1:GhI2A8MACjfegCPVq9f1FLvIBS+DrQ2KQBFZP1iFzXc=
-github.com/alecthomas/repr v0.4.0/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
-github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa h1:LHTHcTQiSGT7VVbI0o4wBRNQIgn917usHWOd6VAffYI=
-github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa/go.mod h1:cEWa1LVoE5KvSD9ONXsZrj0z6KqySlCCNKHlLzbqAt4=
-github.com/aws/aws-sdk-go v1.55.6 h1:cSg4pvZ3m8dgYcgqB97MrcdjUmZ1BeMYKUxMMB89IPk=
-github.com/aws/aws-sdk-go v1.55.6/go.mod h1:eRwEWoyTWFMVYVQzKMNHWP5/RV4xIUGMQfXQHfHkpNU=
+github.com/alecthomas/kong v1.15.0 h1:BVJstKbpO73zKpmIu+m/aLRrNmWwxXPIGTNin9VmLVI=
+github.com/alecthomas/kong v1.15.0/go.mod h1:wrlbXem1CWqUV5Vbmss5ISYhsVPkBb1Yo7YKJghju2I=
+github.com/alecthomas/repr v0.5.2 h1:SU73FTI9D1P5UNtvseffFSGmdNci/O6RsqzeXJtP0Qs=
+github.com/alecthomas/repr v0.5.2/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
+github.com/alexbrainman/sspi v0.0.0-20250919150558-7d374ff0d59e h1:4dAU9FXIyQktpoUAgOJK3OTFc/xug0PCXYCqU0FgDKI=
+github.com/alexbrainman/sspi v0.0.0-20250919150558-7d374ff0d59e/go.mod h1:cEWa1LVoE5KvSD9ONXsZrj0z6KqySlCCNKHlLzbqAt4=
+github.com/aws/aws-sdk-go v1.55.8 h1:JRmEUbU52aJQZ2AjX4q4Wu7t4uZjOu71uyNmaWlUkJQ=
+github.com/aws/aws-sdk-go v1.55.8/go.mod h1:ZkViS9AqA6otK+JBBNH2++sx1sgxrPKcSzPPvQkUtXk=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/calmh/glob v0.0.0-20220615080505-1d823af5017b h1:Fjm4GuJ+TGMgqfGHN42IQArJb77CfD/mAwLbDUoJe6g=
 github.com/calmh/glob v0.0.0-20220615080505-1d823af5017b/go.mod h1:91K7jfEsgJSyfSrX+gmrRfZMtntx6JsHolWubGXDopg=
+github.com/calmh/go-sqlite3 v1.14.35-0.20260509063420-822b4765116d h1:liVtRMlDBqDyR4qKkMRIFTdUK6+aoG6Oh97DKnhrCHc=
+github.com/calmh/go-sqlite3 v1.14.35-0.20260509063420-822b4765116d/go.mod h1:pjEuOr8IwzLJP2MfGeTb0A35jauH+C2kbHKBr7yXKVQ=
 github.com/calmh/incontainer v1.0.0 h1:g2cTUtZuFGmMGX8GoykPkN1Judj2uw8/3/aEtq4Z/rg=
 github.com/calmh/incontainer v1.0.0/go.mod h1:eOhqnw15c9X+4RNBe0W3HlUZFfX16O0EDsCOInTndHY=
 github.com/calmh/xdr v1.2.0 h1:GaGSNH4ZDw9kNdYqle6+RcAENiaQ8/611Ok+jQbBEeU=
@@ -34,8 +36,10 @@ github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XL
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
-github.com/cpuguy83/go-md2man/v2 v2.0.5 h1:ZtcqGrnekaHpVLArFSe4HK5DoKx1T0rq2DwVB0alcyc=
-github.com/cpuguy83/go-md2man/v2 v2.0.5/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/coreos/go-semver v0.3.1 h1:yi21YpKnrx1gt5R+la8n5WgS0kCrsPp33dmEyHReZr4=
+github.com/coreos/go-semver v0.3.1/go.mod h1:irMmmIw/7yzSRPWryHsK7EYSg09caPQL03VsM8rvUec=
+github.com/cpuguy83/go-md2man/v2 v2.0.7 h1:zbFlGlXEAKlwXpmvle3d8Oe3YnkKIK4xSRTd3sHPnBo=
+github.com/cpuguy83/go-md2man/v2 v2.0.7/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
 github.com/d4l3k/messagediff v1.2.1 h1:ZcAIMYsUg0EAp9X+tt8/enBE/Q8Yd5kzPynLyKptt9U=
 github.com/d4l3k/messagediff v1.2.1/go.mod h1:Oozbb1TVXFac9FtSIxHBMnBCq2qeH/2KkEQxENCrlLo=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -43,8 +47,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
-github.com/ebitengine/purego v0.8.2 h1:jPPGWs2sZ1UgOSgD2bClL0MJIqu58nOmIcBuXr62z1I=
-github.com/ebitengine/purego v0.8.2/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
+github.com/ebitengine/purego v0.10.0 h1:QIw4xfpWT6GWTzaW5XEKy3HXoqrJGx1ijYHzTF0/ISU=
+github.com/ebitengine/purego v0.10.0/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/fsnotify/fsnotify v1.5.4/go.mod h1:OVB6XrOHzAwXMpEM7uPOzcehqUV2UqJxmVXmkdnm1bU=
@@ -53,22 +57,18 @@ github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nos
 github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
 github.com/getsentry/raven-go v0.2.0 h1:no+xWJRb5ZI7eE8TWgIq1jLulQiIoLG0IfYxv5JYMGs=
 github.com/getsentry/raven-go v0.2.0/go.mod h1:KungGk8q33+aIAZUIVWZDr2OfAEBsO49PX4NzFV5kcQ=
-github.com/go-asn1-ber/asn1-ber v1.5.7 h1:DTX+lbVTWaTw1hQ+PbZPlnDZPEIs0SS/GCZAl535dDk=
-github.com/go-asn1-ber/asn1-ber v1.5.7/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
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@@ -136,8 +130,8 @@ github.com/julienschmidt/httprouter v1.3.0 h1:U0609e9tgbseu3rBINet9P48AI/D3oJs4d
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@@ -148,23 +142,23 @@ github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
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@@ -198,36 +190,34 @@ github.com/posener/complete v1.2.3 h1:NP0eAhjcjImqslEwo/1hq7gpajME0fTLTezBKDqfXq
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@@ -341,50 +306,28 @@ golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBc
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@@ -398,8 +341,8 @@ google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzi
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
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-google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
-google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
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@@ -415,29 +358,33 @@ gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
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-modernc.org/memory v1.9.1/go.mod h1:/JP4VbVC+K5sU2wZi9bHoq2MAkCnrt2r98UGeSK7Mjw=
+modernc.org/memory v1.11.0 h1:o4QC8aMQzmcwCK3t3Ux/ZHmwFPzE6hf2Y5LbkRs+hbI=
+modernc.org/memory v1.11.0/go.mod h1:/JP4VbVC+K5sU2wZi9bHoq2MAkCnrt2r98UGeSK7Mjw=
 modernc.org/opt v0.1.4 h1:2kNGMRiUjrp4LcaPuLY2PzUfqM/w9N23quVwhKt5Qm8=
 modernc.org/opt v0.1.4/go.mod h1:03fq9lsNfvkYSfxrfUhZCWPk1lm4cq4N+Bh//bEtgns=
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-modernc.org/sqlite v1.37.0/go.mod h1:5YiWv+YviqGMuGw4V+PNplcyaJ5v+vQd7TQOgkACoJM=
+modernc.org/sqlite v1.50.0 h1:eMowQSWLK0MeiQTdmz3lqoF5dqclujdlIKeJA11+7oM=
+modernc.org/sqlite v1.50.0/go.mod h1:m0w8xhwYUVY3H6pSDwc3gkJ/irZT/0YEXwBlhaxQEew=
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-sigs.k8s.io/yaml v1.4.0 h1:Mk1wCc2gy/F0THH0TAp1QYyJNzRm2KCLy3o5ASXVI5E=
-sigs.k8s.io/yaml v1.4.0/go.mod h1:Ejl7/uTz7PSA4eKMyQCUTnhZYNmLIl+5c2lQPGR2BPY=
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gui/default/assets/css/overrides.css

@@ -221,8 +221,8 @@ li[language-select] > .dropdown-menu {
 }
 
 li[language-select] > .dropdown-menu > li > a {
-    overflow: hidden;
-    text-overflow: ellipsis;
+    white-space: normal;
+    overflow-wrap: break-word;
 }
 
 .nav>li{

gui/default/assets/lang/lang-ar.json

@@ -1,21 +1,21 @@
 {
-    "A device with that ID is already added.": "أضيف هذا الجهاز بالفعل.",
+    "A device with that ID is already added.": "أُضيف هذا الجهاز بالفعل.",
     "A negative number of days doesn't make sense.": "لا يمكن استخدام قيمة سالبة لعدد الأيام.",
     "A new major version may not be compatible with previous versions.": "الإصدار الجديد قد لا يتوافق مع الإصدارات السابقة.",
-    "API Key": "مفتاح API",
+    "API Key": "مفتاح واجهة برمجة التطبيقات \"API\"",
     "About": "حول",
     "Action": "إجراء",
     "Actions": "الإجراءات",
     "Active filter rules": "قواعد التصفية النشطة",
-    "Add": "إضافة",
-    "Add Device": "إضافة جهاز",
-    "Add Folder": "إضافة مجلد",
-    "Add Remote Device": "إضافة جهاز بعيد",
+    "Add": "أضف",
+    "Add Device": "أضف جهاز",
+    "Add Folder": "أضف مجلد",
+    "Add Remote Device": "أضف جهاز بعيد",
     "Add devices from the introducer to our device list, for mutually shared folders.": "أضف أجهزة من الوسيط إلى قائمة الأجهزة الخاصة بنا، للمجلدات المشتركة بشكل متبادل.",
-    "Add filter entry": "إضافة عامل التصفية",
+    "Add filter entry": "أضف عامل التصفية",
     "Add ignore patterns": "أضف أنماط التجاهل",
     "Add new folder?": "إضافة مجلد جديد؟",
-    "Additionally the full rescan interval will be increased (times 60, i.e. new default of 1h). You can also configure it manually for every folder later after choosing No.": "بالإضافة إلى ذلك ، سيُزاد الفاصل الزمني لإعادة الفحص الكامل (60 مرة، وهو الافتراضي الجديد من 1H). يمكنك أيضًا التحكم بالإعدادات وتعديلها يدويًا لكل مجلد لاحقًا بعد اختيار \"لا\".",
+    "Additionally the full rescan interval will be increased (times 60, i.e. new default of 1h). You can also configure it manually for every folder later after choosing No.": "بالإضافة إلى ذلك، سيُزاد الفاصل الزمني لإعادة الفحص الكامل (60 مرة، وهو الافتراضي الجديد من 1H). يمكنك أيضًا التحكم بالإعدادات وتعديلها يدويًا لكل مجلد لاحقًا بعد اختيار \"لا\".",
     "Address": "العنوان",
     "Addresses": "العناوين",
     "Advanced": "متقدم",
@@ -27,6 +27,7 @@
     "Allowed Networks": "الشبكات المسموح بها",
     "Alphabetic": "أبجدية",
     "Altered by ignoring deletes.": "تغير بتجاهل عمليات الحذف.",
+    "Always turned on when the folder type is \"{%foldertype%}\".": "مفعل دائمًا عندما يكون نوع المجلد هو \"{{foldertype}}\".",
     "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "الإصدار يعالج بواسطة أمر خارجي. يجب إزالة الملف من المجلدات المشتركة. إذا كان المسار للتطبيق يحتوي على مسافات، يجب وضعها بين علامتي تنصيص دلالة على الاقتباس.",
     "Anonymous Usage Reporting": "تقارير الإستخدام المجهولة",
     "Anonymous usage report format has changed. Would you like to move to the new format?": "هل تريد الانتقال الى التصميم الجديد لتقرير الاستخدام المجهول ؟",
@@ -35,7 +36,7 @@
     "Are you sure you want to override all remote changes?": "هل أنت متأكد أنك تريد تجاوز كافة التغييرات عن بُعد؟",
     "Are you sure you want to permanently delete all these files?": "هل أنت متأكد أنك تريد حذف كل هذه الملفات بشكل دائم؟",
     "Are you sure you want to remove device {%name%}?": "هل أنت متيقِّن من حذف هذا الجهاز {{name}}؟",
-    "Are you sure you want to remove folder {%label%}?": "هل انت متاكد من حذف المجلد {{label}}؟",
+    "Are you sure you want to remove folder {%label%}?": "أمتاكد من حذف المجلد {{label}}؟",
     "Are you sure you want to restore {%count%} files?": "هل انت متاكد من استعادة {{count}} ملف؟",
     "Are you sure you want to revert all local changes?": "هل أنت متأكد أنك تريد التراجع عن كافة التغييرات المحلية؟",
     "Are you sure you want to upgrade?": "هل أنت متأكد أنك تريد الترقية؟",
@@ -49,10 +50,12 @@
     "Automatically create or share folders that this device advertises at the default path.": "أنشئ وشارك المجلدات الموجودة في المسار الافتراضي تلقائيا.",
     "Available debug logging facilities:": "خدمات سجلات تدقيق البرمجيات المتوفرة:",
     "Be careful!": "احذر!",
+    "Block Indexing": "فهرسة الكُتل",
     "Body:": "جسم:",
     "Bugs": "أخطاء برمجية",
     "Cancel": "إلغاء",
-    "Changelog": "سجل التغيير",
+    "Cannot be enabled when the folder type is \"{%foldertype%}\".": "لا يمكن تفعيله عندما يكون نوع المجلد هو \"{{foldertype}}\".",
+    "Changelog": "سجل التغييرات",
     "Clean out after": "نظف بعد",
     "Cleaning Versions": "إصدارات نظيفة",
     "Cleanup Interval": "الفاصل الزمني للتنظيف",
@@ -74,12 +77,13 @@
     "Copied from elsewhere": "منسوخ من مكان أخر",
     "Copied from original": "منسوخ من الأصل",
     "Copied!": "نُسِخَ!",
-    "Copy": "نسخ",
+    "Copy": "انسخ",
     "Copy failed! Try to select and copy manually.": "فشل النسخ! حاول التحديد والنسخ يدويًا.",
     "Currently Shared With Devices": "مُشارَك مع الأجهزة حاليا",
     "Custom Range": "نطاق مخصص",
     "Danger!": "خطر!",
     "Database Location": "موقع قاعدة البيانات",
+    "Debug": "تصحيح العلل",
     "Debugging Facilities": "خدمات تدقيق البرمجيات",
     "Default": "أفتراضي",
     "Default Configuration": "اعدادات افتراضية",
@@ -87,15 +91,16 @@
     "Default Folder": "المجلد الافتراضي",
     "Default Ignore Patterns": "أنماط التجاهل الافتراضية",
     "Defaults": "الافتراضات",
-    "Delete": "حذف",
-    "Delete Unexpected Items": "حذف العناصر غير المتوقعة",
-    "Deleted {%file%}": "حُذِفت {{file}}",
+    "Delete": "احذف",
+    "Delete Unexpected Items": "احذف العناصر غير المتوقعة",
+    "Deleted {%file%}": "حُذِف {{file}}",
     "Deselect All": "الغاء تحديد الكل",
     "Deselect devices to stop sharing this folder with.": "قم بإلغاء تحديد الأجهزة لإيقاف مشاركة هذا المجلد معها.",
     "Deselect folders to stop sharing with this device.": "قم بإلغاء تحديد المجلدات لإيقاف المشاركة مع هذا الجهاز.",
     "Device": "جهاز",
     "Device \"{%name%}\" ({%device%} at {%address%}) wants to connect. Add new device?": "الجهاز \"{{name}}\" ({{device}} في {{address}}) يرغب في الاتصال، إضافة جهاز جديد؟",
     "Device Certificate": "شهادة الجهاز",
+    "Device Group": "مجموعة الجهاز",
     "Device ID": "معرف الجهاز",
     "Device Identification": "معرف الجهاز",
     "Device Name": "اسم الجهاز",
@@ -110,7 +115,7 @@
     "Disabled periodic scanning and enabled watching for changes": "تعطيل المسح الدوري وتفعيل مشاهدة التغييرات",
     "Disabled periodic scanning and failed setting up watching for changes, retrying every 1m:": "تعطيل المسح الدوري وفشل إعداد مشاهدة التغييرات، إعادة المحاولة كل 1 دقيقة:",
     "Disables comparing and syncing file permissions. Useful on systems with nonexistent or custom permissions (e.g. FAT, exFAT, Synology, Android).": "تعطيل مقارنة أذونات الملفات ومزامنتها. مفيد على الأنظمة ذات الأذونات غير الموجودة أو المخصصة (مثل FAT و exFAT و Synology و Android).",
-    "Discard": "تجاهل",
+    "Discard": "أهمِل",
     "Disconnected": "غير متصل",
     "Disconnected (Inactive)": "غير متصل (غير نشط)",
     "Disconnected (Unused)": "غير متصل (غير مستخدم)",
@@ -133,10 +138,10 @@
     "Edit Folder": "تعديل المجلد",
     "Edit Folder Defaults": "تعديل الإعدادت الافتراضية للمجلد",
     "Editing {%path%}.": "تعديل {{path}}.",
-    "Enable Crash Reporting": "تفعيل التبليغ عن الاخطاء",
-    "Enable NAT traversal": "تفعيل اجتياز النات",
-    "Enable Relaying": "تفعيل الترحيل",
-    "Enabled": "مفعل",
+    "Enable Crash Reporting": "فعِّل التبليغ عن الإنهيار",
+    "Enable NAT traversal": "فعِّل اجتياز NAT",
+    "Enable Relaying": "فعِّل الترحيل",
+    "Enabled": "مُفعّل",
     "Enables sending extended attributes to other devices, and applying incoming extended attributes. May require running with elevated privileges.": "يفعل إرسال البيانات الثانوية، وتطبيق البيانات الثانوية المستوردة. قد يطلب صلاحيات أكثر.",
     "Enables sending extended attributes to other devices, but not applying incoming extended attributes. This can have a significant performance impact. Always enabled when \"Sync Extended Attributes\" is enabled.": "تصدير بيانات ثانوية، ولا يطبق البيانات الثانوية المستوردة. قد يؤثر سلبا على الأداء. يفعل تلقائيا عند تفعيل \"مزامنة البيانات الثانوية\".",
     "Enables sending ownership information to other devices, and applying incoming ownership information. Typically requires running with elevated privileges.": "يفعل إرسال معلومات الملكية للأجهزة الأخرى، ويفعل معلومات الملكية المستوردة. غالبا ما يطلب صلاحيات أكثر.",
@@ -166,6 +171,7 @@
     "Filter by date": "فلترة بالتاريخ",
     "Filter by name": "فلتر باستخدام الاسم",
     "Folder": "مجلد",
+    "Folder Group": "مجموعة المجلد",
     "Folder ID": "مُعرِّف المجلد",
     "Folder Label": "تسمية المجلد",
     "Folder Path": "مسار المجلد",
@@ -193,7 +199,7 @@
     "Help": "مساعدة",
     "Hint: only deny-rules detected while the default is deny. Consider adding \"permit any\" as last rule.": "ملحوظة: إذا كان الإعداد الافتراضي هو الرفض، وحدها قواعد الرفض تُرصد. جرب إضافة \"السماح للكل\" كخيار أخير.",
     "Home page": "الصفحة الرئيسية",
-    "However, your current settings indicate you might not want it enabled. We have disabled automatic crash reporting for you.": "ومع ذلك، تشير إعداداتك الحالية إلى أنك قد لا ترغب في تمكينه. لذلك توقف الإبلاغ التلقائي عن الأعطال.",
+    "However, your current settings indicate you might not want it enabled. We have disabled automatic crash reporting for you.": "ومع ذلك، تشير إعداداتك الحالية إلى أنك قد لا ترغب في تفعيله. لذلك توقف الإبلاغ التلقائي عن الأعطال.",
     "Identification": "المُعرِّف",
     "If untrusted, enter encryption password": "في حالة الرِّيبة، أدخل كلمة سر التشفير",
     "If you want to prevent other users on this computer from accessing Syncthing and through it your files, consider setting up authentication.": "إذا أردت منع المستخدمين الآخرين على هذا الحاسب من الوصول لملفاتك من خلال Syncthing، يُنصَح بإعداد وثائق الملكية.",
@@ -208,6 +214,7 @@
     "Incoming Rate Limit (KiB/s)": "الحد الأقصى البيانات الواردة (KiB/s)",
     "Incorrect configuration may damage your folder contents and render Syncthing inoperable.": "الإعدادات الغير صحيحة قد تدمر بيانات المجلد وتُفْشِلُ المزامنة.",
     "Incorrect user name or password.": "رُصِدَ خطأ في اسم المستخدم أو كلمة المرور.",
+    "Info": "معلومات",
     "Internally used paths:": "المسار المستخدم محليّا:",
     "Introduced By": "عرف بواسطة",
     "Introducer": "الوسيط",
@@ -225,6 +232,7 @@
     "Learn more": "اعرف أكثر",
     "Learn more at {%url%}": "اطلع على المزيد في {{url}}",
     "Limit": "الحد",
+    "Limit Bandwidth in LAN": "تحديد عرض النطاق الترددي في الشبكة المحلية",
     "Listener Failures": "أعطال المنصت",
     "Listener Status": "حالة المنصت",
     "Listeners": "المنصتين",
@@ -244,6 +252,7 @@
     "Log tailing paused. Scroll to the bottom to continue.": "تتبع السجل متوقف، مَرِّر للأسفل للاستئناف.",
     "Login failed, see Syncthing logs for details.": "فشل تسجيل الدخول، اطَّلِع على سِجِلِّ Syncthing للتفاصيل.",
     "Logs": "سجلات",
+    "Maintain an index of all blocks in the folder, enabling reuse of blocks from other files when syncing changes. Disable to reduce database size at the cost of not being able to reuse blocks across files.": "الاحتفاظ بفهرس لجميع الكُتل الموجودة في المجلد، مما يتيح إعادة استخدام الكتل من ملفات أخرى عند مزامنة التغييرات. عطّل هذا الخيار لتقليل حجم قاعدة البيانات، ولكن على حساب عدم القدرة على إعادة استخدام الكتل عبر الملفات المختلفة.",
     "Major Upgrade": "ترقية أساسية",
     "Mass actions": "التأثيرات العامة",
     "Maximum Age": "أقصى مدة",
@@ -274,6 +283,8 @@
     "Off": "اطفئ",
     "Oldest First": "الأقدم أولا",
     "Optional descriptive label for the folder. Can be different on each device.": "تسمية وصفية اختيارية للمجلد. يمكن أن تكون مختلفة على كل جهاز.",
+    "Optional group for the device. Can be different on each device.": "مجموعة اختيارية للجهاز. يمكن أن تختلف من جهاز لآخر.",
+    "Optional group for the folder. Can be different on each device.": "مجموعة اختيارية للمجلد. يمكن أن تختلف من جهاز لآخر.",
     "Options": "خيارات",
     "Out of Sync": "خارج التزامن",
     "Out of Sync Items": "عناصر خارج التزامن",
@@ -319,9 +330,9 @@
     "Release candidates contain the latest features and fixes. They are similar to the traditional bi-weekly Syncthing releases.": "مُمَهِّدات الإصدار تحتوي على آخر الخصائص والإصلاحات. وهي مماثلة للإصدارات النصف شهرية التقليدية لـ Syncthing .",
     "Remote Devices": "جهاز بعيد",
     "Remote GUI": "الواجهة النائية",
-    "Remove": "إزالة",
-    "Remove Device": "حذف جهاز",
-    "Remove Folder": "حذف مجلد",
+    "Remove": "أزِل",
+    "Remove Device": "أزِل الجهاز",
+    "Remove Folder": "أزِل المجلد",
     "Required identifier for the folder. Must be the same on all cluster devices.": "يتطلب معرفًا للمجلد. يجب أن يستخدم نفس المعرف لبقية الأجهزة.",
     "Rescan": "إعادة فحص",
     "Rescan All": "إعادة فحص الكل",
@@ -368,7 +379,7 @@
     "Show diff with previous version": "أظهر الفرق مقارنةً بالنسخة السابقة",
     "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "يُعرَض بدلا من المُعرِّف ضمن العناقيد. سيُروَّج للأجهزة الأخرى على أنه اسم أساسي محتمل.",
     "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "يُعرَض بدلا من المُعرِّف ضمن العناقيد. إذا تُرك فارغا، سيُحدَّث إلى الاسم المختار من قِبَل الجهاز.",
-    "Shutdown": "إغلاق",
+    "Shut Down": "إغلاق",
     "Shutdown Complete": "أُغلِق",
     "Simple": "بسيط",
     "Simple File Versioning": "التقسيم البسيط لإصدارات الملفات",
@@ -385,6 +396,7 @@
     "Staggered": "مترنِّح",
     "Staggered File Versioning": "تقسمات إصدارات الملف مهترئة",
     "Start Browser": "تشغيل المتصفح",
+    "Starting": "يبدأ",
     "Statistics": "إحصائيات",
     "Stay logged in": "ابقِ مُسجل الدخول",
     "Stopped": "متوقف",
@@ -510,14 +522,14 @@
     "Warning, this path is a subdirectory of an existing folder \"{%otherFolderLabel%}\" ({%otherFolder%}).": "تحذير، هذا المجلد هو أحد محتويات مجلد مضاف مسبقا \"{{otherFolderLabel}}\" ({{otherFolder}}).",
     "Warning: If you are using an external watcher like {%syncthingInotify%}, you should make sure it is deactivated.": "تحذير: إذا كنت مستخدما لمراقب خارجي كـ {{syncthingInotify}}، تأكد من تعطيله.",
     "Watch for Changes": "راقب التغييرات",
-    "Watching for Changes": "جاري مراقبة التغيرات",
+    "Watching for Changes": "يراقب التغيرات",
     "Watching for changes discovers most changes without periodic scanning.": "مراقبة التغييرات تكشف معظم التغييرات دون إجراء المسح الدوري.",
     "When adding a new device, keep in mind that this device must be added on the other side too.": "يجب إضافة الأجهزة الجديدة في الطرفين.",
     "When adding a new folder, keep in mind that the Folder ID is used to tie folders together between devices. They are case sensitive and must match exactly between all devices.": "عند إضافة مجلد جديد ، ضع في الاعتبار أن معرف المجلد يُستخدم لربط المجلدات معًا بين الأجهزة المختلفة. وهي حساسة لحالة الأحرف لذا يجب أن تتطابق تمامًا بين جميع الأجهزة.",
     "When set to more than one on both devices, Syncthing will attempt to establish multiple concurrent connections. If the values differ, the highest will be used. Set to zero to let Syncthing decide.": "إذا عُرفَّ Syncthing بأنه أكثر من واحد على كلا الجهازين، فإنه سيحاول إقامة عدة اتصالات متوازية. إذا اختلفت القِيَم، أعلاها ستُستخدَم. صَفِّرها لتترك القرار لـ Syncthing.",
     "Yes": "نعم",
     "Yesterday": "أمس",
-    "You can also copy and paste the text into a new message manually.": "يكنك نسخ النص لتدرجه في رسالة جديدة بنفسك.",
+    "You can also copy and paste the text into a new message manually.": "يمكنك نسخ النص ولصقه في رسالة جديدة يدويًا.",
     "You can also select one of these nearby devices:": "يمكنك أيضا اختيار واحدة من الأجهزة القريبة:",
     "You can change your choice at any time in the Settings dialog.": "يمكنك تغيير اختيارك في أي وقت بواسطة الاعدادات.",
     "You can read more about the two release channels at the link below.": "يمكنك قراءة المزيد عن إصداريّ القناتين عبر الرابط بالأسفل.",
@@ -529,7 +541,7 @@
     "Your SMS app should open to let you choose the recipient and send it from your own number.": "ينبغي أن يسمح تطبيق SMS لديك بأن تختار مستلما ويرسلها من رقمك.",
     "Your email app should open to let you choose the recipient and send it from your own address.": "ينبغي أن يسمح تطبيق البريد الإلكتروني الخاص بك باختيار مستلم و أن يرسلها من عنوانك.",
     "days": "أيام",
-    "deleted": "مُسِحَ",
+    "deleted": "حُذِف",
     "deny": "امنع",
     "directories": "مجلدات",
     "file": "ملف",

gui/default/assets/lang/lang-az.json

@@ -0,0 +1,2 @@
+{
+}

gui/default/assets/lang/lang-be.json

@@ -27,6 +27,7 @@
     "Allowed Networks": "Дазволеныя Сеткі",
     "Alphabetic": "Па Алфавіту",
     "Altered by ignoring deletes.": "Зменена з-за ігнаравання выдаленняў.",
+    "Always turned on when the folder type is \"{%foldertype%}\".": "Заўсёды ўключана для папак з тыпам \"{{foldertype}}\".",
     "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "Знешняя каманда утрымлівае версіянаванне. Яно патрабуе выдалення файла з агульнай дырэкторыі. Калі шлях да прыкладання ўтрымлівае прабелы, трэба іх выдаліць.",
     "Anonymous Usage Reporting": "Ананімная Спрадвыздача Аб Выкарыстанні",
     "Anonymous usage report format has changed. Would you like to move to the new format?": "Фармат ананімнай спрадвыздачы аб выкарыстанні быў зменены. Ці жадаеце вы выкарыстоўваць новы фармат?",
@@ -152,7 +153,7 @@
     "Show ID": "Паказаць ID",
     "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.",
     "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.",
-    "Shutdown": "Выключыць",
+    "Shut Down": "Выключыць",
     "Shutdown Complete": "Выключэньне завершанае",
     "Simple File Versioning": "Простае захоўваньне вэрсій",
     "Single level wildcard (matches within a directory only)": "Single level wildcard (matches within a directory only)",

gui/default/assets/lang/lang-bg.json

@@ -50,6 +50,7 @@
     "Automatically create or share folders that this device advertises at the default path.": "Автоматично създава в подразбираната папка или споделя папките, които устройството предлага.",
     "Available debug logging facilities:": "Достъпни улеснения при отстраняване на дефекти:",
     "Be careful!": "Внимание!",
+    "Block Indexing": "Индексиране на блокове",
     "Body:": "Съдържание:",
     "Bugs": "Дефекти",
     "Cancel": "Отказ",
@@ -82,6 +83,7 @@
     "Custom Range": "В периода",
     "Danger!": "Опасност!",
     "Database Location": "Местоположение на хранилището",
+    "Debug": "Отстраняване на дефекти",
     "Debugging Facilities": "Отстраняване на дефекти",
     "Default": "По подразбиране",
     "Default Configuration": "Настройки по подразбиране",
@@ -98,6 +100,7 @@
     "Device": "Устройство",
     "Device \"{%name%}\" ({%device%} at {%address%}) wants to connect. Add new device?": "Устройство \"{{name}}\" ({{device}}) с адрес {{address}} желае да се свърже. Да бъде ли добавено?",
     "Device Certificate": "Сертификат на устройството",
+    "Device Group": "Група устройства",
     "Device ID": "Идентификатор на устройство",
     "Device Identification": "Идентификатор на устройство",
     "Device Name": "Име на устройството",
@@ -168,6 +171,7 @@
     "Filter by date": "Филтриране по дата",
     "Filter by name": "Филтриране по име",
     "Folder": "Папка",
+    "Folder Group": "Група папки",
     "Folder ID": "Идентификатор на папката",
     "Folder Label": "Име на папката",
     "Folder Path": "Път до папката",
@@ -176,7 +180,7 @@
     "Folder type \"{%receiveEncrypted%}\" can only be set when adding a new folder.": "Вида „{{receiveEncrypted}}“ може да бъде избран само при добавяне на папка.",
     "Folder type \"{%receiveEncrypted%}\" cannot be changed after adding the folder. You need to remove the folder, delete or decrypt the data on disk, and add the folder again.": "Видът папката „{{receiveEncrypted}}“ не може да бъде променян след нейното създаване. Трябва да я премахнете, изтриете или разшифровате съдържанието и да добавите папката отново.",
     "Folders": "Папки",
-    "For the following folders an error occurred while starting to watch for changes. It will be retried every minute, so the errors might go away soon. If they persist, try to fix the underlying issue and ask for help if you can't.": "Грешка при започване на наблюдението за промени на следните папки. Всяка минута ще бъде извършван нов опит, така че грешката скоро може да изчезне. Ако все пак не изчезне, отстранете нейната първопричина или потърсете помощ ако не съумявате.",
+    "For the following folders an error occurred while starting to watch for changes. It will be retried every minute, so the errors might go away soon. If they persist, try to fix the underlying issue and ask for help if you can't.": "Грешка при започване на наблюдението за промени на следните папки. Всяка минута ще бъде извършван нов опит, така че грешката скоро може да изчезне. Ако все пак не изчезне, отстранете първопричината или ако не съумявате потърсете помощ.",
     "Forever": "Завинаги",
     "Full Rescan Interval (s)": "Интервал на пълно обхождане (секунди)",
     "GUI": "Интерфейс",
@@ -210,6 +214,7 @@
     "Incoming Rate Limit (KiB/s)": "Ограничение при изтегляне (КиБ/с)",
     "Incorrect configuration may damage your folder contents and render Syncthing inoperable.": "Неправилни настройки могат да повредят файлове и да попречат на синхронизирането.",
     "Incorrect user name or password.": "Грешно потребителско име или парола.",
+    "Info": "Сведения",
     "Internally used paths:": "Вътрешно използвани пътища:",
     "Introduced By": "Предложено от",
     "Introducer": "Поръчител",
@@ -227,6 +232,7 @@
     "Learn more": "Научете повече",
     "Learn more at {%url%}": "Научете повече на {{url}}",
     "Limit": "Ограничение",
+    "Limit Bandwidth in LAN": "Огранич. на скоростта в местната мрежа",
     "Listener Failures": "Грешки при очакване на връзка",
     "Listener Status": "Очакване на връзка",
     "Listeners": "Очакване на връзка",
@@ -246,6 +252,7 @@
     "Log tailing paused. Scroll to the bottom to continue.": "Добавяне на редове към дневника е спряно. Плъзнете най-долу за да продължи.",
     "Login failed, see Syncthing logs for details.": "Грешка при вход, за подробности проверете в дневника на Syncthing.",
     "Logs": "Дневници",
+    "Maintain an index of all blocks in the folder, enabling reuse of blocks from other files when syncing changes. Disable to reduce database size at the cost of not being able to reuse blocks across files.": "Поддържане на индекс на всички блокове в папката, което позволява повторното им използване от други файлове при синхронизиране на промените. Изключете, за да намалите размера на базата данни за сметка на невъзможността да използвате блокове между различните файлове.",
     "Major Upgrade": "Обновяване на значимо издание",
     "Mass actions": "Мащабни действия",
     "Maximum Age": "Максимална възраст",
@@ -276,6 +283,8 @@
     "Off": "Изключено",
     "Oldest First": "Първо най-старите",
     "Optional descriptive label for the folder. Can be different on each device.": "Незадължително име на папката. Може да бъде различно на всяко устройство.",
+    "Optional group for the device. Can be different on each device.": "Незадължителна група за устройството. Може да е различна за всяко устройство.",
+    "Optional group for the folder. Can be different on each device.": "Незадължителна група за папката. Може да е различна на всяко устройство.",
     "Options": "Настройки",
     "Out of Sync": "Несинхронизирано",
     "Out of Sync Items": "Несинхронизирани елементи",
@@ -370,7 +379,7 @@
     "Show diff with previous version": "Показване на разликите с предходната версия",
     "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "В списъка на устройствата се показва вместо идентификатор. Ще бъде предложено на другите устройства като име по подразбиране.",
     "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "В списъка на устройствата се показва вместо идентификатор. Ако бъде оставено празно ще бъде променено на името, което носи устройството.",
-    "Shutdown": "Изключване",
+    "Shut Down": "Изключване",
     "Shutdown Complete": "Спирането завършено",
     "Simple": "Обикновени",
     "Simple File Versioning": "Обикновени версии",
@@ -387,6 +396,7 @@
     "Staggered": "Разпределени",
     "Staggered File Versioning": "Разпределени версии",
     "Start Browser": "Отваряне на мрежов четец",
+    "Starting": "Стартиране",
     "Statistics": "Статистика",
     "Stay logged in": "Оставане в системата",
     "Stopped": "Спряна",
@@ -528,7 +538,7 @@
     "You have unsaved changes. Do you really want to discard them?": "Има незапазени промени. Желаете ли да се откажете от тях?",
     "You must keep at least one version.": "Необходимо е да запазите поне една версия.",
     "You should never add or change anything locally in a \"{%receiveEncrypted%}\" folder.": "Никога не трябва да променяте нищо в папка от вида „{{receiveEncrypted}}“.",
-    "Your SMS app should open to let you choose the recipient and send it from your own number.": "Приложението за SMS би трябвало да се отвори, да ви даде възможност да изберете получател, за да изпратите съобщението от вашия телефонен номер.",
+    "Your SMS app should open to let you choose the recipient and send it from your own number.": "Приложението за SMS би трябвало да се отвори, да ви даде възможност да изберете получател, на когото да изпратите съобщението от вашия телефонен номер.",
     "Your email app should open to let you choose the recipient and send it from your own address.": "Пощенският клиент би трябвало да се отвори, да ви даде възможност да изберете получател, за да изпратите съобщението от вашия адрес за електронна поща.",
     "days": "дни",
     "deleted": "премахнато",

gui/default/assets/lang/lang-ca.json

@@ -27,6 +27,7 @@
     "Allowed Networks": "Xarxes permeses",
     "Alphabetic": "Alfabètic",
     "Altered by ignoring deletes.": "S'ha alterat ignorant les supressions.",
+    "Always turned on when the folder type is \"{%foldertype%}\".": "Sempre activat quan el tipus de carpeta és \"{{foldertype}}\".",
     "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "Una ordre externa gestiona la versió. Ha d'eliminar el fitxer de la carpeta compartida. Si el camí a l'aplicació conté espais, s'ha de citar.",
     "Anonymous Usage Reporting": "Informe anònim d'ús",
     "Anonymous usage report format has changed. Would you like to move to the new format?": "El format de l'informe d'ús anònim ha canviat. Voleu canviar a aquest nou format?",
@@ -52,6 +53,7 @@
     "Body:": "Cos de text:",
     "Bugs": "Errors (Bugs)",
     "Cancel": "Cancel·la",
+    "Cannot be enabled when the folder type is \"{%foldertype%}\".": "No es pot habilitar quan el tipus de carpeta és \"{{foldertype}}\".",
     "Changelog": "Historial de canvis",
     "Clean out after": "Netejar després",
     "Cleaning Versions": "Netejant versions",
@@ -80,6 +82,7 @@
     "Custom Range": "Interval personalitzat",
     "Danger!": "Perill!",
     "Database Location": "Ubicació de la base de dades",
+    "Debug": "Depuració",
     "Debugging Facilities": "Utilitats de Depuració",
     "Default": "Per defecte",
     "Default Configuration": "Configuració predeterminada",
@@ -208,6 +211,7 @@
     "Incoming Rate Limit (KiB/s)": "Límit de velocitat d'entrada (KiB/s)",
     "Incorrect configuration may damage your folder contents and render Syncthing inoperable.": "Una configuració incorrecta pot malmetre els continguts de la teva carpeta i que Syncthing esdevingui inoperatiu.",
     "Incorrect user name or password.": "Nom d'usuari o contrasenya incorrecta.",
+    "Info": "Informació",
     "Internally used paths:": "Camins utilitzats internament:",
     "Introduced By": "Introduït per",
     "Introducer": "Introductor",
@@ -225,6 +229,7 @@
     "Learn more": "Aprèn més",
     "Learn more at {%url%}": "Més informació a {{url}}",
     "Limit": "Límit",
+    "Limit Bandwidth in LAN": "Limita l'amplada de banda a la LAN",
     "Listener Failures": "Errors en l'escolta",
     "Listener Status": "Estat de l'oient",
     "Listeners": "Oients",
@@ -368,7 +373,7 @@
     "Show diff with previous version": "Mostra la diferència amb la versió anterior",
     "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "Mostrat en comptes del ID del Node en l'estat del cluster. Serà advertit als altres dispositius com un nom opcional per defecte.",
     "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "Mostrat en comptes del ID del Node en l'estat del cluster. S'actualitzarà al nom del dispositiu si es deixa buit.",
-    "Shutdown": "Apaga",
+    "Shut Down": "Apaga",
     "Shutdown Complete": "Apagat complet",
     "Simple": "Simple",
     "Simple File Versioning": "Versionat de Fitxers Senzill",

gui/default/assets/lang/lang-ca@valencia.json

@@ -67,7 +67,7 @@
     "Connection Type": "Tipus de connexió",
     "Connections": "Connexions",
     "Connections via relays might be rate limited by the relay": "Les connexions mitjançant relés poden estar limitades pel relé",
-    "Continuously watching for changes is now available within Syncthing. This will detect changes on disk and issue a scan on only the modified paths. The benefits are that changes are propagated quicker and that less full scans are required.": "Ara està disponible la revisió continua de canvix dins de Syncthing. Acò detectarà els canvis i llençarà un escaneig sols a les rutes modificades. Els beneficis són que els canvis es propaguen mé ràpidamente i es necessiten menys escanejos complets.",
+    "Continuously watching for changes is now available within Syncthing. This will detect changes on disk and issue a scan on only the modified paths. The benefits are that changes are propagated quicker and that less full scans are required.": "Ara està disponible la revisió continua de canvis dins de Syncthing. Això detectarà els canvis i llançarà un escaneig sols a les rutes modificades. Els beneficis són que els canvis es propaguen més ràpidament i es necessiten menys escanejos complets.",
     "Copied from elsewhere": "Copiat de qualsevol lloc",
     "Copied from original": "Copiat de l'original",
     "Copied!": "Copiat!",
@@ -353,7 +353,7 @@
     "Show diff with previous version": "Mostrar les diferències amb la versió prèvia",
     "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "Mostrat en lloc de l'ID del dispositiu en l'estat del grup (cluster). S'anunciarà als altres dispositius com el nom opcional per defecte.",
     "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "Mostrat en lloc de l'ID del dispositiu en l'estat del grup (cluster). S'actualitzarà al nom que el dispositiu anuncia si es deixa buit.",
-    "Shutdown": "Apagar",
+    "Shut Down": "Apagar",
     "Shutdown Complete": "Apagar completament",
     "Simple": "Senzill",
     "Simple File Versioning": "Versionat de fitxers senzill",

gui/default/assets/lang/lang-ckb.json

@@ -0,0 +1,2 @@
+{
+}

gui/default/assets/lang/lang-cs.json

@@ -360,7 +360,7 @@
     "Show diff with previous version": "Ukázat rozdíl oproti předchozí verzi",
     "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "Zobrazeno místo identifikátoru zařízení na náhledu stavu clusteru. Bude odesíláno ostatním zařízením jako výchozí název zařízení.",
     "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "Zobrazeno místo identifikátoru zařízení na náhledu stavu clusteru. Pokud nebude vyplněno, bude nastaveno na název, který zařízení odesílá.",
-    "Shutdown": "Vypnout",
+    "Shut Down": "Vypnout",
     "Shutdown Complete": "Vypnutí dokončeno",
     "Simple": "Jednoduché",
     "Simple File Versioning": "Jednoduchá správa verzí souborů",

gui/default/assets/lang/lang-da.json

@@ -368,7 +368,7 @@
     "Show diff with previous version": "Vis forskelle fra tidligere version",
     "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "Vises i stedet for enheds-ID i klyngestatus. Vil blive sendt til andre enheder som valgfrit standardnavn.",
     "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "Vises i stedet for enheds-ID i klyngestatus. Vil blive opdateret til det navn, som enheden sender, hvis det ikke er udfyldt.",
-    "Shutdown": "Luk ned",
+    "Shut Down": "Luk ned",
     "Shutdown Complete": "Nedlukning fuldført",
     "Simple": "Enkel",
     "Simple File Versioning": "Simpel filversionering",

gui/default/assets/lang/lang-de.json

@@ -50,6 +50,7 @@
     "Automatically create or share folders that this device advertises at the default path.": "Automatisch Ordner im Standardpfad erstellen oder freigeben, die dieses Gerät ankündigt.",
     "Available debug logging facilities:": "Verfügbare Debugging-Möglichkeiten:",
     "Be careful!": "Vorsicht!",
+    "Block Indexing": "Blockindizierung",
     "Body:": "Nachrichtentext:",
     "Bugs": "Fehler",
     "Cancel": "Abbrechen",
@@ -61,7 +62,7 @@
     "Click to see full identification string and QR code.": "Klicken, um die vollständige Kennung und den QR-Code anzuzeigen.",
     "Close": "Schließen",
     "Command": "Befehl",
-    "Comment, when used at the start of a line": "Kommentar, wenn am Anfang der Zeile verwendet.",
+    "Comment, when used at the start of a line": "Kommentar, wenn am Anfang der Zeile verwendet",
     "Compression": "Komprimierung",
     "Configuration Directory": "Konfigurationsverzeichnis",
     "Configuration File": "Konfigurationsdatei",
@@ -82,6 +83,7 @@
     "Custom Range": "Eigener Zeitraum",
     "Danger!": "Achtung!",
     "Database Location": "Datenbank-Speicherort",
+    "Debug": "Debug",
     "Debugging Facilities": "Debugging-Möglichkeiten",
     "Default": "Vorgabe",
     "Default Configuration": "Vorgabekonfiguration",
@@ -98,13 +100,14 @@
     "Device": "Gerät",
     "Device \"{%name%}\" ({%device%} at {%address%}) wants to connect. Add new device?": "Gerät „{{name}}“ ({{device}} {{address}}) möchte sich verbinden. Gerät hinzufügen?",
     "Device Certificate": "Gerätezertifikat",
+    "Device Group": "Gerätegruppe",
     "Device ID": "Gerätekennung",
     "Device Identification": "Geräteidentifikation",
     "Device Name": "Gerätename",
     "Device Status": "Gerätestatus",
     "Device is untrusted, enter encryption password": "Gerät wird nicht vertraut, Verschlüsselungspasswort eingeben",
     "Device rate limits": "Datenratenbegrenzungen fürs Gerät",
-    "Device that last modified the item": "Gerät, das das Element zuletzt geändert hat",
+    "Device that last modified the item": "Gerät, welches das Element zuletzt geändert hat",
     "Devices": "Geräte",
     "Disable Crash Reporting": "Absturzmeldung deaktivieren",
     "Disabled": "Deaktiviert",
@@ -168,6 +171,7 @@
     "Filter by date": "Nach Datum sortieren",
     "Filter by name": "Nach Namen sortieren",
     "Folder": "Ordner",
+    "Folder Group": "Ordnergruppe",
     "Folder ID": "Ordnerkennung",
     "Folder Label": "Ordnerbezeichnung",
     "Folder Path": "Ordnerpfad",
@@ -183,7 +187,7 @@
     "GUI / API HTTPS Certificate": "GUI / API HTTPS-Zertifikat",
     "GUI Authentication Password": "Passwort für Zugang zur Benutzeroberfläche",
     "GUI Authentication User": "Benutzername für Zugang zur Benutzeroberfläche",
-    "GUI Authentication: Set User and Password": "Authentifizierung für die Benutzeroberfläche: Geben Sie Benutzer und Passwort ein.",
+    "GUI Authentication: Set User and Password": "Authentifizierung für die Benutzeroberfläche: Geben Sie Benutzer und Passwort ein",
     "GUI Listen Address": "Adresse der Benutzeroberfläche",
     "GUI Override Directory": "GUI-Ersatz-Verzeichnis",
     "GUI Theme": "GUI-Design",
@@ -210,6 +214,7 @@
     "Incoming Rate Limit (KiB/s)": "Eingehende Datenratenbegrenzung (KiB/s)",
     "Incorrect configuration may damage your folder contents and render Syncthing inoperable.": "Eine falsche Konfiguration kann den Ordnerinhalt beschädigen und Syncthing in einen unausführbaren Zustand versetzen.",
     "Incorrect user name or password.": "Falscher Benutzername oder Passwort.",
+    "Info": "Info",
     "Internally used paths:": "Intern verwendete Pfade:",
     "Introduced By": "Verteilt von",
     "Introducer": "Verteilergerät",
@@ -227,6 +232,7 @@
     "Learn more": "Mehr erfahren",
     "Learn more at {%url%}": "Erfahren Sie mehr unter {{url}}",
     "Limit": "Limit",
+    "Limit Bandwidth in LAN": "Bandbreite im LAN begrenzen",
     "Listener Failures": "Fehler bei Listener",
     "Listener Status": "Status der Listener",
     "Listeners": "Zuhörer",
@@ -246,6 +252,7 @@
     "Log tailing paused. Scroll to the bottom to continue.": "Protokolländerungsverfolgung angehalten. Zum Ende blättern, um fortzufahren.",
     "Login failed, see Syncthing logs for details.": "Anmeldung fehlgeschlagen, siehe Syncthing-Protokolle für Details.",
     "Logs": "Protokolle",
+    "Maintain an index of all blocks in the folder, enabling reuse of blocks from other files when syncing changes. Disable to reduce database size at the cost of not being able to reuse blocks across files.": "Ein Index über alle Blöcke im Ordner führen, sodass Blöcke aus anderen Dateien bei der Synchronisierung von Änderungen wiederverwendet werden können. Diese Option deaktivieren, um die Datenbankgröße zu verringern – allerdings können Blöcke dann nicht mehr dateiübergreifend wiederverwendet werden.",
     "Major Upgrade": "Hauptversionsaktualisierung",
     "Mass actions": "Massenaktionen",
     "Maximum Age": "Höchstalter",
@@ -276,6 +283,8 @@
     "Off": "Aus",
     "Oldest First": "Älteste zuerst",
     "Optional descriptive label for the folder. Can be different on each device.": "Optionale beschreibende Bezeichnung des Ordners. Kann auf jedem Gerät unterschiedlich sein.",
+    "Optional group for the device. Can be different on each device.": "Optionale Gruppe für das Gerät. Kann auf jedem Gerät unterschiedlich sein.",
+    "Optional group for the folder. Can be different on each device.": "Optionale Gruppe für den Ordner. Kann auf jedem Gerät unterschiedlich sein.",
     "Options": "Optionen",
     "Out of Sync": "Nicht synchronisiert",
     "Out of Sync Items": "Nicht synchronisierte Elemente",
@@ -288,7 +297,7 @@
     "Path to the folder on the local computer. Will be created if it does not exist. The tilde character (~) can be used as a shortcut for": "Pfad zum Ordner auf dem lokalen Gerät. Ordner wird erzeugt, wenn er nicht existiert. Das Tilde-Zeichen (~) kann als Abkürzung verwendet werden für",
     "Path where versions should be stored (leave empty for the default .stversions directory in the shared folder).": "Pfad, in dem Versionen gespeichert werden sollen (leer lassen für den Standardordner .stversions im freigegebenen Ordner).",
     "Paths": "Pfade",
-    "Pause": "Pause",
+    "Pause": "Pausiert",
     "Pause All": "Alles pausieren",
     "Paused": "Pausiert",
     "Paused (Unused)": "Pausiert (nicht genutzt)",
@@ -370,7 +379,7 @@
     "Show diff with previous version": "Unterschied zur vorherigen Version anzeigen",
     "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "Wird anstelle der Gerätekennung im Verbundstatus angezeigt. Wird anderen Geräten als optionaler Standardname bekannt gegeben.",
     "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "Wird anstelle der Gerätekennung im Verbundstatus angezeigt. Wird auf den Namen aktualisiert, den das Gerät anzeigt, wenn er leer bleibt.",
-    "Shutdown": "Herunterfahren",
+    "Shut Down": "Herunterfahren",
     "Shutdown Complete": "Vollständig heruntergefahren",
     "Simple": "Einfach",
     "Simple File Versioning": "Einfache Dateiversionierung",
@@ -387,6 +396,7 @@
     "Staggered": "Stufenweise",
     "Staggered File Versioning": "Stufenweise Dateiversionierung",
     "Start Browser": "Browser starten",
+    "Starting": "Startet",
     "Statistics": "Statistiken",
     "Stay logged in": "Angemeldet bleiben",
     "Stopped": "Gestoppt",

gui/default/assets/lang/lang-el.json

@@ -368,7 +368,7 @@
     "Show diff with previous version": "Εμφάνιση διαφορών με προηγούμενη έκδοση",
     "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "Θα φαίνεται αντί για την ταυτότητα της συσκευής στην προβολή της κατάστασης ολόκληρης της συστάδας. Θα γνωστοποιείται σαν το προαιρετικό όνομα της συσκευής.",
     "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "Θα φαίνεται αντί για την ταυτότητα της συσκευής στην προβολή της κατάστασης ολόκληρης της συστάδας. Θα ενημερώνεται αυτόματα αν αλλάξει το όνομα της συσκευής.",
-    "Shutdown": "Απενεργοποίηση",
+    "Shut Down": "Απενεργοποίηση",
     "Shutdown Complete": "Πλήρης απενεργοποίηση",
     "Simple": "Απλό",
     "Simple File Versioning": "Απλή τήρηση εκδόσεων",
@@ -397,7 +397,7 @@
     "Sync Protocol Listen Addresses": "Διευθύνσεις για το πρωτόκολλο συγχρονισμού",
     "Sync Status": "Κατάσταση συγχρονισμού",
     "Syncing": "Συγχρονίζω",
-    "Syncthing device ID for \"{%devicename%}\"": "Συγχρονισμός αναγνωριστικού συσκευής για \"{{devicename}}\"",
+    "Syncthing device ID for \"{%devicename%}\"": "Αναγνωριστικό Syncthing για συσκευή \"{{devicename}}\"",
     "Syncthing has been shut down.": "Το Syncthing έχει απενεργοποιηθεί.",
     "Syncthing includes the following software or portions thereof:": "Το Syncthing περιλαμβάνει τα παρακάτω λογισμικά ή μέρη αυτών:",
     "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Το Syncthing είναι ελεύθερο λογισμικό και ανοικτού κώδικα, με άδεια MPL v2.0.",

gui/default/assets/lang/lang-en-AU.json

@@ -353,7 +353,7 @@
     "Show diff with previous version": "Show diff with previous version",
     "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.",
     "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.",
-    "Shutdown": "Shutdown",
+    "Shut Down": "Shut Down",
     "Shutdown Complete": "Shutdown Complete",
     "Simple": "Simple",
     "Simple File Versioning": "Simple File Versioning",

gui/default/assets/lang/lang-en-GB.json

@@ -27,6 +27,7 @@
     "Allowed Networks": "Allowed Networks",
     "Alphabetic": "Alphabetic",
     "Altered by ignoring deletes.": "Altered by ignoring deletes.",
+    "Always turned on when the folder type is \"{%foldertype%}\".": "Always turned on when the folder type is \"{{foldertype}}\".",
     "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.",
     "Anonymous Usage Reporting": "Anonymous Usage Reporting",
     "Anonymous usage report format has changed. Would you like to move to the new format?": "Anonymous usage report format has changed. Would you like to move to the new format?",
@@ -49,9 +50,11 @@
     "Automatically create or share folders that this device advertises at the default path.": "Automatically create or share folders that this device advertises at the default path.",
     "Available debug logging facilities:": "Available debug logging facilities:",
     "Be careful!": "Be careful!",
+    "Block Indexing": "Block Indexing",
     "Body:": "Body:",
     "Bugs": "Bugs",
     "Cancel": "Cancel",
+    "Cannot be enabled when the folder type is \"{%foldertype%}\".": "Cannot be enabled when the folder type is \"{{foldertype}}\".",
     "Changelog": "Changelog",
     "Clean out after": "Clean out after",
     "Cleaning Versions": "Cleaning Versions",
@@ -80,6 +83,7 @@
     "Custom Range": "Custom Range",
     "Danger!": "Danger!",
     "Database Location": "Database Location",
+    "Debug": "Debug",
     "Debugging Facilities": "Debugging Facilities",
     "Default": "Default",
     "Default Configuration": "Default Configuration",
@@ -96,6 +100,7 @@
     "Device": "Device",
     "Device \"{%name%}\" ({%device%} at {%address%}) wants to connect. Add new device?": "Device \"{{name}}\" ({{device}} at {{address}}) wants to connect. Add new device?",
     "Device Certificate": "Device Certificate",
+    "Device Group": "Device Group",
     "Device ID": "Device ID",
     "Device Identification": "Device Identification",
     "Device Name": "Device Name",
@@ -166,6 +171,7 @@
     "Filter by date": "Filter by date",
     "Filter by name": "Filter by name",
     "Folder": "Folder",
+    "Folder Group": "Folder Group",
     "Folder ID": "Folder ID",
     "Folder Label": "Folder Label",
     "Folder Path": "Folder Path",
@@ -208,6 +214,7 @@
     "Incoming Rate Limit (KiB/s)": "Incoming Rate Limit (KiB/s)",
     "Incorrect configuration may damage your folder contents and render Syncthing inoperable.": "Incorrect configuration may damage your folder contents and render Syncthing inoperable.",
     "Incorrect user name or password.": "Incorrect username or password.",
+    "Info": "Info",
     "Internally used paths:": "Internally used paths:",
     "Introduced By": "Introduced By",
     "Introducer": "Introducer",
@@ -225,6 +232,7 @@
     "Learn more": "Learn more",
     "Learn more at {%url%}": "Learn more at {{url}}",
     "Limit": "Limit",
+    "Limit Bandwidth in LAN": "Limit Bandwidth in LAN",
     "Listener Failures": "Listener Failures",
     "Listener Status": "Listener Status",
     "Listeners": "Listeners",
@@ -244,6 +252,7 @@
     "Log tailing paused. Scroll to the bottom to continue.": "Log tailing paused. Scroll to the bottom to continue.",
     "Login failed, see Syncthing logs for details.": "Login failed, see Syncthing logs for details.",
     "Logs": "Logs",
+    "Maintain an index of all blocks in the folder, enabling reuse of blocks from other files when syncing changes. Disable to reduce database size at the cost of not being able to reuse blocks across files.": "Maintain an index of all blocks in the folder, enabling reuse of blocks from other files when syncing changes. Disable to reduce database size at the cost of not being able to reuse blocks across files.",
     "Major Upgrade": "Major Upgrade",
     "Mass actions": "Mass actions",
     "Maximum Age": "Maximum Age",
@@ -274,6 +283,8 @@
     "Off": "Off",
     "Oldest First": "Oldest First",
     "Optional descriptive label for the folder. Can be different on each device.": "Optional descriptive label for the folder. Can be different on each device.",
+    "Optional group for the device. Can be different on each device.": "Optional group for the device. Can be different on each device.",
+    "Optional group for the folder. Can be different on each device.": "Optional group for the folder. Can be different on each device.",
     "Options": "Options",
     "Out of Sync": "Out of Sync",
     "Out of Sync Items": "Out of Sync Items",
@@ -368,7 +379,7 @@
     "Show diff with previous version": "Show diff with previous version",
     "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.",
     "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.",
-    "Shutdown": "Shutdown",
+    "Shut Down": "Shut Down",
     "Shutdown Complete": "Shutdown Complete",
     "Simple": "Simple",
     "Simple File Versioning": "Simple File Versioning",
@@ -385,6 +396,7 @@
     "Staggered": "Staggered",
     "Staggered File Versioning": "Staggered File Versioning",
     "Start Browser": "Start Browser",
+    "Starting": "Starting",
     "Statistics": "Statistics",
     "Stay logged in": "Stay logged in",
     "Stopped": "Stopped",

gui/default/assets/lang/lang-en.json

@@ -50,6 +50,7 @@
     "Automatically create or share folders that this device advertises at the default path.": "Automatically create or share folders that this device advertises at the default path.",
     "Available debug logging facilities:": "Available debug logging facilities:",
     "Be careful!": "Be careful!",
+    "Block Indexing": "Block Indexing",
     "Body:": "Body:",
     "Bugs": "Bugs",
     "Cancel": "Cancel",
@@ -82,6 +83,7 @@
     "Custom Range": "Custom Range",
     "Danger!": "Danger!",
     "Database Location": "Database Location",
+    "Debug": "Debug",
     "Debugging Facilities": "Debugging Facilities",
     "Default": "Default",
     "Default Configuration": "Default Configuration",
@@ -98,6 +100,7 @@
     "Device": "Device",
     "Device \"{%name%}\" ({%device%} at {%address%}) wants to connect. Add new device?": "Device \"{{name}}\" ({{device}} at {{address}}) wants to connect. Add new device?",
     "Device Certificate": "Device Certificate",
+    "Device Group": "Device Group",
     "Device ID": "Device ID",
     "Device Identification": "Device Identification",
     "Device Name": "Device Name",
@@ -168,6 +171,7 @@
     "Filter by date": "Filter by date",
     "Filter by name": "Filter by name",
     "Folder": "Folder",
+    "Folder Group": "Folder Group",
     "Folder ID": "Folder ID",
     "Folder Label": "Folder Label",
     "Folder Path": "Folder Path",
@@ -210,6 +214,7 @@
     "Incoming Rate Limit (KiB/s)": "Incoming Rate Limit (KiB/s)",
     "Incorrect configuration may damage your folder contents and render Syncthing inoperable.": "Incorrect configuration may damage your folder contents and render Syncthing inoperable.",
     "Incorrect user name or password.": "Incorrect user name or password.",
+    "Info": "Info",
     "Internally used paths:": "Internally used paths:",
     "Introduced By": "Introduced By",
     "Introducer": "Introducer",
@@ -227,6 +232,7 @@
     "Learn more": "Learn more",
     "Learn more at {%url%}": "Learn more at {{url}}",
     "Limit": "Limit",
+    "Limit Bandwidth in LAN": "Limit Bandwidth in LAN",
     "Listener Failures": "Listener Failures",
     "Listener Status": "Listener Status",
     "Listeners": "Listeners",
@@ -246,6 +252,7 @@
     "Log tailing paused. Scroll to the bottom to continue.": "Log tailing paused. Scroll to the bottom to continue.",
     "Login failed, see Syncthing logs for details.": "Login failed, see Syncthing logs for details.",
     "Logs": "Logs",
+    "Maintain an index of all blocks in the folder, enabling reuse of blocks from other files when syncing changes. Disable to reduce database size at the cost of not being able to reuse blocks across files.": "Maintain an index of all blocks in the folder, enabling reuse of blocks from other files when syncing changes. Disable to reduce database size at the cost of not being able to reuse blocks across files.",
     "Major Upgrade": "Major Upgrade",
     "Mass actions": "Mass actions",
     "Maximum Age": "Maximum Age",
@@ -276,6 +283,8 @@
     "Off": "Off",
     "Oldest First": "Oldest First",
     "Optional descriptive label for the folder. Can be different on each device.": "Optional descriptive label for the folder. Can be different on each device.",
+    "Optional group for the device. Can be different on each device.": "Optional group for the device. Can be different on each device.",
+    "Optional group for the folder. Can be different on each device.": "Optional group for the folder. Can be different on each device.",
     "Options": "Options",
     "Out of Sync": "Out of Sync",
     "Out of Sync Items": "Out of Sync Items",
@@ -370,7 +379,7 @@
     "Show diff with previous version": "Show diff with previous version",
     "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.",
     "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.",
-    "Shutdown": "Shutdown",
+    "Shut Down": "Shut Down",
     "Shutdown Complete": "Shutdown Complete",
     "Simple": "Simple",
     "Simple File Versioning": "Simple File Versioning",
@@ -387,6 +396,7 @@
     "Staggered": "Staggered",
     "Staggered File Versioning": "Staggered File Versioning",
     "Start Browser": "Start Browser",
+    "Starting": "Starting",
     "Statistics": "Statistics",
     "Stay logged in": "Stay logged in",
     "Stopped": "Stopped",