build: fix detection of next rc version

build: import release workflow changes from main
fix(protocol): slightly loosen/correct ownership comparison criteria (fixes #9879 ) (#10176 )
2025-06-20 11:17:23 +02:00 · 2025-06-20 11:12:05 +02:00 · 2025-06-20 09:55:42 +02:00 · 2025-06-15 10:29:33 +02:00
717 changed files with 70159 additions and 30108 deletions
@@ -1,28 +1,13 @@
 version: 2
 updates:
-
  - package-ecosystem: "github-actions"
    directory: "/"
    schedule:
      interval: monthly
-    cooldown:
-      default-days: 14
-    groups:
-      actions:
-        applies-to: version-updates
-        patterns:
-          - "*"
+    open-pull-requests-limit: 10

  - package-ecosystem: "gomod"
    directory: "/"
    schedule:
      interval: monthly
-    allow:
-      - dependency-type: direct
-    cooldown:
-      default-days: 14
-    groups:
-      dependencies:
-        applies-to: version-updates
-        patterns:
-          - "*"
+    open-pull-requests-limit: 10
@@ -1,52 +0,0 @@
-  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+
@@ -7,7 +7,7 @@ on:
      - infra-*

 env:
-  GO_VERSION: "~1.26.0"
+  GO_VERSION: "~1.24.0"
  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_owner == 'syncthing'
+    if: github.repository == 'syncthing/syncthing'
    runs-on: ubuntu-latest
+    environment: docker
    strategy:
-      fail-fast: false
      matrix:
        pkg:
          - stcrashreceiver
@@ -30,23 +30,23 @@ jobs:
          - stupgrades
          - ursrv
    steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

-      - uses: actions/setup-go@v6
+      - uses: actions/setup-go@v5
        with:
          go-version: ${{ env.GO_VERSION }}
          check-latest: true

      - name: Login to Docker Hub
-        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9 # v3
+        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Login to GHCR
-        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9 # v3
+        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
@@ -59,11 +59,8 @@ 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@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3
+        uses: docker/setup-buildx-action@v3

      - name: Set Docker tags (all branches)
        run: |
@@ -77,7 +74,7 @@ jobs:
          echo "TAGS=$tags" >> $GITHUB_ENV

      - name: Build and push
-        uses: docker/build-push-action@ca052bb54ab0790a636c9b5f226502c73d547a25 # v5
+        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./Dockerfile.${{ matrix.pkg }}
@@ -0,0 +1,18 @@
+name: Build Syncthing (Nightly)
+
+on:
+  schedule:
+    # Run nightly build at 05:00 UTC
+    - cron: '00 05 * * *'
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  packages: write
+
+jobs:
+  build-syncthing:
+    uses: ./.github/workflows/build-syncthing.yaml
+    # if we only want nightlies to run for specific users:
+    # if: contains(fromJSON('["syncthing", "calmh"]'), github.repository_owner)
+    secrets: inherit
@@ -1,21 +0,0 @@
-name: Mirrors
-
-on: [push, delete]
-
-permissions:
-  contents: read
-
-jobs:
-  codeberg:
-    name: Mirror to Codeberg
-    if: github.repository_owner == 'syncthing'
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-      - uses: yesolutions/mirror-action@662fce0eced8996f64d7fa264d76cddd84827f33 # master
-        with:
-          REMOTE: ssh://git@codeberg.org/${{ github.repository }}.git
-          GIT_SSH_PRIVATE_KEY: ${{ secrets.CODEBERG_PUSH_KEY }}
-          GIT_SSH_NO_VERIFY_HOST: "true"
@@ -1,21 +0,0 @@
-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 }}
@@ -0,0 +1,49 @@
+name: Run PR linters
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pull-requests: read
+
+jobs:
+
+  #
+  # golangci-lint runs a suite of static analysis checks on the code
+  #
+
+  golangci:
+    runs-on: ubuntu-latest
+    name: Golangci-lint
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: 'stable'
+
+      - name: ensure asset generation
+        run: go run build.go assets
+
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v8
+        with:
+          only-new-issues: true
+
+  #
+  # Meta checks for formatting, copyright, etc
+  #
+
+  meta:
+    name: Meta checks
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: 'stable'
+
+      - run: |
+          go run build.go assets
+          go test -v ./meta
@@ -20,9 +20,8 @@ jobs:

  labels:
    name: Set labels
-    if: github.repository_owner == 'syncthing'
    runs-on: ubuntu-latest
    steps:
-    - uses: srvaroa/labeler@9c29ad1ef33d169f9ef33c52722faf47a566bcf3 # v1
+    - uses: srvaroa/labeler@v1
      env:
        GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
@@ -12,16 +12,16 @@ permissions:
 jobs:
  create-release-tag:
    name: Create release tag
-    if: github.repository_owner == 'syncthing'
    runs-on: ubuntu-latest
+    environment: release
    steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ github.ref }} # https://github.com/actions/checkout/issues/882
          token: ${{ secrets.ACTIONS_GITHUB_TOKEN }}

-      - uses: actions/setup-go@v6
+      - uses: actions/setup-go@v5
        with:
          go-version: stable

@@ -53,7 +53,7 @@ jobs:
          git push origin "$NEXT"

      - name: Trigger the build
-        uses: benc-uk/workflow-dispatch@7a027648b88c2413826b6ddd6c76114894dc5ec4 # v1
+        uses: benc-uk/workflow-dispatch@v1
        with:
          workflow: build-syncthing.yaml
          ref: refs/tags/${{ env.NEXT }}
@@ -5,18 +5,14 @@ on:
    # Run nightly build at 01:00 UTC
    - cron: '00 01 * * *'

-permissions:
-  contents: write
-
 jobs:

  trigger-nightly:
-    name: Push to release-nightly to trigger build
-    if: github.repository_owner == 'syncthing'
    runs-on: ubuntu-latest
+    name: Push to release-nightly to trigger build
    steps:

-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
        with:
          token: ${{ secrets.ACTIONS_GITHUB_TOKEN }}
          fetch-depth: 0
@@ -4,20 +4,17 @@ 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@v5
+      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.ACTIONS_GITHUB_TOKEN }}
-      - uses: actions/setup-go@v6
+      - uses: actions/setup-go@v5
        with:
          go-version: stable
      - run: |
@@ -17,4 +17,5 @@ deb
 *.bz2
 /repos
 /proto/scripts/protoc-gen-gosyncthing
+/gui/next-gen-gui
 /compat.json
@@ -4,18 +4,15 @@ linters:
  disable:
    - cyclop
    - depguard
-    - err113
    - exhaustive
    - exhaustruct
    - forbidigo
-    - funcorder
    - funlen
    - gochecknoglobals
    - gochecknoinits
    - gocognit
    - goconst
    - gocyclo
-    - godot
    - godox
    - gomoddirectives
    - inamedparam
@@ -27,7 +24,6 @@ linters:
    - musttag
    - nestif
    - nlreturn
-    - noinlineerr
    - nonamedreturns
    - paralleltest
    - prealloc
@@ -43,7 +39,6 @@ linters:
    - whitespace
    - wrapcheck
    - wsl
-    - wsl_v5
  exclusions:
    generated: lax
    presets:
@@ -53,38 +48,11 @@ linters:
      - std-error-handling
    paths:
      - internal/gen
-      - internal/db/olddb
      - cmd/dev
      - repos
      - third_party$
      - 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
@@ -8,20 +8,17 @@
 policy:
  approval:
    - subject is conventional commit
-    - or:
-      - project metadata requires maintainer approval
-      - a maintainer claims responsibility
+    - project metadata requires maintainer approval
    - 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, maintainers can disapprove of a PR
+  # Additionally, contributors can disapprove of a PR
  disapproval:
    requires:
      teams:
-        - syncthing/maintainers
+        - syncthing/contributors

 # The rules for the policy are described below.

@@ -52,8 +49,7 @@ approval_rules:
        - syncthing/maintainers
    options:
      ignore_update_merges: true
-      allow_non_author_contributor: true
-      invalidate_on_push: true
+      allow_contributor: true

  # Regular pull requests require approval by an active contributor
  - name: is approved by a syncthing contributor
@@ -63,8 +59,7 @@ approval_rules:
        - syncthing/contributors
    options:
      ignore_update_merges: true
-      allow_non_author_contributor: true
-      invalidate_on_push: true
+      allow_contributor: true

  # Changes to some files (translations, dependencies, compatibility) do not
  # require approval if they were proposed by a contributor and have a
@@ -101,13 +96,3 @@ 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
@@ -13,121 +13,121 @@
 # contents of this file.
 #

-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>
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-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>
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 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 <1elias.bauer@gmail.com>
 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>
@@ -135,13 +135,13 @@ Felix Lampe <mail@flampe.de>
 Felix Unterpaintner (bigbear2nd) <bigbear2nd@gmail.com>
 Francois-Xavier Gsell (zukoo) <fxgsell@gmail.com>
 Frank Isemann (fti7) <frank@isemann.name>
-Frederic <1665799+Finomosec@users.noreply.github.com>
 Gahl Saraf <saraf.gahl@gmail.com> <gahl@raftt.io>
 georgespatton <georgespatton@users.noreply.github.com>
 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>
@@ -151,42 +151,55 @@ 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>
-Henrik Bråthen <henrikbs@proton.me>
 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>
@@ -195,24 +208,31 @@ 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>
-Luiz Angelo Daros de Luca <luizluca@gmail.com>
+luchenhan <168071714+luchenhan@users.noreply.github.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@marcusspencer.us>
 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>
@@ -220,16 +240,18 @@ Matic Potočnik <hairyfotr@gmail.com>
 Matt Burke (burkemw3) <mburke@amplify.com> <burkemw3@gmail.com>
 Matt Robenolt <matt@ydekproductions.com>
 Matteo Ruina <matteo.ruina@gmail.com>
-mattn <mattn.jp@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>
-Maxwell G <maxwell@gtmx.me>
+mclang <1721600+mclang@users.noreply.github.com>
 Michael Jephcote (Rewt0r) <rewt0r@gmx.com> <Rewt0r@users.noreply.github.com>
+Michael Ploujnikov (plouj) <ploujj@gmail.com>
 Michael Rienstra <mrienstra@gmail.com>
-Michael Wang 汪東陽 <michael19920327@gmail.com>
+Michael Tilli (pyfisch) <pyfisch@gmail.com>
 MichaIng <micha@dietpi.com>
 Migelo <miha@filetki.si>
 Mike Boone <mike@boonedocks.net>
@@ -238,6 +260,7 @@ 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>
@@ -252,6 +275,7 @@ 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>
@@ -259,6 +283,7 @@ 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>
@@ -268,19 +293,20 @@ 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>
-Prathik P Kulkarni <83969842+prathik8794@users.noreply.github.com>
+Pramodh KP (pramodhkp) <pramodh.p@directi.com> <1507241+pramodhkp@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>
-Rohit Tanwar <31792358+rohitanwar@users.noreply.github.com>
 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>
@@ -292,37 +318,39 @@ 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>
-Shablone <20610621+Shablone@users.noreply.github.com>
-Shivam Kumar <155747305+maishivamhoo123@users.noreply.github.com>
+Simon Frei (imsodin) <freisim93@gmail.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>
-tbodt <tbodt@tbodt.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>
@@ -330,16 +358,15 @@ 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@gmail.com>
+xjtdy888 (xjtdy888) <xjtdy888@163.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>
@@ -1,14 +1,25 @@
-## Reporting Bugs & Feature Requests
+## Reporting Bugs

-For general discussion and troubleshooting, please use the [Support
-Forum](https://forum.syncthing.net/). For actionable bug reports and feature
-requests, please file issues in the [GitHub Issue
-Tracker](https://github.com/syncthing/syncthing/issues), using one of the
-provided templates.
+Please file bugs in the [GitHub Issue
+Tracker](https://github.com/syncthing/syncthing/issues). Include at
+least the following:

-:warning: Do not submit AI generated issues or comments. Report any details
-you experienced as a human, and let anyone who wants to perform AI analysis
-do so on their own.
+ - What happened
+
+ - What did you expect to happen instead of what *did* happen, if it's
+   not crazy obvious
+
+ - What operating system, operating system version and version of
+   Syncthing you are running
+
+ - The same for other connected devices, where relevant
+
+ - Screenshot if the issue concerns something visible in the GUI
+
+ - Console log entries, where possible and relevant
+
+If you're not sure whether something is relevant, erring on the side of
+too much information will never get you yelled at. :)

 ## Contributing Translations

@@ -23,160 +34,19 @@ 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
-
-We welcome contributions. However:
-
-:warning: We do not accept contributions that are wholly or mostly AI
-generated. You may assume that we are fully capable of prompting an AI
-ourselves when so inclined.
-
-:warning: We do not accept unsolicited pull requests from new contributors.
-Most such contributions fall afoul of the previous rule. If yours does not,
-please post a message to the relevant issue with a link to your branch and a
-short description of the reasoning behind it. We'll take care of onboarding
-you.
-
-### 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
@@ -189,5 +59,10 @@ 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.
+
@@ -23,7 +23,52 @@ example `UMASK=002`.
 **Docker cli**
 ```
 $ docker pull syncthing/syncthing
-$ docker run --network=host  -e STGUIADDRESS= \
+$ 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 \
    -v /wherever/st-sync:/var/syncthing \
    syncthing/syncthing:latest
 ```
@@ -40,7 +85,6 @@ services:
    environment:
      - PUID=1000
      - PGID=1000
-      - STGUIADDRESS=
    volumes:
      - /wherever/st-sync:/var/syncthing
    network_mode: host
@@ -52,27 +96,27 @@ 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`. 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.
+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.
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
-  <application>
-    <windowsSettings>
-      <consoleAllocationPolicy xmlns="http://schemas.microsoft.com/SMI/2024/WindowsSettings">detached</consoleAllocationPolicy>
-    </windowsSettings>
-  </application>
-</assembly>
@@ -38,26 +38,27 @@ import (
 )

 var (
-	goarch        string
-	goos          string
-	noupgrade     bool
-	version       string
-	goCmd         string
-	race          bool
-	debug         = os.Getenv("BUILDDEBUG") != ""
-	extraTags     string
-	installSuffix string
-	pkgdir        string
-	cc            string
-	run           string
-	benchRun      string
-	buildOut      string
-	debugBinary   bool
-	coverage      bool
-	long          bool
-	timeout       = "120s"
-	longTimeout   = "600s"
-	numVersions   = 5
+	goarch         string
+	goos           string
+	noupgrade      bool
+	version        string
+	goCmd          string
+	race           bool
+	debug          = os.Getenv("BUILDDEBUG") != ""
+	extraTags      string
+	installSuffix  string
+	pkgdir         string
+	cc             string
+	run            string
+	benchRun       string
+	buildOut       string
+	debugBinary    bool
+	coverage       bool
+	long           bool
+	timeout        = "120s"
+	longTimeout    = "600s"
+	numVersions    = 5
+	withNextGenGUI = os.Getenv("BUILD_NEXT_GEN_GUI") != ""
 )

 type target struct {
@@ -288,10 +289,10 @@ func runCommand(cmd string, target target) {
 		build(target, tags)

 	case "test":
-		test(strings.Fields(extraTags), "github.com/syncthing/syncthing/internal/...", "github.com/syncthing/syncthing/lib/...", "github.com/syncthing/syncthing/cmd/...")
+		test(strings.Fields(extraTags), "github.com/syncthing/syncthing/lib/...", "github.com/syncthing/syncthing/cmd/...")

 	case "bench":
-		bench(strings.Fields(extraTags), "github.com/syncthing/syncthing/internal/...", "github.com/syncthing/syncthing/lib/...", "github.com/syncthing/syncthing/cmd/...")
+		bench(strings.Fields(extraTags), "github.com/syncthing/syncthing/lib/...", "github.com/syncthing/syncthing/cmd/...")

 	case "integration":
 		integration(false)
@@ -379,6 +380,7 @@ func parseFlags() {
 	flag.IntVar(&numVersions, "num-versions", numVersions, "Number of versions for changelog command")
 	flag.StringVar(&run, "run", "", "Specify which tests to run")
 	flag.StringVar(&benchRun, "bench", "", "Specify which benchmarks to run")
+	flag.BoolVar(&withNextGenGUI, "with-next-gen-gui", withNextGenGUI, "Also build 'newgui'")
 	flag.StringVar(&buildOut, "build-out", "", "Set the '-o' value for 'go build'")
 	flag.Parse()
 }
@@ -451,6 +453,10 @@ func benchArgs() []string {
 }

 func install(target target, tags []string) {
+	if (target.name == "syncthing" || target.name == "") && !withNextGenGUI {
+		log.Println("Notice: Next generation GUI will not be built; see --with-next-gen-gui.")
+	}
+
 	lazyRebuildAssets()

 	tags = append(target.tags, tags...)
@@ -474,12 +480,16 @@ func install(target target, tags []string) {
 		defer shouldCleanupSyso(sysoPath)
 	}

-	args := []string{"install"}
+	args := []string{"install", "-v"}
 	args = appendParameters(args, tags, target.buildPkgs...)
 	runPrint(goCmd, args...)
 }

 func build(target target, tags []string) {
+	if (target.name == "syncthing" || target.name == "") && !withNextGenGUI {
+		log.Println("Notice: Next generation GUI will not be built; see --with-next-gen-gui.")
+	}
+
 	lazyRebuildAssets()
 	tags = append(target.tags, tags...)

@@ -502,7 +512,7 @@ func build(target target, tags []string) {
 		defer shouldCleanupSyso(sysoPath)
 	}

-	args := []string{"build"}
+	args := []string{"build", "-v"}
 	if buildOut != "" {
 		args = append(args, "-o", buildOut)
 	}
@@ -514,6 +524,13 @@ func setBuildEnvVars() {
 	os.Setenv("GOOS", goos)
 	os.Setenv("GOARCH", goarch)
 	os.Setenv("CC", cc)
+	if os.Getenv("CGO_ENABLED") == "" {
+		switch goos {
+		case "darwin", "solaris":
+		default:
+			os.Setenv("CGO_ENABLED", "0")
+		}
+	}
 }

 func appendParameters(args []string, tags []string, pkgs ...string) []string {
@@ -718,7 +735,7 @@ func shouldBuildSyso(dir string) (string, error) {
 	}

 	jsonPath := filepath.Join(dir, "versioninfo.json")
-	err = os.WriteFile(jsonPath, bs, 0o666)
+	err = os.WriteFile(jsonPath, bs, 0o644)
 	if err != nil {
 		return "", errors.New("failed to create " + jsonPath + ": " + err.Error())
 	}
@@ -732,18 +749,12 @@ func shouldBuildSyso(dir string) (string, error) {
 	sysoPath := filepath.Join(dir, "cmd", "syncthing", "resource.syso")

 	// See https://github.com/josephspurrier/goversioninfo#command-line-flags
-	// For manifest see https://learn.microsoft.com/en-us/windows/console/console-allocation-policy
-	isARM := strings.HasPrefix(goarch, "arm")
-	is64Bit := strings.Contains(goarch, "64")
-
-	args := []string{
-		"-manifest=assets/windows/syncthing.exe.manifest", // console-allocation-policy
-		"-o", sysoPath, // output path
-		fmt.Sprintf("-arm=%v", isARM),
-		fmt.Sprintf("-64=%v", is64Bit),
+	armOption := ""
+	if strings.Contains(goarch, "arm") {
+		armOption = "-arm=true"
 	}

-	if _, err := runError("goversioninfo", args...); err != nil {
+	if _, err := runError("goversioninfo", "-o", sysoPath, armOption); err != nil {
 		return "", errors.New("failed to create " + sysoPath + ": " + err.Error())
 	}

@@ -783,7 +794,7 @@ func copyFile(src, dst string, perm os.FileMode) error {
 	}

 copy:
-	os.MkdirAll(filepath.Dir(dst), os.ModePerm)
+	os.MkdirAll(filepath.Dir(dst), 0o777)
 	if err := os.WriteFile(dst, in, perm); err != nil {
 		return err
 	}
@@ -815,11 +826,43 @@ func lazyRebuildAssets() {
 	shouldRebuild := shouldRebuildAssets("lib/api/auto/gui.files.go", "gui") ||
 		shouldRebuildAssets("cmd/infra/strelaypoolsrv/auto/gui.files.go", "cmd/infra/strelaypoolsrv/gui")

+	if withNextGenGUI {
+		shouldRebuild = buildNextGenGUI() || shouldRebuild
+	}
+
 	if shouldRebuild {
 		rebuildAssets()
 	}
 }

+func buildNextGenGUI() bool {
+	// Check if we need to run the npm process, and if so also set the flag
+	// to rebuild Go assets afterwards. The index.html is regenerated every
+	// time by the build process. This assumes the new GUI ends up in
+	// next-gen-gui/dist/next-gen-gui.
+
+	if !shouldRebuildAssets("gui/next-gen-gui/index.html", "next-gen-gui") {
+		// The GUI is up to date.
+		return false
+	}
+
+	runPrintInDir("next-gen-gui", "npm", "install")
+	runPrintInDir("next-gen-gui", "npm", "run", "build", "--", "--prod", "--subresource-integrity")
+
+	rmr("gui/tech-ui")
+
+	for _, src := range listFiles("next-gen-gui/dist") {
+		rel, _ := filepath.Rel("next-gen-gui/dist", src)
+		dst := filepath.Join("gui", rel)
+		if err := copyFile(src, dst, 0o644); err != nil {
+			fmt.Println("copy:", err)
+			os.Exit(1)
+		}
+	}
+
+	return true
+}
+
 func shouldRebuildAssets(target, srcdir string) bool {
 	info, err := os.Stat(target)
 	if err != nil {
@@ -879,6 +922,7 @@ 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",
 	}
@@ -909,7 +953,6 @@ 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())
@@ -931,9 +974,6 @@ 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
@@ -978,7 +1018,7 @@ func getGitVersion() (string, error) {
 }

 func getVersion() string {
-	// First try for a RELEASE file or $VERSION env var,
+	// First try for a RELEASE file,
 	if ver, err := getReleaseVersion(); err == nil {
 		return ver
 	}
@@ -1432,7 +1472,7 @@ func writeCompatJSON() {
 			continue
 		}
 		bs, _ := json.MarshalIndent(e, "", "  ")
-		if err := os.WriteFile("compat.json", bs, 0o666); err != nil {
+		if err := os.WriteFile("compat.json", bs, 0o644); err != nil {
 			log.Fatal("Writing compat.json:", err)
 		}
 		return
@@ -15,6 +15,8 @@ import (
 	"log"
 	"os"
 	"path/filepath"
+
+	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 )

 func main() {
@@ -18,6 +18,7 @@ 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"
@@ -14,13 +14,15 @@ import (
 	"net/http"
 	"os"
 	"time"
+
+	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 )

 type event struct {
-	ID   int            `json:"id"`
-	Type string         `json:"type"`
-	Time time.Time      `json:"time"`
-	Data map[string]any `json:"data"`
+	ID   int                    `json:"id"`
+	Type string                 `json:"type"`
+	Time time.Time              `json:"time"`
+	Data map[string]interface{} `json:"data"`
 }

 func main() {
@@ -13,6 +13,7 @@ import (
 	"os"
 	"path/filepath"

+	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/scanner"
 )
@@ -71,7 +72,7 @@ func main() {
 		if *standardBlocks || blockSize < protocol.MinBlockSize {
 			blockSize = protocol.BlockSize(fi.Size())
 		}
-		bs, err := scanner.Blocks(context.TODO(), fd, blockSize, fi.Size(), nil)
+		bs, err := scanner.Blocks(context.TODO(), fd, blockSize, fi.Size(), nil, true)
 		if err != nil {
 			log.Fatal(err)
 		}
@@ -16,6 +16,7 @@ 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"
@@ -60,6 +61,7 @@ func checkServers(deviceID protocol.DeviceID, servers ...string) {
 	t0 := time.Now()
 	resc := make(chan checkResult)
 	for _, srv := range servers {
+		srv := srv
 		go func() {
 			res := checkServer(deviceID, srv)
 			res.server = srv
@@ -12,6 +12,7 @@ import (
 	"fmt"
 	"os"

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

 func main() {
@@ -34,7 +36,7 @@ func generateFiles(dir string, files, maxexp int, srcname string) error {
 		return err
 	}

-	for range files {
+	for i := 0; i < files; i++ {
 		n := randomName()

 		if rand.Float64() < 0.05 {
@@ -51,7 +53,10 @@ func generateFiles(dir string, files, maxexp int, srcname string) error {
 		p1 := filepath.Join(p0, n)

 		s := int64(1 << uint(rand.Intn(maxexp)))
-		a := min(int64(128*1024), s)
+		a := int64(128 * 1024)
+		if a > s {
+			a = s
+		}
 		s += rand.Int63n(a)

 		if err := generateOneFile(fd, p1, s); err != nil {
@@ -12,6 +12,7 @@ import (
 	"log"
 	"os"

+	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/signature"
 	"github.com/syncthing/syncthing/lib/upgrade"
 )
@@ -26,6 +26,7 @@ import (
 	"sync/atomic"
 	"time"

+	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/protocol"
 )

@@ -52,9 +53,11 @@ func main() {
 	// Run one certificate generator per CPU core.
 	var wg sync.WaitGroup
 	for i := 0; i < runtime.GOMAXPROCS(-1); i++ {
-		wg.Go(func() {
+		wg.Add(1)
+		go func() {
 			generatePrefixed(prefix, &count, found, stop)
-		})
+			wg.Done()
+		}()
 	}

 	// Save the result, when one has been found.
@@ -138,7 +141,7 @@ func printProgress(prefix string, count *atomic.Int64) {
 	}
 }

-func saveCert(priv any, derBytes []byte) {
+func saveCert(priv interface{}, derBytes []byte) {
 	certOut, err := os.Create("cert.pem")
 	if err != nil {
 		fmt.Println(err)
@@ -179,7 +182,7 @@ func saveCert(priv any, derBytes []byte) {
 	}
 }

-func pemBlockForKey(priv any) (*pem.Block, error) {
+func pemBlockForKey(priv interface{}) (*pem.Block, error) {
 	switch k := priv.(type) {
 	case *rsa.PrivateKey:
 		return &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(k)}, nil
@@ -13,6 +13,8 @@ import (
 	"io"
 	"os"
 	"time"
+
+	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 )

 func main() {
@@ -1,76 +0,0 @@
-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
-
@@ -42,7 +42,7 @@ type currentFile struct {
 }

 func (d *diskStore) Serve(ctx context.Context) {
-	if err := os.MkdirAll(d.dir, os.ModePerm); err != nil {
+	if err := os.MkdirAll(d.dir, 0o700); err != nil {
 		log.Println("Creating directory:", err)
 		return
 	}
@@ -62,7 +62,7 @@ func (d *diskStore) Serve(ctx context.Context) {
 		case entry := <-d.inbox:
 			path := d.fullPath(entry.path)

-			if err := os.MkdirAll(filepath.Dir(path), os.ModePerm); err != nil {
+			if err := os.MkdirAll(filepath.Dir(path), 0o700); err != nil {
 				log.Println("Creating directory:", err)
 				continue
 			}
@@ -77,7 +77,7 @@ func (d *diskStore) Serve(ctx context.Context) {
 				log.Println("Failed to compress crash report:", err)
 				continue
 			}
-			if err := os.WriteFile(path, buf.Bytes(), 0o666); err != nil {
+			if err := os.WriteFile(path, buf.Bytes(), 0o600); err != nil {
 				log.Printf("Failed to write %s: %v", entry.path, err)
 				_ = os.Remove(path)
 				continue
@@ -136,25 +136,15 @@ func (d *diskStore) Exists(path string) bool {
 }

 func (d *diskStore) clean() {
-	numDeleted := 0
-	for idx := range d.currentFiles {
-		if len(d.currentFiles)-numDeleted < d.maxFiles && d.currentSize < d.maxBytes {
-			break
-		}
-
-		f := d.currentFiles[idx]
+	for len(d.currentFiles) > 0 && (len(d.currentFiles) > d.maxFiles || d.currentSize > d.maxBytes) {
+		f := d.currentFiles[0]
 		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)
@@ -168,7 +158,7 @@ func (d *diskStore) clean() {
 }

 func (d *diskStore) inventory() error {
-	d.currentFiles = d.currentFiles[:0]
+	d.currentFiles = nil
 	d.currentSize = 0
 	err := filepath.Walk(d.dir, func(path string, info os.FileInfo, err error) error {
 		if err != nil {
@@ -20,7 +20,6 @@ import (
 	"io"
 	"log"
 	"net/http"
-	"net/http/pprof"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -29,8 +28,9 @@ 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/contract"
+	"github.com/syncthing/syncthing/lib/ur"
 )

 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"`
-	IgnorePatterns string `help:"File containing ignore patterns (regexp)" env:"IGNORE_PATTERNS" type:"existingfile"`
+	IngorePatterns 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.IgnorePatterns != "" {
+	if params.IngorePatterns != "" {
 		var err error
-		ip, err = loadIgnorePatterns(params.IgnorePatterns)
+		ip, err = loadIgnorePatterns(params.IngorePatterns)
 		if err != nil {
 			log.Fatalf("Failed to load ignore patterns: %v", err)
 		}
@@ -90,7 +90,6 @@ 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)
@@ -103,8 +102,6 @@ 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)
 	}
@@ -121,20 +118,19 @@ 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(), http.StatusInternalServerError)
+			http.Error(w, err.Error(), 500)
 			return
 		}

-		if pat, ok := ignore.match(bs); ok {
-			metricIgnoreMatchesTotal.WithLabelValues(pat).Inc()
+		if ignore.match(bs) {
 			result = "ignored"
 			return
 		}

-		var reports []contract.FailureReport
+		var reports []ur.FailureReport
 		err = json.Unmarshal(bs, &reports)
 		if err != nil {
-			http.Error(w, err.Error(), http.StatusBadRequest)
+			http.Error(w, err.Error(), 400)
 			return
 		}
 		if len(reports) == 0 {
@@ -145,7 +141,7 @@ 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(), http.StatusBadRequest)
+			http.Error(w, err.Error(), 400)
 			return
 		}
 		for _, r := range reports {
@@ -179,7 +175,7 @@ func handleFailureFn(dsn, failureDir string, ignore *ignorePatterns) func(w http
 	}
 }

-func saveFailureWithGoroutines(data contract.FailureData, failureDir string) (string, error) {
+func saveFailureWithGoroutines(data ur.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)
@@ -203,7 +199,7 @@ func loadIgnorePatterns(path string) (*ignorePatterns, error) {
 	}

 	var patterns []*regexp.Regexp
-	for line := range strings.SplitSeq(string(bs), "\n") {
+	for _, line := range strings.Split(string(bs), "\n") {
 		line = strings.TrimSpace(line)
 		if line == "" {
 			continue
@@ -219,14 +215,14 @@ func loadIgnorePatterns(path string) (*ignorePatterns, error) {
 	return &ignorePatterns{patterns: patterns}, nil
 }

-func (i *ignorePatterns) match(report []byte) (string, bool) {
+func (i *ignorePatterns) match(report []byte) bool {
 	if i == nil {
-		return "", false
+		return false
 	}
 	for _, re := range i.patterns {
 		if re.Match(report) {
-			return re.String(), true
+			return true
 		}
 	}
-	return "", false
+	return false
 }
@@ -37,24 +37,4 @@ 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",
-	})
 )
@@ -10,7 +10,6 @@ import (
 	"bytes"
 	"context"
 	"errors"
-	"fmt"
 	"io"
 	"log"
 	"regexp"
@@ -53,15 +52,11 @@ 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
@@ -74,7 +69,6 @@ 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
 	}
 }
@@ -96,7 +90,7 @@ 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 the packet we give
+	// misguided idea that it knows this better than 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)
@@ -114,10 +108,11 @@ func parseCrashReport(path string, report []byte) (*raven.Packet, error) {

 	version, err := build.ParseVersion(string(parts[0]))
 	if err != nil {
-		return nil, fmt.Errorf("%w in %q", err, parts[0])
+		return nil, err
 	}
 	report = parts[1]

+	foundPanic := false
 	var subjectLine []byte
 	for {
 		parts = bytes.SplitN(report, []byte("\n"), 2)
@@ -128,15 +123,20 @@ func parseCrashReport(path string, report []byte) (*raven.Packet, error) {
 		line := parts[0]
 		report = parts[1]

-		if bytes.HasPrefix(line, []byte("panic:")) || bytes.HasPrefix(line, []byte("fatal error:")) {
+		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.
 			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 && !errors.Is(err, io.EOF) {
+	if err != nil && err != io.EOF {
 		return nil, err
 	}
 	if ctx == nil || len(ctx.Goroutines) == 0 {
@@ -9,33 +9,26 @@ package main
 import (
 	"fmt"
 	"os"
-	"path/filepath"
 	"testing"
 )

 func TestParseReport(t *testing.T) {
-	files, err := filepath.Glob("_testdata/*.log")
+	bs, err := os.ReadFile("_testdata/panic.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)
-		}
-
-		bs, err = pkt.JSON()
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		fmt.Printf("%s\n", bs)
+	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)
 }

 func TestCrashReportFingerprint(t *testing.T) {
@@ -15,33 +15,23 @@ import (
 	"strings"
 	"sync"
 	"time"
-
-	lru "github.com/hashicorp/golang-lru/v2"
 )

 const (
-	urlPrefix       = "https://raw.githubusercontent.com/syncthing/syncthing/"
-	httpTimeout     = 10 * time.Second
-	maxCacheEntries = 1000
+	urlPrefix   = "https://raw.githubusercontent.com/syncthing/syncthing/"
+	httpTimeout = 10 * time.Second
 )

-type cacheKey struct {
-	version string
-	file    string
-}
-
 type githubSourceCodeLoader struct {
 	mut     sync.Mutex
 	version string
-
-	cache  *lru.TwoQueueCache[cacheKey, [][]byte] // version & file -> lines
-	client *http.Client
+	cache   map[string]map[string][][]byte // version -> file -> lines
+	client  *http.Client
 }

 func newGithubSourceCodeLoader() *githubSourceCodeLoader {
-	cache, _ := lru.New2Q[cacheKey, [][]byte](maxCacheEntries)
 	return &githubSourceCodeLoader{
-		cache:  cache,
+		cache:  make(map[string]map[string][][]byte),
 		client: &http.Client{Timeout: httpTimeout},
 	}
 }
@@ -49,6 +39,9 @@ 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() {
@@ -57,16 +50,14 @@ func (l *githubSourceCodeLoader) Unlock() {

 func (l *githubSourceCodeLoader) Load(filename string, line, context int) ([][]byte, int) {
 	filename = filepath.ToSlash(filename)
-	key := cacheKey{version: l.version, file: filename}
-	lines, ok := l.cache.Get(key)
+	lines, ok := l.cache[l.version][filename]
 	if !ok {
 		// Cache whatever we managed to find (or nil if nothing, so we don't try again)
 		defer func() {
-			l.cache.Add(key, lines)
-			metricSourceCodeCacheSize.Set(float64(l.cache.Len()))
+			l.cache[l.version][filename] = lines
 		}()

-		knownPrefixes := []string{"/internal/", "/lib/", "/cmd/"}
+		knownPrefixes := []string{"/lib/", "/cmd/"}
 		var idx int
 		for _, pref := range knownPrefixes {
 			idx = strings.Index(filename, pref)
@@ -82,25 +73,19 @@ 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
 		}
-		defer resp.Body.Close()
 		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)
@@ -7,18 +7,21 @@
 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) {
@@ -66,6 +69,12 @@ 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)
 	}
@@ -78,7 +87,17 @@ 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 {
@@ -87,12 +106,14 @@ func (r *crashReceiver) servePut(reportID string, w http.ResponseWriter, req *ht
 		return
 	}

-	first := string(bytes.TrimSpace(bytes.Split(bs, []byte("\n"))[0]))
-
-	if pat, ok := r.ignore.match(bs); ok {
-		metricIgnoreMatchesTotal.WithLabelValues(pat).Inc()
+	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()
 		result = "ignored"
-		log.Printf("Ignored report %s, matched: %s (%s)", reportID[:8], pat, first)
 		return
 	}

@@ -100,15 +121,13 @@ 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[:8])
+		log.Println("Failed to store report (queue full):", reportID)
 		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[:8])
+		log.Println("Failed to send report to sentry (queue full):", reportID)
 		result = "sentry_failure"
 	}
-
-	log.Printf("Received report %s (%s)", reportID[:8], first)
 }
@@ -10,7 +10,7 @@ import (
 	"bytes"
 	"compress/gzip"
 	"crypto/sha256"
-	"encoding/hex"
+	"fmt"
 	"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 hex.EncodeToString(hash[:8])
+	return fmt.Sprintf("%x", hash[:8])
 }

 // 01234567890abcdef... => 01/23
@@ -52,5 +52,5 @@ func compressAndWrite(bs []byte, fullPath string) error {
 	gw.Close()

 	// Create an output file with the compressed report
-	return os.WriteFile(fullPath, buf.Bytes(), 0o666)
+	return os.WriteFile(fullPath, buf.Bytes(), 0o644)
 }
@@ -5,6 +5,7 @@
 // You can obtain one at https://mozilla.org/MPL/2.0/.

 //go:build noassets
+// +build noassets

 package auto

@@ -193,7 +193,7 @@
    </div>


-    <script type="text/javascript" src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
+    <script type="text/javascript" src="https://code.jquery.com/jquery-2.1.4.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>
@@ -3,7 +3,6 @@
 package main

 import (
-	"bytes"
 	"context"
 	"crypto/tls"
 	"crypto/x509"
@@ -18,7 +17,6 @@ import (
 	"path/filepath"
 	"strconv"
 	"strings"
-	"sync"
 	"sync/atomic"
 	"time"

@@ -28,12 +26,12 @@ import (

 	"github.com/syncthing/syncthing/cmd/infra/strelaypoolsrv/auto"
 	"github.com/syncthing/syncthing/lib/assets"
-	"github.com/syncthing/syncthing/lib/build"
+	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/geoip"
-	"github.com/syncthing/syncthing/lib/osutil"
 	"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"
 )

@@ -117,7 +115,7 @@ var (

 	requests chan request

-	mut             sync.RWMutex
+	mut             = sync.NewRWMutex()
 	knownRelays     = make([]*relay, 0)
 	permanentRelays = make([]*relay, 0)
 	evictionTimers  = make(map[string]*time.Timer)
@@ -149,8 +147,6 @@ func main() {

 	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 {
@@ -166,7 +162,7 @@ func main() {

 	testCert = createTestCertificate()

-	for range requestProcessors {
+	for i := 0; i < requestProcessors; i++ {
 		go requestProcessor(geoip)
 	}

@@ -184,7 +180,7 @@ func main() {
 				relayTestsTotal.WithLabelValues("success").Inc()
 			}
 		}
-		// Run the stats refresher once the relays are loaded.
+		// Run the the stats refresher once the relays are loaded.
 		statsRefresher(statsRefresh)
 	}()

@@ -320,12 +316,11 @@ func handleEndpointFull(rw http.ResponseWriter, r *http.Request) {
 	relays := make([]*relay, len(permanentRelays)+len(knownRelays))
 	n := copy(relays, permanentRelays)
 	copy(relays[n:], knownRelays)
-	bs, _ := json.Marshal(map[string][]*relay{
-		"relays": relays,
-	})
 	mut.RUnlock()

-	_, _ = rw.Write(bs)
+	_ = json.NewEncoder(rw).Encode(map[string][]*relay{
+		"relays": relays,
+	})
 }

 // handleEndpointShort returns the relay list with only the URL.
@@ -335,10 +330,7 @@ func handleEndpointShort(rw http.ResponseWriter, r *http.Request) {

 	mut.RLock()
 	relays := make([]relayShort, 0, len(permanentRelays)+len(knownRelays))
-	for _, r := range permanentRelays {
-		relays = append(relays, relayShort{URL: slimURL(r.URL)})
-	}
-	for _, r := range knownRelays {
+	for _, r := range append(permanentRelays, knownRelays...) {
 		relays = append(relays, relayShort{URL: slimURL(r.URL)})
 	}
 	mut.RUnlock()
@@ -434,7 +426,7 @@ 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", rhost, uri)
+			log.Println("IP address advertised does not match client IP address", r.RemoteAddr, uri)
 		}
 		http.Error(w, fmt.Sprintf("IP advertised %s does not match client IP %s", host, rhost), http.StatusUnauthorized)
 		return
@@ -458,13 +450,13 @@ 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", rhost, "failed:", result.err)
+			log.Println("Join from", r.RemoteAddr, "failed:", result.err)
 			globalBlocklist.AddError(rhost)
 			relayTestsTotal.WithLabelValues("failed").Inc()
 			http.Error(w, result.err.Error(), http.StatusBadRequest)
 			return
 		}
-		log.Println("Join from", rhost, "succeeded")
+		log.Println("Join from", r.RemoteAddr, "succeeded")
 		globalBlocklist.ClearErrors(rhost)
 		relayTestsTotal.WithLabelValues("success").Inc()
 		w.Header().Set("Content-Type", "application/json; charset=utf-8")
@@ -550,7 +542,7 @@ found:

 	mut.Unlock()

-	if err := saveKnownRelays(knownRelaysFile); err != nil {
+	if err := saveRelays(knownRelaysFile, knownRelays); err != nil {
 		log.Println("Failed to write known relays: " + err.Error())
 	}

@@ -587,7 +579,7 @@ func loadRelays(file string, geoip *geoip.Provider) []*relay {
 	}

 	var relays []*relay
-	for line := range strings.SplitSeq(string(content), "\n") {
+	for _, line := range strings.Split(string(content), "\n") {
 		if line == "" {
 			continue
 		}
@@ -613,22 +605,12 @@ func loadRelays(file string, geoip *geoip.Provider) []*relay {
 	return relays
 }

-func saveKnownRelays(file string) error {
-	var buf bytes.Buffer
-	mut.RLock()
-	for _, relay := range knownRelays {
-		fmt.Fprintln(&buf, relay.uri.String())
+func saveRelays(file string, relays []*relay) error {
+	var content string
+	for _, relay := range relays {
+		content += relay.uri.String() + "\n"
 	}
-	mut.RUnlock()
-
-	fd, err := osutil.CreateAtomic(file)
-	if err != nil {
-		return err
-	}
-	if _, err := fd.Write(buf.Bytes()); err != nil {
-		return err
-	}
-	return fd.Close()
+	return os.WriteFile(file, []byte(content), 0o777)
 }

 func createTestCertificate() tls.Certificate {
@@ -638,7 +620,7 @@ 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, false)
+	cert, err := tlsutil.NewCertificate(certFile, keyFile, "relaypoolsrv", 20*365)
 	if err != nil {
 		log.Fatalln("Failed to create test X509 key pair:", err)
 	}
@@ -671,7 +653,6 @@ func getLocation(host string, geoip *geoip.Provider) location {

 type loggingResponseWriter struct {
 	http.ResponseWriter
-
 	statusCode int
 }

@@ -13,11 +13,12 @@ import (
 	"net/http/httptest"
 	"net/url"
 	"strings"
+	"sync"
 	"testing"
 )

 func init() {
-	for i := range 10 {
+	for i := 0; i < 10; i++ {
 		u := fmt.Sprintf("permanent%d", i)
 		permanentRelays = append(permanentRelays, &relay{URL: u})
 	}
@@ -27,6 +28,8 @@ func init() {
 		{URL: "known2"},
 		{URL: "known3"},
 	}
+
+	mut = new(sync.RWMutex)
 }

 // Regression test: handleGetRequest should not modify permanentRelays.
@@ -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 (
@@ -104,11 +104,12 @@ func refreshStats() {
 	mut.RUnlock()

 	now := time.Now()
-	var wg sync.WaitGroup
+	wg := sync.NewWaitGroup()

 	results := make(chan statsFetchResult, len(relays))
 	for _, rel := range relays {
-		wg.Go(func() {
+		wg.Add(1)
+		go func(rel *relay) {
 			t0 := time.Now()
 			stats := fetchStats(rel)
 			duration := time.Since(t0).Seconds()
@@ -122,7 +123,8 @@ func refreshStats() {
 				relay: rel,
 				stats: fetchStats(rel),
 			}
-		})
+			wg.Done()
+		}(rel)
 	}

 	wg.Wait()
@@ -171,7 +173,7 @@ func fetchStats(relay *relay) *stats {

 	var stats stats

-	if err := json.NewDecoder(response.Body).Decode(&stats); err != nil {
+	if json.NewDecoder(response.Body).Decode(&stats); err != nil {
 		return nil
 	}
 	return &stats
@@ -24,8 +24,7 @@ import (

 	"github.com/alecthomas/kong"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
-	"github.com/syncthing/syncthing/internal/slogutil"
-	"github.com/syncthing/syncthing/lib/build"
+	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/httpcache"
 	"github.com/syncthing/syncthing/lib/upgrade"
 )
@@ -45,8 +44,6 @@ 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)
@@ -61,10 +58,10 @@ func server(params *cli) error {
 		if err != nil {
 			return fmt.Errorf("metrics: %w", err)
 		}
-		slog.Info("Metrics listener started", slogutil.Address(params.MetricsListen))
+		slog.Info("Metrics listener started", "addr", params.MetricsListen)
 		go func() {
 			if err := http.Serve(metricsListen, mux); err != nil {
-				slog.Warn("Metrics server returned", slogutil.Error(err))
+				slog.Warn("Metrics server returned", "error", err)
 			}
 		}()
 	}
@@ -78,9 +75,9 @@ func server(params *cli) error {

 	go func() {
 		for range time.NewTicker(params.CacheTime).C {
-			slog.Info("Refreshing cached releases", slogutil.URI(params.URL))
+			slog.Info("Refreshing cached releases", "url", params.URL)
 			if err := cache.Update(context.Background()); err != nil {
-				slog.Error("Failed to refresh cached releases", slogutil.URI(params.URL), slogutil.Error(err))
+				slog.Error("Failed to refresh cached releases", "url", params.URL, "error", err)
 			}
 		}
 	}()
@@ -112,7 +109,7 @@ func server(params *cli) error {
 	if err != nil {
 		return fmt.Errorf("listen: %w", err)
 	}
-	slog.Info("Main listener started", slogutil.Address(params.Listen))
+	slog.Info("Main listener started", "addr", params.Listen)

 	return srv.Serve(srvListener)
 }
@@ -140,7 +137,7 @@ 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 = filterForCompatibility(rels, ua, osv)
+		rels = filterForCompabitility(rels, ua, osv)
 	} else {
 		metricFilterCalls.WithLabelValues("no-ua-or-osversion").Inc()
 	}
@@ -188,7 +185,7 @@ func (p *proxy) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	w.WriteHeader(resp.StatusCode)
 	if strings.HasPrefix(ct, "application/json") {
 		// Special JSON handling; clean it up a bit.
-		var v any
+		var v interface{}
 		if err := json.NewDecoder(resp.Body).Decode(&v); err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
@@ -226,7 +223,7 @@ func filterForLatest(rels []upgrade.Release) []upgrade.Release {

 var userAgentOSArchExp = regexp.MustCompile(`^syncthing.*\(.+ (\w+)-(\w+)\)$`)

-func filterForCompatibility(rels []upgrade.Release, ua, osv string) []upgrade.Release {
+func filterForCompabitility(rels []upgrade.Release, ua, osv string) []upgrade.Release {
 	osArch := userAgentOSArchExp.FindStringSubmatch(ua)
 	if len(osArch) != 3 {
 		metricFilterCalls.WithLabelValues("bad-os-arch").Inc()
@@ -13,7 +13,7 @@ import (

 	"github.com/alecthomas/kong"
 	"github.com/syncthing/syncthing/cmd/infra/ursrv/serve"
-	"github.com/syncthing/syncthing/lib/build"
+	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 )

 type CLI struct {
@@ -25,8 +25,6 @@ func main() {
 		Level: slog.LevelInfo,
 	})))

-	slog.Info(build.LongVersionFor("ursrv"))
-
 	var cli CLI
 	ctx := kong.Parse(&cli)
 	if err := ctx.Run(); err != nil {
@@ -32,21 +32,6 @@ 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",
@@ -7,9 +7,6 @@
 package serve

 import (
-	"context"
-	"fmt"
-	"log/slog"
 	"reflect"
 	"slices"
 	"strconv"
@@ -31,7 +28,7 @@ type metricsSet struct {
 	gaugeVecLabels map[string][]string
 	summaries      map[string]*metricSummary

-	collectMut    sync.RWMutex
+	collectMut    sync.Mutex
 	collectCutoff time.Duration
 }

@@ -47,7 +44,7 @@ func newMetricsSet(srv *server) *metricsSet {

 	var initForType func(reflect.Type)
 	initForType = func(t reflect.Type) {
-		for i := range t.NumField() {
+		for i := 0; i < t.NumField(); i++ {
 			field := t.Field(i)
 			if field.Type.Kind() == reflect.Struct {
 				initForType(field.Type)
@@ -111,60 +108,6 @@ 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)
@@ -175,7 +118,7 @@ func (s *metricsSet) addReport(r *contract.Report) {

 func (s *metricsSet) addReportStruct(v reflect.Value, gaugeVecs map[string][]string) {
 	t := v.Type()
-	for i := range v.NumField() {
+	for i := 0; i < v.NumField(); i++ {
 		field := v.Field(i)
 		if field.Kind() == reflect.Struct {
 			s.addReportStruct(field, gaugeVecs)
@@ -255,8 +198,8 @@ func (s *metricsSet) Describe(c chan<- *prometheus.Desc) {
 }

 func (s *metricsSet) Collect(c chan<- prometheus.Metric) {
-	s.collectMut.RLock()
-	defer s.collectMut.RUnlock()
+	s.collectMut.Lock()
+	defer s.collectMut.Unlock()

 	t0 := time.Now()
 	defer func() {
@@ -266,6 +209,26 @@ 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
 	}
@@ -336,12 +299,12 @@ func (q *metricSummary) Collect(c chan<- prometheus.Metric) {
 		}

 		slices.Sort(vs)
-
-		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))...)
-		}
+		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")...)
 	}
 }

@@ -27,12 +27,11 @@ import (
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/puzpuzpuz/xsync/v3"
 	"github.com/syncthing/syncthing/internal/blob"
+	"github.com/syncthing/syncthing/internal/blob/azureblob"
 	"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/ur/contract"
-	"github.com/thejerf/suture/v4"
 )

 type CLI struct {
@@ -48,6 +47,10 @@ type CLI struct {
 	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"`
+
+	AzureBlobAccount   string `name:"azure-blob-account" env:"UR_AZUREBLOB_ACCOUNT"`
+	AzureBlobKey       string `name:"azure-blob-key" env:"UR_AZUREBLOB_KEY"`
+	AzureBlobContainer string `name:"azure-blob-container" env:"UR_AZUREBLOB_CONTAINER"`
 }

 var (
@@ -74,8 +77,7 @@ var (
 		{regexp.MustCompile(`\svagrant@bullseye`), "F-Droid"},
 		{regexp.MustCompile(`\svagrant@bookworm`), "F-Droid"},

-		{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(`Anwender@NET2017`), "Syncthing-Fork (3rd party)"},

 		{regexp.MustCompile(`\sbuilduser@(archlinux|svetlemodry)`), "Arch (3rd party)"},
 		{regexp.MustCompile(`\ssyncthing@archlinux`), "Arch (3rd party)"},
@@ -102,23 +104,23 @@ func (cli *CLI) Run() error {

 	urListener, err := net.Listen("tcp", cli.Listen)
 	if err != nil {
-		slog.Error("Failed to listen (usage reports)", slogutil.Error(err))
+		slog.Error("Failed to listen (usage reports)", "error", err)
 		return err
 	}
-	slog.Info("Listening (usage reports)", slogutil.Address(urListener.Addr()))
+	slog.Info("Listening (usage reports)", "address", urListener.Addr())

 	internalListener, err := net.Listen("tcp", cli.ListenInternal)
 	if err != nil {
-		slog.Error("Failed to listen (internal)", slogutil.Error(err))
+		slog.Error("Failed to listen (internal)", "error", err)
 		return err
 	}
-	slog.Info("Listening (internal)", slogutil.Address(internalListener.Addr()))
+	slog.Info("Listening (internal)", "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", slogutil.Error(err))
+			slog.Error("Failed to load GeoIP", "error", err)
 			return err
 		}
 		go geo.Serve(context.TODO())
@@ -130,14 +132,20 @@ func (cli *CLI) Run() error {
 	if cli.S3Endpoint != "" {
 		blobs, err = s3.NewSession(cli.S3Endpoint, cli.S3Region, cli.S3Bucket, cli.S3AccessKeyID, cli.S3SecretKey)
 		if err != nil {
-			slog.Error("Failed to create S3 session", slogutil.Error(err))
+			slog.Error("Failed to create S3 session", "error", err)
+			return err
+		}
+	} else if cli.AzureBlobAccount != "" {
+		blobs, err = azureblob.NewBlobStore(cli.AzureBlobAccount, cli.AzureBlobKey, cli.AzureBlobContainer)
+		if err != nil {
+			slog.Error("Failed to create Azure blob store", "error", err)
 			return 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))
+			slog.Error("Failed to download dump file", "error", err)
 		}
 	}

@@ -159,7 +167,7 @@ func (cli *CLI) Run() error {
 	go func() {
 		for range time.Tick(cli.DumpInterval) {
 			if err := cli.saveDumpFile(srv, blobs); err != nil {
-				slog.Error("Failed to write dump file", slogutil.Error(err))
+				slog.Error("Failed to write dump file", "error", err)
 			}
 		}
 	}()
@@ -178,12 +186,7 @@ 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)

@@ -194,7 +197,7 @@ func (cli *CLI) Run() error {

 	metricsSrv := http.Server{
 		ReadTimeout:  5 * time.Second,
-		WriteTimeout: 60 * time.Second,
+		WriteTimeout: 15 * time.Second,
 		Handler:      mux,
 	}

@@ -223,11 +226,6 @@ func (cli *CLI) downloadDumpFile(blobs blob.Store) 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)
@@ -246,10 +244,9 @@ func (cli *CLI) saveDumpFile(srv *server, blobs blob.Store) 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", "d", time.Since(t0).String())
+	slog.Info("Dump file saved")

 	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 {
@@ -259,7 +256,7 @@ func (cli *CLI) saveDumpFile(srv *server, blobs blob.Store) error {
 			return fmt.Errorf("uploading dump file: %w", err)
 		}
 		_ = fd.Close()
-		slog.Info("Dump file uploaded", "d", time.Since(t1).String())
+		slog.Info("Dump file uploaded")
 	}

 	return nil
@@ -310,7 +307,7 @@ 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", slogutil.Error(err))
+		log.Error("Failed to decode JSON", "error", err)
 		http.Error(w, "JSON Decode Error", http.StatusInternalServerError)
 		return
 	}
@@ -320,7 +317,7 @@ 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", slogutil.Error(err))
+		log.Error("Failed to validate report", "error", err)
 		http.Error(w, "Validation Error", http.StatusInternalServerError)
 		return
 	}
@@ -371,13 +368,6 @@ func (s *server) addReport(rep *contract.Report) bool {
 	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
 }
@@ -397,7 +387,6 @@ 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 {
@@ -405,12 +394,12 @@ 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", slogutil.Error(err))
+			slog.Error("Failed to load record", "error", err)
 			break
 		}
 		s.addReport(&rep)
 	}
-	slog.Info("Loaded reports", "count", s.reports.Size(), "d", time.Since(t0).String())
+	slog.Info("Loaded reports", "count", s.reports.Size())
 }

 var (
@@ -10,7 +10,7 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"log/slog"
+	"log"

 	amqp "github.com/rabbitmq/amqp091-go"
 	"github.com/thejerf/suture/v4"
@@ -23,7 +23,6 @@ import (

 type amqpReplicator struct {
 	suture.Service
-
 	broker   string
 	sender   *amqpSender
 	receiver *amqpReceiver
@@ -173,7 +172,7 @@ func (s *amqpReceiver) Serve(ctx context.Context) error {
 				id, err = protocol.DeviceIDFromString(string(rec.Key))
 			}
 			if err != nil {
-				slog.Warn("Failed to parse replication device ID", "error", err)
+				log.Println("Replication device ID:", err)
 				replicationRecvsTotal.WithLabelValues("error").Inc()
 				continue
 			}
@@ -18,7 +18,6 @@ import (
 	"fmt"
 	io "io"
 	"log"
-	"log/slog"
 	"math/rand"
 	"net"
 	"net/http"
@@ -67,7 +66,7 @@ type contextKey int

 const idKey contextKey = iota

-func newAPISrv(addr string, cert tls.Certificate, db database, repl replicator, useHTTP, compression bool, desiredUnseenNotFoundRate, desiredSeenNotFoundRate float64) *apiSrv {
+func newAPISrv(addr string, cert tls.Certificate, db database, repl replicator, useHTTP, compression bool, desiredNotFoundRate float64) *apiSrv {
 	return &apiSrv{
 		addr:        addr,
 		cert:        cert,
@@ -78,13 +77,13 @@ func newAPISrv(addr string, cert tls.Certificate, db database, repl replicator,
 		seenTracker: &retryAfterTracker{
 			name:         "seenTracker",
 			bucketStarts: time.Now(),
-			desiredRate:  desiredSeenNotFoundRate,
+			desiredRate:  desiredNotFoundRate / 2,
 			currentDelay: notFoundRetryUnknownMinSeconds,
 		},
 		notSeenTracker: &retryAfterTracker{
 			name:         "notSeenTracker",
 			bucketStarts: time.Now(),
-			desiredRate:  desiredUnseenNotFoundRate,
+			desiredRate:  desiredNotFoundRate / 2,
 			currentDelay: notFoundRetryUnknownMaxSeconds / 2,
 		},
 	}
@@ -94,7 +93,7 @@ func (s *apiSrv) Serve(ctx context.Context) error {
 	if s.useHTTP {
 		listener, err := net.Listen("tcp", s.addr)
 		if err != nil {
-			slog.ErrorContext(ctx, "Failed to listen", "error", err)
+			log.Println("Listen:", err)
 			return err
 		}
 		s.listener = listener
@@ -108,7 +107,7 @@ func (s *apiSrv) Serve(ctx context.Context) error {

 		tlsListener, err := tls.Listen("tcp", s.addr, tlsCfg)
 		if err != nil {
-			slog.ErrorContext(ctx, "Failed to listen", "error", err)
+			log.Println("Listen:", err)
 			return err
 		}
 		s.listener = tlsListener
@@ -133,7 +132,7 @@ func (s *apiSrv) Serve(ctx context.Context) error {

 	err := srv.Serve(s.listener)
 	if err != nil {
-		slog.ErrorContext(ctx, "Failed to serve", "error", err)
+		log.Println("Serve:", err)
 	}
 	return err
 }
@@ -152,7 +151,9 @@ func (s *apiSrv) handler(w http.ResponseWriter, req *http.Request) {
 	reqID := requestID(rand.Int63())
 	req = req.WithContext(context.WithValue(req.Context(), idKey, reqID))

-	slog.Debug("Handling request", "id", reqID, "method", req.Method, "url", req.URL, "proto", req.Proto)
+	if debug {
+		log.Println(reqID, req.Method, req.URL, req.Proto)
+	}

 	remoteAddr := &net.TCPAddr{
 		IP:   nil,
@@ -173,7 +174,7 @@ func (s *apiSrv) handler(w http.ResponseWriter, req *http.Request) {
 		var err error
 		remoteAddr, err = net.ResolveTCPAddr("tcp", req.RemoteAddr)
 		if err != nil {
-			slog.Warn("Failed to resolve remote address", "address", req.RemoteAddr, "error", err)
+			log.Println("remoteAddr:", err)
 			lw.Header().Set("Retry-After", errorRetryAfterString())
 			http.Error(lw, "Internal Server Error", http.StatusInternalServerError)
 			apiRequestsTotal.WithLabelValues("no_remote_addr").Inc()
@@ -196,7 +197,9 @@ func (s *apiSrv) handleGET(w http.ResponseWriter, req *http.Request) {

 	deviceID, err := protocol.DeviceIDFromString(req.URL.Query().Get("device"))
 	if err != nil {
-		slog.Debug("Request with bad device param", "id", reqID, "error", err)
+		if debug {
+			log.Println(reqID, "bad device param:", err)
+		}
 		lookupRequestsTotal.WithLabelValues("bad_request").Inc()
 		w.Header().Set("Retry-After", errorRetryAfterString())
 		http.Error(w, "Bad Request", http.StatusBadRequest)
@@ -254,9 +257,11 @@ 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 := s.certificateBytes(req)
+	rawCert, err := certificateBytes(req)
 	if err != nil {
-		slog.Debug("Request without certificates", "id", reqID, "error", err)
+		if debug {
+			log.Println(reqID, "no certificates:", err)
+		}
 		announceRequestsTotal.WithLabelValues("no_certificate").Inc()
 		w.Header().Set("Retry-After", errorRetryAfterString())
 		http.Error(w, "Forbidden", http.StatusForbidden)
@@ -265,7 +270,9 @@ func (s *apiSrv) handlePOST(remoteAddr *net.TCPAddr, w http.ResponseWriter, req

 	var ann announcement
 	if err := json.NewDecoder(req.Body).Decode(&ann); err != nil {
-		slog.Debug("Failed to decode request", "id", reqID, "error", err)
+		if debug {
+			log.Println(reqID, "decode:", err)
+		}
 		announceRequestsTotal.WithLabelValues("bad_request").Inc()
 		w.Header().Set("Retry-After", errorRetryAfterString())
 		http.Error(w, "Bad Request", http.StatusBadRequest)
@@ -276,7 +283,9 @@ func (s *apiSrv) handlePOST(remoteAddr *net.TCPAddr, w http.ResponseWriter, req

 	addresses := fixupAddresses(remoteAddr, ann.Addresses)
 	if len(addresses) == 0 {
-		slog.Debug("Request without addresses", "id", reqID, "error", err)
+		if debug {
+			log.Println(reqID, "no addresses")
+		}
 		announceRequestsTotal.WithLabelValues("bad_request").Inc()
 		w.Header().Set("Retry-After", errorRetryAfterString())
 		http.Error(w, "Bad Request", http.StatusBadRequest)
@@ -284,7 +293,9 @@ func (s *apiSrv) handlePOST(remoteAddr *net.TCPAddr, w http.ResponseWriter, req
 	}

 	if err := s.handleAnnounce(deviceID, addresses); err != nil {
-		slog.Debug("Failed to handle request", "id", reqID, "error", err)
+		if debug {
+			log.Println(reqID, "handle:", err)
+		}
 		announceRequestsTotal.WithLabelValues("internal_error").Inc()
 		w.Header().Set("Retry-After", errorRetryAfterString())
 		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
@@ -295,7 +306,9 @@ func (s *apiSrv) handlePOST(remoteAddr *net.TCPAddr, w http.ResponseWriter, req

 	w.Header().Set("Reannounce-After", reannounceAfterString())
 	w.WriteHeader(http.StatusNoContent)
-	slog.Debug("Device announced", "id", reqID, "device", deviceID, "addresses", addresses)
+	if debug {
+		log.Println(reqID, "announced", deviceID, addresses)
+	}
 }

 func (s *apiSrv) Stop() {
@@ -330,17 +343,14 @@ func handlePing(w http.ResponseWriter, _ *http.Request) {
 	w.WriteHeader(http.StatusNoContent)
 }

-func (s *apiSrv) certificateBytes(req *http.Request) ([]byte, error) {
+func 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.
@@ -402,7 +412,10 @@ func (s *apiSrv) certificateBytes(req *http.Request) ([]byte, error) {
 		b.WriteByte('\n')

 		for i := 0; i < len(cert); i += 64 {
-			end := min(i+64, len(cert))
+			end := i + 64
+			if end > len(cert) {
+				end = len(cert)
+			}
 			b.WriteString(cert[i:end])
 			b.WriteByte('\n')
 		}
@@ -500,7 +513,6 @@ func fixupAddresses(remote *net.TCPAddr, addresses []string) []string {

 type loggingResponseWriter struct {
 	http.ResponseWriter
-
 	statusCode int
 }

@@ -564,17 +576,5 @@ func (t *retryAfterTracker) retryAfterS() int {
 	}
 	t.curCount++
 	t.mut.Unlock()
-
-	// 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)
+	return t.currentDelay + rand.Intn(t.currentDelay/4)
 }
@@ -7,6 +7,7 @@
 package main

 import (
+	"context"
 	"crypto/tls"
 	"fmt"
 	"io"
@@ -17,7 +18,6 @@ import (
 	"regexp"
 	"strings"
 	"testing"
-	"time"

 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/tlsutil"
@@ -106,59 +106,16 @@ 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 range n {
-		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 := min((i+1)*bucketSize, 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 := b.Context()
+	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, 1000, 1000)
+	api := newAPISrv("127.0.0.1:0", tls.Certificate{}, db, nil, true, true, 1000)
 	srv := httptest.NewServer(http.HandlerFunc(api.handler))

 	kf := b.TempDir() + "/cert"
-	crt, err := tlsutil.NewCertificate(kf+".crt", kf+".key", "localhost", 7, true)
+	crt, err := tlsutil.NewCertificate(kf+".crt", kf+".key", "localhost", 7)
 	if err != nil {
 		b.Fatal(err)
 	}
@@ -13,9 +13,9 @@ import (
 	"encoding/binary"
 	"errors"
 	"io"
-	"log/slog"
+	"log"
 	"os"
-	"path/filepath"
+	"path"
 	"runtime"
 	"slices"
 	"strings"
@@ -74,24 +74,24 @@ func newInMemoryStore(dir string, flushInterval time.Duration, blobs blob.Store)
 		// Try to read from blob storage
 		latestKey, cerr := blobs.LatestKey(context.Background())
 		if cerr != nil {
-			slog.Error("Failed to find database in blob storage", "error", cerr)
+			log.Println("Error finding database from blob storage:", cerr)
 			return s
 		}
-		fd, cerr := os.Create(filepath.Join(s.dir, "records.db"))
+		fd, cerr := os.Create(path.Join(s.dir, "records.db"))
 		if cerr != nil {
-			slog.Error("Failed to create database file", "error", cerr)
+			log.Println("Error creating database file:", cerr)
 			return s
 		}
 		if cerr := blobs.Download(context.Background(), latestKey, fd); cerr != nil {
-			slog.Error("Failed to download database from blob storage", "error", cerr)
+			log.Printf("Error downloading database from blob storage: %v", cerr)
 		}
 		_ = fd.Close()
 		nr, err = s.read()
 	}
 	if err != nil {
-		slog.Error("Failed to read database", "error", err)
+		log.Println("Error reading database:", err)
 	}
-	slog.Info("Loaded database", "records", nr)
+	log.Printf("Read %d records from database", 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(newRec, oldRec)
+		newRec = merge(oldRec, newRec)
 	}
 	s.m.Store(*key, newRec)

@@ -135,13 +135,7 @@ func (s *inMemoryStore) get(key *protocol.DeviceID) (*discosrv.DatabaseRecord, e
 		return &discosrv.DatabaseRecord{}, nil
 	}

-	naddresses, changed := expire(rec.Addresses, s.clock.Now())
-	if changed {
-		rec = &discosrv.DatabaseRecord{
-			Addresses: naddresses,
-			Seen:      rec.Seen,
-		}
-	}
+	rec.Addresses = expire(rec.Addresses, s.clock.Now())
 	databaseOperations.WithLabelValues(dbOpGet, dbResSuccess).Inc()
 	return rec, nil
 }
@@ -159,13 +153,13 @@ loop:
 	for {
 		select {
 		case <-t.C:
-			slog.InfoContext(ctx, "Calculating statistics")
+			log.Println("Calculating statistics")
 			s.expireAndCalculateStatistics()
-			slog.InfoContext(ctx, "Flushing database")
+			log.Println("Flushing database")
 			if err := s.write(); err != nil {
-				slog.ErrorContext(ctx, "Failed to write database", "error", err)
+				log.Println("Error writing database:", err)
 			}
-			slog.InfoContext(ctx, "Finished flushing database")
+			log.Println("Finished flushing database")
 			t.Reset(s.flushInterval)

 		case <-ctx.Done():
@@ -190,12 +184,12 @@ func (s *inMemoryStore) expireAndCalculateStatistics() {
 		}
 		n++

-		addresses, changed := expire(rec.Addresses, now)
-		if changed {
-			rec = &discosrv.DatabaseRecord{
-				Addresses: addresses,
-				Seen:      rec.Seen,
-			}
+		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
 			s.m.Store(key, rec)
 		}

@@ -257,12 +251,12 @@ func (s *inMemoryStore) write() (err error) {
 		}
 	}()

-	dbf := filepath.Join(s.dir, "records.db")
+	dbf := path.Join(s.dir, "records.db")
 	fd, err := os.Create(dbf + ".tmp")
 	if err != nil {
 		return err
 	}
-	bw := bufio.NewWriterSize(fd, 1<<20)
+	bw := bufio.NewWriter(fd)

 	var buf []byte
 	var rangeErr error
@@ -306,7 +300,7 @@ func (s *inMemoryStore) write() (err error) {
 	}

 	if err := bw.Flush(); err != nil {
-		_ = fd.Close()
+		_ = fd.Close
 		return err
 	}
 	if err := fd.Close(); err != nil {
@@ -316,31 +310,25 @@ func (s *inMemoryStore) write() (err error) {
 		return err
 	}

-	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 {
-			slog.Error("Failed to upload database to blob storage", "error", err)
+			log.Printf("Error uploading database to blob storage: %v", err)
 			return nil
 		}
 		defer fd.Close()
 		if err := s.blobs.Upload(context.Background(), s.objKey, fd); err != nil {
-			slog.Error("Failed to upload database to blob storage", "error", err)
+			log.Printf("Error uploading database to blob storage: %v", err)
 		}
-		slog.Info("Finished uploading database")
+		log.Println("Finished uploading database")
 	}

 	return nil
 }

 func (s *inMemoryStore) read() (int, error) {
-	fd, err := os.Open(filepath.Join(s.dir, "records.db"))
+	fd, err := os.Open(path.Join(s.dir, "records.db"))
 	if err != nil {
 		return 0, err
 	}
@@ -372,14 +360,14 @@ func (s *inMemoryStore) read() (int, error) {
 			key, err = protocol.DeviceIDFromString(string(rec.Key))
 		}
 		if err != nil {
-			slog.Error("Got bad device ID while reading database", "error", err)
+			log.Println("Bad device ID:", err)
 			continue
 		}

 		slices.SortFunc(rec.Addresses, Cmp)
-		rec.Addresses, _ = expire(slices.CompactFunc(rec.Addresses, Equal), s.clock.Now())
+		rec.Addresses = slices.CompactFunc(rec.Addresses, Equal)
 		s.m.Store(key, &discosrv.DatabaseRecord{
-			Addresses: rec.Addresses,
+			Addresses: expire(rec.Addresses, s.clock.Now()),
 			Seen:      rec.Seen,
 		})
 		nr++
@@ -390,7 +378,7 @@ 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; b is not modified.
+// reused for the result.
 func merge(a, b *discosrv.DatabaseRecord) *discosrv.DatabaseRecord {
 	// Both lists must be sorted for this to work.

@@ -421,33 +409,25 @@ func merge(a, b *discosrv.DatabaseRecord) *discosrv.DatabaseRecord {
 	return a
 }

-// 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) {
+// 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 {
 	cutoff := now.UnixNano()
-	remains := 0
-	for _, a := range addrs {
-		if a.Expires < cutoff {
-			changed = true
-		} else {
-			remains++
+	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])
 		}
 	}
-	if !changed {
-		return addrs, false
+	if len(naddrs) == 0 {
+		return nil
 	}
-	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
+	return naddrs
 }

 func Cmp(d, other *discosrv.DatabaseAddress) (n int) {
@@ -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)
 		}
@@ -9,12 +9,12 @@ package main
 import (
 	"context"
 	"crypto/tls"
-	"fmt"
-	"log/slog"
+	"log"
 	"net/http"
+	_ "net/http/pprof"
 	"os"
 	"os/signal"
-	"syscall"
+	"runtime"
 	"time"

 	"github.com/alecthomas/kong"
@@ -22,8 +22,9 @@ import (
 	"github.com/thejerf/suture/v4"

 	"github.com/syncthing/syncthing/internal/blob"
+	"github.com/syncthing/syncthing/internal/blob/azureblob"
 	"github.com/syncthing/syncthing/internal/blob/s3"
-	"github.com/syncthing/syncthing/internal/slogutil"
+	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/build"
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/rand"
@@ -31,7 +32,8 @@ import (
 )

 const (
-	addressExpiryTime = 2 * time.Hour
+	addressExpiryTime          = 2 * time.Hour
+	databaseStatisticsInterval = 5 * time.Minute

 	// Reannounce-After is set to reannounceAfterSeconds +
 	// random(reannounzeFuzzSeconds), similar for Retry-After
@@ -58,16 +60,13 @@ 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"`
-	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"`
+	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"`
+	DesiredNotFoundRate float64 `group:"Listen" help:"Desired maximum rate of not-found replies (/s)" default:"1000"`

 	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"`
@@ -78,6 +77,10 @@ type CLI struct {
 	DBS3AccessKeyID string `name:"db-s3-access-key-id" group:"Database (S3 backup)" hidden:"true" help:"S3 access key ID for database" env:"DISCOVERY_DB_S3_ACCESS_KEY_ID"`
 	DBS3SecretKey   string `name:"db-s3-secret-key" group:"Database (S3 backup)" hidden:"true" help:"S3 secret key for database" env:"DISCOVERY_DB_S3_SECRET_KEY"`

+	DBAzureBlobAccount   string `name:"db-azure-blob-account" env:"DISCOVERY_DB_AZUREBLOB_ACCOUNT"`
+	DBAzureBlobKey       string `name:"db-azure-blob-key" env:"DISCOVERY_DB_AZUREBLOB_KEY"`
+	DBAzureBlobContainer string `name:"db-azure-blob-container" env:"DISCOVERY_DB_AZUREBLOB_CONTAINER"`
+
 	AMQPAddress string `group:"AMQP replication" hidden:"true" help:"Address to AMQP broker" env:"DISCOVERY_AMQP_ADDRESS"`

 	Debug   bool `short:"d" help:"Print debug output" env:"DISCOVERY_DEBUG"`
@@ -85,37 +88,34 @@ type CLI struct {
 }

 func main() {
+	log.SetOutput(os.Stdout)
+
 	var cli CLI
 	kong.Parse(&cli)
+	debug = cli.Debug

-	level := slog.LevelInfo
-	if cli.Debug {
-		level = slog.LevelDebug
-	}
-	slogutil.SetDefaultLevel(level)
+	log.Println(build.LongVersionFor("stdiscosrv"))
 	if cli.Version {
-		fmt.Println(build.LongVersionFor("stdiscosrv"))
 		return
 	}
-	slog.Info(build.LongVersionFor("stdiscosrv"))
+
+	buildInfo.WithLabelValues(build.Version, runtime.Version(), build.User, build.Date.UTC().Format("2006-01-02T15:04:05Z")).Set(1)

 	var cert tls.Certificate
 	if !cli.HTTP {
 		var err error
 		cert, err = tls.LoadX509KeyPair(cli.Cert, cli.Key)
 		if os.IsNotExist(err) {
-			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)
+			log.Println("Failed to load keypair. Generating one, this might take a while...")
+			cert, err = tlsutil.NewCertificate(cli.Cert, cli.Key, "stdiscosrv", 20*365)
 			if err != nil {
-				slog.Error("Failed to generate X509 key pair", "error", err)
-				os.Exit(1)
+				log.Fatalln("Failed to generate X509 key pair:", err)
 			}
 		} else if err != nil {
-			slog.Error("Failed to load keypair", "error", err)
-			os.Exit(1)
+			log.Fatalln("Failed to load keypair:", err)
 		}
 		devID := protocol.NewDeviceID(cert.Certificate[0])
-		slog.Info("Loaded certificate keypair", "deviceId", devID.String())
+		log.Println("Server device ID is", devID)
 	}

 	// Root of the service tree.
@@ -129,10 +129,11 @@ func main() {
 	var err error
 	if cli.DBS3Endpoint != "" {
 		blobs, err = s3.NewSession(cli.DBS3Endpoint, cli.DBS3Region, cli.DBS3Bucket, cli.DBS3AccessKeyID, cli.DBS3SecretKey)
+	} else if cli.DBAzureBlobAccount != "" {
+		blobs, err = azureblob.NewBlobStore(cli.DBAzureBlobAccount, cli.DBAzureBlobKey, cli.DBAzureBlobContainer)
 	}
 	if err != nil {
-		slog.Error("Failed to create blob store", "error", err)
-		os.Exit(1)
+		log.Fatalf("Failed to create blob store: %v", err)
 	}

 	// Start the database.
@@ -149,7 +150,7 @@ func main() {
 	}

 	// Start the main API server.
-	qs := newAPISrv(cli.Listen, cert, db, repl, cli.HTTP, cli.Compression, cli.DesiredUnseenNotFoundRate, cli.DesiredSeenNotFoundRate)
+	qs := newAPISrv(cli.Listen, cert, db, repl, cli.HTTP, cli.Compression, cli.DesiredNotFoundRate)
 	main.Add(qs)

 	// If we have a metrics port configured, start a metrics handler.
@@ -157,9 +158,7 @@ func main() {
 		go func() {
 			mux := http.NewServeMux()
 			mux.Handle("/metrics", promhttp.Handler())
-			err := http.ListenAndServe(cli.MetricsListen, mux)
-			slog.Error("Failed to serve", "error", err)
-			os.Exit(1)
+			log.Fatal(http.ListenAndServe(cli.MetricsListen, mux))
 		}()
 	}

@@ -169,11 +168,9 @@ 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
-		slog.Info("Received signal; shutting down", "signal", sig, "delay", cli.ShutdownDelay)
-		time.Sleep(time.Duration(float64(time.Second) * cli.ShutdownDelay))
+		log.Printf("Received signal %s; shutting down", sig)
 		cancel()
 	}()

@@ -7,12 +7,18 @@
 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",
@@ -115,15 +121,18 @@ var (
 )

 const (
-	dbOpGet       = "get"
-	dbOpPut       = "put"
-	dbOpMerge     = "merge"
-	dbResSuccess  = "success"
-	dbResNotFound = "not_found"
+	dbOpGet             = "get"
+	dbOpPut             = "put"
+	dbOpMerge           = "merge"
+	dbOpDelete          = "delete"
+	dbResSuccess        = "success"
+	dbResNotFound       = "not_found"
+	dbResError          = "error"
+	dbResUnmarshalError = "unmarsh_err"
 )

 func init() {
-	prometheus.MustRegister(
+	prometheus.MustRegister(buildInfo,
 		apiRequestsTotal, apiRequestsSeconds,
 		lookupRequestsTotal, announceRequestsTotal,
 		replicationSendsTotal, replicationRecvsTotal,
@@ -131,24 +140,4 @@ 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")
 }
@@ -18,7 +18,7 @@ import (

 var (
 	outboxesMut    = sync.RWMutex{}
-	outboxes       = make(map[syncthingprotocol.DeviceID]chan any)
+	outboxes       = make(map[syncthingprotocol.DeviceID]chan interface{})
 	numConnections atomic.Int64
 )

@@ -97,9 +97,9 @@ func protocolConnectionHandler(tcpConn net.Conn, config *tls.Config, token strin

 	id := syncthingprotocol.NewDeviceID(certs[0].Raw)

-	messages := make(chan any)
+	messages := make(chan interface{})
 	errors := make(chan error, 1)
-	outbox := make(chan any)
+	outbox := make(chan interface{})

 	// Read messages from the connection and send them on the messages
 	// channel. When there is an error, send it on the error channel and
@@ -364,7 +364,7 @@ func sessionConnectionHandler(conn net.Conn) {
 	}
 }

-func messageReader(conn net.Conn, messages chan<- any, errors chan<- error) {
+func messageReader(conn net.Conn, messages chan<- interface{}, errors chan<- error) {
 	numConnections.Add(1)
 	defer numConnections.Add(-1)

@@ -14,7 +14,6 @@ import (
 	"os"
 	"os/signal"
 	"path/filepath"
-	"strconv"
 	"strings"
 	"sync/atomic"
 	"syscall"
@@ -22,6 +21,7 @@ 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"
@@ -71,13 +71,9 @@ var (

 // httpClient is the HTTP client we use for outbound requests. It has a
 // timeout and may get further options set during initialization.
-var (
-	httpTransport = &http.Transport{}
-	httpClient    = &http.Client{
-		Timeout:   30 * time.Second,
-		Transport: httpTransport,
-	}
-)
+var httpClient = &http.Client{
+	Timeout: 30 * time.Second,
+}

 func main() {
 	log.SetFlags(log.Lshortfile | log.LstdFlags)
@@ -136,7 +132,9 @@ func main() {
 		// also come from that address.
 		laddr.Port = 0
 		boundDialer := &net.Dialer{LocalAddr: laddr}
-		httpTransport.DialContext = boundDialer.DialContext
+		httpClient.Transport = &http.Transport{
+			DialContext: boundDialer.DialContext,
+		}
 	}

 	log.Println(longVer)
@@ -159,17 +157,12 @@ 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, false)
+		cert, err = tlsutil.NewCertificate(certFile, keyFile, "strelaysrv", 20*365)
 		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},
@@ -254,10 +247,10 @@ func main() {
 	query.Set("pingInterval", pingInterval.String())
 	query.Set("networkTimeout", networkTimeout.String())
 	if sessionLimitBps > 0 {
-		query.Set("sessionLimitBps", strconv.Itoa(sessionLimitBps))
+		query.Set("sessionLimitBps", fmt.Sprint(sessionLimitBps))
 	}
 	if globalLimitBps > 0 {
-		query.Set("globalLimitBps", strconv.Itoa(globalLimitBps))
+		query.Set("globalLimitBps", fmt.Sprint(globalLimitBps))
 	}
 	if statusAddr != "" {
 		query.Set("statusAddr", statusAddr)
@@ -284,7 +277,7 @@ func main() {
 	for _, pool := range pools {
 		pool = strings.TrimSpace(pool)
 		if len(pool) > 0 {
-			go poolHandler(pool, uri, mapping)
+			go poolHandler(pool, uri, mapping, cert)
 		}
 	}

@@ -4,6 +4,7 @@ package main

 import (
 	"bytes"
+	"crypto/tls"
 	"encoding/json"
 	"io"
 	"log"
@@ -16,7 +17,7 @@ const (
 	httpStatusEnhanceYourCalm = 429
 )

-func poolHandler(pool string, uri *url.URL, mapping mapping) {
+func poolHandler(pool string, uri *url.URL, mapping mapping, ownCert tls.Certificate) {
 	if debug {
 		log.Println("Joining", pool)
 	}
@@ -31,7 +32,24 @@ func poolHandler(pool string, uri *url.URL, mapping mapping) {
 			uriCopy.String(),
 		})

-		resp, err := httpClient.Post(pool, "application/json", &b) //nolint:noctx
+		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)
 		if err != nil {
 			log.Printf("Error joining pool %v: HTTP request: %v", pool, err)
 			time.Sleep(time.Minute)
@@ -158,12 +158,19 @@ func (s *session) Serve() {
 			}

 			wg := sync.WaitGroup{}
+			wg.Add(2)

 			var err0 error
-			wg.Go(func() { err0 = s.proxy(s.conns[0], s.conns[1]) })
+			go func() {
+				err0 = s.proxy(s.conns[0], s.conns[1])
+				wg.Done()
+			}()

 			var err1 error
-			wg.Go(func() { err1 = s.proxy(s.conns[1], s.conns[0]) })
+			go func() {
+				err1 = s.proxy(s.conns[1], s.conns[0])
+				wg.Done()
+			}()

 			sessionMut.Lock()
 			activeSessions = append(activeSessions, s)
@@ -330,7 +337,10 @@ func take(tokens int, ls ...*rate.Limiter) {

 	for tokens > 0 {
 		// chunk is how many tokens we can consume at a time
-		chunk := min(tokens, minBurst)
+		chunk := tokens
+		if chunk > minBurst {
+			chunk = minBurst
+		}

 		// maxDelay is the longest delay mandated by any of the limiters for
 		// the chosen chunk size.
@@ -38,7 +38,7 @@ func statusService(addr string) {

 func getStatus(w http.ResponseWriter, _ *http.Request) {
 	w.Header().Set("Access-Control-Allow-Origin", "*")
-	status := make(map[string]any)
+	status := make(map[string]interface{})

 	sessionMut.Lock()
 	// This can potentially be double the number of pending sessions, as each session has two keys, one for each side.
@@ -67,7 +67,7 @@ func getStatus(w http.ResponseWriter, _ *http.Request) {
 		rc.rate(30*60/10) * 8 / 1000,
 		rc.rate(60*60/10) * 8 / 1000,
 	}
-	status["options"] = map[string]any{
+	status["options"] = map[string]interface{}{
 		"network-timeout":  networkTimeout / time.Second,
 		"ping-interval":    pingInterval / time.Second,
 		"message-timeout":  messageTimeout / time.Second,
@@ -122,7 +122,7 @@ func (r *rateCalculator) updateRates(interval time.Duration) {

 func (r *rateCalculator) rate(periods int) int64 {
 	var tot int64
-	for i := range periods {
+	for i := 0; i < periods; i++ {
 		tot += r.rates[i]
 	}
 	return tot / int64(periods)
@@ -6,7 +6,6 @@ import (
 	"bufio"
 	"context"
 	"crypto/tls"
-	"errors"
 	"flag"
 	"log"
 	"net"
@@ -15,6 +14,7 @@ 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"
@@ -133,8 +133,7 @@ func connectToStdio(stdin <-chan string, conn net.Conn) {
 		conn.SetReadDeadline(time.Now().Add(time.Millisecond))
 		n, err := conn.Read(buf[0:])
 		if err != nil {
-			var nerr net.Error
-			ok := errors.As(err, &nerr)
+			nerr, ok := err.(net.Error)
 			if !ok || !nerr.Timeout() {
 				log.Println(err)
 				return
@@ -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
@@ -8,14 +8,11 @@ package main

 import (
 	"fmt"
-	"log/slog"
 	"os"
 	"runtime"
 	"runtime/pprof"
 	"syscall"
 	"time"
-
-	"github.com/syncthing/syncthing/internal/slogutil"
 )

 func startBlockProfiler() {
@@ -23,10 +20,10 @@ func startBlockProfiler() {
 	if profiler == nil {
 		panic("Couldn't find block profiler")
 	}
-	slog.Debug("Starting block profiling")
+	l.Debugln("Starting block profiling")
 	go func() {
 		err := saveBlockingProfiles(profiler) // Only returns on error
-		slog.Error("Block profiler failed", slogutil.Error(err))
+		l.Warnln("Block profiler failed:", err)
 		panic("Block profiler failed")
 	}()
 }
@@ -27,12 +27,11 @@ import (
 type APIClient interface {
 	Get(url string) (*http.Response, error)
 	Post(url, body string) (*http.Response, error)
-	PutJSON(url string, o any) (*http.Response, error)
+	PutJSON(url string, o interface{}) (*http.Response, error)
 }

 type apiClient struct {
 	http.Client
-
 	cfg    config.GUIConfiguration
 	apikey string
 }
@@ -92,11 +91,11 @@ 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
@@ -114,7 +113,7 @@ 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
@@ -134,7 +133,7 @@ func (c *apiClient) RequestString(url, method, data string) (*http.Response, err
 	return c.Request(url, method, bytes.NewBufferString(data))
 }

-func (c *apiClient) RequestJSON(url, method string, o any) (*http.Response, error) {
+func (c *apiClient) RequestJSON(url, method string, o interface{}) (*http.Response, error) {
 	data, err := json.Marshal(o)
 	if err != nil {
 		return nil, err
@@ -150,7 +149,7 @@ func (c *apiClient) Post(url, body string) (*http.Response, error) {
 	return c.RequestString(url, "POST", body)
 }

-func (c *apiClient) PutJSON(url string, o any) (*http.Response, error) {
+func (c *apiClient) PutJSON(url string, o interface{}) (*http.Response, error) {
 	return c.RequestJSON(url, "PUT", o)
 }

@@ -10,7 +10,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"net/http"
 	"reflect"

 	"github.com/AudriusButkevicius/recli"
@@ -19,53 +18,6 @@ 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
@@ -76,18 +28,13 @@ type configCommand struct {
 	Args []string `arg:"" default:"-h"`
 }

-func (c *configCommand) Run(ctx Context, outerCtx *kong.Context) error {
+func (c *configCommand) Run(ctx Context, _ *kong.Context) error {
 	app := cli.NewApp()
-	app.Name = "syncthing cli config"
-	app.HelpName = "syncthing cli config"
-	app.Description = outerCtx.Selected().Help
-	app.Metadata = map[string]any{
+	app.Name = "syncthing"
+	app.Author = "The Syncthing Authors"
+	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()
@@ -108,8 +55,6 @@ func (c *configCommand) Run(ctx Context, outerCtx *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

@@ -141,7 +86,7 @@ func (h *configHandler) configAfter(_ *cli.Context) error {
 	if err != nil {
 		return err
 	}
-	if resp.StatusCode != http.StatusOK {
+	if resp.StatusCode != 200 {
 		body, err := responseToBArray(resp)
 		if err != nil {
 			return err
@@ -41,4 +41,5 @@ func (p *profileCommand) Run(ctx Context) error {
 type debugCommand struct {
 	File    fileCommand    `cmd:"" help:"Show information about a file (or directory/symlink)"`
 	Profile profileCommand `cmd:"" help:"Save a profile to help figuring out what Syncthing does"`
+	Index   indexCommand   `cmd:"" help:"Show information about the index (database)"`
 }
@@ -9,7 +9,6 @@ package cli
 import (
 	"errors"
 	"fmt"
-	"net/http"
 	"strings"

 	"github.com/alecthomas/kong"
@@ -35,7 +34,7 @@ func (e *errorsPushCommand) Run(ctx Context) error {
 	if err != nil {
 		return err
 	}
-	if response.StatusCode != http.StatusOK {
+	if response.StatusCode != 200 {
 		errStr = fmt.Sprint("Failed to push error\nStatus code: ", response.StatusCode)
 		bytes, err := responseToBArray(response)
 		if err != nil {
@@ -0,0 +1,32 @@
+// Copyright (C) 2014 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"github.com/alecthomas/kong"
+)
+
+type indexCommand struct {
+	Dump     struct{} `cmd:"" help:"Print the entire db"`
+	DumpSize struct{} `cmd:"" help:"Print the db size of different categories of information"`
+	Check    struct{} `cmd:"" help:"Check the database for inconsistencies"`
+	Account  struct{} `cmd:"" help:"Print key and value size statistics per key type"`
+}
+
+func (*indexCommand) Run(kongCtx *kong.Context) error {
+	switch kongCtx.Selected().Name {
+	case "dump":
+		return indexDump()
+	case "dump-size":
+		return indexDumpSize()
+	case "check":
+		return indexCheck()
+	case "account":
+		return indexAccount()
+	}
+	return nil
+}
@@ -0,0 +1,62 @@
+// Copyright (C) 2020 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"fmt"
+	"os"
+	"text/tabwriter"
+)
+
+// indexAccount prints key and data size statistics per class
+func indexAccount() error {
+	ldb, err := getDB()
+	if err != nil {
+		return err
+	}
+
+	it, err := ldb.NewPrefixIterator(nil)
+	if err != nil {
+		return err
+	}
+
+	var ksizes [256]int
+	var dsizes [256]int
+	var counts [256]int
+	var max [256]int
+
+	for it.Next() {
+		key := it.Key()
+		t := key[0]
+		ds := len(it.Value())
+		ks := len(key)
+		s := ks + ds
+
+		counts[t]++
+		ksizes[t] += ks
+		dsizes[t] += ds
+		if s > max[t] {
+			max[t] = s
+		}
+	}
+
+	tw := tabwriter.NewWriter(os.Stdout, 1, 1, 1, ' ', tabwriter.AlignRight)
+	toti, totds, totks := 0, 0, 0
+	for t := range ksizes {
+		if ksizes[t] > 0 {
+			// yes metric kilobytes 🤘
+			fmt.Fprintf(tw, "0x%02x:\t%d items,\t%d KB keys +\t%d KB data,\t%d B +\t%d B avg,\t%d B max\t\n", t, counts[t], ksizes[t]/1000, dsizes[t]/1000, ksizes[t]/counts[t], dsizes[t]/counts[t], max[t])
+			toti += counts[t]
+			totds += dsizes[t]
+			totks += ksizes[t]
+		}
+	}
+	fmt.Fprintf(tw, "Total\t%d items,\t%d KB keys +\t%d KB data.\t\n", toti, totks/1000, totds/1000)
+	tw.Flush()
+
+	return nil
+}
@@ -0,0 +1,162 @@
+// Copyright (C) 2015 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"encoding/binary"
+	"fmt"
+	"time"
+
+	"google.golang.org/protobuf/proto"
+
+	"github.com/syncthing/syncthing/internal/gen/bep"
+	"github.com/syncthing/syncthing/internal/gen/dbproto"
+	"github.com/syncthing/syncthing/lib/db"
+	"github.com/syncthing/syncthing/lib/protocol"
+)
+
+func indexDump() error {
+	ldb, err := getDB()
+	if err != nil {
+		return err
+	}
+	it, err := ldb.NewPrefixIterator(nil)
+	if err != nil {
+		return err
+	}
+	for it.Next() {
+		key := it.Key()
+		switch key[0] {
+		case db.KeyTypeDevice:
+			folder := binary.BigEndian.Uint32(key[1:])
+			device := binary.BigEndian.Uint32(key[1+4:])
+			name := nulString(key[1+4+4:])
+			fmt.Printf("[device] F:%d D:%d N:%q", folder, device, name)
+
+			var f bep.FileInfo
+			err := proto.Unmarshal(it.Value(), &f)
+			if err != nil {
+				return err
+			}
+			fmt.Printf(" V:%v\n", &f)
+
+		case db.KeyTypeGlobal:
+			folder := binary.BigEndian.Uint32(key[1:])
+			name := nulString(key[1+4:])
+			var flv dbproto.VersionList
+			proto.Unmarshal(it.Value(), &flv)
+			fmt.Printf("[global] F:%d N:%q V:%s\n", folder, name, &flv)
+
+		case db.KeyTypeBlock:
+			folder := binary.BigEndian.Uint32(key[1:])
+			hash := key[1+4 : 1+4+32]
+			name := nulString(key[1+4+32:])
+			fmt.Printf("[block] F:%d H:%x N:%q I:%d\n", folder, hash, name, binary.BigEndian.Uint32(it.Value()))
+
+		case db.KeyTypeDeviceStatistic:
+			fmt.Printf("[dstat] K:%x V:%x\n", key, it.Value())
+
+		case db.KeyTypeFolderStatistic:
+			fmt.Printf("[fstat] K:%x V:%x\n", key, it.Value())
+
+		case db.KeyTypeVirtualMtime:
+			folder := binary.BigEndian.Uint32(key[1:])
+			name := nulString(key[1+4:])
+			val := it.Value()
+			var realTime, virtualTime time.Time
+			realTime.UnmarshalBinary(val[:len(val)/2])
+			virtualTime.UnmarshalBinary(val[len(val)/2:])
+			fmt.Printf("[mtime] F:%d N:%q R:%v V:%v\n", folder, name, realTime, virtualTime)
+
+		case db.KeyTypeFolderIdx:
+			key := binary.BigEndian.Uint32(key[1:])
+			fmt.Printf("[folderidx] K:%d V:%q\n", key, it.Value())
+
+		case db.KeyTypeDeviceIdx:
+			key := binary.BigEndian.Uint32(key[1:])
+			val := it.Value()
+			device := "<nil>"
+			if len(val) > 0 {
+				dev, err := protocol.DeviceIDFromBytes(val)
+				if err != nil {
+					device = fmt.Sprintf("<invalid %d bytes>", len(val))
+				} else {
+					device = dev.String()
+				}
+			}
+			fmt.Printf("[deviceidx] K:%d V:%s\n", key, device)
+
+		case db.KeyTypeIndexID:
+			device := binary.BigEndian.Uint32(key[1:])
+			folder := binary.BigEndian.Uint32(key[5:])
+			fmt.Printf("[indexid] D:%d F:%d I:%x\n", device, folder, it.Value())
+
+		case db.KeyTypeFolderMeta:
+			folder := binary.BigEndian.Uint32(key[1:])
+			fmt.Printf("[foldermeta] F:%d", folder)
+			var cs dbproto.CountsSet
+			if err := proto.Unmarshal(it.Value(), &cs); err != nil {
+				fmt.Printf(" (invalid)\n")
+			} else {
+				fmt.Printf(" V:%v\n", &cs)
+			}
+
+		case db.KeyTypeMiscData:
+			fmt.Printf("[miscdata] K:%q V:%q\n", key[1:], it.Value())
+
+		case db.KeyTypeSequence:
+			folder := binary.BigEndian.Uint32(key[1:])
+			seq := binary.BigEndian.Uint64(key[5:])
+			fmt.Printf("[sequence] F:%d S:%d V:%q\n", folder, seq, it.Value())
+
+		case db.KeyTypeNeed:
+			folder := binary.BigEndian.Uint32(key[1:])
+			file := string(key[5:])
+			fmt.Printf("[need] F:%d V:%q\n", folder, file)
+
+		case db.KeyTypeBlockList:
+			fmt.Printf("[blocklist] H:%x\n", key[1:])
+
+		case db.KeyTypeBlockListMap:
+			folder := binary.BigEndian.Uint32(key[1:])
+			hash := key[5:37]
+			fileName := string(key[37:])
+			fmt.Printf("[blocklistmap] F:%d H:%x N:%s\n", folder, hash, fileName)
+
+		case db.KeyTypeVersion:
+			fmt.Printf("[version] H:%x", key[1:])
+			var v bep.Vector
+			err := proto.Unmarshal(it.Value(), &v)
+			if err != nil {
+				fmt.Printf(" (invalid)\n")
+			} else {
+				fmt.Printf(" V:%v\n", &v)
+			}
+
+		case db.KeyTypePendingFolder:
+			device := binary.BigEndian.Uint32(key[1:])
+			folder := string(key[5:])
+			var of dbproto.ObservedFolder
+			proto.Unmarshal(it.Value(), &of)
+			fmt.Printf("[pendingFolder] D:%d F:%s V:%v\n", device, folder, &of)
+
+		case db.KeyTypePendingDevice:
+			device := "<invalid>"
+			dev, err := protocol.DeviceIDFromBytes(key[1:])
+			if err == nil {
+				device = dev.String()
+			}
+			var od dbproto.ObservedDevice
+			proto.Unmarshal(it.Value(), &od)
+			fmt.Printf("[pendingDevice] D:%v V:%v\n", device, &od)
+
+		default:
+			fmt.Printf("[??? %d]\n  %x\n  %x\n", key[0], key, it.Value())
+		}
+	}
+	return nil
+}
@@ -0,0 +1,89 @@
+// Copyright (C) 2015 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"cmp"
+	"encoding/binary"
+	"fmt"
+	"slices"
+
+	"github.com/syncthing/syncthing/lib/db"
+)
+
+func indexDumpSize() error {
+	type sizedElement struct {
+		key  string
+		size int
+	}
+
+	ldb, err := getDB()
+	if err != nil {
+		return err
+	}
+
+	it, err := ldb.NewPrefixIterator(nil)
+	if err != nil {
+		return err
+	}
+
+	var elems []sizedElement
+	for it.Next() {
+		var ele sizedElement
+
+		key := it.Key()
+		switch key[0] {
+		case db.KeyTypeDevice:
+			folder := binary.BigEndian.Uint32(key[1:])
+			device := binary.BigEndian.Uint32(key[1+4:])
+			name := nulString(key[1+4+4:])
+			ele.key = fmt.Sprintf("DEVICE:%d:%d:%s", folder, device, name)
+
+		case db.KeyTypeGlobal:
+			folder := binary.BigEndian.Uint32(key[1:])
+			name := nulString(key[1+4:])
+			ele.key = fmt.Sprintf("GLOBAL:%d:%s", folder, name)
+
+		case db.KeyTypeBlock:
+			folder := binary.BigEndian.Uint32(key[1:])
+			hash := key[1+4 : 1+4+32]
+			name := nulString(key[1+4+32:])
+			ele.key = fmt.Sprintf("BLOCK:%d:%x:%s", folder, hash, name)
+
+		case db.KeyTypeDeviceStatistic:
+			ele.key = fmt.Sprintf("DEVICESTATS:%s", key[1:])
+
+		case db.KeyTypeFolderStatistic:
+			ele.key = fmt.Sprintf("FOLDERSTATS:%s", key[1:])
+
+		case db.KeyTypeVirtualMtime:
+			ele.key = fmt.Sprintf("MTIME:%s", key[1:])
+
+		case db.KeyTypeFolderIdx:
+			id := binary.BigEndian.Uint32(key[1:])
+			ele.key = fmt.Sprintf("FOLDERIDX:%d", id)
+
+		case db.KeyTypeDeviceIdx:
+			id := binary.BigEndian.Uint32(key[1:])
+			ele.key = fmt.Sprintf("DEVICEIDX:%d", id)
+
+		default:
+			ele.key = fmt.Sprintf("UNKNOWN:%x", key)
+		}
+		ele.size = len(it.Value())
+		elems = append(elems, ele)
+	}
+
+	slices.SortFunc(elems, func(a, b sizedElement) int {
+		return cmp.Compare(b.size, a.size)
+	})
+	for _, ele := range elems {
+		fmt.Println(ele.key, ele.size)
+	}
+
+	return nil
+}
@@ -0,0 +1,435 @@
+// Copyright (C) 2018 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"bytes"
+	"cmp"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"slices"
+
+	"google.golang.org/protobuf/proto"
+
+	"github.com/syncthing/syncthing/internal/gen/bep"
+	"github.com/syncthing/syncthing/internal/gen/dbproto"
+	"github.com/syncthing/syncthing/lib/db"
+	"github.com/syncthing/syncthing/lib/protocol"
+)
+
+type fileInfoKey struct {
+	folder uint32
+	device uint32
+	name   string
+}
+
+type globalKey struct {
+	folder uint32
+	name   string
+}
+
+type sequenceKey struct {
+	folder   uint32
+	sequence uint64
+}
+
+func indexCheck() (err error) {
+	ldb, err := getDB()
+	if err != nil {
+		return err
+	}
+
+	folders := make(map[uint32]string)
+	devices := make(map[uint32]string)
+	deviceToIDs := make(map[string]uint32)
+	fileInfos := make(map[fileInfoKey]*bep.FileInfo)
+	globals := make(map[globalKey]*dbproto.VersionList)
+	sequences := make(map[sequenceKey]string)
+	needs := make(map[globalKey]struct{})
+	blocklists := make(map[string]struct{})
+	versions := make(map[string]*bep.Vector)
+	usedBlocklists := make(map[string]struct{})
+	usedVersions := make(map[string]struct{})
+	var localDeviceKey uint32
+	success := true
+	defer func() {
+		if err == nil {
+			if success {
+				fmt.Println("Index check completed successfully.")
+			} else {
+				err = errors.New("Inconsistencies found in the index")
+			}
+		}
+	}()
+
+	it, err := ldb.NewPrefixIterator(nil)
+	if err != nil {
+		return err
+	}
+	for it.Next() {
+		key := it.Key()
+		switch key[0] {
+		case db.KeyTypeDevice:
+			folder := binary.BigEndian.Uint32(key[1:])
+			device := binary.BigEndian.Uint32(key[1+4:])
+			name := nulString(key[1+4+4:])
+
+			var f bep.FileInfo
+			err := proto.Unmarshal(it.Value(), &f)
+			if err != nil {
+				fmt.Println("Unable to unmarshal FileInfo:", err)
+				success = false
+				continue
+			}
+
+			fileInfos[fileInfoKey{folder, device, name}] = &f
+
+		case db.KeyTypeGlobal:
+			folder := binary.BigEndian.Uint32(key[1:])
+			name := nulString(key[1+4:])
+			var flv dbproto.VersionList
+			if err := proto.Unmarshal(it.Value(), &flv); err != nil {
+				fmt.Println("Unable to unmarshal VersionList:", err)
+				success = false
+				continue
+			}
+			globals[globalKey{folder, name}] = &flv
+
+		case db.KeyTypeFolderIdx:
+			key := binary.BigEndian.Uint32(it.Key()[1:])
+			folders[key] = string(it.Value())
+
+		case db.KeyTypeDeviceIdx:
+			key := binary.BigEndian.Uint32(it.Key()[1:])
+			devices[key] = string(it.Value())
+			deviceToIDs[string(it.Value())] = key
+			if bytes.Equal(it.Value(), protocol.LocalDeviceID[:]) {
+				localDeviceKey = key
+			}
+
+		case db.KeyTypeSequence:
+			folder := binary.BigEndian.Uint32(key[1:])
+			seq := binary.BigEndian.Uint64(key[5:])
+			val := it.Value()
+			sequences[sequenceKey{folder, seq}] = string(val[9:])
+
+		case db.KeyTypeNeed:
+			folder := binary.BigEndian.Uint32(key[1:])
+			name := nulString(key[1+4:])
+			needs[globalKey{folder, name}] = struct{}{}
+
+		case db.KeyTypeBlockList:
+			hash := string(key[1:])
+			blocklists[hash] = struct{}{}
+
+		case db.KeyTypeVersion:
+			hash := string(key[1:])
+			var v bep.Vector
+			if err := proto.Unmarshal(it.Value(), &v); err != nil {
+				fmt.Println("Unable to unmarshal Vector:", err)
+				success = false
+				continue
+			}
+			versions[hash] = &v
+		}
+	}
+
+	if localDeviceKey == 0 {
+		fmt.Println("Missing key for local device in device index (bailing out)")
+		success = false
+		return
+	}
+
+	var missingSeq []sequenceKey
+	for fk, fi := range fileInfos {
+		if fk.name != fi.Name {
+			fmt.Printf("Mismatching FileInfo name, %q (key) != %q (actual)\n", fk.name, fi.Name)
+			success = false
+		}
+
+		folder := folders[fk.folder]
+		if folder == "" {
+			fmt.Printf("Unknown folder ID %d for FileInfo %q\n", fk.folder, fk.name)
+			success = false
+			continue
+		}
+		if devices[fk.device] == "" {
+			fmt.Printf("Unknown device ID %d for FileInfo %q, folder %q\n", fk.folder, fk.name, folder)
+			success = false
+		}
+
+		if fk.device == localDeviceKey {
+			sk := sequenceKey{fk.folder, uint64(fi.Sequence)}
+			name, ok := sequences[sk]
+			if !ok {
+				fmt.Printf("Sequence entry missing for FileInfo %q, folder %q, seq %d\n", fi.Name, folder, fi.Sequence)
+				missingSeq = append(missingSeq, sk)
+				success = false
+				continue
+			}
+			if name != fi.Name {
+				fmt.Printf("Sequence entry refers to wrong name, %q (seq) != %q (FileInfo), folder %q, seq %d\n", name, fi.Name, folder, fi.Sequence)
+				success = false
+			}
+		}
+
+		if len(fi.Blocks) == 0 && len(fi.BlocksHash) != 0 {
+			key := string(fi.BlocksHash)
+			if _, ok := blocklists[key]; !ok {
+				fmt.Printf("Missing block list for file %q, block list hash %x\n", fi.Name, fi.BlocksHash)
+				success = false
+			} else {
+				usedBlocklists[key] = struct{}{}
+			}
+		}
+
+		if fi.VersionHash != nil {
+			key := string(fi.VersionHash)
+			if _, ok := versions[key]; !ok {
+				fmt.Printf("Missing version vector for file %q, version hash %x\n", fi.Name, fi.VersionHash)
+				success = false
+			} else {
+				usedVersions[key] = struct{}{}
+			}
+		}
+
+		_, ok := globals[globalKey{fk.folder, fk.name}]
+		if !ok {
+			fmt.Printf("Missing global for file %q\n", fi.Name)
+			success = false
+			continue
+		}
+	}
+
+	// Aggregate the ranges of missing sequence entries, print them
+
+	slices.SortFunc(missingSeq, func(a, b sequenceKey) int {
+		if a.folder != b.folder {
+			return cmp.Compare(a.folder, b.folder)
+		}
+		return cmp.Compare(a.sequence, b.sequence)
+	})
+
+	var folder uint32
+	var startSeq, prevSeq uint64
+	for _, sk := range missingSeq {
+		if folder != sk.folder || sk.sequence != prevSeq+1 {
+			if folder != 0 {
+				fmt.Printf("Folder %d missing %d sequence entries: #%d - #%d\n", folder, prevSeq-startSeq+1, startSeq, prevSeq)
+			}
+			startSeq = sk.sequence
+			folder = sk.folder
+		}
+		prevSeq = sk.sequence
+	}
+	if folder != 0 {
+		fmt.Printf("Folder %d missing %d sequence entries: #%d - #%d\n", folder, prevSeq-startSeq+1, startSeq, prevSeq)
+	}
+
+	for gk, vl := range globals {
+		folder := folders[gk.folder]
+		if folder == "" {
+			fmt.Printf("Unknown folder ID %d for VersionList %q\n", gk.folder, gk.name)
+			success = false
+		}
+		checkGlobal := func(i int, device []byte, version protocol.Vector, invalid, deleted bool) {
+			dev, ok := deviceToIDs[string(device)]
+			if !ok {
+				fmt.Printf("VersionList %q, folder %q refers to unknown device %q\n", gk.name, folder, device)
+				success = false
+			}
+			fi, ok := fileInfos[fileInfoKey{gk.folder, dev, gk.name}]
+			if !ok {
+				fmt.Printf("VersionList %q, folder %q, entry %d refers to unknown FileInfo\n", gk.name, folder, i)
+				success = false
+			}
+
+			fiv := fi.Version
+			if fi.VersionHash != nil {
+				fiv = versions[string(fi.VersionHash)]
+			}
+			if !protocol.VectorFromWire(fiv).Equal(version) {
+				fmt.Printf("VersionList %q, folder %q, entry %d, FileInfo version mismatch, %v (VersionList) != %v (FileInfo)\n", gk.name, folder, i, version, fi.Version)
+				success = false
+			}
+			ffi := protocol.FileInfoFromDB(fi)
+			if ffi.IsInvalid() != invalid {
+				fmt.Printf("VersionList %q, folder %q, entry %d, FileInfo invalid mismatch, %v (VersionList) != %v (FileInfo)\n", gk.name, folder, i, invalid, ffi.IsInvalid())
+				success = false
+			}
+			if ffi.IsDeleted() != deleted {
+				fmt.Printf("VersionList %q, folder %q, entry %d, FileInfo deleted mismatch, %v (VersionList) != %v (FileInfo)\n", gk.name, folder, i, deleted, ffi.IsDeleted())
+				success = false
+			}
+		}
+		for i, fv := range vl.Versions {
+			ver := protocol.VectorFromWire(fv.Version)
+			for _, device := range fv.Devices {
+				checkGlobal(i, device, ver, false, fv.Deleted)
+			}
+			for _, device := range fv.InvalidDevices {
+				checkGlobal(i, device, ver, true, fv.Deleted)
+			}
+		}
+
+		// If we need this file we should have a need entry for it. False
+		// positives from needsLocally for deleted files, where we might
+		// legitimately lack an entry if we never had it, and ignored files.
+		if needsLocally(vl) {
+			_, ok := needs[gk]
+			if !ok {
+				fv, _ := vlGetGlobal(vl)
+				devB, _ := fvFirstDevice(fv)
+				dev := deviceToIDs[string(devB)]
+				fi := protocol.FileInfoFromDB(fileInfos[fileInfoKey{gk.folder, dev, gk.name}])
+				if !fi.IsDeleted() && !fi.IsIgnored() {
+					fmt.Printf("Missing need entry for needed file %q, folder %q\n", gk.name, folder)
+				}
+			}
+		}
+	}
+
+	seenSeq := make(map[fileInfoKey]uint64)
+	for sk, name := range sequences {
+		folder := folders[sk.folder]
+		if folder == "" {
+			fmt.Printf("Unknown folder ID %d for sequence entry %d, %q\n", sk.folder, sk.sequence, name)
+			success = false
+			continue
+		}
+
+		if prev, ok := seenSeq[fileInfoKey{folder: sk.folder, name: name}]; ok {
+			fmt.Printf("Duplicate sequence entry for %q, folder %q, seq %d (prev %d)\n", name, folder, sk.sequence, prev)
+			success = false
+		}
+		seenSeq[fileInfoKey{folder: sk.folder, name: name}] = sk.sequence
+
+		fi, ok := fileInfos[fileInfoKey{sk.folder, localDeviceKey, name}]
+		if !ok {
+			fmt.Printf("Missing FileInfo for sequence entry %d, folder %q, %q\n", sk.sequence, folder, name)
+			success = false
+			continue
+		}
+		if fi.Sequence != int64(sk.sequence) {
+			fmt.Printf("Sequence mismatch for %q, folder %q, %d (key) != %d (FileInfo)\n", name, folder, sk.sequence, fi.Sequence)
+			success = false
+		}
+	}
+
+	for nk := range needs {
+		folder := folders[nk.folder]
+		if folder == "" {
+			fmt.Printf("Unknown folder ID %d for need entry %q\n", nk.folder, nk.name)
+			success = false
+			continue
+		}
+
+		vl, ok := globals[nk]
+		if !ok {
+			fmt.Printf("Missing global for need entry %q, folder %q\n", nk.name, folder)
+			success = false
+			continue
+		}
+
+		if !needsLocally(vl) {
+			fmt.Printf("Need entry for file we don't need, %q, folder %q\n", nk.name, folder)
+			success = false
+		}
+	}
+
+	if d := len(blocklists) - len(usedBlocklists); d > 0 {
+		fmt.Printf("%d block list entries out of %d needs GC\n", d, len(blocklists))
+	}
+	if d := len(versions) - len(usedVersions); d > 0 {
+		fmt.Printf("%d version entries out of %d needs GC\n", d, len(versions))
+	}
+
+	return nil
+}
+
+func needsLocally(vl *dbproto.VersionList) bool {
+	gfv, gok := vlGetGlobal(vl)
+	if !gok { // That's weird, but we hardly need something non-existent
+		return false
+	}
+	fv, ok := vlGet(vl, protocol.LocalDeviceID[:])
+	return db.Need(gfv, ok, protocol.VectorFromWire(fv.Version))
+}
+
+// Get returns a FileVersion that contains the given device and whether it has
+// been found at all.
+func vlGet(vl *dbproto.VersionList, device []byte) (*dbproto.FileVersion, bool) {
+	_, i, _, ok := vlFindDevice(vl, device)
+	if !ok {
+		return &dbproto.FileVersion{}, false
+	}
+	return vl.Versions[i], true
+}
+
+// GetGlobal returns the current global FileVersion. The returned FileVersion
+// may be invalid, if all FileVersions are invalid. Returns false only if
+// VersionList is empty.
+func vlGetGlobal(vl *dbproto.VersionList) (*dbproto.FileVersion, bool) {
+	i := vlFindGlobal(vl)
+	if i == -1 {
+		return nil, false
+	}
+	return vl.Versions[i], true
+}
+
+// findGlobal returns the first version that isn't invalid, or if all versions are
+// invalid just the first version (i.e. 0) or -1, if there's no versions at all.
+func vlFindGlobal(vl *dbproto.VersionList) int {
+	for i := range vl.Versions {
+		if !fvIsInvalid(vl.Versions[i]) {
+			return i
+		}
+	}
+	if len(vl.Versions) == 0 {
+		return -1
+	}
+	return 0
+}
+
+// findDevice returns whether the device is in InvalidVersions or Versions and
+// in InvalidDevices or Devices (true for invalid), the positions in the version
+// and device slices and whether it has been found at all.
+func vlFindDevice(vl *dbproto.VersionList, device []byte) (bool, int, int, bool) {
+	for i, v := range vl.Versions {
+		if j := deviceIndex(v.Devices, device); j != -1 {
+			return false, i, j, true
+		}
+		if j := deviceIndex(v.InvalidDevices, device); j != -1 {
+			return true, i, j, true
+		}
+	}
+	return false, -1, -1, false
+}
+
+func deviceIndex(devices [][]byte, device []byte) int {
+	for i, dev := range devices {
+		if bytes.Equal(device, dev) {
+			return i
+		}
+	}
+	return -1
+}
+
+func fvFirstDevice(fv *dbproto.FileVersion) ([]byte, bool) {
+	if len(fv.Devices) != 0 {
+		return fv.Devices[0], true
+	}
+	if len(fv.InvalidDevices) != 0 {
+		return fv.InvalidDevices[0], true
+	}
+	return nil, false
+}
+
+func fvIsInvalid(fv *dbproto.FileVersion) bool {
+	return fv == nil || len(fv.Devices) == 0
+}
@@ -14,12 +14,15 @@ import (
 	"github.com/alecthomas/kong"
 	"github.com/kballard/go-shellquote"

+	"github.com/syncthing/syncthing/cmd/syncthing/cmdutil"
 	"github.com/syncthing/syncthing/lib/config"
 )

 type CLI struct {
-	GUIAddress string `name:"gui-address" env:"STGUIADDRESS"`
-	GUIAPIKey  string `name:"gui-apikey" env:"STGUIAPIKEY"`
+	cmdutil.CommonOptions
+	DataDir    string `name:"data" placeholder:"PATH" env:"STDATADIR" help:"Set data directory (database and logs)"`
+	GUIAddress string `name:"gui-address"`
+	GUIAPIKey  string `name:"gui-apikey"`

 	Show       showCommand      `cmd:"" help:"Show command group"`
 	Debug      debugCommand     `cmd:"" help:"Debug command group"`
@@ -34,6 +37,11 @@ type Context struct {
 }

 func (cli CLI) AfterApply(kongCtx *kong.Context) error {
+	err := cmdutil.SetConfigDataLocationsFromFlags(cli.HomeDir, cli.ConfDir, cli.DataDir)
+	if err != nil {
+		return fmt.Errorf("command line options: %w", err)
+	}
+
 	clientFactory := &apiClientFactory{
 		cfg: config.GUIConfiguration{
 			RawAddress: cli.GUIAddress,
@@ -10,7 +10,6 @@ import (
 	"bufio"
 	"errors"
 	"fmt"
-	"net/http"
 	"path/filepath"

 	"github.com/alecthomas/kong"
@@ -64,7 +63,7 @@ func (f *folderOverrideCommand) Run(ctx Context) error {
 			if err != nil {
 				return err
 			}
-			if response.StatusCode != http.StatusOK {
+			if response.StatusCode != 200 {
 				errStr := fmt.Sprint("Failed to override changes\nStatus code: ", response.StatusCode)
 				bytes, err := responseToBArray(response)
 				if err != nil {
@@ -17,6 +17,8 @@ import (
 	"path/filepath"

 	"github.com/syncthing/syncthing/lib/config"
+	"github.com/syncthing/syncthing/lib/db/backend"
+	"github.com/syncthing/syncthing/lib/locations"
 )

 func responseToBArray(response *http.Response) ([]byte, error) {
@@ -112,7 +114,7 @@ func getConfig(c APIClient) (config.Configuration, error) {
 	return cfg, nil
 }

-func prettyPrintJSON(data any) error {
+func prettyPrintJSON(data interface{}) error {
 	enc := json.NewEncoder(os.Stdout)
 	enc.SetIndent("", "  ")
 	return enc.Encode(data)
@@ -123,7 +125,7 @@ func prettyPrintResponse(response *http.Response) error {
 	if err != nil {
 		return err
 	}
-	var data any
+	var data interface{}
 	if err := json.Unmarshal(bytes, &data); err != nil {
 		return err
 	}
@@ -131,6 +133,19 @@ func prettyPrintResponse(response *http.Response) error {
 	return prettyPrintJSON(data)
 }

+func getDB() (backend.Backend, error) {
+	return backend.OpenLevelDBRO(locations.Get(locations.Database))
+}
+
+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))
 }
@@ -0,0 +1,16 @@
+// Copyright (C) 2021 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cmdutil
+
+// CommonOptions are reused among several subcommands
+type CommonOptions struct {
+	buildCommonOptions
+	ConfDir         string `name:"config" placeholder:"PATH" env:"STCONFDIR" help:"Set configuration directory (config and keys)"`
+	HomeDir         string `name:"home" placeholder:"PATH" env:"STHOMEDIR" help:"Set configuration and data directory"`
+	NoDefaultFolder bool   `env:"STNODEFAULTFOLDER" help:"Don't create the \"default\" folder on first startup"`
+	SkipPortProbing bool   `help:"Don't try to find free ports for GUI and listen addresses on first startup"`
+}
@@ -5,9 +5,10 @@
 // You can obtain one at https://mozilla.org/MPL/2.0/.

 //go:build !windows
+// +build !windows

-package main
+package cmdutil

-type buildSpecificOptions struct {
+type buildCommonOptions struct {
 	HideConsole bool `hidden:""`
 }
@@ -4,8 +4,8 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

-package main
+package cmdutil

-type buildSpecificOptions struct {
-	HideConsole bool `name:"no-console" help:"Hide console window (Always enabled on Windows 11 24H2 and later)" env:"STHIDECONSOLE"`
+type buildCommonOptions struct {
+	HideConsole bool `name:"no-console" help:"Hide console window"`
 }
@@ -0,0 +1,35 @@
+// Copyright (C) 2014 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cmdutil
+
+import (
+	"errors"
+
+	"github.com/syncthing/syncthing/lib/locations"
+)
+
+func SetConfigDataLocationsFromFlags(homeDir, confDir, dataDir string) error {
+	homeSet := homeDir != ""
+	confSet := confDir != ""
+	dataSet := dataDir != ""
+	switch {
+	case dataSet != confSet:
+		return errors.New("either both or none of --config and --data must be given, use --home to set both at once")
+	case homeSet && dataSet:
+		return errors.New("--home must not be used together with --config and --data")
+	case homeSet:
+		confDir = homeDir
+		dataDir = homeDir
+		fallthrough
+	case dataSet:
+		if err := locations.SetBaseDir(locations.ConfigBaseDir, confDir); err != nil {
+			return err
+		}
+		return locations.SetBaseDir(locations.DataBaseDir, dataDir)
+	}
+	return nil
+}
@@ -11,15 +11,12 @@ import (
 	"context"
 	"crypto/sha256"
 	"fmt"
-	"log/slog"
 	"net/http"
 	"os"
 	"path/filepath"
 	"slices"
 	"strings"
 	"time"
-
-	"github.com/syncthing/syncthing/internal/slogutil"
 )

 const (
@@ -31,12 +28,12 @@ const (
 // directory to the crash reporting server as urlBase. Uploads are attempted
 // with the newest log first.
 //
-// This can block for a long time. The context can set a final deadline
+// This can 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 {
-		slog.ErrorContext(ctx, "Failed to list panic logs", slogutil.Error(err))
+		l.Warnln("Failed to list panic logs:", err)
 		return
 	}

@@ -51,7 +48,7 @@ func uploadPanicLogs(ctx context.Context, urlBase, dir string) {
 		}

 		if err := uploadPanicLog(ctx, urlBase, file); err != nil {
-			slog.ErrorContext(ctx, "Reporting crash", slogutil.Error(err))
+			l.Warnln("Reporting crash:", 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.
@@ -74,7 +71,7 @@ func uploadPanicLog(ctx context.Context, urlBase, file string) error {
 	data = filterLogLines(data)

 	hash := fmt.Sprintf("%x", sha256.Sum256(data))
-	slog.InfoContext(ctx, "Reporting crash", slogutil.FilePath(filepath.Base(file)), slog.String("id", hash[:8]))
+	l.Infof("Reporting crash found in %s (report ID %s) ...\n", filepath.Base(file), hash[:8])

 	url := fmt.Sprintf("%s/%s", urlBase, hash)
 	headReq, err := http.NewRequest(http.MethodHead, url, nil)
@@ -125,7 +122,7 @@ func uploadPanicLog(ctx context.Context, urlBase, file string) error {
 func filterLogLines(data []byte) []byte {
 	filtered := data[:0]
 	matched := false
-	for line := range bytes.SplitSeq(data, []byte("\n")) {
+	for _, line := range bytes.Split(data, []byte("\n")) {
 		switch {
 		case !matched && bytes.HasPrefix(line, []byte("Panic ")):
 			// This begins the panic trace, set the matched flag and append.
@@ -6,6 +6,8 @@

 package main

-import "github.com/syncthing/syncthing/internal/slogutil"
+import (
+	"github.com/syncthing/syncthing/lib/logger"
+)

-func init() { slogutil.RegisterPackage("Main package") }
+var l = logger.DefaultLogger.NewFacility("main", "Main package")
@@ -167,7 +167,7 @@ func (c *CLI) process(srcFs fs.Filesystem, dstFs fs.Filesystem, path string) err

 	var plainFd fs.File
 	if dstFs != nil {
-		if err := dstFs.MkdirAll(filepath.Dir(plainFi.Name), fs.ModePerm); err != nil {
+		if err := dstFs.MkdirAll(filepath.Dir(plainFi.Name), 0o700); err != nil {
 			return fmt.Errorf("%s: %w", plainFi.Name, err)
 		}

@@ -238,7 +238,7 @@ func (c *CLI) decryptFile(encFi *protocol.FileInfo, plainFi *protocol.FileInfo,
 		}

 		// Verify the hash against the plaintext block info
-		if !scanner.Validate(dec, plainBlock.Hash) {
+		if !scanner.Validate(dec, plainBlock.Hash, 0) {
 			// The block decrypted correctly but fails the hash check. This
 			// is odd and unexpected, but it it's still a valid block from
 			// the source. The file might have changed while we pulled it?
@@ -11,25 +11,42 @@ import (
 	"bufio"
 	"context"
 	"crypto/tls"
+	"errors"
 	"fmt"
-	"log/slog"
 	"os"

+	"github.com/syncthing/syncthing/cmd/syncthing/cmdutil"
 	"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/osutil"
 	"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)"`
-	NoPortProbing bool   `help:"Don't try to find free ports for GUI and listen addresses on first startup" env:"STNOPORTPROBING"`
+	cmdutil.CommonOptions
+	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)"`
 }

-func (c *CLI) Run() error {
+func (c *CLI) Run(l logger.Logger) error {
+	if c.HideConsole {
+		osutil.HideConsole()
+	}
+
+	if c.HomeDir != "" {
+		if c.ConfDir != "" {
+			return errors.New("--home must not be used together with --config")
+		}
+		c.ConfDir = c.HomeDir
+	}
+	if c.ConfDir == "" {
+		c.ConfDir = locations.GetBaseDir(locations.ConfigBaseDir)
+	}
+
 	// Support reading the password from a pipe or similar
 	if c.GUIPassword == "-" {
 		reader := bufio.NewReader(os.Stdin)
@@ -40,13 +57,13 @@ func (c *CLI) Run() error {
 		c.GUIPassword = string(password)
 	}

-	if err := Generate(locations.GetBaseDir(locations.ConfigBaseDir), c.GUIUser, c.GUIPassword, c.NoPortProbing); err != nil {
+	if err := Generate(l, c.ConfDir, c.GUIUser, c.GUIPassword, c.NoDefaultFolder, c.SkipPortProbing); err != nil {
 		return fmt.Errorf("failed to generate config and keys: %w", err)
 	}
 	return nil
 }

-func Generate(confDir, guiUser, guiPassword string, skipPortProbing bool) error {
+func Generate(l logger.Logger, confDir, guiUser, guiPassword string, noDefaultFolder, skipPortProbing bool) error {
 	dir, err := fs.ExpandTilde(confDir)
 	if err != nil {
 		return err
@@ -61,21 +78,20 @@ func Generate(confDir, guiUser, guiPassword string, skipPortProbing bool) error
 	certFile, keyFile := locations.Get(locations.CertFile), locations.Get(locations.KeyFile)
 	cert, err := tls.LoadX509KeyPair(certFile, keyFile)
 	if err == nil {
-		slog.Warn("Key exists; will not overwrite")
+		l.Warnln("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])
-	slog.Info("Calculated device ID", slog.String("device", myID.String()))
+	l.Infoln("Device ID:", myID)

 	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, skipPortProbing); err != nil {
+		if cfg, err = syncthing.DefaultConfig(cfgFile, myID, events.NoopLogger, noDefaultFolder, skipPortProbing); err != nil {
 			return fmt.Errorf("create config: %w", err)
 		}
 	} else if err != nil {
@@ -88,7 +104,7 @@ func Generate(confDir, guiUser, guiPassword string, skipPortProbing bool) error

 	var updateErr error
 	waiter, err := cfg.Modify(func(cfg *config.Configuration) {
-		updateErr = updateGUIAuthentication(&cfg.GUI, guiUser, guiPassword)
+		updateErr = updateGUIAuthentication(l, &cfg.GUI, guiUser, guiPassword)
 	})
 	if err != nil {
 		return fmt.Errorf("modify config: %w", err)
@@ -104,17 +120,17 @@ func Generate(confDir, guiUser, guiPassword string, skipPortProbing bool) error
 	return nil
 }

-func updateGUIAuthentication(guiCfg *config.GUIConfiguration, guiUser, guiPassword string) error {
+func updateGUIAuthentication(l logger.Logger, guiCfg *config.GUIConfiguration, guiUser, guiPassword string) error {
 	if guiUser != "" && guiCfg.User != guiUser {
 		guiCfg.User = guiUser
-		slog.Info("Updated GUI authentication user", "name", guiUser)
+		l.Infoln("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)
 		}
-		slog.Info("Updated GUI authentication password")
+		l.Infoln("Updated GUI authentication password.")
 	}
 	return nil
 }
@@ -8,21 +8,18 @@ package main

 import (
 	"fmt"
-	"log/slog"
 	"os"
 	"runtime"
 	"runtime/pprof"
 	"syscall"
 	"time"
-
-	"github.com/syncthing/syncthing/internal/slogutil"
 )

 func startHeapProfiler() {
-	slog.Debug("Starting heap profiling")
+	l.Debugln("Starting heap profiling")
 	go func() {
 		err := saveHeapProfiles(1) // Only returns on error
-		slog.Error("Heap profiler failed", slogutil.Error(err))
+		l.Warnln("Heap profiler failed:", err)
 		panic("Heap profiler failed")
 	}()
 }
@@ -9,31 +9,28 @@ 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.Mutex
+	stdoutMut        = sync.NewMutex()
 )

 const (
@@ -46,7 +43,9 @@ const (
 	panicUploadNoticeWait = 10 * time.Second
 )

-func (c *serveCmd) monitorMain() {
+func monitorMain(options serveOptions) {
+	l.SetPrefix("[monitor] ")
+
 	var dst io.Writer = os.Stdout

 	logFile := locations.Get(locations.LogFile)
@@ -59,13 +58,13 @@ func (c *serveCmd) monitorMain() {
 		open := func(name string) (io.WriteCloser, error) {
 			return newAutoclosedFile(name, logFileAutoCloseDelay, logFileMaxOpenTime)
 		}
-		if c.LogMaxSize > 0 {
-			fileDst, err = newRotatedFile(logFile, open, int64(c.LogMaxSize), c.LogMaxFiles)
+		if options.LogMaxSize > 0 {
+			fileDst, err = newRotatedFile(logFile, open, int64(options.LogMaxSize), options.LogMaxFiles)
 		} else {
 			fileDst, err = open(logFile)
 		}
 		if err != nil {
-			slog.Error("Failed to set up logging to file, proceeding with logging to stdout only", slogutil.Error(err))
+			l.Warnln("Failed to set up logging to file, proceeding with logging to stdout only:", err)
 		} else {
 			if build.IsWindows {
 				// Translate line breaks to Windows standard
@@ -79,14 +78,14 @@ func (c *serveCmd) monitorMain() {
 			// Log to both stdout and file.
 			dst = io.MultiWriter(dst, fileDst)

-			slog.Info("Saved log output", slogutil.FilePath(logFile))
+			l.Infof(`Log output saved to file "%s"`, logFile)
 		}
 	}

 	args := os.Args
 	binary, err := getBinary(args[0])
 	if err != nil {
-		slog.Error("Failed to start the main Syncthing process", slogutil.Error(err))
+		l.Warnln("Error starting the main Syncthing process:", err)
 		panic("Error starting the main Syncthing process")
 	}
 	var restarts [restartCounts]time.Time
@@ -103,7 +102,7 @@ func (c *serveCmd) monitorMain() {
 		maybeReportPanics()

 		if t := time.Since(restarts[0]); t < restartLoopThreshold {
-			slog.Error("Too many restarts; not retrying further", slog.Int("count", restartCounts), slog.Any("interval", t))
+			l.Warnf("%d restarts in %v; not retrying further", restartCounts, t)
 			os.Exit(svcutil.ExitError.AsInt())
 		}

@@ -123,10 +122,10 @@ func (c *serveCmd) monitorMain() {
 			panic(err)
 		}

-		slog.Debug("Starting syncthing")
+		l.Debugln("Starting syncthing")
 		err = cmd.Start()
 		if err != nil {
-			slog.Error("Failed to start the main Syncthing process", slogutil.Error(err))
+			l.Warnln("Error starting the main Syncthing process:", err)
 			panic("Error starting the main Syncthing process")
 		}

@@ -135,10 +134,19 @@ func (c *serveCmd) monitorMain() {
 		stdoutLastLines = make([]string, 0, 50)
 		stdoutMut.Unlock()

-		var wg sync.WaitGroup
+		wg := sync.NewWaitGroup()

-		wg.Go(func() { copyStderr(stderr, dst) })
-		wg.Go(func() { copyStdout(stdout, dst) })
+		wg.Add(1)
+		go func() {
+			copyStderr(stderr, dst)
+			wg.Done()
+		}()
+
+		wg.Add(1)
+		go func() {
+			copyStdout(stdout, dst)
+			wg.Done()
+		}()

 		exit := make(chan error)

@@ -150,13 +158,13 @@ func (c *serveCmd) monitorMain() {
 		stopped := false
 		select {
 		case s := <-stopSign:
-			slog.Info("Received signal; exiting", "signal", s)
+			l.Infof("Signal %d received; exiting", s)
 			cmd.Process.Signal(sigTerm)
 			err = <-exit
 			stopped = true

 		case s := <-restartSign:
-			slog.Info("Received signal; restarting", "signal", s)
+			l.Infof("Signal %d received; restarting", s)
 			cmd.Process.Signal(sigHup)
 			err = <-exit

@@ -168,33 +176,27 @@ func (c *serveCmd) monitorMain() {
 			os.Exit(svcutil.ExitSuccess.AsInt())
 		}

-		exiterr := &exec.ExitError{}
-		if errors.As(err, &exiterr) {
+		if exiterr, ok := err.(*exec.ExitError); ok {
 			exitCode := exiterr.ExitCode()
-			switch {
-			case stopped || c.NoRestart:
+			if stopped || options.NoRestart {
 				os.Exit(exitCode)
-
-			case exitCode == svcutil.ExitUpgrade.AsInt():
+			}
+			if exitCode == svcutil.ExitUpgrade.AsInt() {
 				// Restart the monitor process to release the .old
 				// binary as part of the upgrade process.
-				slog.Info("Restarting monitor...")
+				l.Infoln("Restarting monitor...")
 				if err = restartMonitor(binary, args); err != nil {
-					slog.Error("Failed to restart monitor", slogutil.Error(err))
+					l.Warnln("Restart:", err)
 				}
 				os.Exit(exitCode)
-
-			case exitCode == svcutil.ExitNoRestart.AsInt():
-				// Requested to not restart the child
-				os.Exit(exitCode)
 			}
 		}

-		if c.NoRestart {
+		if options.NoRestart {
 			os.Exit(svcutil.ExitError.AsInt())
 		}

-		slog.Info("Syncthing exited", slogutil.Error(err))
+		l.Infoln("Syncthing exited:", err)
 		time.Sleep(restartPause)

 		if first {
@@ -238,16 +240,32 @@ func copyStderr(stderr io.Reader, dst io.Writer) {

 		dst.Write([]byte(line))

-		if panicFd == nil && (strings.HasPrefix(line, "panic:") || strings.HasPrefix(line, "fatal error:") || strings.HasPrefix(line, "runtime:")) {
+		if panicFd == nil && (strings.HasPrefix(line, "panic:") || strings.HasPrefix(line, "fatal error:")) {
 			panicFd, err = os.Create(locations.GetTimestamped(locations.PanicLog))
 			if err != nil {
-				slog.Error("Failed to create panic log", slogutil.Error(err))
+				l.Warnln("Create panic log:", 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")
+			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 {
@@ -428,6 +446,7 @@ 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),
 	}
@@ -484,7 +503,7 @@ func (f *autoclosedFile) ensureOpenLocked() error {
 	// We open the file for write only, and create it if it doesn't exist.
 	flags := os.O_WRONLY | os.O_CREATE | os.O_APPEND

-	fd, err := os.OpenFile(f.name, flags, 0o666)
+	fd, err := os.OpenFile(f.name, flags, 0o644)
 	if err != nil {
 		return err
 	}
@@ -535,7 +554,7 @@ func maybeReportPanics() {
 	// Try to get a config to see if/where panics should be reported.
 	cfg, err := loadOrDefaultConfig()
 	if err != nil {
-		slog.Error("Couldn't load config; not reporting crash")
+		l.Warnln("Couldn't load config; not reporting crash")
 		return
 	}

@@ -555,7 +574,7 @@ func maybeReportPanics() {
 		case <-ctx.Done():
 			return
 		case <-time.After(panicUploadNoticeWait):
-			slog.Warn("Uploading crash reports is taking a while, please wait")
+			l.Warnln("Uploading crash reports is taking a while, please wait...")
 		}
 	}()

@@ -5,6 +5,7 @@
 // You can obtain one at https://mozilla.org/MPL/2.0/.

 //go:build !windows
+// +build !windows

 package main

@@ -5,30 +5,12 @@
 // You can obtain one at https://mozilla.org/MPL/2.0/.

 //go:build windows
+// +build windows

 package main

-import "golang.org/x/sys/windows"
+import "os/exec"

 func openURL(url string) error {
-	urlPtr, err := windows.UTF16PtrFromString(url)
-	if err != nil {
-		return err
-	}
-
-	verbPtr, err := windows.UTF16PtrFromString("open")
-	if err != nil {
-		return err
-	}
-
-	err = windows.ShellExecute(
-		0,       // hwnd
-		verbPtr, // operation
-		urlPtr,  // file
-		nil,     // parameters
-		nil,     // directory
-		windows.SW_SHOWNORMAL,
-	)
-
-	return err
+	return exec.Command("cmd.exe", "/C", "start "+url).Run()
 }
@@ -5,6 +5,7 @@
 // You can obtain one at https://mozilla.org/MPL/2.0/.

 //go:build !solaris && !windows
+// +build !solaris,!windows

 package main

@@ -15,82 +16,50 @@ import (
 	"syscall"
 	"time"

-	"github.com/syncthing/syncthing/internal/db"
-	"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"
 )

-func startPerfStats(db db.DB) {
-	go savePerfStats(fmt.Sprintf("perfstats-%d.csv", syscall.Getpid()), db)
+func startPerfStats() {
+	go savePerfStats(fmt.Sprintf("perfstats-%d.csv", syscall.Getpid()))
 }

-func savePerfStats(file string, db db.DB) {
+func savePerfStats(file string) {
 	fd, err := os.Create(file)
 	if err != nil {
 		panic(err)
 	}

-	var prevTime time.Time
-	var curRus, prevRus syscall.Rusage
-	var curMem, prevMem runtime.MemStats
+	var prevUsage int64
+	var prevTime int64
+	var rusage syscall.Rusage
+	var memstats runtime.MemStats
 	var prevIn, prevOut int64

 	t0 := time.Now()
-	syscall.Getrusage(syscall.RUSAGE_SELF, &prevRus)
-	runtime.ReadMemStats(&prevMem)
-
-	fmt.Fprintf(fd, "TIME_S\tCPU_S\tHEAP_KIB\tRSS_KIB\tNETIN_KBPS\tNETOUT_KBPS\tDBSIZE_KIB\tDBLOCAL\n")
-
 	for t := range time.NewTicker(250 * time.Millisecond).C {
-		syscall.Getrusage(syscall.RUSAGE_SELF, &curRus)
-		runtime.ReadMemStats(&curMem)
+		if err := syscall.Getrusage(syscall.RUSAGE_SELF, &rusage); err != nil {
+			continue
+		}
+
+		curTime := time.Now().UnixNano()
+		timeDiff := curTime - prevTime
+		curUsage := rusage.Utime.Nano() + rusage.Stime.Nano()
+		usageDiff := curUsage - prevUsage
+		cpuUsagePercent := 100 * float64(usageDiff) / float64(timeDiff)
+		prevTime = curTime
+		prevUsage = curUsage
 		in, out := protocol.TotalInOut()
-		timeDiff := t.Sub(prevTime)
-
-		rss := curRus.Maxrss
-		if build.IsDarwin {
-			rss /= 1024
+		var inRate, outRate float64
+		if timeDiff > 0 {
+			inRate = float64(in-prevIn) / (float64(timeDiff) / 1e9)    // bytes per second
+			outRate = float64(out-prevOut) / (float64(timeDiff) / 1e9) // bytes per second
 		}
-
-		folders, _ := db.ListFolders()
-		var dbLocal int
-		for _, f := range folders {
-			local, _ := db.CountLocal(f, protocol.LocalDeviceID)
-			dbLocal += local.Files + local.Directories + local.Symlinks
-		}
-
-		fmt.Fprintf(
-			fd, "%.03f\t%f\t%d\t%d\t%.0f\t%.0f\t%d\t%d\n",
-			t.Sub(t0).Seconds(),
-			rate(cpusec(&prevRus), cpusec(&curRus), timeDiff, 1),
-			(curMem.Sys-curMem.HeapReleased)/1024,
-			rss,
-			rate(prevIn, in, timeDiff, 1e3),
-			rate(prevOut, out, timeDiff, 1e3),
-			osutil.DirSize(locations.Get(locations.Database))/1024,
-			dbLocal,
-		)
-
-		prevTime = t
-		prevRus = curRus
-		prevMem = curMem
 		prevIn, prevOut = in, out
+
+		runtime.ReadMemStats(&memstats)
+
+		startms := int(t.Sub(t0).Seconds() * 1000)
+
+		fmt.Fprintf(fd, "%d\t%f\t%d\t%d\t%.0f\t%.0f\n", startms, cpuUsagePercent, memstats.Alloc, memstats.Sys-memstats.HeapReleased, inRate, outRate)
 	}
 }
-
-func cpusec(r *syscall.Rusage) float64 {
-	return float64(r.Utime.Nano()+r.Stime.Nano()) / float64(time.Second)
-}
-
-type number interface {
-	constraints.Float | constraints.Integer
-}
-
-func rate[T number](prev, cur T, d time.Duration, div float64) float64 {
-	diff := cur - prev
-	rate := float64(diff) / d.Seconds() / div
-	return rate
-}
@@ -5,10 +5,9 @@
 // You can obtain one at https://mozilla.org/MPL/2.0/.

 //go:build solaris || windows
+// +build solaris windows

 package main

-import "github.com/syncthing/syncthing/internal/db"
-
-func startPerfStats(_ db.DB) {
+func startPerfStats() {
 }
@@ -5,6 +5,7 @@
 // You can obtain one at https://mozilla.org/MPL/2.0/.

 //go:build go1.7
+// +build go1.7

 package main

@@ -32,17 +32,3 @@
    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"
-
@@ -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
+Exec=syncthing --browser-only
 Icon=syncthing
 Terminal=false
 Type=Application
@@ -7,215 +7,22 @@ StartLimitBurst=4

 [Service]
 User=%i
-Environment="STLOGFORMATTIMESTAMP="
-Environment="STLOGFORMATLEVELSTRING=false"
-Environment="STLOGFORMATLEVELSYSLOG=true"
-ExecStart=/usr/bin/syncthing serve --no-browser --no-restart
+ExecStart=/usr/bin/syncthing serve --no-browser --no-restart --logflags=0
 Restart=on-failure
 RestartSec=1
 SuccessExitStatus=3 4
 RestartForceExitStatus=3 4

-#############
-# 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.
-
-# Makes /usr, /boot, /efi and /etc read-only.
+# Hardening
 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.
+PrivateTmp=true
 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
+MemoryDenyWriteExecute=true
+NoNewPrivileges=true

-##################
-# 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).
+# Elevated permissions to sync ownership (disabled by default),
+# see https://docs.syncthing.net/advanced/folder-sync-ownership
 #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
@@ -5,10 +5,7 @@ StartLimitIntervalSec=60
 StartLimitBurst=4

 [Service]
-Environment="STLOGFORMATTIMESTAMP="
-Environment="STLOGFORMATLEVELSTRING=false"
-Environment="STLOGFORMATLEVELSYSLOG=true"
-ExecStart=/usr/bin/syncthing serve --no-browser --no-restart
+ExecStart=/usr/bin/syncthing serve --no-browser --no-restart --logflags=0
 Restart=on-failure
 RestartSec=1
 SuccessExitStatus=3 4
@@ -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
@@ -1,69 +1,72 @@
 module github.com/syncthing/syncthing

-go 1.25.0
+go 1.23.0

 require (
-	github.com/AudriusButkevicius/recli v0.0.7
-	github.com/alecthomas/kong v1.16.0
-	github.com/aws/aws-sdk-go v1.55.8
+	github.com/AudriusButkevicius/recli v0.0.7-0.20220911121932-d000ce8fbf0f
+	github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.6.1
+	github.com/alecthomas/kong v1.11.0
+	github.com/aws/aws-sdk-go v1.55.7
 	github.com/calmh/incontainer v1.0.0
 	github.com/calmh/xdr v1.2.0
-	github.com/ccding/go-stun v0.1.6
-	github.com/coreos/go-semver v0.3.1
+	github.com/ccding/go-stun v0.1.5
+	github.com/chmduquesne/rollinghash v4.0.0+incompatible
 	github.com/d4l3k/messagediff v1.2.1
 	github.com/getsentry/raven-go v0.2.0
-	github.com/go-ldap/ldap/v3 v3.4.14
+	github.com/go-ldap/ldap/v3 v3.4.11
 	github.com/gobwas/glob v0.2.3
-	github.com/gofrs/flock v0.13.0
+	github.com/gofrs/flock v0.12.1
+	github.com/greatroar/blobloom v0.8.0
 	github.com/hashicorp/golang-lru/v2 v2.0.7
-	github.com/jackpal/gateway v1.1.1
+	github.com/jackpal/gateway v1.0.16
 	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 v1.14.48
+	github.com/maxbrunsfeld/counterfeiter/v6 v6.11.2
 	github.com/maxmind/geoipupdate/v6 v6.1.0
 	github.com/miscreant/miscreant.go v0.0.0-20200214223636-26d376326b75
-	github.com/oschwald/geoip2-golang v1.13.0
-	github.com/pierrec/lz4/v4 v4.1.27
-	github.com/prometheus/client_golang v1.24.0
+	github.com/oschwald/geoip2-golang v1.11.0
+	github.com/pierrec/lz4/v4 v4.1.22
+	github.com/prometheus/client_golang v1.22.0
 	github.com/puzpuzpuz/xsync/v3 v3.5.1
-	github.com/quic-go/quic-go v0.60.0
-	github.com/rabbitmq/amqp091-go v1.13.0
+	github.com/quic-go/quic-go v0.52.0
+	github.com/rabbitmq/amqp091-go v1.10.0
 	github.com/rcrowley/go-metrics v0.0.0-20250401214520-65e299d6c5c9
-	github.com/shirou/gopsutil/v4 v4.26.6
+	github.com/shirou/gopsutil/v4 v4.25.4
 	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 v1.22.17
+	github.com/urfave/cli v1.22.16
 	github.com/vitrun/qart v0.0.0-20160531060029-bf64b92db6b0
 	github.com/willabides/kongplete v0.4.0
-	github.com/wlynxg/anet v0.0.5
-	golang.org/x/crypto v0.54.0
-	golang.org/x/exp v0.0.0-20260718201538-764159d718ef
-	golang.org/x/net v0.57.0
-	golang.org/x/sys v0.47.0
-	golang.org/x/text v0.40.0
-	golang.org/x/time v0.15.0
-	google.golang.org/protobuf v1.36.11
-	modernc.org/sqlite v1.54.0
-	sigs.k8s.io/yaml v1.6.0
+	go.uber.org/automaxprocs v1.6.0
+	golang.org/x/crypto v0.38.0
+	golang.org/x/net v0.40.0
+	golang.org/x/sys v0.33.0
+	golang.org/x/text v0.25.0
+	golang.org/x/time v0.11.0
+	golang.org/x/tools v0.33.0
+	google.golang.org/protobuf v1.36.6
+	sigs.k8s.io/yaml v1.4.0
 )

 require (
-	github.com/Azure/go-ntlmssp v0.1.1 // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.18.0 // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.1 // indirect
+	github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 // 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 v2.0.7 // indirect
+	github.com/coreos/go-semver v0.3.1 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.5 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/dustin/go-humanize v1.0.1 // indirect
-	github.com/ebitengine/purego v0.10.0 // indirect
+	github.com/ebitengine/purego v0.8.3 // indirect
 	github.com/fsnotify/fsnotify v1.7.0 // indirect
-	github.com/go-asn1-ber/asn1-ber v1.5.8 // 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 v0.0.0-20250423184734-337e5dd93bb4 // indirect
 	github.com/google/uuid v1.6.0 // indirect
@@ -71,47 +74,29 @@ require (
 	github.com/hashicorp/go-multierror v1.1.1 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // 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 v1.0.0 // indirect
 	github.com/nxadm/tail v1.4.11 // indirect
+	github.com/onsi/ginkgo/v2 v2.23.4 // 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 v0.6.2 // indirect
-	github.com/prometheus/common v0.70.0 // indirect
-	github.com/prometheus/procfs v0.21.1 // indirect
-	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // 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/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 v1.11.1 // indirect
-	github.com/tklauser/go-sysconf v0.3.16 // indirect
-	github.com/tklauser/numcpus v0.11.0 // 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/yusufpapurcu/wmi v1.2.4 // indirect
-	go.yaml.in/yaml/v2 v2.4.4 // indirect
-	golang.org/x/mod v0.38.0 // indirect
-	golang.org/x/sync v0.22.0 // indirect
-	golang.org/x/telemetry v0.0.0-20260708182218-49f421fb7959 // indirect
-	golang.org/x/tools v0.48.0 // indirect
+	go.uber.org/mock v0.5.2 // indirect
+	golang.org/x/mod v0.24.0 // indirect
+	golang.org/x/sync v0.14.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	modernc.org/libc v1.74.1 // indirect
-	modernc.org/mathutil v1.7.1 // 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
-
-tool (
-	github.com/calmh/xdr/cmd/genxdr
-	github.com/maxbrunsfeld/counterfeiter/v6
-	golang.org/x/tools/cmd/goimports
-)
@@ -1,20 +1,30 @@
-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 h1:9zjbYlTupi+W5SJXm2cR2sV2mJAIg1sIfDcsW7hrkPM=
-github.com/AudriusButkevicius/recli v0.0.7/go.mod h1:Nhfib1j/VFnLrXL9cHgA+/n2O6P5THuWelOnbfPNd78=
-github.com/Azure/go-ntlmssp v0.1.1 h1:l+FM/EEMb0U9QZE7mKNEDw5Mu3mFiaa2GKOoTSsNDPw=
-github.com/Azure/go-ntlmssp v0.1.1/go.mod h1:NYqdhxd/8aAct/s4qSYZEerdPuH1liG2/X9DiVTbhpk=
-github.com/BurntSushi/toml v1.5.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+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/azure-sdk-for-go/sdk/azcore v1.18.0 h1:Gt0j3wceWMwPmiazCa8MzMA0MfhmPIz0Qp0FJ6qcM0U=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.18.0/go.mod h1:Ot/6aikWnKWi4l9QB7qVSwa8iMphQNqkWALMoNT3rzM=
+github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.9.0 h1:OVoM452qUFBrX+URdH3VpR299ma4kfom0yB0URYky9g=
+github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.9.0/go.mod h1:kUjrAo8bgEwLeZ/CmHqNl3Z/kPm7y6FKfxxK0izYUg4=
+github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.1 h1:FPKJS1T+clwv+OLGt13a8UjqeRuh0O4SJ3lUriThc+4=
+github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.1/go.mod h1:j2chePtV91HrC22tGoRX3sGY42uF13WzmmV80/OdVAA=
+github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/storage/armstorage v1.8.0 h1:LR0kAX9ykz8G4YgLCaRDVJ3+n43R8MneB5dTy2konZo=
+github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/storage/armstorage v1.8.0/go.mod h1:DWAciXemNf++PQJLeXUB4HHH5OpsAh12HZnu2wXE1jA=
+github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.6.1 h1:lhZdRq7TIx0GJQvSyX2Si406vrYsov2FXGp/RnSEtcs=
+github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.6.1/go.mod h1:8cl44BDmi+effbARHMQjgOKA2AYvcohNm7KEt42mSV8=
+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/AzureAD/microsoft-authentication-library-for-go v1.4.2 h1:oygO0locgZJe7PpYPXT5A29ZkwJaPqcva7BVeemZOZs=
+github.com/AzureAD/microsoft-authentication-library-for-go v1.4.2/go.mod h1:wP83P5OoQ5p6ip3ScPr0BAq0BvuPAvacpEuSzyouqAI=
+github.com/BurntSushi/toml v1.4.0/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 v1.16.0 h1:g92/kUxBcdcTPOM79yE63viJgtcp5dNyrB3/O2cjYT4=
-github.com/alecthomas/kong v1.16.0/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=
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@@ -82,6 +96,7 @@ github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
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@@ -90,6 +105,8 @@ github.com/google/pprof v0.0.0-20250423184734-337e5dd93bb4 h1:gD0vax+4I+mAj+jECh
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@@ -218,8 +226,8 @@ github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf
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 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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@@ -282,13 +284,13 @@ golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwY
 golang.org/x/net v0.0.0-20210428140749-89ef3d95e781/go.mod h1:OJAsFXCWl8Ukc7SiCT/9KSuxbyM7479/AVlXFRxuMCk=
 golang.org/x/net v0.0.0-20220225172249-27dd8689420f/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/net v0.0.0-20220607020251-c690dde0001d/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
-golang.org/x/net v0.57.0 h1:K5+3DljvIuDG9/Jv9rvyMywYNFCQ9RSUY6OOTTkT+tE=
-golang.org/x/net v0.57.0/go.mod h1:KpXc8iv+r3XplLAG/f7Jsf9RPszJzdR0f58q9vGOuEU=
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 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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@@ -310,26 +312,23 @@ golang.org/x/sys v0.0.0-20220412211240-33da011f77ad/go.mod h1:oPkhp1MJrh7nUepCBc
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@@ -343,8 +342,8 @@ 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 v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
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@@ -360,33 +359,5 @@ gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
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-modernc.org/token v1.1.0/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM=
-sigs.k8s.io/yaml v1.6.0 h1:G8fkbMSAFqgEFgh4b1wmtzDnioxFCUgTZhlbj5P9QYs=
-sigs.k8s.io/yaml v1.6.0/go.mod h1:796bPqUfzR/0jLAl6XjHl3Ck7MiyVv8dbTdyT3/pMf4=
+sigs.k8s.io/yaml v1.4.0 h1:Mk1wCc2gy/F0THH0TAp1QYyJNzRm2KCLy3o5ASXVI5E=
+sigs.k8s.io/yaml v1.4.0/go.mod h1:Ejl7/uTz7PSA4eKMyQCUTnhZYNmLIl+5c2lQPGR2BPY=
@@ -221,8 +221,8 @@ li[language-select] > .dropdown-menu {
 }

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

 .nav>li{
@@ -445,20 +445,6 @@ ul.three-columns li, ul.two-columns li {
        -moz-column-count: 1;
        column-count: 1;
    }
-      /* All buttons, except panel headings, get bottom margin, as they
-       won't fit beside each other anymore. Reduce footer padding to
-       compensate for the margin. */
-    .btn:not(.panel-heading),
-    .btn:not(.panel-heading) + .btn:not(.panel-heading) {
-        margin-bottom: 10px;
-    }
-    
-    .panel-footer {
-        padding-bottom: 0;
-    }
-    .modal-footer {
-        padding-bottom: 5px;
-    }
 }

@media (max-width:479px) {
@@ -491,6 +477,20 @@ ul.three-columns li, ul.two-columns li {
        width: 100%;
    }

+    /* All buttons, except panel headings, get bottom margin, as they
+       won't fit beside each other anymore. Reduce footer padding to
+       compensate for the margin. */
+    .btn:not(.panel-heading),
+    .btn:not(.panel-heading) + .btn:not(.panel-heading) {
+        margin-bottom: 10px;
+    }
+    .panel-footer {
+        padding-bottom: 0;
+    }
+    .modal-footer {
+        padding-bottom: 5px;
+    }
+
    table.table-auto td,
    table.table-auto th,
    table.table-condensed td,
@@ -552,4 +552,4 @@ html[lang|="ko"] i {
 .select-on-click {
    -webkit-user-select: all;
    user-select: all;
-}
+}
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Jakob Borg	0945304a79	build: fix detection of next rc version	2025-06-20 11:17:23 +02:00
Jakob Borg	9703dd9f57	build: import release workflow changes from main	2025-06-20 11:12:05 +02:00
yparitcherandJakob Borg	259e9ef08e	fix(protocol): slightly loosen/correct ownership comparison criteria (fixes #9879 ) (#10176 ) Only Require either matching UID & GID OR matching Names. If the 2 devices have a different Name => UID mapping, they can never be totaly equal. Therefore when syncing we try matching the Name and fall back to the UID. However when scanning for changes we currently require both the Name & UID to match. This leads to forever having out of sync files back and forth, or local additions when receive only. This patch does not change the sending behavoir. It only change what we decide is equal for exisiting files with mismapped Name => UID, The added testcases show the change: Test 1,5,6 are the same as current. Test 2,3 Are what change with this patch (from false to true). Test 4 is a subset of test 2 they is currently special cased as true, which does not chnage. Co-authored-by: Jakob Borg <jakob@kastelo.net>	2025-06-20 09:55:42 +02:00
Simon FreiandJakob Borg	6a0c6128d8	fix(watchaggregator): properly handle sub-second watch durations (fixes #9927 ) (#10179 ) I'll let Audrius words from the ticket explain this :) > I'm a bit lost, time.Duration is an int64, yet watcher delay is float, > anything sub 1s gets rounded down to 0, so you just end up going into an > infinite loop. https://github.com/syncthing/syncthing/issues/9927#issuecomment-2967736106	2025-06-15 10:29:33 +02:00