chore: switch database engine to sqlite (fixes #9954) (#9965)

Switch the database from LevelDB to SQLite, for greater stability and
simpler code.

Co-authored-by: Tommy van der Vorst <tommy@pixelspark.nl>
Co-authored-by: bt90 <btom1990@googlemail.com>

lib/versioner/external.go

@@ -41,7 +41,7 @@ func newExternal(cfg config.FolderConfiguration) Versioner {
 
 	s := external{
 		command:    command,
-		filesystem: cfg.Filesystem(nil),
+		filesystem: cfg.Filesystem(),
 	}
 
 	l.Debugf("instantiated %#v", s)

lib/versioner/simple.go

@@ -41,7 +41,7 @@ func newSimple(cfg config.FolderConfiguration) Versioner {
 	s := simple{
 		keep:            keep,
 		cleanoutDays:    cleanoutDays,
-		folderFs:        cfg.Filesystem(nil),
+		folderFs:        cfg.Filesystem(),
 		versionsFs:      versionerFsFromFolderCfg(cfg),
 		copyRangeMethod: cfg.CopyRangeMethod.ToFS(),
 	}

lib/versioner/simple_test.go

@@ -64,7 +64,7 @@ func TestSimpleVersioningVersionCount(t *testing.T) {
 			},
 		},
 	}
-	fs := cfg.Filesystem(nil)
+	fs := cfg.Filesystem()
 
 	v := newSimple(cfg)
 
@@ -116,7 +116,7 @@ func TestPathTildes(t *testing.T) {
 			},
 		},
 	}
-	fs := cfg.Filesystem(nil)
+	fs := cfg.Filesystem()
 	v := newSimple(cfg)
 
 	const testPath = "test"

lib/versioner/staggered.go

@@ -44,7 +44,7 @@ func newStaggered(cfg config.FolderConfiguration) Versioner {
 	versionsFs := versionerFsFromFolderCfg(cfg)
 
 	s := &staggered{
-		folderFs:   cfg.Filesystem(nil),
+		folderFs:   cfg.Filesystem(),
 		versionsFs: versionsFs,
 		interval: [4]interval{
 			{30, 60 * 60},                     // first hour -> 30 sec between versions

lib/versioner/trashcan.go

@@ -33,7 +33,7 @@ func newTrashcan(cfg config.FolderConfiguration) Versioner {
 	// On error we default to 0, "do not clean out the trash can"
 
 	s := &trashcan{
-		folderFs:        cfg.Filesystem(nil),
+		folderFs:        cfg.Filesystem(),
 		versionsFs:      versionerFsFromFolderCfg(cfg),
 		cleanoutDays:    cleanoutDays,
 		copyRangeMethod: cfg.CopyRangeMethod.ToFS(),

lib/versioner/trashcan_test.go

@@ -34,7 +34,7 @@ func TestTrashcanArchiveRestoreSwitcharoo(t *testing.T) {
 			FSPath: tmpDir2,
 		},
 	}
-	folderFs := cfg.Filesystem(nil)
+	folderFs := cfg.Filesystem()
 
 	versionsFs := fs.NewFilesystem(fs.FilesystemTypeBasic, tmpDir2)
 
@@ -113,7 +113,7 @@ func TestTrashcanRestoreDeletedFile(t *testing.T) {
 		},
 	}
 
-	folderFs := cfg.Filesystem(nil)
+	folderFs := cfg.Filesystem()
 
 	versionsFs := fs.NewFilesystem(fs.FilesystemTypeBasic, tmpDir2)
 
@@ -209,7 +209,7 @@ func TestTrashcanCleanOut(t *testing.T) {
 		},
 	}
 
-	fs := cfg.Filesystem(nil)
+	fs := cfg.Filesystem()
 
 	v := newTrashcan(cfg)
 

lib/versioner/util.go

@@ -259,7 +259,7 @@ func restoreFile(method fs.CopyRangeMethod, src, dst fs.Filesystem, filePath str
 }
 
 func versionerFsFromFolderCfg(cfg config.FolderConfiguration) (versionsFs fs.Filesystem) {
-	folderFs := cfg.Filesystem(nil)
+	folderFs := cfg.Filesystem()
 	if cfg.Versioning.FSPath == "" {
 		versionsFs = fs.NewFilesystem(folderFs.Type(), filepath.Join(folderFs.URI(), DefaultPath))
 	} else if cfg.Versioning.FSType == config.FilesystemTypeBasic {