Merge pull request #2690 from SkYNewZ/master

Fix #2688: Handle comma-separated list tags when using backup command

changelog/unreleased/issue-2688

@@ -0,0 +1,26 @@
+Bugfix: Make backup and tag commands separate tags by comma
+
+Running `restic backup --tag foo,bar` previously created snapshots with one
+single tag containing a comma ("foo,bar") instead of two tags ("foo", "bar").
+Similarly, the `tag` command's --set, --add and --remove options would treat
+"foo,bar" as one tag instead of two tags. This was inconsistent with other
+commands and often unexpected when one intended "foo,bar" to mean two tags.
+
+To be consistent in all commands, restic now interprets "foo,bar" to mean two
+separate tags ("foo" and "bar") instead of one tag ("foo,bar") everywhere,
+including in the `backup` and `tag` commands.
+
+NOTE: This change might result in unexpected behavior in cases where you use
+the `forget` command and filter on tags like "foo,bar". Snapshots previously
+backed up with `--tag foo,bar` will still not match that filter, but snapshots
+saved from now on will match that filter.
+
+To replace "foo,bar" tags with "foo" and "bar" tags in old snapshots, you can
+first generate a list of the relevant snapshots using a command like
+`restic snapshots --json --quiet | jq '.[] | select(contains({tags: ["foo,bar"]})) | .id'`
+, and then use `restic tag --set foo --set bar snapshotID [...]` to set the new
+tags. Please adjust the commands to real tag names and any additional tags,
+as well as the list of snapshots to process.
+
+https://github.com/restic/restic/issues/2688
+https://github.com/restic/restic/pull/2690

cmd/restic/cmd_backup.go

@@ -91,7 +91,7 @@ type BackupOptions struct {
 	ExcludeLargerThan       string
 	Stdin                   bool
 	StdinFilename           string
-	Tags                    []string
+	Tags                    restic.TagList
 	Host                    string
 	FilesFrom               []string
 	TimeStamp               string
@@ -121,7 +121,7 @@ func init() {
 	f.StringVar(&backupOptions.ExcludeLargerThan, "exclude-larger-than", "", "max `size` of the files to be backed up (allowed suffixes: k/K, m/M, g/G, t/T)")
 	f.BoolVar(&backupOptions.Stdin, "stdin", false, "read backup from stdin")
 	f.StringVar(&backupOptions.StdinFilename, "stdin-filename", "stdin", "`filename` to use when reading from stdin")
-	f.StringArrayVar(&backupOptions.Tags, "tag", nil, "add a `tag` for the new snapshot (can be specified multiple times)")
+	f.Var(&backupOptions.Tags, "tag", "add `tags` for the new snapshot in the format `tag[,tag,...]` (can be specified multiple times)")
 
 	f.StringVarP(&backupOptions.Host, "host", "H", "", "set the `hostname` for the snapshot manually. To prevent an expensive rescan use the \"parent\" flag")
 	f.StringVar(&backupOptions.Host, "hostname", "", "set the `hostname` for the snapshot manually")

cmd/restic/cmd_snapshots.go

@@ -47,7 +47,7 @@ func init() {
 
 	f := cmdSnapshots.Flags()
 	f.StringArrayVarP(&snapshotOptions.Hosts, "host", "H", nil, "only consider snapshots for this `host` (can be specified multiple times)")
-	f.Var(&snapshotOptions.Tags, "tag", "only consider snapshots which include this `taglist` (can be specified multiple times)")
+	f.Var(&snapshotOptions.Tags, "tag", "only consider snapshots which include this `taglist` in the format `tag[,tag,...]` (can be specified multiple times)")
 	f.StringArrayVar(&snapshotOptions.Paths, "path", nil, "only consider snapshots for this `path` (can be specified multiple times)")
 	f.BoolVarP(&snapshotOptions.Compact, "compact", "c", false, "use compact output format")
 	f.BoolVar(&snapshotOptions.Last, "last", false, "only show the last snapshot for each host and path")

cmd/restic/cmd_tag.go

@@ -38,9 +38,9 @@ type TagOptions struct {
 	Hosts      []string
 	Paths      []string
 	Tags       restic.TagLists
-	SetTags    []string
+	SetTags    restic.TagList
-	AddTags    []string
+	AddTags    restic.TagList
-	RemoveTags []string
+	RemoveTags restic.TagList
 }
 
 var tagOptions TagOptions
@@ -49,9 +49,9 @@ func init() {
 	cmdRoot.AddCommand(cmdTag)
 
 	tagFlags := cmdTag.Flags()
-	tagFlags.StringSliceVar(&tagOptions.SetTags, "set", nil, "`tag` which will replace the existing tags (can be given multiple times)")
+	tagFlags.Var(&tagOptions.SetTags, "set", "`tags` which will replace the existing tags in the format `tag[,tag,...]` (can be given multiple times)")
-	tagFlags.StringSliceVar(&tagOptions.AddTags, "add", nil, "`tag` which will be added to the existing tags (can be given multiple times)")
+	tagFlags.Var(&tagOptions.AddTags, "add", "`tags` which will be added to the existing tags in the format `tag[,tag,...]` (can be given multiple times)")
-	tagFlags.StringSliceVar(&tagOptions.RemoveTags, "remove", nil, "`tag` which will be removed from the existing tags (can be given multiple times)")
+	tagFlags.Var(&tagOptions.RemoveTags, "remove", "`tags` which will be removed from the existing tags in the format `tag[,tag,...]` (can be given multiple times)")
 
 	tagFlags.StringArrayVarP(&tagOptions.Hosts, "host", "H", nil, "only consider snapshots for this `host`, when no snapshot ID is given (can be specified multiple times)")
 	tagFlags.Var(&tagOptions.Tags, "tag", "only consider snapshots which include this `taglist`, when no snapshot-ID is given")

doc/manual_rest.rst

@@ -105,7 +105,7 @@ command:
           --parent snapshot                        use this parent snapshot (default: last snapshot in the repo that has the same target files/directories)
           --stdin                                  read backup from stdin
           --stdin-filename filename                filename to use when reading from stdin (default "stdin")
-          --tag tag                                add a tag for the new snapshot (can be specified multiple times)
+          --tag tag                                add `tags` for the new snapshot in the format `tag[,tag,...]` (can be specified multiple times)
           --time time                              time of the backup (ex. '2012-11-01 22:08:41') (default: now)
           --use-fs-snapshot                        use filesystem snapshot where possible (currently only Windows VSS)
           --with-atime                             store the atime for all files and directories

internal/archiver/archiver.go

@@ -717,7 +717,7 @@ func resolveRelativeTargets(filesys fs.FS, targets []string) ([]string, error) {
 
 // SnapshotOptions collect attributes for a new snapshot.
 type SnapshotOptions struct {
-	Tags           []string
+	Tags           restic.TagList
 	Hostname       string
 	Excludes       []string
 	Time           time.Time