mirror of https://github.com/octoleo/restic.git
139 lines
3.9 KiB
Go
139 lines
3.9 KiB
Go
package main
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import (
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"context"
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"github.com/spf13/cobra"
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"github.com/restic/restic/internal/debug"
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"github.com/restic/restic/internal/errors"
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"github.com/restic/restic/internal/repository"
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"github.com/restic/restic/internal/restic"
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)
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var cmdTag = &cobra.Command{
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Use: "tag [flags] [snapshot-ID ...]",
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Short: "Modify tags on snapshots",
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Long: `
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The "tag" command allows you to modify tags on exiting snapshots.
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You can either set/replace the entire set of tags on a snapshot, or
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add tags to/remove tags from the existing set.
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When no snapshot-ID is given, all snapshots matching the host, tag and path filter criteria are modified.
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EXIT STATUS
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===========
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Exit status is 0 if the command was successful, and non-zero if there was any error.
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`,
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DisableAutoGenTag: true,
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RunE: func(cmd *cobra.Command, args []string) error {
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return runTag(cmd.Context(), tagOptions, globalOptions, args)
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},
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}
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// TagOptions bundles all options for the 'tag' command.
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type TagOptions struct {
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snapshotFilterOptions
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SetTags restic.TagLists
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AddTags restic.TagLists
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RemoveTags restic.TagLists
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}
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var tagOptions TagOptions
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func init() {
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cmdRoot.AddCommand(cmdTag)
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tagFlags := cmdTag.Flags()
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tagFlags.Var(&tagOptions.SetTags, "set", "`tags` which will replace the existing tags in the format `tag[,tag,...]` (can be given multiple times)")
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tagFlags.Var(&tagOptions.AddTags, "add", "`tags` which will be added to the existing tags in the format `tag[,tag,...]` (can be given multiple times)")
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tagFlags.Var(&tagOptions.RemoveTags, "remove", "`tags` which will be removed from the existing tags in the format `tag[,tag,...]` (can be given multiple times)")
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initMultiSnapshotFilterOptions(tagFlags, &tagOptions.snapshotFilterOptions, true)
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}
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func changeTags(ctx context.Context, repo *repository.Repository, sn *restic.Snapshot, setTags, addTags, removeTags []string) (bool, error) {
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var changed bool
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if len(setTags) != 0 {
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// Setting the tag to an empty string really means no tags.
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if len(setTags) == 1 && setTags[0] == "" {
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setTags = nil
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}
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sn.Tags = setTags
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changed = true
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} else {
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changed = sn.AddTags(addTags)
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if sn.RemoveTags(removeTags) {
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changed = true
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}
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}
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if changed {
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// Retain the original snapshot id over all tag changes.
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if sn.Original == nil {
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sn.Original = sn.ID()
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}
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// Save the new snapshot.
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id, err := restic.SaveSnapshot(ctx, repo, sn)
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if err != nil {
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return false, err
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}
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debug.Log("new snapshot saved as %v", id)
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// Remove the old snapshot.
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h := restic.Handle{Type: restic.SnapshotFile, Name: sn.ID().String()}
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if err = repo.Backend().Remove(ctx, h); err != nil {
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return false, err
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}
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debug.Log("old snapshot %v removed", sn.ID())
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}
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return changed, nil
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}
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func runTag(ctx context.Context, opts TagOptions, gopts GlobalOptions, args []string) error {
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if len(opts.SetTags) == 0 && len(opts.AddTags) == 0 && len(opts.RemoveTags) == 0 {
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return errors.Fatal("nothing to do!")
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}
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if len(opts.SetTags) != 0 && (len(opts.AddTags) != 0 || len(opts.RemoveTags) != 0) {
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return errors.Fatal("--set and --add/--remove cannot be given at the same time")
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}
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repo, err := OpenRepository(ctx, gopts)
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if err != nil {
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return err
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}
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if !gopts.NoLock {
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Verbosef("create exclusive lock for repository\n")
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var lock *restic.Lock
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lock, ctx, err = lockRepoExclusive(ctx, repo)
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defer unlockRepo(lock)
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if err != nil {
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return err
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}
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}
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changeCnt := 0
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for sn := range FindFilteredSnapshots(ctx, repo.Backend(), repo, opts.Hosts, opts.Tags, opts.Paths, args) {
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changed, err := changeTags(ctx, repo, sn, opts.SetTags.Flatten(), opts.AddTags.Flatten(), opts.RemoveTags.Flatten())
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if err != nil {
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Warnf("unable to modify the tags for snapshot ID %q, ignoring: %v\n", sn.ID(), err)
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continue
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}
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if changed {
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changeCnt++
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}
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}
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if changeCnt == 0 {
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Verbosef("no snapshots were modified\n")
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} else {
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Verbosef("modified tags on %v snapshots\n", changeCnt)
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}
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return nil
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}
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