247 lines
6.9 KiB
Go
247 lines
6.9 KiB
Go
package main
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import (
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"context"
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"encoding/json"
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"io"
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"github.com/restic/restic/internal/restic"
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"github.com/spf13/cobra"
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)
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var cmdForget = &cobra.Command{
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Use: "forget [flags] [snapshot ID] [...]",
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Short: "Remove snapshots from the repository",
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Long: `
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The "forget" command removes snapshots according to a policy. Please note that
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this command really only deletes the snapshot object in the repository, which
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is a reference to data stored there. In order to remove this (now unreferenced)
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data after 'forget' was run successfully, see the 'prune' command.
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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 runForget(forgetOptions, globalOptions, args)
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},
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}
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// ForgetOptions collects all options for the forget command.
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type ForgetOptions struct {
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Last int
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Hourly int
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Daily int
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Weekly int
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Monthly int
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Yearly int
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Within restic.Duration
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KeepTags restic.TagLists
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Hosts []string
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Tags restic.TagLists
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Paths []string
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Compact bool
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// Grouping
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GroupBy string
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DryRun bool
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Prune bool
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}
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var forgetOptions ForgetOptions
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func init() {
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cmdRoot.AddCommand(cmdForget)
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f := cmdForget.Flags()
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f.IntVarP(&forgetOptions.Last, "keep-last", "l", 0, "keep the last `n` snapshots")
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f.IntVarP(&forgetOptions.Hourly, "keep-hourly", "H", 0, "keep the last `n` hourly snapshots")
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f.IntVarP(&forgetOptions.Daily, "keep-daily", "d", 0, "keep the last `n` daily snapshots")
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f.IntVarP(&forgetOptions.Weekly, "keep-weekly", "w", 0, "keep the last `n` weekly snapshots")
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f.IntVarP(&forgetOptions.Monthly, "keep-monthly", "m", 0, "keep the last `n` monthly snapshots")
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f.IntVarP(&forgetOptions.Yearly, "keep-yearly", "y", 0, "keep the last `n` yearly snapshots")
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f.VarP(&forgetOptions.Within, "keep-within", "", "keep snapshots that are newer than `duration` (eg. 1y5m7d2h) relative to the latest snapshot")
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f.Var(&forgetOptions.KeepTags, "keep-tag", "keep snapshots with this `taglist` (can be specified multiple times)")
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f.StringArrayVar(&forgetOptions.Hosts, "host", nil, "only consider snapshots with the given `host` (can be specified multiple times)")
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f.StringArrayVar(&forgetOptions.Hosts, "hostname", nil, "only consider snapshots with the given `hostname` (can be specified multiple times)")
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f.MarkDeprecated("hostname", "use --host")
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f.Var(&forgetOptions.Tags, "tag", "only consider snapshots which include this `taglist` in the format `tag[,tag,...]` (can be specified multiple times)")
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f.StringArrayVar(&forgetOptions.Paths, "path", nil, "only consider snapshots which include this (absolute) `path` (can be specified multiple times)")
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f.BoolVarP(&forgetOptions.Compact, "compact", "c", false, "use compact output format")
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f.StringVarP(&forgetOptions.GroupBy, "group-by", "g", "host,paths", "string for grouping snapshots by host,paths,tags")
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f.BoolVarP(&forgetOptions.DryRun, "dry-run", "n", false, "do not delete anything, just print what would be done")
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f.BoolVar(&forgetOptions.Prune, "prune", false, "automatically run the 'prune' command if snapshots have been removed")
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f.SortFlags = false
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addPruneOptions(cmdForget)
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}
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func runForget(opts ForgetOptions, gopts GlobalOptions, args []string) error {
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err := verifyPruneOptions(&pruneOptions)
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if err != nil {
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return err
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}
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repo, err := OpenRepository(gopts)
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if err != nil {
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return err
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}
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lock, err := lockRepoExclusive(gopts.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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ctx, cancel := context.WithCancel(gopts.ctx)
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defer cancel()
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var snapshots restic.Snapshots
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removeSnIDs := restic.NewIDSet()
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for sn := range FindFilteredSnapshots(ctx, repo, opts.Hosts, opts.Tags, opts.Paths, args) {
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snapshots = append(snapshots, sn)
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}
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var jsonGroups []*ForgetGroup
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if len(args) > 0 {
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// When explicit snapshots args are given, remove them immediately.
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for _, sn := range snapshots {
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removeSnIDs.Insert(*sn.ID())
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}
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} else {
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snapshotGroups, _, err := restic.GroupSnapshots(snapshots, opts.GroupBy)
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if err != nil {
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return err
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}
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policy := restic.ExpirePolicy{
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Last: opts.Last,
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Hourly: opts.Hourly,
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Daily: opts.Daily,
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Weekly: opts.Weekly,
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Monthly: opts.Monthly,
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Yearly: opts.Yearly,
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Within: opts.Within,
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Tags: opts.KeepTags,
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}
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if policy.Empty() && len(args) == 0 {
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if !gopts.JSON {
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Verbosef("no policy was specified, no snapshots will be removed\n")
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}
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}
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if !policy.Empty() {
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if !gopts.JSON {
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Verbosef("Applying Policy: %v\n", policy)
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}
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for k, snapshotGroup := range snapshotGroups {
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if gopts.Verbose >= 1 && !gopts.JSON {
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err = PrintSnapshotGroupHeader(gopts.stdout, k)
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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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var key restic.SnapshotGroupKey
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if json.Unmarshal([]byte(k), &key) != nil {
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return err
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}
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var fg ForgetGroup
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fg.Tags = key.Tags
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fg.Host = key.Hostname
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fg.Paths = key.Paths
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keep, remove, reasons := restic.ApplyPolicy(snapshotGroup, policy)
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if len(keep) != 0 && !gopts.Quiet && !gopts.JSON {
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Printf("keep %d snapshots:\n", len(keep))
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PrintSnapshots(globalOptions.stdout, keep, reasons, opts.Compact)
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Printf("\n")
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}
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addJSONSnapshots(&fg.Keep, keep)
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if len(remove) != 0 && !gopts.Quiet && !gopts.JSON {
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Printf("remove %d snapshots:\n", len(remove))
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PrintSnapshots(globalOptions.stdout, remove, nil, opts.Compact)
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Printf("\n")
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}
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addJSONSnapshots(&fg.Remove, remove)
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fg.Reasons = reasons
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jsonGroups = append(jsonGroups, &fg)
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for _, sn := range remove {
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removeSnIDs.Insert(*sn.ID())
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}
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}
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}
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}
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if len(removeSnIDs) > 0 {
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if !opts.DryRun {
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err := DeleteFilesChecked(gopts, repo, removeSnIDs, restic.SnapshotFile)
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if err != nil {
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return err
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}
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} else {
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if !gopts.JSON {
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Printf("Would have removed the following snapshots:\n%v\n\n", removeSnIDs)
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}
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}
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}
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if gopts.JSON && len(jsonGroups) > 0 {
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err = printJSONForget(gopts.stdout, jsonGroups)
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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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if len(removeSnIDs) > 0 && opts.Prune && !opts.DryRun {
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if !gopts.JSON {
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Verbosef("%d snapshots have been removed, running prune\n", len(removeSnIDs))
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}
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pruneOptions.DryRun = opts.DryRun
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return runPruneWithRepo(pruneOptions, gopts, repo, removeSnIDs)
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}
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return nil
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}
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// ForgetGroup helps to print what is forgotten in JSON.
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type ForgetGroup struct {
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Tags []string `json:"tags"`
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Host string `json:"host"`
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Paths []string `json:"paths"`
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Keep []Snapshot `json:"keep"`
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Remove []Snapshot `json:"remove"`
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Reasons []restic.KeepReason `json:"reasons"`
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}
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func addJSONSnapshots(js *[]Snapshot, list restic.Snapshots) {
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for _, sn := range list {
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k := Snapshot{
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Snapshot: sn,
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ID: sn.ID(),
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ShortID: sn.ID().Str(),
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}
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*js = append(*js, k)
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}
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}
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func printJSONForget(stdout io.Writer, forgets []*ForgetGroup) error {
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return json.NewEncoder(stdout).Encode(forgets)
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}
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