Merge pull request #616 from restic/add-snapshot-tags

Add tags to snapshots

doc/Manual.md

@@ -84,18 +84,24 @@ them, e.g. for the `backup` command:
     The backup command creates a snapshot of a file or directory
 
     Application Options:
-      -r, --repo=        Repository directory to backup to/restore from
+      -r, --repo=               Repository directory to backup to/restore from (/tmp/repo)
-          --cache-dir=   Directory to use as a local cache
+      -p, --password-file=      Read the repository password from a file
-      -q, --quiet        Do not output comprehensive progress report (false)
+          --cache-dir=          Directory to use as a local cache
-          --no-lock      Do not lock the repo, this allows some operations on read-only repos. (false)
+      -q, --quiet               Do not output comprehensive progress report (false)
+          --no-lock             Do not lock the repo, this allows some operations on read-only repos. (false)
+      -o, --option=             Specify options in the form 'foo.key=value'
 
     Help Options:
-      -h, --help         Show this help message
+      -h, --help                Show this help message
 
     [backup command options]
-          -p, --parent=  use this parent snapshot (default: last snapshot in repo that has the same target)
+          -p, --parent=         use this parent snapshot (default: last snapshot in repo that has the same target)
-          -f, --force    Force re-reading the target. Overrides the "parent" flag
+          -f, --force           Force re-reading the target. Overrides the "parent" flag
-          -e, --exclude= Exclude a pattern (can be specified multiple times)
+          -e, --exclude=        Exclude a pattern (can be specified multiple times)
+              --exclude-file=   Read exclude-patterns from file
+              --stdin           read backup data from stdin
+              --stdin-filename= file name to use when reading from stdin (stdin)
+              --tag=            Add a tag (can be specified multiple times)
 
 Subcommand that support showing progress information such as `backup`, `check` and `prune` will do so unless
 the quiet flag `-q` or `--quiet` is set. When running from a non-interactive console progress reporting will
@@ -216,37 +222,47 @@ with `--stdin-filename`, e.g. like this:
 
     $ mysqldump [...] | restic -r /tmp/backup backup --stdin --stdin-filename production.sql
 
+## Tags
+
+Snapshots can have one or more tags, short strings which add identifying
+information. Just specify the tags for a snapshot with `--tag`:
+
+    $ restic -r /tmp/backup backup --tag projectX ~/shared/work/web
+    [...]
+
+The tags can later be used to keep (or forget) snapshots.
+
 # List all snapshots
 
 Now, you can list all the snapshots stored in the repository:
 
     $ restic -r /tmp/backup snapshots
     enter password for repository:
-    ID        Date                 Host      Directory
+    ID        Date                 Host    Tags   Directory
     ----------------------------------------------------------------------
-    40dc1520  2015-05-08 21:38:30  kasimir     /home/user/work
+    40dc1520  2015-05-08 21:38:30  kasimir        /home/user/work
-    79766175  2015-05-08 21:40:19  kasimir     /home/user/work
+    79766175  2015-05-08 21:40:19  kasimir        /home/user/work
-    bdbd3439  2015-05-08 21:45:17  luigi       /home/art
+    bdbd3439  2015-05-08 21:45:17  luigi          /home/art
-    590c8fc8  2015-05-08 21:47:38  kazik       /srv
+    590c8fc8  2015-05-08 21:47:38  kazik          /srv
-    9f0bc19e  2015-05-08 21:46:11  luigi       /srv
+    9f0bc19e  2015-05-08 21:46:11  luigi          /srv
 
 You can filter the listing by directory path:
 
     $ restic -r /tmp/backup snapshots --path="/srv"
     enter password for repository:
-    ID        Date                 Host      Directory
+    ID        Date                 Host    Tags   Directory
     ----------------------------------------------------------------------
-    590c8fc8  2015-05-08 21:47:38  kazik       /srv
+    590c8fc8  2015-05-08 21:47:38  kazik          /srv
-    9f0bc19e  2015-05-08 21:46:11  luigi       /srv
+    9f0bc19e  2015-05-08 21:46:11  luigi          /srv
 
 Or filter by host:
 
     $ restic -r /tmp/backup snapshots --host luigi
     enter password for repository:
-    ID        Date                 Host      Directory
+    ID        Date                 Host    Tags   Directory
     ----------------------------------------------------------------------
-    bdbd3439  2015-05-08 21:45:17  luigi       /home/art
+    bdbd3439  2015-05-08 21:45:17  luigi          /home/art
-    9f0bc19e  2015-05-08 21:46:11  luigi       /srv
+    9f0bc19e  2015-05-08 21:46:11  luigi          /srv
 
 Combining filters is also possible.    
 
@@ -412,13 +428,13 @@ The command `snapshots` can be used to list all snapshots in a repository like t
 
     $ restic -r /tmp/backup snapshots
     enter password for repository:
-    ID        Date                 Host      Directory
+    ID        Date                 Host      Tags  Directory
     ----------------------------------------------------------------------
-    40dc1520  2015-05-08 21:38:30  kasimir     /home/user/work
+    40dc1520  2015-05-08 21:38:30  kasimir         /home/user/work
-    79766175  2015-05-08 21:40:19  kasimir     /home/user/work
+    79766175  2015-05-08 21:40:19  kasimir         /home/user/work
-    bdbd3439  2015-05-08 21:45:17  luigi       /home/art
+    bdbd3439  2015-05-08 21:45:17  luigi           /home/art
-    590c8fc8  2015-05-08 21:47:38  kazik       /srv
+    590c8fc8  2015-05-08 21:47:38  kazik           /srv
-    9f0bc19e  2015-05-08 21:46:11  luigi       /srv
+    9f0bc19e  2015-05-08 21:46:11  luigi           /srv
 
 In order to remove the snapshot of `/home/art`, use the `forget` command and
 specify the snapshot ID on the command line:
@@ -431,12 +447,12 @@ Afterwards this snapshot is removed:
 
     $ restic -r /tmp/backup snapshots
     enter password for repository:
-    ID        Date                 Host      Directory
+    ID        Date                 Host     Tags  Directory
     ----------------------------------------------------------------------
-    40dc1520  2015-05-08 21:38:30  kasimir     /home/user/work
+    40dc1520  2015-05-08 21:38:30  kasimir        /home/user/work
-    79766175  2015-05-08 21:40:19  kasimir     /home/user/work
+    79766175  2015-05-08 21:40:19  kasimir        /home/user/work
-    590c8fc8  2015-05-08 21:47:38  kazik       /srv
+    590c8fc8  2015-05-08 21:47:38  kazik          /srv
-    9f0bc19e  2015-05-08 21:46:11  luigi       /srv
+    9f0bc19e  2015-05-08 21:46:11  luigi          /srv
 
 But the data that was referenced by files in this snapshot is still stored in
 the repository. To cleanup unreferenced data, the `prune` command must be run:
@@ -487,9 +503,13 @@ The `forget` command accepts the following parameters:
    keep the last one for that month.
  * `--keep-yearly n` for the last `n` years which have one or more snapshots, only
    keep the last one for that year.
+ * `--keep-tag` keep all snapshots which have all tags specified by this option
+   (can be specified multiple times).
 
 Additionally, you can restrict removing snapshots to those which have a
-particular hostname with the `--hostname` parameter.
+particular hostname with the `--hostname` parameter, or tags with the `--tag`
+option. When multiple tags are specified, only the snapshots which have all the
+tags are considered.
 
 All the `--keep-*` options above only count hours/days/weeks/months/years which
 have a snapshot, so those without a snapshot are ignored.

src/cmds/restic/cmd_backup.go

@@ -25,6 +25,7 @@ type CmdBackup struct {
 	ExcludeFile   string   `long:"exclude-file"                      description:"Read exclude-patterns from file"`
 	Stdin         bool     `long:"stdin"                             description:"read backup data from stdin"`
 	StdinFilename string   `long:"stdin-filename"    default:"stdin" description:"file name to use when reading from stdin"`
+	Tags          []string `long:"tag"                               description:"Add a tag (can be specified multiple times)"`
 
 	global *GlobalOptions
 }
@@ -209,7 +210,7 @@ func (cmd CmdBackup) newArchiveStdinProgress() *restic.Progress {
 			}
 		}
 
-		PrintProgress("%s%s", status1)
+		PrintProgress("%s", status1)
 	}
 
 	archiveProgress.OnDone = func(s restic.Stat, d time.Duration, ticker bool) {
@@ -259,7 +260,7 @@ func (cmd CmdBackup) readFromStdin(args []string) error {
 		return err
 	}
 
-	_, id, err := archiver.ArchiveReader(repo, cmd.newArchiveStdinProgress(), os.Stdin, cmd.StdinFilename)
+	_, id, err := archiver.ArchiveReader(repo, cmd.newArchiveStdinProgress(), os.Stdin, cmd.StdinFilename, cmd.Tags)
 	if err != nil {
 		return err
 	}
@@ -380,7 +381,7 @@ func (cmd CmdBackup) Execute(args []string) error {
 		return nil
 	}
 
-	_, id, err := arch.Snapshot(cmd.newArchiveProgress(stat), target, parentSnapshotID)
+	_, id, err := arch.Snapshot(cmd.newArchiveProgress(stat), target, cmd.Tags, parentSnapshotID)
 	if err != nil {
 		return err
 	}

src/cmds/restic/cmd_forget.go

@@ -9,14 +9,17 @@ import (
 
 // CmdForget implements the 'forget' command.
 type CmdForget struct {
-	Last    int `short:"l" long:"keep-last" description:"keep the last n snapshots"`
+	Last    int `short:"l" long:"keep-last"   description:"keep the last n snapshots"`
 	Hourly  int `short:"H" long:"keep-hourly" description:"keep the last n hourly snapshots"`
-	Daily   int `short:"d" long:"keep-daily" description:"keep the last n daily snapshots"`
+	Daily   int `short:"d" long:"keep-daily"  description:"keep the last n daily snapshots"`
 	Weekly  int `short:"w" long:"keep-weekly" description:"keep the last n weekly snapshots"`
-	Monthly int `short:"m" long:"keep-monthly" description:"keep the last n monthly snapshots"`
+	Monthly int `short:"m" long:"keep-monthly"description:"keep the last n monthly snapshots"`
 	Yearly  int `short:"y" long:"keep-yearly" description:"keep the last n yearly snapshots"`
 
-	Hostname string `long:"hostname" description:"only forget snapshots for the given hostname"`
+	KeepTags []string `long:"keep-tag"    description:"alwaps keep snapshots with this tag (can be specified multiple times)"`
+
+	Hostname string   `long:"hostname" description:"only forget snapshots for the given hostname"`
+	Tags     []string `long:"tag"      description:"only forget snapshots with the tag (can be specified multiple times)"`
 
 	DryRun bool `short:"n" long:"dry-run" description:"do not delete anything, just print what would be done"`
 
@@ -46,20 +49,38 @@ func (cmd CmdForget) Usage() string {
 
 func printSnapshots(w io.Writer, snapshots restic.Snapshots) {
 	tab := NewTable()
-	tab.Header = fmt.Sprintf("%-8s  %-19s  %-10s  %s", "ID", "Date", "Host", "Directory")
+	tab.Header = fmt.Sprintf("%-8s  %-19s  %-10s  %-10s  %s", "ID", "Date", "Host", "Tags", "Directory")
-	tab.RowFormat = "%-8s  %-19s  %-10s  %s"
+	tab.RowFormat = "%-8s  %-19s  %-10s  %-10s  %s"
 
 	for _, sn := range snapshots {
 		if len(sn.Paths) == 0 {
 			continue
 		}
-		id := sn.ID()
-		tab.Rows = append(tab.Rows, []interface{}{id.Str(), sn.Time.Format(TimeFormat), sn.Hostname, sn.Paths[0]})
 
-		if len(sn.Paths) > 1 {
+		firstTag := ""
-			for _, path := range sn.Paths[1:] {
+		if len(sn.Tags) > 0 {
-				tab.Rows = append(tab.Rows, []interface{}{"", "", "", path})
+			firstTag = sn.Tags[0]
+		}
+
+		tab.Rows = append(tab.Rows, []interface{}{sn.ID().Str(), sn.Time.Format(TimeFormat), sn.Hostname, firstTag, sn.Paths[0]})
+
+		rows := len(sn.Paths)
+		if len(sn.Tags) > rows {
+			rows = len(sn.Tags)
+		}
+
+		for i := 1; i < rows; i++ {
+			path := ""
+			if len(sn.Paths) > i {
+				path = sn.Paths[i]
 			}
+
+			tag := ""
+			if len(sn.Tags) > i {
+				tag = sn.Tags[i]
+			}
+
+			tab.Rows = append(tab.Rows, []interface{}{"", "", "", tag, path})
 		}
 	}
 
@@ -110,6 +131,7 @@ func (cmd CmdForget) Execute(args []string) error {
 		Weekly:  cmd.Weekly,
 		Monthly: cmd.Monthly,
 		Yearly:  cmd.Yearly,
+		Tags:    cmd.KeepTags,
 	}
 
 	if policy.Empty() {
@@ -135,6 +157,10 @@ func (cmd CmdForget) Execute(args []string) error {
 			continue
 		}
 
+		if !sn.HasTags(cmd.Tags) {
+			continue
+		}
+
 		k := key{Hostname: sn.Hostname, Dirs: strings.Join(sn.Paths, ":")}
 		list := snapshotGroups[k]
 		list = append(list, sn)

src/cmds/restic/cmd_snapshots.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"encoding/hex"
 	"fmt"
 	"io"
 	"os"
@@ -85,8 +84,8 @@ func (cmd CmdSnapshots) Execute(args []string) error {
 	}
 
 	tab := NewTable()
-	tab.Header = fmt.Sprintf("%-8s  %-19s  %-10s  %s", "ID", "Date", "Host", "Directory")
+	tab.Header = fmt.Sprintf("%-8s  %-19s  %-10s  %-10s  %s", "ID", "Date", "Host", "Tags", "Directory")
-	tab.RowFormat = "%-8s  %-19s  %-10s  %s"
+	tab.RowFormat = "%-8s  %-19s  %-10s  %-10s  %s"
 
 	done := make(chan struct{})
 	defer close(done)
@@ -115,22 +114,35 @@ func (cmd CmdSnapshots) Execute(args []string) error {
 
 	}
 
-	plen, err := repo.PrefixLength(restic.SnapshotFile)
-	if err != nil {
-		return err
-	}
-
 	for _, sn := range list {
 		if len(sn.Paths) == 0 {
 			continue
 		}
-		id := sn.ID()
-		tab.Rows = append(tab.Rows, []interface{}{hex.EncodeToString(id[:plen/2]), sn.Time.Format(TimeFormat), sn.Hostname, sn.Paths[0]})
 
-		if len(sn.Paths) > 1 {
+		firstTag := ""
-			for _, path := range sn.Paths[1:] {
+		if len(sn.Tags) > 0 {
-				tab.Rows = append(tab.Rows, []interface{}{"", "", "", path})
+			firstTag = sn.Tags[0]
+		}
+
+		tab.Rows = append(tab.Rows, []interface{}{sn.ID().Str(), sn.Time.Format(TimeFormat), sn.Hostname, firstTag, sn.Paths[0]})
+
+		rows := len(sn.Paths)
+		if len(sn.Tags) > rows {
+			rows = len(sn.Tags)
+		}
+
+		for i := 1; i < rows; i++ {
+			path := ""
+			if len(sn.Paths) > i {
+				path = sn.Paths[i]
 			}
+
+			tag := ""
+			if len(sn.Tags) > i {
+				tag = sn.Tags[i]
+			}
+
+			tab.Rows = append(tab.Rows, []interface{}{"", "", "", tag, path})
 		}
 	}
 

src/restic/archiver/archive_reader.go

@@ -13,9 +13,9 @@ import (
 
 // ArchiveReader reads from the reader and archives the data. Returned is the
 // resulting snapshot and its ID.
-func ArchiveReader(repo restic.Repository, p *restic.Progress, rd io.Reader, name string) (*restic.Snapshot, restic.ID, error) {
+func ArchiveReader(repo restic.Repository, p *restic.Progress, rd io.Reader, name string, tags []string) (*restic.Snapshot, restic.ID, error) {
 	debug.Log("ArchiveReader", "start archiving %s", name)
-	sn, err := restic.NewSnapshot([]string{name})
+	sn, err := restic.NewSnapshot([]string{name}, tags)
 	if err != nil {
 		return nil, restic.ID{}, err
 	}

src/restic/archiver/archive_reader_test.go

@@ -77,7 +77,7 @@ func TestArchiveReader(t *testing.T) {
 
 	f := fakeFile(t, seed, size)
 
-	sn, id, err := ArchiveReader(repo, nil, f, "fakefile")
+	sn, id, err := ArchiveReader(repo, nil, f, "fakefile", []string{"test"})
 	if err != nil {
 		t.Fatalf("ArchiveReader() returned error %v", err)
 	}
@@ -107,7 +107,7 @@ func BenchmarkArchiveReader(t *testing.B) {
 	t.ResetTimer()
 
 	for i := 0; i < t.N; i++ {
-		_, _, err := ArchiveReader(repo, nil, bytes.NewReader(buf), "fakefile")
+		_, _, err := ArchiveReader(repo, nil, bytes.NewReader(buf), "fakefile", []string{"test"})
 		if err != nil {
 			t.Fatal(err)
 		}

src/restic/archiver/archiver.go

@@ -633,7 +633,7 @@ func (p baseNameSlice) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
 // Snapshot creates a snapshot of the given paths. If parentrestic.ID is set, this is
 // used to compare the files to the ones archived at the time this snapshot was
 // taken.
-func (arch *Archiver) Snapshot(p *restic.Progress, paths []string, parentID *restic.ID) (*restic.Snapshot, restic.ID, error) {
+func (arch *Archiver) Snapshot(p *restic.Progress, paths, tags []string, parentID *restic.ID) (*restic.Snapshot, restic.ID, error) {
 	paths = unique(paths)
 	sort.Sort(baseNameSlice(paths))
 
@@ -649,7 +649,7 @@ func (arch *Archiver) Snapshot(p *restic.Progress, paths []string, parentID *res
 	defer p.Done()
 
 	// create new snapshot
-	sn, err := restic.NewSnapshot(paths)
+	sn, err := restic.NewSnapshot(paths, tags)
 	if err != nil {
 		return nil, restic.ID{}, err
 	}

src/restic/archiver/archiver_test.go

@@ -104,7 +104,7 @@ func archiveDirectory(b testing.TB) {
 
 	arch := archiver.New(repo)
 
-	_, id, err := arch.Snapshot(nil, []string{BenchArchiveDirectory}, nil)
+	_, id, err := arch.Snapshot(nil, []string{BenchArchiveDirectory}, nil, nil)
 	OK(b, err)
 
 	b.Logf("snapshot archived as %v", id)

src/restic/archiver/testing.go

@@ -8,7 +8,7 @@ import (
 // TestSnapshot creates a new snapshot of path.
 func TestSnapshot(t testing.TB, repo restic.Repository, path string, parent *restic.ID) *restic.Snapshot {
 	arch := New(repo)
-	sn, _, err := arch.Snapshot(nil, []string{path}, parent)
+	sn, _, err := arch.Snapshot(nil, []string{path}, []string{"test"}, parent)
 	if err != nil {
 		t.Fatal(err)
 	}

src/restic/checker/checker_test.go

@@ -247,7 +247,7 @@ func TestCheckerModifiedData(t *testing.T) {
 	test.OK(t, repo.Init(test.TestPassword))
 
 	arch := archiver.New(repo)
-	_, id, err := arch.Snapshot(nil, []string{"."}, nil)
+	_, id, err := arch.Snapshot(nil, []string{"."}, nil, nil)
 	test.OK(t, err)
 	t.Logf("archived as %v", id.Str())
 

src/restic/snapshot.go

@@ -21,13 +21,14 @@ type Snapshot struct {
 	UID      uint32    `json:"uid,omitempty"`
 	GID      uint32    `json:"gid,omitempty"`
 	Excludes []string  `json:"excludes,omitempty"`
+	Tags     []string  `json:"tags,omitempty"`
 
 	id *ID // plaintext ID, used during restore
 }
 
 // NewSnapshot returns an initialized snapshot struct for the current user and
 // time.
-func NewSnapshot(paths []string) (*Snapshot, error) {
+func NewSnapshot(paths []string, tags []string) (*Snapshot, error) {
 	for i, path := range paths {
 		if p, err := filepath.Abs(path); err != nil {
 			paths[i] = p
@@ -37,6 +38,7 @@ func NewSnapshot(paths []string) (*Snapshot, error) {
 	sn := &Snapshot{
 		Paths: paths,
 		Time:  time.Now(),
+		Tags:  tags,
 	}
 
 	hn, err := os.Hostname()
@@ -102,6 +104,22 @@ func (sn *Snapshot) fillUserInfo() error {
 	return err
 }
 
+// HasTags returns true if the snapshot has all the tags.
+func (sn *Snapshot) HasTags(tags []string) bool {
+nextTag:
+	for _, tag := range tags {
+		for _, snTag := range sn.Tags {
+			if tag == snTag {
+				continue nextTag
+			}
+		}
+
+		return false
+	}
+
+	return true
+}
+
 // SamePaths compares the Snapshot's paths and provided paths are exactly the same
 func SamePaths(expected, actual []string) bool {
 	if expected == nil || actual == nil {

src/restic/snapshot_filter.go

@@ -31,6 +31,7 @@ type SnapshotFilter struct {
 	Hostname string
 	Username string
 	Paths    []string
+	Tags     []string
 }
 
 // FilterSnapshots returns the snapshots from s which match the filter f.
@@ -48,6 +49,10 @@ func FilterSnapshots(s Snapshots, f SnapshotFilter) (result Snapshots) {
 			continue
 		}
 
+		if !snap.HasTags(f.Tags) {
+			continue
+		}
+
 		result = append(result, snap)
 	}
 
@@ -56,12 +61,13 @@ func FilterSnapshots(s Snapshots, f SnapshotFilter) (result Snapshots) {
 
 // ExpirePolicy configures which snapshots should be automatically removed.
 type ExpirePolicy struct {
-	Last    int // keep the last n snapshots
+	Last    int      // keep the last n snapshots
-	Hourly  int // keep the last n hourly snapshots
+	Hourly  int      // keep the last n hourly snapshots
-	Daily   int // keep the last n daily snapshots
+	Daily   int      // keep the last n daily snapshots
-	Weekly  int // keep the last n weekly snapshots
+	Weekly  int      // keep the last n weekly snapshots
-	Monthly int // keep the last n monthly snapshots
+	Monthly int      // keep the last n monthly snapshots
-	Yearly  int // keep the last n yearly snapshots
+	Yearly  int      // keep the last n yearly snapshots
+	Tags    []string // keep all snapshots with these tags
 }
 
 // Sum returns the maximum number of snapshots to be kept according to this
@@ -72,8 +78,12 @@ func (e ExpirePolicy) Sum() int {
 
 // Empty returns true iff no policy has been configured (all values zero).
 func (e ExpirePolicy) Empty() bool {
+	if len(e.Tags) != 0 {
+		return false
+	}
+
 	empty := ExpirePolicy{}
-	return e == empty
+	return reflect.DeepEqual(e, empty)
 }
 
 // filter is used to split a list of snapshots into those to keep and those to
@@ -161,6 +171,23 @@ func (f *filter) apply(fn func(time.Time) int, max int) {
 	}
 }
 
+// keepTags marks the snapshots which have all tags as to be kept.
+func (f *filter) keepTags(tags []string) {
+	if len(tags) == 0 {
+		return
+	}
+
+	unprocessed := f.Unprocessed[:0]
+	for _, sn := range f.Unprocessed {
+		if sn.HasTags(tags) {
+			f.Keep = append(f.Keep, sn)
+			continue
+		}
+		unprocessed = append(unprocessed, sn)
+	}
+	f.Unprocessed = unprocessed
+}
+
 // keepLast marks the last n snapshots as to be kept.
 func (f *filter) keepLast(n int) {
 	if n > len(f.Unprocessed) {
@@ -195,6 +222,7 @@ func ApplyPolicy(list Snapshots, p ExpirePolicy) (keep, remove Snapshots) {
 		Keep:        Snapshots{},
 	}
 
+	f.keepTags(p.Tags)
 	f.keepLast(p.Last)
 	f.apply(ymdh, p.Hourly)
 	f.apply(ymd, p.Daily)

src/restic/snapshot_filter_test.go

@@ -22,25 +22,25 @@ func parseTimeUTC(s string) time.Time {
 }
 
 var testFilterSnapshots = restic.Snapshots{
-	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-01 01:02:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-01 01:02:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"foo"}},
-	{Hostname: "bar", Username: "testuser", Time: parseTimeUTC("2016-01-01 01:03:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "bar", Username: "testuser", Time: parseTimeUTC("2016-01-01 01:03:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"foo"}},
-	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-03 07:02:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-03 07:02:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"foo"}},
-	{Hostname: "bar", Username: "testuser", Time: parseTimeUTC("2016-01-01 07:08:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "bar", Username: "testuser", Time: parseTimeUTC("2016-01-01 07:08:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"foo"}},
-	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-04 10:23:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-04 10:23:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"foo"}},
-	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-04 11:23:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-04 11:23:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"foo"}},
-	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-04 12:23:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-04 12:23:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"foo"}},
-	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-04 12:24:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-04 12:24:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"test"}},
-	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-04 12:28:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-04 12:28:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"test"}},
-	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-04 12:30:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-04 12:30:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"test", "foo", "bar"}},
-	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-04 16:23:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-04 16:23:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"test", "test2"}},
-	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-05 09:02:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-05 09:02:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"foo"}},
-	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-06 08:02:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-06 08:02:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"fox"}},
-	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-07 10:02:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-07 10:02:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"fox"}},
-	{Hostname: "foo", Username: "root", Time: parseTimeUTC("2016-01-08 20:02:03"), Paths: []string{"/usr", "/sbin"}},
+	{Hostname: "foo", Username: "root", Time: parseTimeUTC("2016-01-08 20:02:03"), Paths: []string{"/usr", "/sbin"}, Tags: []string{"foo"}},
-	{Hostname: "foo", Username: "root", Time: parseTimeUTC("2016-01-09 21:02:03"), Paths: []string{"/usr", "/sbin"}},
+	{Hostname: "foo", Username: "root", Time: parseTimeUTC("2016-01-09 21:02:03"), Paths: []string{"/usr", "/sbin"}, Tags: []string{"fox"}},
-	{Hostname: "bar", Username: "root", Time: parseTimeUTC("2016-01-12 21:02:03"), Paths: []string{"/usr", "/sbin"}},
+	{Hostname: "bar", Username: "root", Time: parseTimeUTC("2016-01-12 21:02:03"), Paths: []string{"/usr", "/sbin"}, Tags: []string{"foo"}},
-	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-12 21:08:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-12 21:08:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"bar"}},
-	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-18 12:02:03"), Paths: []string{"/usr", "/bin"}},
+	{Hostname: "foo", Username: "testuser", Time: parseTimeUTC("2016-01-18 12:02:03"), Paths: []string{"/usr", "/bin"}, Tags: []string{"bar"}},
 }
 
 var filterTests = []restic.SnapshotFilter{
@@ -50,6 +50,10 @@ var filterTests = []restic.SnapshotFilter{
 	{Paths: []string{"/usr", "/bin"}},
 	{Hostname: "bar", Paths: []string{"/usr", "/bin"}},
 	{Hostname: "foo", Username: "root", Paths: []string{"/usr", "/sbin"}},
+	{Tags: []string{"foo"}},
+	{Tags: []string{"fox"}, Username: "root"},
+	{Tags: []string{"foo", "test"}},
+	{Tags: []string{"foo", "test2"}},
 }
 
 func TestFilterSnapshots(t *testing.T) {
@@ -108,20 +112,20 @@ var testExpireSnapshots = restic.Snapshots{
 	{Time: parseTimeUTC("2014-08-20 10:20:30")},
 	{Time: parseTimeUTC("2014-08-21 10:20:30")},
 	{Time: parseTimeUTC("2014-08-22 10:20:30")},
-	{Time: parseTimeUTC("2014-10-01 10:20:30")},
+	{Time: parseTimeUTC("2014-10-01 10:20:30"), Tags: []string{"foo"}},
-	{Time: parseTimeUTC("2014-10-02 10:20:30")},
+	{Time: parseTimeUTC("2014-10-02 10:20:30"), Tags: []string{"foo"}},
-	{Time: parseTimeUTC("2014-10-05 10:20:30")},
+	{Time: parseTimeUTC("2014-10-05 10:20:30"), Tags: []string{"foo"}},
-	{Time: parseTimeUTC("2014-10-06 10:20:30")},
+	{Time: parseTimeUTC("2014-10-06 10:20:30"), Tags: []string{"foo"}},
-	{Time: parseTimeUTC("2014-10-08 10:20:30")},
+	{Time: parseTimeUTC("2014-10-08 10:20:30"), Tags: []string{"foo"}},
-	{Time: parseTimeUTC("2014-10-09 10:20:30")},
+	{Time: parseTimeUTC("2014-10-09 10:20:30"), Tags: []string{"foo"}},
-	{Time: parseTimeUTC("2014-10-10 10:20:30")},
+	{Time: parseTimeUTC("2014-10-10 10:20:30"), Tags: []string{"foo"}},
-	{Time: parseTimeUTC("2014-10-11 10:20:30")},
+	{Time: parseTimeUTC("2014-10-11 10:20:30"), Tags: []string{"foo"}},
-	{Time: parseTimeUTC("2014-10-20 10:20:30")},
+	{Time: parseTimeUTC("2014-10-20 10:20:30"), Tags: []string{"foo"}},
-	{Time: parseTimeUTC("2014-10-22 10:20:30")},
+	{Time: parseTimeUTC("2014-10-22 10:20:30"), Tags: []string{"foo"}},
-	{Time: parseTimeUTC("2014-11-08 10:20:30")},
+	{Time: parseTimeUTC("2014-11-08 10:20:30"), Tags: []string{"foo"}},
-	{Time: parseTimeUTC("2014-11-10 10:20:30")},
+	{Time: parseTimeUTC("2014-11-10 10:20:30"), Tags: []string{"foo"}},
-	{Time: parseTimeUTC("2014-11-12 10:20:30")},
+	{Time: parseTimeUTC("2014-11-12 10:20:30"), Tags: []string{"foo"}},
-	{Time: parseTimeUTC("2014-11-13 10:20:30")},
+	{Time: parseTimeUTC("2014-11-13 10:20:30"), Tags: []string{"foo"}},
 	{Time: parseTimeUTC("2014-11-13 10:20:30")},
 	{Time: parseTimeUTC("2014-11-15 10:20:30")},
 	{Time: parseTimeUTC("2014-11-18 10:20:30")},
@@ -208,6 +212,7 @@ var expireTests = []restic.ExpirePolicy{
 	{Daily: 2, Weekly: 2, Monthly: 6},
 	{Yearly: 10},
 	{Daily: 7, Weekly: 2, Monthly: 3, Yearly: 10},
+	{Tags: []string{"foo"}},
 }
 
 func TestApplyPolicy(t *testing.T) {
@@ -228,13 +233,13 @@ func TestApplyPolicy(t *testing.T) {
 		}
 
 		for _, sn := range keep {
-			t.Logf("test %d:     keep snapshot at %v\n", i, sn.Time)
+			t.Logf("test %d:     keep snapshot at %v %s\n", i, sn.Time, sn.Tags)
 		}
 		for _, sn := range remove {
-			t.Logf("test %d:   forget snapshot at %v\n", i, sn.Time)
+			t.Logf("test %d:   forget snapshot at %v %s\n", i, sn.Time, sn.Tags)
 		}
 
-		goldenFilename := filepath.Join("testdata", fmt.Sprintf("expired_snapshots_%d", i))
+		goldenFilename := filepath.Join("testdata", fmt.Sprintf("policy_keep_snapshots_%d", i))
 
 		if *updateGoldenFiles {
 			buf, err := json.MarshalIndent(keep, "", "  ")

src/restic/snapshot_test.go

@@ -10,6 +10,6 @@ import (
 func TestNewSnapshot(t *testing.T) {
 	paths := []string{"/home/foobar"}
 
-	_, err := restic.NewSnapshot(paths)
+	_, err := restic.NewSnapshot(paths, nil)
 	OK(t, err)
 }

src/restic/testdata/filter_snapshots_0

@@ -7,7 +7,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "bar"
+    ]
   },
   {
     "time": "2016-01-12T21:08:03Z",
@@ -17,7 +20,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "bar"
+    ]
   },
   {
     "time": "2016-01-09T21:02:03Z",
@@ -27,7 +33,10 @@
       "/sbin"
     ],
     "hostname": "foo",
-    "username": "root"
+    "username": "root",
+    "tags": [
+      "fox"
+    ]
   },
   {
     "time": "2016-01-08T20:02:03Z",
@@ -37,7 +46,10 @@
       "/sbin"
     ],
     "hostname": "foo",
-    "username": "root"
+    "username": "root",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-07T10:02:03Z",
@@ -47,7 +59,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "fox"
+    ]
   },
   {
     "time": "2016-01-06T08:02:03Z",
@@ -57,7 +72,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "fox"
+    ]
   },
   {
     "time": "2016-01-05T09:02:03Z",
@@ -67,7 +85,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-04T16:23:03Z",
@@ -77,7 +98,11 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "test",
+      "test2"
+    ]
   },
   {
     "time": "2016-01-04T12:30:03Z",
@@ -87,7 +112,12 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "test",
+      "foo",
+      "bar"
+    ]
   },
   {
     "time": "2016-01-04T12:28:03Z",
@@ -97,7 +127,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "test"
+    ]
   },
   {
     "time": "2016-01-04T12:24:03Z",
@@ -107,7 +140,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "test"
+    ]
   },
   {
     "time": "2016-01-04T12:23:03Z",
@@ -117,7 +153,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-04T11:23:03Z",
@@ -127,7 +166,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-04T10:23:03Z",
@@ -137,7 +179,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-03T07:02:03Z",
@@ -147,7 +192,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-01T01:02:03Z",
@@ -157,6 +205,9 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   }
 ]

src/restic/testdata/filter_snapshots_1

@@ -7,7 +7,10 @@
       "/sbin"
     ],
     "hostname": "bar",
-    "username": "root"
+    "username": "root",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-09T21:02:03Z",
@@ -17,7 +20,10 @@
       "/sbin"
     ],
     "hostname": "foo",
-    "username": "root"
+    "username": "root",
+    "tags": [
+      "fox"
+    ]
   },
   {
     "time": "2016-01-08T20:02:03Z",
@@ -27,6 +33,9 @@
       "/sbin"
     ],
     "hostname": "foo",
-    "username": "root"
+    "username": "root",
+    "tags": [
+      "foo"
+    ]
   }
 ]

src/restic/testdata/filter_snapshots_2

@@ -7,7 +7,10 @@
       "/sbin"
     ],
     "hostname": "foo",
-    "username": "root"
+    "username": "root",
+    "tags": [
+      "fox"
+    ]
   },
   {
     "time": "2016-01-08T20:02:03Z",
@@ -17,6 +20,9 @@
       "/sbin"
     ],
     "hostname": "foo",
-    "username": "root"
+    "username": "root",
+    "tags": [
+      "foo"
+    ]
   }
 ]

src/restic/testdata/filter_snapshots_3

@@ -7,7 +7,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "bar"
+    ]
   },
   {
     "time": "2016-01-12T21:08:03Z",
@@ -17,7 +20,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "bar"
+    ]
   },
   {
     "time": "2016-01-07T10:02:03Z",
@@ -27,7 +33,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "fox"
+    ]
   },
   {
     "time": "2016-01-06T08:02:03Z",
@@ -37,7 +46,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "fox"
+    ]
   },
   {
     "time": "2016-01-05T09:02:03Z",
@@ -47,7 +59,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-04T16:23:03Z",
@@ -57,7 +72,11 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "test",
+      "test2"
+    ]
   },
   {
     "time": "2016-01-04T12:30:03Z",
@@ -67,7 +86,12 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "test",
+      "foo",
+      "bar"
+    ]
   },
   {
     "time": "2016-01-04T12:28:03Z",
@@ -77,7 +101,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "test"
+    ]
   },
   {
     "time": "2016-01-04T12:24:03Z",
@@ -87,7 +114,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "test"
+    ]
   },
   {
     "time": "2016-01-04T12:23:03Z",
@@ -97,7 +127,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-04T11:23:03Z",
@@ -107,7 +140,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-04T10:23:03Z",
@@ -117,7 +153,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-03T07:02:03Z",
@@ -127,7 +166,10 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-01T07:08:03Z",
@@ -137,7 +179,10 @@
       "/bin"
     ],
     "hostname": "bar",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-01T01:03:03Z",
@@ -147,7 +192,10 @@
       "/bin"
     ],
     "hostname": "bar",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-01T01:02:03Z",
@@ -157,6 +205,9 @@
       "/bin"
     ],
     "hostname": "foo",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   }
 ]

src/restic/testdata/filter_snapshots_4

@@ -7,7 +7,10 @@
       "/bin"
     ],
     "hostname": "bar",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2016-01-01T01:03:03Z",
@@ -17,6 +20,9 @@
       "/bin"
     ],
     "hostname": "bar",
-    "username": "testuser"
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
   }
 ]

src/restic/testdata/filter_snapshots_5

@@ -7,7 +7,10 @@
       "/sbin"
     ],
     "hostname": "foo",
-    "username": "root"
+    "username": "root",
+    "tags": [
+      "fox"
+    ]
   },
   {
     "time": "2016-01-08T20:02:03Z",
@@ -17,6 +20,9 @@
       "/sbin"
     ],
     "hostname": "foo",
-    "username": "root"
+    "username": "root",
+    "tags": [
+      "foo"
+    ]
   }
 ]

src/restic/testdata/filter_snapshots_6

@@ -0,0 +1,147 @@
+[
+  {
+    "time": "2016-01-12T21:02:03Z",
+    "tree": null,
+    "paths": [
+      "/usr",
+      "/sbin"
+    ],
+    "hostname": "bar",
+    "username": "root",
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2016-01-08T20:02:03Z",
+    "tree": null,
+    "paths": [
+      "/usr",
+      "/sbin"
+    ],
+    "hostname": "foo",
+    "username": "root",
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2016-01-05T09:02:03Z",
+    "tree": null,
+    "paths": [
+      "/usr",
+      "/bin"
+    ],
+    "hostname": "foo",
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2016-01-04T12:30:03Z",
+    "tree": null,
+    "paths": [
+      "/usr",
+      "/bin"
+    ],
+    "hostname": "foo",
+    "username": "testuser",
+    "tags": [
+      "test",
+      "foo",
+      "bar"
+    ]
+  },
+  {
+    "time": "2016-01-04T12:23:03Z",
+    "tree": null,
+    "paths": [
+      "/usr",
+      "/bin"
+    ],
+    "hostname": "foo",
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2016-01-04T11:23:03Z",
+    "tree": null,
+    "paths": [
+      "/usr",
+      "/bin"
+    ],
+    "hostname": "foo",
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2016-01-04T10:23:03Z",
+    "tree": null,
+    "paths": [
+      "/usr",
+      "/bin"
+    ],
+    "hostname": "foo",
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2016-01-03T07:02:03Z",
+    "tree": null,
+    "paths": [
+      "/usr",
+      "/bin"
+    ],
+    "hostname": "foo",
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2016-01-01T07:08:03Z",
+    "tree": null,
+    "paths": [
+      "/usr",
+      "/bin"
+    ],
+    "hostname": "bar",
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2016-01-01T01:03:03Z",
+    "tree": null,
+    "paths": [
+      "/usr",
+      "/bin"
+    ],
+    "hostname": "bar",
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2016-01-01T01:02:03Z",
+    "tree": null,
+    "paths": [
+      "/usr",
+      "/bin"
+    ],
+    "hostname": "foo",
+    "username": "testuser",
+    "tags": [
+      "foo"
+    ]
+  }
+]

src/restic/testdata/filter_snapshots_7

@@ -0,0 +1,15 @@
+[
+  {
+    "time": "2016-01-09T21:02:03Z",
+    "tree": null,
+    "paths": [
+      "/usr",
+      "/sbin"
+    ],
+    "hostname": "foo",
+    "username": "root",
+    "tags": [
+      "fox"
+    ]
+  }
+]

src/restic/testdata/filter_snapshots_8

@@ -0,0 +1,17 @@
+[
+  {
+    "time": "2016-01-04T12:30:03Z",
+    "tree": null,
+    "paths": [
+      "/usr",
+      "/bin"
+    ],
+    "hostname": "foo",
+    "username": "testuser",
+    "tags": [
+      "test",
+      "foo",
+      "bar"
+    ]
+  }
+]

src/restic/testdata/filter_snapshots_9

@@ -0,0 +1 @@
+null

src/restic/testdata/policy_keep_snapshots_0

@@ -327,72 +327,114 @@
   {
     "time": "2014-11-13T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-11-12T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-11-10T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-11-08T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-22T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-20T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-11T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-10T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-09T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-08T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-06T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-05T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-02T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-01T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-09-22T10:20:30Z",

src/restic/testdata/policy_keep_snapshots_15

@@ -47,6 +47,9 @@
   {
     "time": "2014-10-22T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   }
 ]

src/restic/testdata/policy_keep_snapshots_18

@@ -0,0 +1,114 @@
+[
+  {
+    "time": "2014-11-13T10:20:30Z",
+    "tree": null,
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2014-11-12T10:20:30Z",
+    "tree": null,
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2014-11-10T10:20:30Z",
+    "tree": null,
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2014-11-08T10:20:30Z",
+    "tree": null,
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2014-10-22T10:20:30Z",
+    "tree": null,
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2014-10-20T10:20:30Z",
+    "tree": null,
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2014-10-11T10:20:30Z",
+    "tree": null,
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2014-10-10T10:20:30Z",
+    "tree": null,
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2014-10-09T10:20:30Z",
+    "tree": null,
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2014-10-08T10:20:30Z",
+    "tree": null,
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2014-10-06T10:20:30Z",
+    "tree": null,
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2014-10-05T10:20:30Z",
+    "tree": null,
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2014-10-02T10:20:30Z",
+    "tree": null,
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
+  },
+  {
+    "time": "2014-10-01T10:20:30Z",
+    "tree": null,
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
+  }
+]

src/restic/testdata/policy_keep_snapshots_3

@@ -327,72 +327,114 @@
   {
     "time": "2014-11-13T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-11-12T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-11-10T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-11-08T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-22T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-20T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-11T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-10T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-09T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-08T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-06T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-05T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-02T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-01T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-09-22T10:20:30Z",

src/restic/testdata/policy_keep_snapshots_4

@@ -327,72 +327,114 @@
   {
     "time": "2014-11-13T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-11-12T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-11-10T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-11-08T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-22T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-20T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-11T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-10T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-09T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-08T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-06T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-05T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-02T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-10-01T10:20:30Z",
     "tree": null,
-    "paths": null
+    "paths": null,
+    "tags": [
+      "foo"
+    ]
   },
   {
     "time": "2014-09-22T10:20:30Z",

src/restic/testing.go

@@ -154,7 +154,7 @@ func TestCreateSnapshot(t testing.TB, repo Repository, at time.Time, depth int,
 	t.Logf("create fake snapshot at %s with seed %d", at, seed)
 
 	fakedir := fmt.Sprintf("fakedir-at-%v", at.Format("2006-01-02 15:04:05"))
-	snapshot, err := NewSnapshot([]string{fakedir})
+	snapshot, err := NewSnapshot([]string{fakedir}, []string{"test"})
 	if err != nil {
 		t.Fatal(err)
 	}

src/restic/walk/walk_test.go

@@ -24,7 +24,7 @@ func TestWalkTree(t *testing.T) {
 
 	// archive a few files
 	arch := archiver.New(repo)
-	sn, _, err := arch.Snapshot(nil, dirs, nil)
+	sn, _, err := arch.Snapshot(nil, dirs, nil, nil)
 	OK(t, err)
 
 	// flush repo, write all packs