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Add exclude filter to archiver and 'backup' command

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This commit is contained in:
Alexander Neumann 2015-07-20 00:13:39 +02:00
parent 0d8bad273d
commit 7fd52f9f57
9 changed files with 179 additions and 36 deletions
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19
archiver.go
View file

@ -34,8 +34,8 @@ type Archiver struct {
blobToken chan struct{}
Error func(dir string, fi os.FileInfo, err error) error
Filter func(item string, fi os.FileInfo) bool
Error func(dir string, fi os.FileInfo, err error) error
SelectFilter pipe.SelectFunc
}
// NewArchiver returns a new archiver.
@ -50,7 +50,7 @@ func NewArchiver(repo *repository.Repository) *Archiver {
}
arch.Error = archiverAbortOnAllErrors
arch.Filter = archiverAllowAllFiles
arch.SelectFilter = archiverAllowAllFiles
return arch
}
@ -577,7 +577,7 @@ func (arch *Archiver) Snapshot(p *Progress, paths []string, parentID backend.ID)
pipeCh := make(chan pipe.Job)
resCh := make(chan pipe.Result, 1)
go func() {
err := pipe.Walk(paths, done, pipeCh, resCh)
err := pipe.Walk(paths, arch.SelectFilter, done, pipeCh, resCh)
if err != nil {
debug.Log("Archiver.Snapshot", "pipe.Walk returned error %v", err)
return
@ -659,7 +659,7 @@ func isRegularFile(fi os.FileInfo) bool {
// Scan traverses the dirs to collect Stat information while emitting progress
// information with p.
func Scan(dirs []string, p *Progress) (Stat, error) {
func Scan(dirs []string, filter pipe.SelectFunc, p *Progress) (Stat, error) {
p.Start()
defer p.Done()
@ -678,6 +678,15 @@ func Scan(dirs []string, p *Progress) (Stat, error) {
fmt.Fprintf(os.Stderr, "error for %v: FileInfo is nil\n", str)
return nil
}
if !filter(str, fi) {
debug.Log("Scan.Walk", "path %v excluded", str)
if fi.IsDir() {
return filepath.SkipDir
}
return nil
}
s := Stat{}
if fi.IsDir() {
s.Dirs++

24
cmd/restic/cmd_backup.go
View file

@ -10,13 +10,15 @@ import (
"github.com/restic/restic"
"github.com/restic/restic/backend"
"github.com/restic/restic/filter"
"github.com/restic/restic/repository"
"golang.org/x/crypto/ssh/terminal"
)
type CmdBackup struct {
Parent string `short:"p" long:"parent" description:"use this parent snapshot (default: last snapshot in repo that has the same target)"`
Force bool `short:"f" long:"force" description:"Force re-reading the target. Overrides the \"parent\" flag"`
Parent string `short:"p" long:"parent" description:"use this parent snapshot (default: last snapshot in repo that has the same target)"`
Force bool `short:"f" long:"force" description:"Force re-reading the target. Overrides the \"parent\" flag"`
Exclude []string `short:"e" long:"exclude" description:"Exclude a pattern (can be specified multiple times)"`
global *GlobalOptions
}
@ -282,14 +284,22 @@ func (cmd CmdBackup) Execute(args []string) error {
cmd.global.Verbosef("scan %v\n", target)
stat, err := restic.Scan(target, cmd.newScanProgress())
selectFilter := func(item string, fi os.FileInfo) bool {
matched, err := filter.List(cmd.Exclude, item)
if err != nil {
cmd.global.Warnf("error for exclude pattern: %v", err)
}
// TODO: add filter
// arch.Filter = func(dir string, fi os.FileInfo) bool {
// return true
// }
return !matched
}
stat, err := restic.Scan(target, selectFilter, cmd.newScanProgress())
if err != nil {
return err
}
arch := restic.NewArchiver(repo)
arch.SelectFilter = selectFilter
arch.Error = func(dir string, fi os.FileInfo, err error) error {
// TODO: make ignoring errors configurable

18
cmd/restic/cmd_ls.go
View file

@ -11,6 +11,8 @@ import (
)
type CmdLs struct {
Long bool `short:"l" long:"long" description:"Use a long listing format showing size and mode"`
global *GlobalOptions
}
@ -24,7 +26,11 @@ func init() {
}
}
func printNode(prefix string, n *restic.Node) string {
func (cmd CmdLs) printNode(prefix string, n *restic.Node) string {
if !cmd.Long {
return filepath.Join(prefix, n.Name)
}
switch n.Type {
case "file":
return fmt.Sprintf("%s %5d %5d %6d %s %s",
@ -40,17 +46,17 @@ func printNode(prefix string, n *restic.Node) string {
}
}
func printTree(prefix string, repo *repository.Repository, id backend.ID) error {
func (cmd CmdLs) printTree(prefix string, repo *repository.Repository, id backend.ID) error {
tree, err := restic.LoadTree(repo, id)
if err != nil {
return err
}
for _, entry := range tree.Nodes {
fmt.Println(printNode(prefix, entry))
cmd.global.Printf(cmd.printNode(prefix, entry) + "\n")
if entry.Type == "dir" && entry.Subtree != nil {
err = printTree(filepath.Join(prefix, entry.Name), repo, entry.Subtree)
err = cmd.printTree(filepath.Join(prefix, entry.Name), repo, entry.Subtree)
if err != nil {
return err
}
@ -89,7 +95,7 @@ func (cmd CmdLs) Execute(args []string) error {
return err
}
fmt.Printf("snapshot of %v at %s:\n", sn.Paths, sn.Time)
cmd.global.Verbosef("snapshot of %v at %s:\n", sn.Paths, sn.Time)
return printTree("", repo, sn.Tree)
return cmd.printTree("", repo, sn.Tree)
}

97
cmd/restic/integration_test.go
View file

@ -10,6 +10,7 @@ import (
"os"
"path/filepath"
"regexp"
"strings"
"syscall"
"testing"
"time"
@ -44,7 +45,11 @@ func cmdInit(t testing.TB, global GlobalOptions) {
}
func cmdBackup(t testing.TB, global GlobalOptions, target []string, parentID backend.ID) {
cmd := &CmdBackup{global: &global}
cmdBackupExcludes(t, global, target, parentID, nil)
}
func cmdBackupExcludes(t testing.TB, global GlobalOptions, target []string, parentID backend.ID, excludes []string) {
cmd := &CmdBackup{global: &global, Exclude: excludes}
cmd.Parent = parentID.String()
t.Logf("backing up %v", target)
@ -73,6 +78,16 @@ func cmdCheck(t testing.TB, global GlobalOptions) {
OK(t, cmd.Execute(nil))
}
func cmdLs(t testing.TB, global GlobalOptions, snapshotID string) []string {
var buf bytes.Buffer
global.stdout = &buf
cmd := &CmdLs{global: &global}
OK(t, cmd.Execute([]string{snapshotID}))
return strings.Split(string(buf.Bytes()), "\n")
}
func TestBackup(t *testing.T) {
withTestEnvironment(t, func(env *testEnvironment, global GlobalOptions) {
datafile := filepath.Join("testdata", "backup-data.tar.gz")
@ -237,6 +252,86 @@ func TestBackupMissingFile2(t *testing.T) {
})
}
func includes(haystack []string, needle string) bool {
for _, s := range haystack {
if s == needle {
return true
}
}
return false
}
func loadSnapshotMap(t testing.TB, global GlobalOptions) map[string]struct{} {
snapshotIDs := cmdList(t, global, "snapshots")
m := make(map[string]struct{})
for _, id := range snapshotIDs {
m[id.String()] = struct{}{}
}
return m
}
func lastSnapshot(old, new map[string]struct{}) (map[string]struct{}, string) {
for k := range new {
if _, ok := old[k]; !ok {
old[k] = struct{}{}
return old, k
}
}
return old, ""
}
var backupExcludeFilenames = []string{
"testfile1",
"foo.tar.gz",
"private/secret/passwords.txt",
"work/source/test.c",
}
func TestBackupExclude(t *testing.T) {
withTestEnvironment(t, func(env *testEnvironment, global GlobalOptions) {
cmdInit(t, global)
datadir := filepath.Join(env.base, "testdata")
for _, filename := range backupExcludeFilenames {
fp := filepath.Join(datadir, filename)
OK(t, os.MkdirAll(filepath.Dir(fp), 0755))
f, err := os.Create(fp)
OK(t, err)
fmt.Fprintf(f, filename)
OK(t, f.Close())
}
snapshots := make(map[string]struct{})
cmdBackup(t, global, []string{datadir}, nil)
snapshots, snapshotID := lastSnapshot(snapshots, loadSnapshotMap(t, global))
files := cmdLs(t, global, snapshotID)
Assert(t, includes(files, filepath.Join("testdata", "foo.tar.gz")),
"expected file %q in first snapshot, but it's not included", "foo.tar.gz")
cmdBackupExcludes(t, global, []string{datadir}, nil, []string{"*.tar.gz"})
snapshots, snapshotID = lastSnapshot(snapshots, loadSnapshotMap(t, global))
files = cmdLs(t, global, snapshotID)
Assert(t, !includes(files, filepath.Join("testdata", "foo.tar.gz")),
"expected file %q not in first snapshot, but it's included", "foo.tar.gz")
cmdBackupExcludes(t, global, []string{datadir}, nil, []string{"*.tar.gz", "private/secret"})
snapshots, snapshotID = lastSnapshot(snapshots, loadSnapshotMap(t, global))
files = cmdLs(t, global, snapshotID)
Assert(t, !includes(files, filepath.Join("testdata", "foo.tar.gz")),
"expected file %q not in first snapshot, but it's included", "foo.tar.gz")
Assert(t, !includes(files, filepath.Join("testdata", "private", "secret", "passwords.txt")),
"expected file %q not in first snapshot, but it's included", "passwords.txt")
})
}
const (
incrementalFirstWrite = 20 * 1042 * 1024
incrementalSecondWrite = 12 * 1042 * 1024

4
filter/filter.go
View file

@ -91,8 +91,8 @@ func match(patterns, strs []string) (matched bool, err error) {
return false, nil
}
// MatchList returns true if str matches one of the patterns.
func MatchList(patterns []string, str string) (matched bool, err error) {
// List returns true if str matches one of the patterns.
func List(patterns []string, str string) (matched bool, err error) {
for _, pat := range patterns {
matched, err = Match(pat, str)
if err != nil {

6
filter/filter_test.go
View file

@ -121,7 +121,7 @@ var filterListTests = []struct {
func TestMatchList(t *testing.T) {
for i, test := range filterListTests {
match, err := filter.MatchList(test.patterns, test.path)
match, err := filter.List(test.patterns, test.path)
if err != nil {
t.Errorf("test %d failed: expected no error for patterns %q, but error returned: %v",
i, test.patterns, err)
@ -136,7 +136,7 @@ func TestMatchList(t *testing.T) {
}
func ExampleMatchList() {
match, _ := filter.MatchList([]string{"*.c", "*.go"}, "/home/user/file.go")
match, _ := filter.List([]string{"*.c", "*.go"}, "/home/user/file.go")
fmt.Printf("match: %v\n", match)
// Output:
// match: true
@ -235,7 +235,7 @@ func BenchmarkFilterPatterns(b *testing.B) {
for i := 0; i < b.N; i++ {
c = 0
for _, line := range lines {
match, err := filter.MatchList(patterns, line)
match, err := filter.List(patterns, line)
if err != nil {
b.Fatal(err)
}

28
pipe/pipe.go
View file

@ -82,13 +82,22 @@ func isFile(fi os.FileInfo) bool {
var errCancelled = errors.New("walk cancelled")
func walk(basedir, dir string, done chan struct{}, jobs chan<- Job, res chan<- Result) error {
// SelectFunc returns true for all items that should be included (files and
// dirs). If false is returned, files are ignored and dirs are not even walked.
type SelectFunc func(item string, fi os.FileInfo) bool
func walk(basedir, dir string, selectFunc SelectFunc, done chan struct{}, jobs chan<- Job, res chan<- Result) error {
info, err := os.Lstat(dir)
if err != nil {
debug.Log("pipe.walk", "error for %v: %v", dir, err)
return err
}
if !selectFunc(dir, info) {
debug.Log("pipe.walk", "file %v excluded by filter", dir)
return nil
}
relpath, _ := filepath.Rel(basedir, dir)
if !info.IsDir() {
@ -114,13 +123,18 @@ func walk(basedir, dir string, done chan struct{}, jobs chan<- Job, res chan<- R
for _, name := range names {
subpath := filepath.Join(dir, name)
fi, statErr := os.Lstat(subpath)
if !selectFunc(subpath, fi) {
debug.Log("pipe.walk", "file %v excluded by filter", subpath)
continue
}
ch := make(chan Result, 1)
entries = append(entries, ch)
fi, err := os.Lstat(subpath)
if err != nil {
if statErr != nil {
select {
case jobs <- Entry{info: fi, error: err, basedir: basedir, path: filepath.Join(relpath, name), result: ch}:
case jobs <- Entry{info: fi, error: statErr, basedir: basedir, path: filepath.Join(relpath, name), result: ch}:
case <-done:
return errCancelled
}
@ -132,7 +146,7 @@ func walk(basedir, dir string, done chan struct{}, jobs chan<- Job, res chan<- R
debug.RunHook("pipe.walk2", filepath.Join(relpath, name))
if isDir(fi) {
err = walk(basedir, subpath, done, jobs, ch)
err = walk(basedir, subpath, selectFunc, done, jobs, ch)
if err != nil {
return err
}
@ -156,7 +170,7 @@ func walk(basedir, dir string, done chan struct{}, jobs chan<- Job, res chan<- R
// Walk sends a Job for each file and directory it finds below the paths. When
// the channel done is closed, processing stops.
func Walk(paths []string, done chan struct{}, jobs chan<- Job, res chan<- Result) error {
func Walk(paths []string, selectFunc SelectFunc, done chan struct{}, jobs chan<- Job, res chan<- Result) error {
defer func() {
debug.Log("pipe.Walk", "output channel closed")
close(jobs)
@ -166,7 +180,7 @@ func Walk(paths []string, done chan struct{}, jobs chan<- Job, res chan<- Result
for _, path := range paths {
debug.Log("pipe.Walk", "start walker for %v", path)
ch := make(chan Result, 1)
err := walk(filepath.Dir(path), path, done, jobs, ch)
err := walk(filepath.Dir(path), path, selectFunc, done, jobs, ch)
if err != nil {
debug.Log("pipe.Walk", "error for %v: %v", path, err)
continue

12
pipe/pipe_test.go
View file

@ -19,6 +19,10 @@ type stats struct {
dirs, files int
}
func acceptAll(string, os.FileInfo) bool {
return true
}
func statPath(path string) (stats, error) {
var s stats
@ -118,7 +122,7 @@ func TestPipelineWalkerWithSplit(t *testing.T) {
}()
resCh := make(chan pipe.Result, 1)
err = pipe.Walk([]string{TestWalkerPath}, done, jobs, resCh)
err = pipe.Walk([]string{TestWalkerPath}, acceptAll, done, jobs, resCh)
OK(t, err)
// wait for all workers to terminate
@ -198,7 +202,7 @@ func TestPipelineWalker(t *testing.T) {
}
resCh := make(chan pipe.Result, 1)
err = pipe.Walk([]string{TestWalkerPath}, done, jobs, resCh)
err = pipe.Walk([]string{TestWalkerPath}, acceptAll, done, jobs, resCh)
OK(t, err)
// wait for all workers to terminate
@ -298,7 +302,7 @@ func BenchmarkPipelineWalker(b *testing.B) {
}()
resCh := make(chan pipe.Result, 1)
err := pipe.Walk([]string{TestWalkerPath}, done, jobs, resCh)
err := pipe.Walk([]string{TestWalkerPath}, acceptAll, done, jobs, resCh)
OK(b, err)
// wait for all workers to terminate
@ -375,7 +379,7 @@ func TestPipelineWalkerMultiple(t *testing.T) {
}
resCh := make(chan pipe.Result, 1)
err = pipe.Walk(paths, done, jobs, resCh)
err = pipe.Walk(paths, acceptAll, done, jobs, resCh)
OK(t, err)
// wait for all workers to terminate

7
walk_test.go
View file

@ -1,6 +1,7 @@
package restic_test
import (
"os"
"path/filepath"
"testing"
@ -33,7 +34,11 @@ func TestWalkTree(t *testing.T) {
// start filesystem walker
fsJobs := make(chan pipe.Job)
resCh := make(chan pipe.Result, 1)
go pipe.Walk(dirs, done, fsJobs, resCh)
f := func(string, os.FileInfo) bool {
return true
}
go pipe.Walk(dirs, f, done, fsJobs, resCh)
for {
// receive fs job