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Add walk for trees, restructure

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This commit is contained in:
Alexander Neumann 2015-03-02 14:48:47 +01:00
parent c8be54564f
commit f167366be5
12 changed files with 564 additions and 171 deletions
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308
archiver.go
View file

@ -7,6 +7,7 @@ import (
"io"
"os"
"path/filepath"
"sort"
"sync"
"github.com/juju/arrar"
@ -415,134 +416,201 @@ func (arch *Archiver) saveTree(p *Progress, t *Tree) (Blob, error) {
return blob, nil
}
func (arch *Archiver) Snapshot(p *Progress, path string, parentSnapshot backend.ID) (*Snapshot, backend.ID, error) {
func (arch *Archiver) fileWorker(wg *sync.WaitGroup, p *Progress, done <-chan struct{}, entCh <-chan pipe.Entry) {
defer wg.Done()
for {
select {
case e, ok := <-entCh:
if !ok {
// channel is closed
return
}
node, err := NodeFromFileInfo(e.Path, e.Info)
if err != nil {
panic(err)
}
if node.Type == "file" {
node.blobs, err = arch.SaveFile(p, node)
if err != nil {
panic(err)
}
}
e.Result <- node
p.Report(Stat{Files: 1})
case <-done:
// pipeline was cancelled
return
}
}
}
func (arch *Archiver) dirWorker(wg *sync.WaitGroup, p *Progress, done <-chan struct{}, dirCh <-chan pipe.Dir) {
defer wg.Done()
for {
select {
case dir, ok := <-dirCh:
if !ok {
// channel is closed
return
}
debug.Log("Archiver.DirWorker", "save dir %v\n", dir.Path)
tree := NewTree()
// wait for all content
for _, ch := range dir.Entries {
node := (<-ch).(*Node)
tree.Insert(node)
if node.Type == "dir" {
debug.Log("Archiver.DirWorker", "got tree node for %s: %v", node.path, node.blobs)
}
for _, blob := range node.blobs {
tree.Map.Insert(blob)
arch.m.Insert(blob)
}
}
node, err := NodeFromFileInfo(dir.Path, dir.Info)
if err != nil {
node.Error = err.Error()
dir.Result <- node
continue
}
blob, err := arch.SaveTreeJSON(tree)
if err != nil {
panic(err)
}
debug.Log("Archiver.DirWorker", "save tree for %s: %v", dir.Path, blob)
node.Subtree = blob.ID
node.blobs = Blobs{blob}
dir.Result <- node
p.Report(Stat{Dirs: 1})
case <-done:
// pipeline was cancelled
return
}
}
}
func compareWithOldTree(newCh <-chan interface{}, oldCh <-chan WalkTreeJob, outCh chan<- interface{}) {
debug.Log("Archiver.compareWithOldTree", "start")
defer func() {
debug.Log("Archiver.compareWithOldTree", "done")
}()
for {
debug.Log("Archiver.compareWithOldTree", "waiting for new job")
newJob, ok := <-newCh
if !ok {
// channel is closed
return
}
debug.Log("Archiver.compareWithOldTree", "received new job %v", newJob)
oldJob, ok := <-oldCh
if !ok {
// channel is closed
return
}
debug.Log("Archiver.compareWithOldTree", "received old job %v", oldJob)
outCh <- newJob
}
}
func (arch *Archiver) Snapshot(p *Progress, paths []string, parentSnapshot backend.ID) (*Snapshot, backend.ID, error) {
debug.Log("Archiver.Snapshot", "start for %v", paths)
debug.Break("Archiver.Snapshot")
sort.Strings(paths)
p.Start()
defer p.Done()
sn, err := NewSnapshot(path)
sn, err := NewSnapshot(paths)
if err != nil {
return nil, nil, err
}
sn.Parent = parentSnapshot
// load parent snapshot
// var oldRoot backend.ID
// if parentSnapshot != nil {
// sn.Parent = parentSnapshot
// parentSn, err := LoadSnapshot(arch.s, parentSnapshot)
// if err != nil {
// return nil, nil, err
// }
// oldRoot = parentSn.Tree.Storage
// }
// signal the whole pipeline to stop
done := make(chan struct{})
entCh := make(chan pipe.Entry)
dirCh := make(chan pipe.Dir)
fileWorker := func(wg *sync.WaitGroup, done <-chan struct{}, entCh <-chan pipe.Entry) {
defer wg.Done()
for {
select {
case e, ok := <-entCh:
if !ok {
// channel is closed
return
}
node, err := NodeFromFileInfo(e.Path, e.Info)
if err != nil {
panic(err)
}
if node.Type == "file" {
node.blobs, err = arch.SaveFile(p, node)
if err != nil {
panic(err)
}
}
e.Result <- node
p.Report(Stat{Files: 1})
case <-done:
// pipeline was cancelled
return
}
}
}
dirWorker := func(wg *sync.WaitGroup, done <-chan struct{}, dirCh <-chan pipe.Dir) {
defer wg.Done()
for {
select {
case dir, ok := <-dirCh:
if !ok {
// channel is closed
return
}
tree := NewTree()
// wait for all content
for _, ch := range dir.Entries {
node := (<-ch).(*Node)
tree.Insert(node)
if node.Type == "dir" {
debug.Log("Archiver.DirWorker", "got tree node for %s: %v", node.path, node.blobs)
}
for _, blob := range node.blobs {
tree.Map.Insert(blob)
arch.m.Insert(blob)
}
}
node, err := NodeFromFileInfo(dir.Path, dir.Info)
if err != nil {
node.Error = err.Error()
dir.Result <- node
continue
}
blob, err := arch.SaveTreeJSON(tree)
if err != nil {
panic(err)
}
debug.Log("Archiver.DirWorker", "save tree for %s: %v", dir.Path, blob)
node.Subtree = blob.ID
node.blobs = Blobs{blob}
dir.Result <- node
p.Report(Stat{Dirs: 1})
case <-done:
// pipeline was cancelled
return
}
}
}
// if we have an old root, start walker and comparer
// oldTreeCh := make(chan WalkTreeJob)
// if oldRoot != nil {
// // start walking the old tree
// debug.Log("Archiver.Snapshot", "start comparer for old root %v", oldRoot.Str())
// go WalkTree(arch.s, oldRoot, done, oldTreeCh)
// }
var wg sync.WaitGroup
entCh := make(chan pipe.Entry)
dirCh := make(chan pipe.Dir)
jobsCh := make(chan interface{})
// split
wg.Add(1)
go func() {
pipe.Split(jobsCh, dirCh, entCh)
close(dirCh)
close(entCh)
wg.Done()
}()
// run workers
for i := 0; i < maxConcurrency; i++ {
wg.Add(2)
go fileWorker(&wg, done, entCh)
go dirWorker(&wg, done, dirCh)
go arch.fileWorker(&wg, p, done, entCh)
go arch.dirWorker(&wg, p, done, dirCh)
}
resCh, err := pipe.Walk(path, done, entCh, dirCh)
// start walker
resCh, err := pipe.Walk(paths, done, jobsCh)
if err != nil {
close(done)
debug.Log("Archiver.Snapshot", "pipe.Walke returned error %v", err)
return nil, nil, err
}
// wait for all workers to terminate
debug.Log("Archiver.Snapshot", "wait for workers")
wg.Wait()
if err != nil {
return nil, nil, err
}
debug.Log("Archiver.Snapshot", "workers terminated")
// wait for top-level node
node := (<-resCh).(*Node)
// add tree for top-level directory
// add the top-level tree
tree := NewTree()
tree.Insert(node)
for _, blob := range node.blobs {
blob = arch.m.Insert(blob)
tree.Map.Insert(blob)
root := (<-resCh).(pipe.Dir)
for i := 0; i < len(paths); i++ {
node := (<-root.Entries[i]).(*Node)
debug.Log("Archiver.Snapshot", "got toplevel node %v", node)
tree.Insert(node)
for _, blob := range node.blobs {
blob = arch.m.Insert(blob)
tree.Map.Insert(blob)
}
}
tb, err := arch.SaveTreeJSON(tree)
@ -565,27 +633,33 @@ func isFile(fi os.FileInfo) bool {
return fi.Mode()&(os.ModeType|os.ModeCharDevice) == 0
}
func Scan(dir string, p *Progress) (Stat, error) {
func Scan(dirs []string, p *Progress) (Stat, error) {
p.Start()
defer p.Done()
var stat Stat
err := filepath.Walk(dir, func(str string, fi os.FileInfo, err error) error {
s := Stat{}
if isFile(fi) {
s.Files++
s.Bytes += uint64(fi.Size())
} else if fi.IsDir() {
s.Dirs++
for _, dir := range dirs {
err := filepath.Walk(dir, func(str string, fi os.FileInfo, err error) error {
s := Stat{}
if isFile(fi) {
s.Files++
s.Bytes += uint64(fi.Size())
} else if fi.IsDir() {
s.Dirs++
}
p.Report(s)
stat.Add(s)
// TODO: handle error?
return nil
})
if err != nil {
return Stat{}, err
}
}
p.Report(s)
stat.Add(s)
// TODO: handle error?
return nil
})
return stat, err
return stat, nil
}

8
archiver_test.go
View file

@ -138,7 +138,7 @@ func BenchmarkArchiveDirectory(b *testing.B) {
arch, err := restic.NewArchiver(server)
ok(b, err)
_, id, err := arch.Snapshot(nil, *benchArchiveDirectory, nil)
_, id, err := arch.Snapshot(nil, []string{*benchArchiveDirectory}, nil)
b.Logf("snapshot archived as %v", id)
}
@ -147,7 +147,7 @@ func snapshot(t testing.TB, server restic.Server, path string) *restic.Snapshot
arch, err := restic.NewArchiver(server)
ok(t, err)
ok(t, arch.Preload(nil))
sn, _, err := arch.Snapshot(nil, path, nil)
sn, _, err := arch.Snapshot(nil, []string{path}, nil)
ok(t, err)
return sn
}
@ -215,7 +215,7 @@ func BenchmarkPreload(t *testing.B) {
// archive a few files
arch, err := restic.NewArchiver(server)
ok(t, err)
sn, _, err := arch.Snapshot(nil, *benchArchiveDirectory, nil)
sn, _, err := arch.Snapshot(nil, []string{*benchArchiveDirectory}, nil)
ok(t, err)
t.Logf("archived snapshot %v", sn.ID())
@ -243,7 +243,7 @@ func BenchmarkLoadTree(t *testing.B) {
// archive a few files
arch, err := restic.NewArchiver(server)
ok(t, err)
sn, _, err := arch.Snapshot(nil, *benchArchiveDirectory, nil)
sn, _, err := arch.Snapshot(nil, []string{*benchArchiveDirectory}, nil)
ok(t, err)
t.Logf("archived snapshot %v", sn.ID())

47
cmd/restic/cmd_backup.go
View file

@ -1,9 +1,9 @@
package main
import (
"errors"
"fmt"
"os"
"path/filepath"
"strings"
"time"
@ -12,7 +12,9 @@ import (
"golang.org/x/crypto/ssh/terminal"
)
type CmdBackup struct{}
type CmdBackup struct {
Parent string `short:"p" long:"parent" description:"use this parent snapshot (default: not set)"`
}
func init() {
_, err := parser.AddCommand("backup",
@ -167,10 +169,18 @@ func newArchiveProgress(todo restic.Stat) *restic.Progress {
}
func (cmd CmdBackup) Execute(args []string) error {
if len(args) == 0 || len(args) > 2 {
if len(args) == 0 {
return fmt.Errorf("wrong number of parameters, Usage: %s", cmd.Usage())
}
target := make([]string, 0, len(args))
for _, d := range args {
if a, err := filepath.Abs(d); err == nil {
d = a
}
target = append(target, d)
}
s, err := OpenRepo()
if err != nil {
return err
@ -178,17 +188,16 @@ func (cmd CmdBackup) Execute(args []string) error {
var parentSnapshotID backend.ID
target := args[0]
if len(args) > 1 {
parentSnapshotID, err = s.FindSnapshot(args[1])
if cmd.Parent != "" {
parentSnapshotID, err = s.FindSnapshot(cmd.Parent)
if err != nil {
return fmt.Errorf("invalid id %q: %v", args[1], err)
return fmt.Errorf("invalid id %q: %v", cmd.Parent, err)
}
fmt.Printf("found parent snapshot %v\n", parentSnapshotID)
}
fmt.Printf("scan %s\n", target)
fmt.Printf("scan %v\n", target)
stat, err := restic.Scan(target, newScanProgress())
@ -197,10 +206,6 @@ func (cmd CmdBackup) Execute(args []string) error {
// return true
// }
if parentSnapshotID != nil {
return errors.New("not implemented")
}
arch, err := restic.NewArchiver(s)
if err != nil {
fmt.Fprintf(os.Stderr, "err: %v\n", err)
@ -212,16 +217,16 @@ func (cmd CmdBackup) Execute(args []string) error {
return nil
}
fmt.Printf("loading blobs\n")
pb, err := newLoadBlobsProgress(s)
if err != nil {
return err
}
// fmt.Printf("loading blobs\n")
// pb, err := newLoadBlobsProgress(s)
// if err != nil {
// return err
// }
err = arch.Preload(pb)
if err != nil {
return err
}
// err = arch.Preload(pb)
// if err != nil {
// return err
// }
_, id, err := arch.Snapshot(newArchiveProgress(stat), target, parentSnapshotID)
if err != nil {

2
cmd/restic/cmd_ls.go
View file

@ -86,7 +86,7 @@ func (cmd CmdLs) Execute(args []string) error {
return err
}
fmt.Printf("snapshot of %s at %s:\n", sn.Dir, sn.Time)
fmt.Printf("snapshot of %v at %s:\n", sn.Paths, sn.Time)
return print_tree("", s, sn.Tree)
}

11
cmd/restic/cmd_snapshots.go
View file

@ -128,7 +128,16 @@ func (cmd CmdSnapshots) Execute(args []string) error {
}
for _, sn := range list {
tab.Rows = append(tab.Rows, []interface{}{sn.ID()[:plen], sn.Time.Format(TimeFormat), sn.Hostname, sn.Dir})
if len(sn.Paths) == 0 {
continue
}
tab.Rows = append(tab.Rows, []interface{}{sn.ID()[:plen], sn.Time.Format(TimeFormat), sn.Hostname, sn.Paths[0]})
if len(sn.Paths) > 1 {
for _, path := range sn.Paths {
tab.Rows = append(tab.Rows, []interface{}{"", "", "", path})
}
}
}
tab.Write(os.Stdout)

96
pipe/pipe.go
View file

@ -5,6 +5,8 @@ import (
"os"
"path/filepath"
"sort"
"github.com/restic/restic/debug"
)
type Entry struct {
@ -48,14 +50,15 @@ func isFile(fi os.FileInfo) bool {
return fi.Mode()&(os.ModeType|os.ModeCharDevice) == 0
}
func walk(path string, done chan struct{}, entCh chan<- Entry, dirCh chan<- Dir, res chan<- interface{}) error {
func walk(path string, done chan struct{}, jobs chan<- interface{}, res chan<- interface{}) error {
info, err := os.Lstat(path)
if err != nil {
return err
}
if !info.IsDir() {
return fmt.Errorf("path is not a directory, cannot walk: %s", path)
jobs <- Entry{Info: info, Path: path, Result: res}
return nil
}
names, err := readDirNames(path)
@ -78,26 +81,95 @@ func walk(path string, done chan struct{}, entCh chan<- Entry, dirCh chan<- Dir,
}
if isDir(fi) {
err = walk(subpath, done, entCh, dirCh, ch)
err = walk(subpath, done, jobs, ch)
if err != nil {
return err
}
} else {
entCh <- Entry{Info: fi, Path: subpath, Result: ch}
jobs <- Entry{Info: fi, Path: subpath, Result: ch}
}
}
dirCh <- Dir{Path: path, Info: info, Entries: entries, Result: res}
jobs <- Dir{Path: path, Info: info, Entries: entries, Result: res}
return nil
}
// Walk takes a path and sends a Job for each file and directory it finds below
// the path. When the channel done is closed, processing stops.
func Walk(path string, done chan struct{}, entCh chan<- Entry, dirCh chan<- Dir) (<-chan interface{}, error) {
// 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<- interface{}) (<-chan interface{}, error) {
resCh := make(chan interface{}, 1)
err := walk(path, done, entCh, dirCh, resCh)
close(entCh)
close(dirCh)
return resCh, err
defer func() {
close(resCh)
close(jobs)
debug.Log("pipe.Walk", "output channel closed")
}()
entries := make([]<-chan interface{}, 0, len(paths))
for _, path := range paths {
debug.Log("pipe.Walk", "start walker for %v", path)
ch := make(chan interface{}, 1)
entries = append(entries, ch)
err := walk(path, done, jobs, ch)
if err != nil {
return nil, err
}
debug.Log("pipe.Walk", "walker for %v done", path)
}
resCh <- Dir{Entries: entries}
return resCh, nil
}
// Split feeds all elements read from inChan to dirChan and entChan.
func Split(inChan <-chan interface{}, dirChan chan<- Dir, entChan chan<- Entry) {
debug.Log("pipe.Split", "start")
defer debug.Log("pipe.Split", "done")
inCh := inChan
dirCh := dirChan
entCh := entChan
var (
dir Dir
ent Entry
)
// deactivate sending until we received at least one job
dirCh = nil
entCh = nil
for {
select {
case job, ok := <-inCh:
if !ok {
// channel is closed
return
}
if job == nil {
panic("nil job received")
}
// disable receiving until the current job has been sent
inCh = nil
switch j := job.(type) {
case Dir:
dir = j
dirCh = dirChan
case Entry:
ent = j
entCh = entChan
default:
panic(fmt.Sprintf("unknown job type %v", j))
}
case dirCh <- dir:
// disable sending, re-enable receiving
dirCh = nil
inCh = inChan
case entCh <- ent:
// disable sending, re-enable receiving
entCh = nil
inCh = inChan
}
}
}

104
pipe/pipe_test.go
View file

@ -43,9 +43,9 @@ func statPath(path string) (stats, error) {
return s, err
}
func TestPipelineWalker(t *testing.T) {
func TestPipelineWalkerWithSplit(t *testing.T) {
if *testWalkerPath == "" {
t.Skipf("walkerpah not set, skipping TestPipelineWalker")
t.Skipf("walkerpath not set, skipping TestPipelineWalker")
}
before, err := statPath(*testWalkerPath)
@ -106,7 +106,92 @@ func TestPipelineWalker(t *testing.T) {
go worker(&wg, done, entCh, dirCh)
}
resCh, err := pipe.Walk(*testWalkerPath, done, entCh, dirCh)
jobs := make(chan interface{}, 200)
wg.Add(1)
go func() {
pipe.Split(jobs, dirCh, entCh)
close(entCh)
close(dirCh)
wg.Done()
}()
resCh, err := pipe.Walk([]string{*testWalkerPath}, done, jobs)
ok(t, err)
// wait for all workers to terminate
wg.Wait()
// wait for top-level blob
<-resCh
t.Logf("walked path %s with %d dirs, %d files", *testWalkerPath,
after.dirs, after.files)
assert(t, before == after, "stats do not match, expected %v, got %v", before, after)
}
func TestPipelineWalker(t *testing.T) {
if *testWalkerPath == "" {
t.Skipf("walkerpath not set, skipping TestPipelineWalker")
}
before, err := statPath(*testWalkerPath)
ok(t, err)
t.Logf("walking path %s with %d dirs, %d files", *testWalkerPath,
before.dirs, before.files)
after := stats{}
m := sync.Mutex{}
worker := func(wg *sync.WaitGroup, done <-chan struct{}, jobs <-chan interface{}) {
defer wg.Done()
for {
select {
case job, ok := <-jobs:
if !ok {
// channel is closed
return
}
assert(t, job != nil, "job is nil")
switch j := job.(type) {
case pipe.Dir:
// wait for all content
for _, ch := range j.Entries {
<-ch
}
m.Lock()
after.dirs++
m.Unlock()
j.Result <- true
case pipe.Entry:
m.Lock()
after.files++
m.Unlock()
j.Result <- true
}
case <-done:
// pipeline was cancelled
return
}
}
}
var wg sync.WaitGroup
done := make(chan struct{})
jobs := make(chan interface{})
for i := 0; i < *maxWorkers; i++ {
wg.Add(1)
go worker(&wg, done, jobs)
}
resCh, err := pipe.Walk([]string{*testWalkerPath}, done, jobs)
ok(t, err)
// wait for all workers to terminate
@ -123,7 +208,7 @@ func TestPipelineWalker(t *testing.T) {
func BenchmarkPipelineWalker(b *testing.B) {
if *testWalkerPath == "" {
b.Skipf("walkerpah not set, skipping BenchPipelineWalker")
b.Skipf("walkerpath not set, skipping BenchPipelineWalker")
}
var max time.Duration
@ -196,7 +281,16 @@ func BenchmarkPipelineWalker(b *testing.B) {
go fileWorker(&wg, done, entCh)
}
resCh, err := pipe.Walk(*testWalkerPath, done, entCh, dirCh)
jobs := make(chan interface{}, 200)
wg.Add(1)
go func() {
pipe.Split(jobs, dirCh, entCh)
close(entCh)
close(dirCh)
wg.Done()
}()
resCh, err := pipe.Walk([]string{*testWalkerPath}, done, jobs)
ok(b, err)
// wait for all workers to terminate

2
restorer.go
View file

@ -46,7 +46,7 @@ func (res *Restorer) to(dst string, dir string, treeBlob Blob) error {
dstpath := filepath.Join(dst, dir, node.Name)
if res.Filter == nil ||
res.Filter(filepath.Join(res.sn.Dir, dir, node.Name), dstpath, node) {
res.Filter(filepath.Join(dir, node.Name), dstpath, node) {
err := CreateNodeAt(node, tree.Map, res.s, dstpath)
// Did it fail because of ENOENT?

17
snapshot.go
View file

@ -13,7 +13,7 @@ type Snapshot struct {
Time time.Time `json:"time"`
Parent backend.ID `json:"parent,omitempty"`
Tree Blob `json:"tree"`
Dir string `json:"dir"`
Paths []string `json:"paths"`
Hostname string `json:"hostname,omitempty"`
Username string `json:"username,omitempty"`
UID uint32 `json:"uid,omitempty"`
@ -24,15 +24,16 @@ type Snapshot struct {
id backend.ID // plaintext ID, used during restore
}
func NewSnapshot(dir string) (*Snapshot, error) {
d, err := filepath.Abs(dir)
if err != nil {
d = dir
func NewSnapshot(paths []string) (*Snapshot, error) {
for i, path := range paths {
if p, err := filepath.Abs(path); err != nil {
paths[i] = p
}
}
sn := &Snapshot{
Dir: d,
Time: time.Now(),
Paths: paths,
Time: time.Now(),
}
hn, err := os.Hostname()
@ -59,7 +60,7 @@ func LoadSnapshot(s Server, id backend.ID) (*Snapshot, error) {
}
func (sn Snapshot) String() string {
return fmt.Sprintf("<Snapshot %q at %s>", sn.Dir, sn.Time)
return fmt.Sprintf("<Snapshot of %v at %s>", sn.Paths, sn.Time)
}
func (sn Snapshot) ID() backend.ID {

2
snapshot_test.go
View file

@ -9,7 +9,7 @@ import (
func testSnapshot(t *testing.T, s restic.Server) {
var err error
sn, err := restic.NewSnapshot("/home/foobar")
sn, err := restic.NewSnapshot([]string{"/home/foobar"})
ok(t, err)
// sn.Tree, err = restic.Blob{ID: backend.ParseID("c3ab8ff13720e8ad9047dd39466b3c8974e592c2fa383d4a3960714caef0c4f2")}
// ok(t, err)

55
walk.go Normal file
View file

@ -0,0 +1,55 @@
package restic
import (
"path/filepath"
"github.com/restic/restic/backend"
"github.com/restic/restic/debug"
)
type WalkTreeJob struct {
Path string
Error error
Node *Node
Tree *Tree
}
func walkTree(s Server, path string, id backend.ID, done chan struct{}, jobCh chan<- WalkTreeJob) {
debug.Log("walkTree", "start on %q (%v)", path, id.Str())
// load tree
t, err := LoadTree(s, id)
if err != nil {
jobCh <- WalkTreeJob{Path: path, Error: err}
return
}
for _, node := range t.Nodes {
p := filepath.Join(path, node.Name)
if node.Type == "dir" {
blob, err := t.Map.FindID(node.Subtree)
if err != nil {
jobCh <- WalkTreeJob{Path: p, Error: err}
continue
}
walkTree(s, p, blob.Storage, done, jobCh)
} else {
jobCh <- WalkTreeJob{Path: p, Node: node}
}
}
if path != "" {
jobCh <- WalkTreeJob{Path: filepath.Join(path), Tree: t}
}
debug.Log("walkTree", "done for %q (%v)", path, id.Str())
}
// WalkTree walks the tree specified by ID recursively and sends a job for each
// file and directory it finds. When the channel done is closed, processing
// stops.
func WalkTree(server Server, id backend.ID, done chan struct{}, jobCh chan<- WalkTreeJob) {
debug.Log("WalkTree", "start on %v", id.Str())
walkTree(server, "", id, done, jobCh)
close(jobCh)
debug.Log("WalkTree", "done", id.Str())
}

83
walk_test.go Normal file
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package restic_test
import (
"flag"
"path/filepath"
"testing"
"github.com/restic/restic"
"github.com/restic/restic/pipe"
)
var testWalkDirectory = flag.String("test.walkdir", ".", "test walking a directory (globbing pattern, default: .)")
func TestWalkTree(t *testing.T) {
dirs, err := filepath.Glob(*testWalkDirectory)
ok(t, err)
be := setupBackend(t)
defer teardownBackend(t, be)
key := setupKey(t, be, "geheim")
server := restic.NewServerWithKey(be, key)
// archive a few files
arch, err := restic.NewArchiver(server)
ok(t, err)
sn, _, err := arch.Snapshot(nil, dirs, nil)
ok(t, err)
// start benchmark
// t.ResetTimer()
// for i := 0; i < t.N; i++ {
done := make(chan struct{})
// start tree walker
treeJobs := make(chan restic.WalkTreeJob)
go restic.WalkTree(server, sn.Tree.Storage, done, treeJobs)
// start filesystem walker
fsJobs := make(chan interface{})
go pipe.Walk(dirs, done, fsJobs)
for {
// receive fs job
fsJob, fsChOpen := <-fsJobs
assert(t, !fsChOpen || fsJob != nil,
"received nil job from filesystem: %v %v", fsJob, fsChOpen)
var path string
fsEntries := 1
switch j := fsJob.(type) {
case pipe.Dir:
path = j.Path
fsEntries = len(j.Entries)
case pipe.Entry:
path = j.Path
}
// receive tree job
treeJob, treeChOpen := <-treeJobs
treeEntries := 1
if treeJob.Tree != nil {
treeEntries = len(treeJob.Tree.Nodes)
}
assert(t, fsChOpen == treeChOpen,
"one channel closed too early: fsChOpen %v, treeChOpen %v",
fsChOpen, treeChOpen)
if !fsChOpen || !treeChOpen {
break
}
assert(t, filepath.Base(path) == filepath.Base(treeJob.Path),
"paths do not match: %q != %q", filepath.Base(path), filepath.Base(treeJob.Path))
assert(t, fsEntries == treeEntries,
"wrong number of entries: %v != %v", fsEntries, treeEntries)
}
// }
}