func printPacks(repo *repository.Repository, wr io.Writer) error {
done := make(chan struct{})
defer close(done)
f := func(job worker.Job, done <-chan struct{}) (interface{}, error) {
name := job.Data.(string)
h := backend.Handle{Type: backend.Data, Name: name}
rd := backend.NewReadSeeker(repo.Backend(), h)
unpacker, err := pack.NewUnpacker(repo.Key(), rd)
if err != nil {
return nil, err
}
return unpacker.Entries, nil
}
jobCh := make(chan worker.Job)
resCh := make(chan worker.Job)
wp := worker.New(dumpPackWorkers, f, jobCh, resCh)
go func() {
for name := range repo.Backend().List(backend.Data, done) {
jobCh <- worker.Job{Data: name}
}
close(jobCh)
}()
for job := range resCh {
name := job.Data.(string)
if job.Error != nil {
fmt.Fprintf(os.Stderr, "error for pack %v: %v\n", name, job.Error)
continue
}
entries := job.Result.([]pack.Blob)
p := Pack{
Name: name,
Blobs: make([]Blob, len(entries)),
}
for i, blob := range entries {
p.Blobs[i] = Blob{
Type: blob.Type,
Length: blob.Length,
ID: blob.ID,
Offset: blob.Offset,
}
}
prettyPrintJSON(os.Stdout, p)
}
wp.Wait()
return nil
}
// ListPack returns the list of blobs saved in the pack id.
func (r *Repository) ListPack(id backend.ID) ([]pack.Blob, error) {
h := backend.Handle{Type: backend.Data, Name: id.String()}
rd := backend.NewReadSeeker(r.Backend(), h)
unpacker, err := pack.NewUnpacker(r.Key(), rd)
if err != nil {
return nil, err
}
return unpacker.Entries, nil
}
func TestUnpackReadSeeker(t *testing.T) {
// create random keys
k := crypto.NewRandomKey()
bufs, packData, packSize := newPack(t, k)
b := mem.New()
id := backend.Hash(packData)
handle := backend.Handle{Type: backend.Data, Name: id.String()}
OK(t, b.Save(handle, packData))
rd := backend.NewReadSeeker(b, handle)
verifyBlobs(t, bufs, k, rd, packSize)
}
func TestReadSeeker(t *testing.T) {
b := mem.New()
length := rand.Intn(1<<24) + 2000
data := Random(23, length)
id := backend.Hash(data)
handle := backend.Handle{Type: backend.Data, Name: id.String()}
err := b.Save(handle, data)
if err != nil {
t.Fatalf("Save() error: %v", err)
}
for i := 0; i < 50; i++ {
l := rand.Intn(length + 2000)
o := rand.Intn(length + 2000)
if rand.Float32() > 0.5 {
o = -o
}
d := data
if o > 0 && o < len(d) {
d = d[o:]
} else {
o = len(d)
d = d[:0]
}
if l > 0 && l < len(d) {
d = d[:l]
}
rd := backend.NewReadSeeker(b, handle)
loadAndCompare(t, rd, len(data), int64(o), d)
}
}