Golang BlobMap.ToSlice Examples

Example #1

File: model.go Project: pombredanne/bar

func (m *Model) SquashBlobs(blobs lists.BlobMap) (err error) {
	logx.Tracef("squashing blobs %s", blobs.IDMap())

	var req, res []interface{}
	for _, v := range blobs.ToSlice() {
		req = append(req, v)
	}

	err = m.BatchPool.Do(
		func(ctx context.Context, in interface{}) (out interface{}, err error) {
			r := in.(lists.BlobLink)

			lock, err := m.FdLocks.Take()
			if err != nil {
				return
			}
			defer lock.Release()

			absname := filepath.Join(m.WD, r.Name)
			backName := absname + ".bar-backup"
			os.Rename(absname, absname+".bar-backup")
			os.MkdirAll(filepath.Dir(absname), 0755)

			w, err := os.Create(absname)
			if err != nil {
				return
			}
			err = r.Manifest.Serialize(w)
			if err != nil {
				os.Remove(absname)
				os.Rename(backName, absname)
				return
			}
			defer os.Remove(backName)
			logx.Debugf("squashed %s", r.Name)
			return
		},
		&req, &res, concurrency.DefaultBatchOptions().AllowErrors(),
	)
	if err != nil {
		return
	}

	logx.Infof("blob %s squashed successfully", blobs.Names())
	return
}