Golang StreamFormatter.FormatProgress方法代碼示例

func (srv *Server) pullImage(r *registry.Registry, out io.Writer, imgId, endpoint string, token []string, sf *utils.StreamFormatter) error {
	history, err := r.GetRemoteHistory(imgId, endpoint, token)
	if err != nil {
		return err
	}

	// FIXME: Try to stream the images?
	// FIXME: Launch the getRemoteImage() in goroutines
	for _, id := range history {
		if !srv.runtime.graph.Exists(id) {
			out.Write(sf.FormatStatus("Pulling %s metadata", id))
			imgJSON, imgSize, err := r.GetRemoteImageJSON(id, endpoint, token)
			if err != nil {
				// FIXME: Keep goging in case of error?
				return err
			}
			img, err := NewImgJSON(imgJSON)
			if err != nil {
				return fmt.Errorf("Failed to parse json: %s", err)
			}

			// Get the layer
			out.Write(sf.FormatStatus("Pulling %s fs layer", id))
			layer, err := r.GetRemoteImageLayer(img.ID, endpoint, token)
			if err != nil {
				return err
			}
			defer layer.Close()
			if err := srv.runtime.graph.Register(utils.ProgressReader(layer, imgSize, out, sf.FormatProgress("Downloading", "%v/%v (%v)"), sf), false, img); err != nil {
				return err
			}
		}
	}
	return nil
}

func (srv *Server) ImageInsert(name, url, path string, out io.Writer, sf *utils.StreamFormatter) (string, error) {
	out = utils.NewWriteFlusher(out)
	img, err := srv.runtime.repositories.LookupImage(name)
	if err != nil {
		return "", err
	}

	file, err := utils.Download(url, out)
	if err != nil {
		return "", err
	}
	defer file.Body.Close()

	config, _, _, err := ParseRun([]string{img.ID, "echo", "insert", url, path}, srv.runtime.capabilities)
	if err != nil {
		return "", err
	}

	b := NewBuilder(srv.runtime)
	c, err := b.Create(config)
	if err != nil {
		return "", err
	}

	if err := c.Inject(utils.ProgressReader(file.Body, int(file.ContentLength), out, sf.FormatProgress("Downloading", "%v/%v (%v)"), sf), path); err != nil {
		return "", err
	}
	// FIXME: Handle custom repo, tag comment, author
	img, err = b.Commit(c, "", "", img.Comment, img.Author, nil)
	if err != nil {
		return "", err
	}
	out.Write(sf.FormatStatus(img.ID))
	return img.ShortID(), nil
}

// TempLayerArchive creates a temporary archive of the given image's filesystem layer.
//   The archive is stored on disk and will be automatically deleted as soon as has been read.
//   If output is not nil, a human-readable progress bar will be written to it.
//   FIXME: does this belong in Graph? How about MktempFile, let the caller use it for archives?
func (graph *Graph) TempLayerArchive(id string, compression archive.Compression, sf *utils.StreamFormatter, output io.Writer) (*archive.TempArchive, error) {
	image, err := graph.Get(id)
	if err != nil {
		return nil, err
	}
	tmp, err := graph.tmp()
	if err != nil {
		return nil, err
	}
	a, err := image.TarLayer(compression)
	if err != nil {
		return nil, err
	}
	return archive.NewTempArchive(utils.ProgressReader(ioutil.NopCloser(a), 0, output, sf.FormatProgress("", "Buffering to disk", "%v/%v (%v)"), sf, true), tmp.Root)
}

func (srv *Server) ImageImport(src, repo, tag string, in io.Reader, out io.Writer, sf *utils.StreamFormatter) error {
	var archive io.Reader
	var resp *http.Response

	if src == "-" {
		archive = in
	} else {
		u, err := url.Parse(src)
		if err != nil {
			return err
		}
		if u.Scheme == "" {
			u.Scheme = "http"
			u.Host = src
			u.Path = ""
		}
		out.Write(sf.FormatStatus("Downloading from %s", u))
		// Download with curl (pretty progress bar)
		// If curl is not available, fallback to http.Get()
		resp, err = utils.Download(u.String(), out)
		if err != nil {
			return err
		}
		archive = utils.ProgressReader(resp.Body, int(resp.ContentLength), out, sf.FormatProgress("Importing", "%v/%v (%v)"), sf)
	}
	img, err := srv.runtime.graph.Create(archive, nil, "Imported from "+src, "", nil)
	if err != nil {
		return err
	}
	// Optionally register the image at REPO/TAG
	if repo != "" {
		if err := srv.runtime.repositories.Set(repo, tag, img.ID, true); err != nil {
			return err
		}
	}
	out.Write(sf.FormatStatus(img.ShortID()))
	return nil
}

func (srv *Server) pushImage(r *registry.Registry, out io.Writer, remote, imgId, ep string, token []string, sf *utils.StreamFormatter) error {
	out = utils.NewWriteFlusher(out)
	jsonRaw, err := ioutil.ReadFile(path.Join(srv.runtime.graph.Root, imgId, "json"))
	if err != nil {
		return fmt.Errorf("Error while retreiving the path for {%s}: %s", imgId, err)
	}
	out.Write(sf.FormatStatus("Pushing %s", imgId))

	// Make sure we have the image's checksum
	checksum, err := srv.getChecksum(imgId)
	if err != nil {
		return err
	}
	imgData := &registry.ImgData{
		ID:       imgId,
		Checksum: checksum,
	}

	// Send the json
	if err := r.PushImageJSONRegistry(imgData, jsonRaw, ep, token); err != nil {
		if err == registry.ErrAlreadyExists {
			out.Write(sf.FormatStatus("Image %s already uploaded ; skipping", imgData.ID))
			return nil
		}
		return err
	}

	// Retrieve the tarball to be sent
	var layerData *TempArchive
	// If the archive exists, use it
	file, err := os.Open(layerArchivePath(srv.runtime.graph.imageRoot(imgId)))
	if err != nil {
		if os.IsNotExist(err) {
			// If the archive does not exist, create one from the layer
			layerData, err = srv.runtime.graph.TempLayerArchive(imgId, Xz, out)
			if err != nil {
				return fmt.Errorf("Failed to generate layer archive: %s", err)
			}
		} else {
			return err
		}
	} else {
		defer file.Close()
		st, err := file.Stat()
		if err != nil {
			return err
		}
		layerData = &TempArchive{
			File: file,
			Size: st.Size(),
		}
	}

	// Send the layer
	if err := r.PushImageLayerRegistry(imgData.ID, utils.ProgressReader(layerData, int(layerData.Size), out, sf.FormatProgress("Pushing", "%v/%v (%v)"), sf), ep, token); err != nil {
		return err
	}
	return nil
}

func (srv *Server) pushImage(r *registry.Registry, out io.Writer, remote, imgID, ep string, token []string, sf *utils.StreamFormatter) (checksum string, err error) {
	out = utils.NewWriteFlusher(out)
	jsonRaw, err := ioutil.ReadFile(path.Join(srv.runtime.graph.Root, imgID, "json"))
	if err != nil {
		return "", fmt.Errorf("Error while retrieving the path for {%s}: %s", imgID, err)
	}
	out.Write(sf.FormatStatus("", "Pushing %s", imgID))

	imgData := &registry.ImgData{
		ID: imgID,
	}

	// Send the json
	if err := r.PushImageJSONRegistry(imgData, jsonRaw, ep, token); err != nil {
		if err == registry.ErrAlreadyExists {
			out.Write(sf.FormatStatus("", "Image %s already pushed, skipping", imgData.ID))
			return "", nil
		}
		return "", err
	}

	layerData, err := srv.runtime.graph.TempLayerArchive(imgID, Uncompressed, sf, out)
	if err != nil {
		return "", fmt.Errorf("Failed to generate layer archive: %s", err)
	}

	// Send the layer
	if checksum, err := r.PushImageLayerRegistry(imgData.ID, utils.ProgressReader(layerData, int(layerData.Size), out, sf.FormatProgress("", "Pushing", "%8v/%v (%v)"), sf, false), ep, token, jsonRaw); err != nil {
		return "", err
	} else {
		imgData.Checksum = checksum
	}
	out.Write(sf.FormatStatus("", ""))

	// Send the checksum
	if err := r.PushImageChecksumRegistry(imgData, ep, token); err != nil {
		return "", err
	}

	return imgData.Checksum, nil
}

func (srv *Server) pullRepository(r *registry.Registry, out io.Writer, localName, remoteName, askedTag, indexEp string, sf *utils.StreamFormatter, parallel bool) error {
	out.Write(sf.FormatStatus("", "Pulling repository %s", localName))

	repoData, err := r.GetRepositoryData(indexEp, remoteName)
	if err != nil {
		return err
	}

	utils.Debugf("Retrieving the tag list")
	tagsList, err := r.GetRemoteTags(repoData.Endpoints, remoteName, repoData.Tokens)
	if err != nil {
		utils.Debugf("%v", err)
		return err
	}

	for tag, id := range tagsList {
		repoData.ImgList[id] = &registry.ImgData{
			ID:       id,
			Tag:      tag,
			Checksum: "",
		}
	}

	utils.Debugf("Registering tags")
	// If no tag has been specified, pull them all
	if askedTag == "" {
		for tag, id := range tagsList {
			repoData.ImgList[id].Tag = tag
		}
	} else {
		// Otherwise, check that the tag exists and use only that one
		id, exists := tagsList[askedTag]
		if !exists {
			return fmt.Errorf("Tag %s not found in repository %s", askedTag, localName)
		}
		repoData.ImgList[id].Tag = askedTag
	}

	errors := make(chan error)
	for _, image := range repoData.ImgList {
		downloadImage := func(img *registry.ImgData) {
			if askedTag != "" && img.Tag != askedTag {
				utils.Debugf("(%s) does not match %s (id: %s), skipping", img.Tag, askedTag, img.ID)
				if parallel {
					errors <- nil
				}
				return
			}

			if img.Tag == "" {
				utils.Debugf("Image (id: %s) present in this repository but untagged, skipping", img.ID)
				if parallel {
					errors <- nil
				}
				return
			}

			// ensure no two downloads of the same image happen at the same time
			if err := srv.poolAdd("pull", "img:"+img.ID); err != nil {
				utils.Debugf("Image (id: %s) pull is already running, skipping: %v", img.ID, err)
				if parallel {
					errors <- nil
				}
				return
			}
			defer srv.poolRemove("pull", "img:"+img.ID)

			out.Write(sf.FormatProgress(utils.TruncateID(img.ID), "Pulling", fmt.Sprintf("image (%s) from %s", img.Tag, localName)))
			success := false
			var lastErr error
			for _, ep := range repoData.Endpoints {
				out.Write(sf.FormatProgress(utils.TruncateID(img.ID), "Pulling", fmt.Sprintf("image (%s) from %s, endpoint: %s", img.Tag, localName, ep)))
				if err := srv.pullImage(r, out, img.ID, ep, repoData.Tokens, sf); err != nil {
					// Its not ideal that only the last error  is returned, it would be better to concatenate the errors.
					// As the error is also given to the output stream the user will see the error.
					lastErr = err
					out.Write(sf.FormatProgress(utils.TruncateID(img.ID), "Error pulling", fmt.Sprintf("image (%s) from %s, endpoint: %s, %s", img.Tag, localName, ep, err)))
					continue
				}
				success = true
				break
			}
			if !success {
				out.Write(sf.FormatProgress(utils.TruncateID(img.ID), "Error pulling", fmt.Sprintf("image (%s) from %s, %s", img.Tag, localName, lastErr)))
				if parallel {
					errors <- fmt.Errorf("Could not find repository on any of the indexed registries.")
					return
				}
			}
			out.Write(sf.FormatProgress(utils.TruncateID(img.ID), "Download", "complete"))

			if parallel {
				errors <- nil
			}
		}

		if parallel {
			go downloadImage(image)
		} else {
			downloadImage(image)
//.........這裏部分代碼省略.........

func (srv *Server) pullImage(r *registry.Registry, out io.Writer, imgID, endpoint string, token []string, sf *utils.StreamFormatter) error {
	history, err := r.GetRemoteHistory(imgID, endpoint, token)
	if err != nil {
		return err
	}
	out.Write(sf.FormatProgress(utils.TruncateID(imgID), "Pulling", "dependend layers"))
	// FIXME: Try to stream the images?
	// FIXME: Launch the getRemoteImage() in goroutines

	for _, id := range history {

		// ensure no two downloads of the same layer happen at the same time
		if err := srv.poolAdd("pull", "layer:"+id); err != nil {
			utils.Debugf("Image (id: %s) pull is already running, skipping: %v", id, err)
			return nil
		}
		defer srv.poolRemove("pull", "layer:"+id)

		if !srv.runtime.graph.Exists(id) {
			out.Write(sf.FormatProgress(utils.TruncateID(id), "Pulling", "metadata"))
			imgJSON, imgSize, err := r.GetRemoteImageJSON(id, endpoint, token)
			if err != nil {
				out.Write(sf.FormatProgress(utils.TruncateID(id), "Error", "pulling dependend layers"))
				// FIXME: Keep going in case of error?
				return err
			}
			img, err := NewImgJSON(imgJSON)
			if err != nil {
				out.Write(sf.FormatProgress(utils.TruncateID(id), "Error", "pulling dependend layers"))
				return fmt.Errorf("Failed to parse json: %s", err)
			}

			// Get the layer
			out.Write(sf.FormatProgress(utils.TruncateID(id), "Pulling", "fs layer"))
			layer, err := r.GetRemoteImageLayer(img.ID, endpoint, token)
			if err != nil {
				out.Write(sf.FormatProgress(utils.TruncateID(id), "Error", "pulling dependend layers"))
				return err
			}
			defer layer.Close()
			if err := srv.runtime.graph.Register(imgJSON, utils.ProgressReader(layer, imgSize, out, sf.FormatProgress(utils.TruncateID(id), "Downloading", "%8v/%v (%v)"), sf, false), img); err != nil {
				out.Write(sf.FormatProgress(utils.TruncateID(id), "Error", "downloading dependend layers"))
				return err
			}
		}
		out.Write(sf.FormatProgress(utils.TruncateID(id), "Download", "complete"))

	}
	return nil
}

func (srv *Server) pullRepository(r *registry.Registry, out io.Writer, localName, remoteName, askedTag, indexEp string, sf *utils.StreamFormatter, parallel bool) error {
	out.Write(sf.FormatStatus("", "Pulling repository %s", localName))

	repoData, err := r.GetRepositoryData(indexEp, remoteName)
	if err != nil {
		return err
	}

	utils.Debugf("Retrieving the tag list")
	tagsList, err := r.GetRemoteTags(repoData.Endpoints, remoteName, repoData.Tokens)
	if err != nil {
		utils.Debugf("%v", err)
		return err
	}

	for tag, id := range tagsList {
		repoData.ImgList[id] = &registry.ImgData{
			ID:       id,
			Tag:      tag,
			Checksum: "",
		}
	}

	utils.Debugf("Registering tags")
	// If no tag has been specified, pull them all
	if askedTag == "" {
		for tag, id := range tagsList {
			repoData.ImgList[id].Tag = tag
		}
	} else {
		// Otherwise, check that the tag exists and use only that one
		id, exists := tagsList[askedTag]
		if !exists {
			return fmt.Errorf("Tag %s not found in repository %s", askedTag, localName)
		}
		repoData.ImgList[id].Tag = askedTag
	}

	errors := make(chan error)
	for _, image := range repoData.ImgList {
		downloadImage := func(img *registry.ImgData) {
			if askedTag != "" && img.Tag != askedTag {
				utils.Debugf("(%s) does not match %s (id: %s), skipping", img.Tag, askedTag, img.ID)
				errors <- nil
				return
			}

			if img.Tag == "" {
				utils.Debugf("Image (id: %s) present in this repository but untagged, skipping", img.ID)
				errors <- nil
				return
			}
			out.Write(sf.FormatProgress(utils.TruncateID(img.ID), "Pulling", fmt.Sprintf("image (%s) from %s", img.Tag, localName)))
			success := false
			for _, ep := range repoData.Endpoints {
				if err := srv.pullImage(r, out, img.ID, ep, repoData.Tokens, sf); err != nil {
					out.Write(sf.FormatStatus(utils.TruncateID(img.ID), "Error while retrieving image for tag: %s (%s); checking next endpoint", askedTag, err))
					continue
				}
				success = true
				break
			}
			if !success {
				errors <- fmt.Errorf("Could not find repository on any of the indexed registries.")
			}
			errors <- nil
		}

		if parallel {
			go downloadImage(image)
		} else {
			downloadImage(image)
		}
	}

	if parallel {
		for i := 0; i < len(repoData.ImgList); i++ {
			if err := <-errors; err != nil {
				return err
			}
		}
	}

	for tag, id := range tagsList {
		if askedTag != "" && tag != askedTag {
			continue
		}
		if err := srv.runtime.repositories.Set(localName, tag, id, true); err != nil {
			return err
		}
	}
	if err := srv.runtime.repositories.Save(); err != nil {
		return err
	}

	return nil
}