Golang archive.Tar函數代碼示例

func (container *Container) RwChecksum() (string, error) {
	rwData, err := archive.Tar(container.rwPath(), archive.Xz)
	if err != nil {
		return "", err
	}
	return utils.HashData(rwData)
}

// TarLayer returns a tar archive of the image's filesystem layer.
func (img *Image) TarLayer() (archive.Archive, error) {
	if img.graph == nil {
		return nil, fmt.Errorf("Can't load storage driver for unregistered image %s", img.ID)
	}
	driver := img.graph.driver
	if differ, ok := driver.(graphdriver.Differ); ok {
		return differ.Diff(img.ID)
	}

	imgFs, err := driver.Get(img.ID)
	if err != nil {
		return nil, err
	}
	if img.Parent == "" {
		return archive.Tar(imgFs, archive.Uncompressed)
	} else {
		parentFs, err := driver.Get(img.Parent)
		if err != nil {
			return nil, err
		}
		changes, err := archive.ChangesDirs(imgFs, parentFs)
		if err != nil {
			return nil, err
		}
		return archive.ExportChanges(imgFs, changes)
	}
}

// TarLayer returns a tar archive of the image's filesystem layer.
func (img *Image) TarLayer(compression archive.Compression) (archive.Archive, error) {
	layerPath, err := img.layer()
	if err != nil {
		return nil, err
	}
	return archive.Tar(layerPath, compression)
}

// Build the Image
func (c *ImageService) Build(tag, dir string) error {

	// tar the file
	context, err := archive.Tar(dir, archive.Uncompressed)
	if err != nil {
		return err
	}

	var body io.Reader
	body = ioutil.NopCloser(context)

	// Upload the build context
	v := url.Values{}
	v.Set("t", tag)
	v.Set("q", "1")
	v.Set("rm", "1")

	// url path
	path := fmt.Sprintf("/build?%s", v.Encode())

	// set content type to tar file
	headers := http.Header{}
	headers.Set("Content-Type", "application/tar")

	// make the request
	return c.stream("POST", path, body, os.Stdout, headers)
}

func (container *Container) Export() (archive.Archive, error) {
	if err := container.Mount(); err != nil {
		return nil, err
	}

	archive, err := archive.Tar(container.RootfsPath(), archive.Uncompressed)
	if err != nil {
		return nil, err
	}
	return EofReader(archive, func() { container.Unmount() }), nil
}

// hashPath calculates a strong hash (sha256) value for a file tree located
// at `basepth`/`pth`, including all attributes that would normally be
// captured by `tar`. The path to hash is passed in two pieces only to
// permit logging the second piece in isolation, assuming the first is a
// temporary directory in which docker is running. If `clobberTimes` is
// true and hashPath is applied to a single file, the ctime/atime/mtime of
// the file is considered to be unix time 0, for purposes of hashing.
func (b *buildFile) hashPath(basePth, pth string, clobberTimes bool) (string, error) {

	p := path.Join(basePth, pth)

	st, err := os.Stat(p)
	if err != nil {
		return "", err
	}

	h := sha256.New()

	if st.IsDir() {
		tarRd, err := archive.Tar(p, archive.Uncompressed)
		if err != nil {
			return "", err
		}
		_, err = io.Copy(h, tarRd)
		if err != nil {
			return "", err
		}

	} else {
		hdr, err := tar.FileInfoHeader(st, "")
		if err != nil {
			return "", err
		}
		if clobberTimes {
			hdr.AccessTime = time.Unix(0, 0)
			hdr.ChangeTime = time.Unix(0, 0)
			hdr.ModTime = time.Unix(0, 0)
		}
		hdr.Name = filepath.Base(p)
		tarWr := tar.NewWriter(h)
		if err := tarWr.WriteHeader(hdr); err != nil {
			return "", err
		}

		fileRd, err := os.Open(p)
		if err != nil {
			return "", err
		}

		if _, err = io.Copy(tarWr, fileRd); err != nil {
			return "", err
		}
		tarWr.Close()
	}

	hstr := hex.EncodeToString(h.Sum(nil))
	fmt.Fprintf(b.outStream, " ---> data at %s has sha256 %.12s...\n", pth, hstr)
	return hstr, nil
}

// TarLayer returns a tar archive of the image's filesystem layer.
func (img *Image) TarLayer() (arch archive.Archive, err error) {
	if img.graph == nil {
		return nil, fmt.Errorf("Can't load storage driver for unregistered image %s", img.ID)
	}
	driver := img.graph.Driver()
	if differ, ok := driver.(graphdriver.Differ); ok {
		return differ.Diff(img.ID)
	}

	imgFs, err := driver.Get(img.ID, "")
	if err != nil {
		return nil, err
	}

	defer func() {
		if err != nil {
			driver.Put(img.ID)
		}
	}()

	if img.Parent == "" {
		archive, err := archive.Tar(imgFs, archive.Uncompressed)
		if err != nil {
			return nil, err
		}
		return utils.NewReadCloserWrapper(archive, func() error {
			err := archive.Close()
			driver.Put(img.ID)
			return err
		}), nil
	}

	parentFs, err := driver.Get(img.Parent, "")
	if err != nil {
		return nil, err
	}
	defer driver.Put(img.Parent)
	changes, err := archive.ChangesDirs(imgFs, parentFs)
	if err != nil {
		return nil, err
	}
	archive, err := archive.ExportChanges(imgFs, changes)
	if err != nil {
		return nil, err
	}
	return utils.NewReadCloserWrapper(archive, func() error {
		err := archive.Close()
		driver.Put(img.ID)
		return err
	}), nil
}

func (container *Container) Export() (archive.Archive, error) {
	if err := container.Mount(); err != nil {
		return nil, err
	}

	archive, err := archive.Tar(container.basefs, archive.Uncompressed)
	if err != nil {
		container.Unmount()
		return nil, err
	}
	return utils.NewReadCloserWrapper(archive, func() error {
		err := archive.Close()
		container.Unmount()
		return err
	}), nil
}

func testContextTar(t *testing.T, compression archive.Compression) {
	contextDirectory := filepath.Join(workingDirectory, "build_tests", "TestContextTar")
	context, err := archive.Tar(contextDirectory, compression)

	if err != nil {
		t.Fatalf("failed to build context tar: %v", err)
	}
	buildCmd := exec.Command(dockerBinary, "build", "-t", "contexttar", "-")
	buildCmd.Stdin = context

	out, exitCode, err := runCommandWithOutput(buildCmd)
	if err != nil || exitCode != 0 {
		t.Fatalf("build failed to complete: %v %v", out, err)
	}
	deleteImages("contexttar")
	logDone(fmt.Sprintf("build - build an image with a context tar, compression: %v", compression))
}

func postBuild(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if version < 1.3 {
		return fmt.Errorf("Multipart upload for build is no longer supported. Please upgrade your docker client.")
	}
	remoteURL := r.FormValue("remote")
	repoName := r.FormValue("t")
	rawSuppressOutput := r.FormValue("q")
	rawNoCache := r.FormValue("nocache")
	rawRm := r.FormValue("rm")
	repoName, tag := utils.ParseRepositoryTag(repoName)

	var context io.Reader

	if remoteURL == "" {
		context = r.Body
	} else if utils.IsGIT(remoteURL) {
		if !strings.HasPrefix(remoteURL, "git://") {
			remoteURL = "https://" + remoteURL
		}
		root, err := ioutil.TempDir("", "docker-build-git")
		if err != nil {
			return err
		}
		defer os.RemoveAll(root)

		if output, err := exec.Command("git", "clone", remoteURL, root).CombinedOutput(); err != nil {
			return fmt.Errorf("Error trying to use git: %s (%s)", err, output)
		}

		c, err := archive.Tar(root, archive.Bzip2)
		if err != nil {
			return err
		}
		context = c
	} else if utils.IsURL(remoteURL) {
		f, err := utils.Download(remoteURL, ioutil.Discard)
		if err != nil {
			return err
		}
		defer f.Body.Close()
		dockerFile, err := ioutil.ReadAll(f.Body)
		if err != nil {
			return err
		}
		c, err := MkBuildContext(string(dockerFile), nil)
		if err != nil {
			return err
		}
		context = c
	}

	suppressOutput, err := getBoolParam(rawSuppressOutput)
	if err != nil {
		return err
	}
	noCache, err := getBoolParam(rawNoCache)
	if err != nil {
		return err
	}
	rm, err := getBoolParam(rawRm)
	if err != nil {
		return err
	}

	b := NewBuildFile(srv, utils.NewWriteFlusher(w), !suppressOutput, !noCache, rm)
	id, err := b.Build(context)
	if err != nil {
		return fmt.Errorf("Error build: %s", err)
	}
	if repoName != "" {
		srv.runtime.repositories.Set(repoName, tag, id, false)
	}
	return nil
}

func (container *Container) Export() (archive.Archive, error) {
	if err := container.EnsureMounted(); err != nil {
		return nil, err
	}
	return archive.Tar(container.RootfsPath(), archive.Uncompressed)
}

func (container *Container) ExportRw() (archive.Archive, error) {
	return archive.Tar(container.rwPath(), archive.Uncompressed)
}

func (b *buildFile) CmdAdd(args string) error {
	if b.context == nil {
		return fmt.Errorf("No context given. Impossible to use ADD")
	}
	tmp := strings.SplitN(args, " ", 2)
	if len(tmp) != 2 {
		return fmt.Errorf("Invalid ADD format")
	}

	orig, err := b.ReplaceEnvMatches(strings.Trim(tmp[0], " \t"))
	if err != nil {
		return err
	}

	dest, err := b.ReplaceEnvMatches(strings.Trim(tmp[1], " \t"))
	if err != nil {
		return err
	}

	cmd := b.config.Cmd
	b.config.Cmd = []string{"/bin/sh", "-c", fmt.Sprintf("#(nop) ADD %s in %s", orig, dest)}
	b.config.Image = b.image

	var (
		origPath   = orig
		destPath   = dest
		remoteHash string
		isRemote   bool
	)

	if utils.IsURL(orig) {
		// Initiate the download
		isRemote = true
		resp, err := utils.Download(orig)
		if err != nil {
			return err
		}

		// Create a tmp dir
		tmpDirName, err := ioutil.TempDir(b.contextPath, "docker-remote")
		if err != nil {
			return err
		}

		// Create a tmp file within our tmp dir
		tmpFileName := path.Join(tmpDirName, "tmp")
		tmpFile, err := os.OpenFile(tmpFileName, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600)
		if err != nil {
			return err
		}
		defer os.RemoveAll(tmpDirName)

		// Download and dump result to tmp file
		if _, err := io.Copy(tmpFile, resp.Body); err != nil {
			tmpFile.Close()
			return err
		}
		tmpFile.Close()

		origPath = path.Join(filepath.Base(tmpDirName), filepath.Base(tmpFileName))

		// Process the checksum
		r, err := archive.Tar(tmpFileName, archive.Uncompressed)
		if err != nil {
			return err
		}
		tarSum := utils.TarSum{Reader: r, DisableCompression: true}
		remoteHash = tarSum.Sum(nil)
		r.Close()

		// If the destination is a directory, figure out the filename.
		if strings.HasSuffix(dest, "/") {
			u, err := url.Parse(orig)
			if err != nil {
				return err
			}
			path := u.Path
			if strings.HasSuffix(path, "/") {
				path = path[:len(path)-1]
			}
			parts := strings.Split(path, "/")
			filename := parts[len(parts)-1]
			if filename == "" {
				return fmt.Errorf("cannot determine filename from url: %s", u)
			}
			destPath = dest + filename
		}
	}

	if err := b.checkPathForAddition(origPath); err != nil {
		return err
	}

	// Hash path and check the cache
	if b.utilizeCache {
		var (
			hash string
			sums = b.context.GetSums()
		)

//.........這裏部分代碼省略.........

func postBuild(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if version < 1.3 {
		return fmt.Errorf("Multipart upload for build is no longer supported. Please upgrade your docker client.")
	}
	var (
		remoteURL         = r.FormValue("remote")
		repoName          = r.FormValue("t")
		rawSuppressOutput = r.FormValue("q")
		rawNoCache        = r.FormValue("nocache")
		rawRm             = r.FormValue("rm")
		authEncoded       = r.Header.Get("X-Registry-Auth")
		authConfig        = &auth.AuthConfig{}
		configFileEncoded = r.Header.Get("X-Registry-Config")
		configFile        = &auth.ConfigFile{}
		tag               string
	)
	repoName, tag = utils.ParseRepositoryTag(repoName)

	// This block can be removed when API versions prior to 1.9 are deprecated.
	// Both headers will be parsed and sent along to the daemon, but if a non-empty
	// ConfigFile is present, any value provided as an AuthConfig directly will
	// be overridden. See BuildFile::CmdFrom for details.
	if version < 1.9 && authEncoded != "" {
		authJson := base64.NewDecoder(base64.URLEncoding, strings.NewReader(authEncoded))
		if err := json.NewDecoder(authJson).Decode(authConfig); err != nil {
			// for a pull it is not an error if no auth was given
			// to increase compatibility with the existing api it is defaulting to be empty
			authConfig = &auth.AuthConfig{}
		}
	}

	if configFileEncoded != "" {
		configFileJson := base64.NewDecoder(base64.URLEncoding, strings.NewReader(configFileEncoded))
		if err := json.NewDecoder(configFileJson).Decode(configFile); err != nil {
			// for a pull it is not an error if no auth was given
			// to increase compatibility with the existing api it is defaulting to be empty
			configFile = &auth.ConfigFile{}
		}
	}

	var context io.Reader

	if remoteURL == "" {
		context = r.Body
	} else if utils.IsGIT(remoteURL) {
		if !strings.HasPrefix(remoteURL, "git://") {
			remoteURL = "https://" + remoteURL
		}
		root, err := ioutil.TempDir("", "docker-build-git")
		if err != nil {
			return err
		}
		defer os.RemoveAll(root)

		if output, err := exec.Command("git", "clone", remoteURL, root).CombinedOutput(); err != nil {
			return fmt.Errorf("Error trying to use git: %s (%s)", err, output)
		}

		c, err := archive.Tar(root, archive.Uncompressed)
		if err != nil {
			return err
		}
		context = c
	} else if utils.IsURL(remoteURL) {
		f, err := utils.Download(remoteURL)
		if err != nil {
			return err
		}
		defer f.Body.Close()
		dockerFile, err := ioutil.ReadAll(f.Body)
		if err != nil {
			return err
		}
		c, err := MkBuildContext(string(dockerFile), nil)
		if err != nil {
			return err
		}
		context = c
	}

	suppressOutput, err := getBoolParam(rawSuppressOutput)
	if err != nil {
		return err
	}
	noCache, err := getBoolParam(rawNoCache)
	if err != nil {
		return err
	}
	rm, err := getBoolParam(rawRm)
	if err != nil {
		return err
	}

	if version >= 1.8 {
		w.Header().Set("Content-Type", "application/json")
	}
	sf := utils.NewStreamFormatter(version >= 1.8)
	b := NewBuildFile(srv,
		&StdoutFormater{
			Writer:          utils.NewWriteFlusher(w),
//.........這裏部分代碼省略.........

// ImageExport exports all images with the given tag. All versions
// containing the same tag are exported. The resulting output is an
// uncompressed tar ball.
// name is the set of tags to export.
// out is the writer where the images are written to.
func (srv *Server) ImageExport(name string, out io.Writer) error {
	// get image json
	tempdir, err := ioutil.TempDir("", "docker-export-")
	if err != nil {
		return err
	}
	defer os.RemoveAll(tempdir)

	utils.Debugf("Serializing %s", name)

	rootRepo := srv.runtime.repositories.Repositories[name]
	for _, rootImage := range rootRepo {
		image, _ := srv.ImageInspect(rootImage)
		for i := image; i != nil; {
			// temporary directory
			tmpImageDir := path.Join(tempdir, i.ID)
			if err := os.Mkdir(tmpImageDir, os.ModeDir); err != nil {
				return err
			}
			defer os.RemoveAll(tmpImageDir)

			var version = "1.0"
			var versionBuf = []byte(version)

			if err := ioutil.WriteFile(path.Join(tmpImageDir, "VERSION"), versionBuf, os.ModeAppend); err != nil {
				return err
			}

			// serialize json
			b, err := json.Marshal(i)
			if err != nil {
				return err
			}
			if err := ioutil.WriteFile(path.Join(tmpImageDir, "json"), b, os.ModeAppend); err != nil {
				return err
			}

			// serialize filesystem
			fs, err := archive.Tar(path.Join(srv.runtime.graph.Root, i.ID, "layer"), archive.Uncompressed)
			if err != nil {
				return err
			}

			fsTar, err := os.Create(path.Join(tmpImageDir, "layer.tar"))
			if err != nil {
				return err
			}
			if _, err = io.Copy(fsTar, fs); err != nil {
				return err
			}
			fsTar.Close()

			// find parent
			if i.Parent != "" {
				i, err = srv.ImageInspect(i.Parent)
				if err != nil {
					return err
				}
			} else {
				i = nil
			}
		}
	}

	// write repositories
	rootRepoMap := map[string]Repository{}
	rootRepoMap[name] = rootRepo
	rootRepoJson, _ := json.Marshal(rootRepoMap)

	if err := ioutil.WriteFile(path.Join(tempdir, "repositories"), rootRepoJson, os.ModeAppend); err != nil {
		return err
	}

	fs, err := archive.Tar(tempdir, archive.Uncompressed)
	if err != nil {
		return err
	}

	if _, err := io.Copy(out, fs); err != nil {
		return err
	}
	return nil
}