Golang rcli.DockerConn類代碼示例

func (srv *Server) CmdAttach(stdin io.ReadCloser, stdout rcli.DockerConn, args ...string) error {
	cmd := rcli.Subcmd(stdout, "attach", "CONTAINER", "Attach to a running container")
	if err := cmd.Parse(args); err != nil {
		return nil
	}
	if cmd.NArg() != 1 {
		cmd.Usage()
		return nil
	}
	name := cmd.Arg(0)
	container := srv.runtime.Get(name)
	if container == nil {
		return fmt.Errorf("No such container: %s", name)
	}

	if container.State.Ghost {
		return fmt.Errorf("Impossible to attach to a ghost container")
	}

	if container.Config.Tty {
		stdout.SetOptionRawTerminal()
	}
	// Flush the options to make sure the client sets the raw mode
	stdout.Flush()
	return <-container.Attach(stdin, nil, stdout, stdout)
}

func (srv *Server) CmdBuild(stdin io.ReadCloser, stdout rcli.DockerConn, args ...string) error {
	stdout.Flush()
	cmd := rcli.Subcmd(stdout, "build", "-", "Build a container from Dockerfile via stdin")
	if err := cmd.Parse(args); err != nil {
		return nil
	}
	img, err := NewBuilder(srv.runtime).Build(stdin, stdout)
	if err != nil {
		return err
	}
	fmt.Fprintf(stdout, "%s\n", img.ShortId())
	return nil
}

func (srv *Server) CmdImport(stdin io.ReadCloser, stdout rcli.DockerConn, args ...string) error {
	stdout.Flush()
	cmd := rcli.Subcmd(stdout, "import", "URL|- [REPOSITORY [TAG]]", "Create a new filesystem image from the contents of a tarball")
	var archive io.Reader
	var resp *http.Response

	if err := cmd.Parse(args); err != nil {
		return nil
	}
	if cmd.NArg() < 1 {
		cmd.Usage()
		return nil
	}
	src := cmd.Arg(0)
	if src == "-" {
		archive = stdin
	} else {
		u, err := url.Parse(src)
		if err != nil {
			return err
		}
		if u.Scheme == "" {
			u.Scheme = "http"
			u.Host = src
			u.Path = ""
		}
		fmt.Fprintln(stdout, "Downloading from", u)
		// Download with curl (pretty progress bar)
		// If curl is not available, fallback to http.Get()
		resp, err = Download(u.String(), stdout)
		if err != nil {
			return err
		}
		archive = ProgressReader(resp.Body, int(resp.ContentLength), stdout)
	}
	img, err := srv.runtime.graph.Create(archive, nil, "Imported from "+src, "")
	if err != nil {
		return err
	}
	// Optionally register the image at REPO/TAG
	if repository := cmd.Arg(1); repository != "" {
		tag := cmd.Arg(2) // Repository will handle an empty tag properly
		if err := srv.runtime.repositories.Set(repository, tag, img.Id, true); err != nil {
			return err
		}
	}
	fmt.Fprintln(stdout, img.ShortId())
	return nil
}

func (srv *Server) CmdInsert(stdin io.ReadCloser, stdout rcli.DockerConn, args ...string) error {
	stdout.Flush()
	cmd := rcli.Subcmd(stdout, "insert", "IMAGE URL PATH", "Insert a file from URL in the IMAGE at PATH")
	if err := cmd.Parse(args); err != nil {
		return nil
	}
	if cmd.NArg() != 3 {
		cmd.Usage()
		return nil
	}
	imageId := cmd.Arg(0)
	url := cmd.Arg(1)
	path := cmd.Arg(2)

	img, err := srv.runtime.repositories.LookupImage(imageId)
	if err != nil {
		return err
	}
	file, err := Download(url, stdout)
	if err != nil {
		return err
	}
	defer file.Body.Close()

	config, err := ParseRun([]string{img.Id, "echo", "insert", url, path}, nil, 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(ProgressReader(file.Body, int(file.ContentLength), stdout, "Downloading %v/%v (%v)"), 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
	}
	fmt.Fprintf(stdout, "%s\n", img.Id)
	return nil
}

func (srv *Server) CmdRun(stdin io.ReadCloser, stdout rcli.DockerConn, args ...string) error {
	config, err := ParseRun(args, stdout)
	if err != nil {
		return err
	}
	if config.Image == "" {
		fmt.Fprintln(stdout, "Error: Image not specified")
		return fmt.Errorf("Image not specified")
	}
	if len(config.Cmd) == 0 {
		fmt.Fprintln(stdout, "Error: Command not specified")
		return fmt.Errorf("Command not specified")
	}

	if config.Tty {
		stdout.SetOptionRawTerminal()
	}
	// Flush the options to make sure the client sets the raw mode
	// or tell the client there is no options
	stdout.Flush()

	// Create new container
	container, err := srv.runtime.Create(config)
	if err != nil {
		// If container not found, try to pull it
		if srv.runtime.graph.IsNotExist(err) {
			fmt.Fprintf(stdout, "Image %s not found, trying to pull it from registry.\r\n", config.Image)
			if err = srv.CmdPull(stdin, stdout, config.Image); err != nil {
				return err
			}
			if container, err = srv.runtime.Create(config); err != nil {
				return err
			}
		} else {
			return err
		}
	}
	var (
		cStdin           io.ReadCloser
		cStdout, cStderr io.Writer
	)
	if config.AttachStdin {
		r, w := io.Pipe()
		go func() {
			defer w.Close()
			defer Debugf("Closing buffered stdin pipe")
			io.Copy(w, stdin)
		}()
		cStdin = r
	}
	if config.AttachStdout {
		cStdout = stdout
	}
	if config.AttachStderr {
		cStderr = stdout // FIXME: rcli can't differentiate stdout from stderr
	}

	attachErr := container.Attach(cStdin, stdin, cStdout, cStderr)
	Debugf("Starting\n")
	if err := container.Start(); err != nil {
		return err
	}
	if cStdout == nil && cStderr == nil {
		fmt.Fprintln(stdout, container.ShortId())
	}
	Debugf("Waiting for attach to return\n")
	<-attachErr
	container.Wait()
	// Expecting I/O pipe error, discarding
	return nil
}

// 'docker login': login / register a user to registry service.
func (srv *Server) CmdLogin(stdin io.ReadCloser, stdout rcli.DockerConn, args ...string) error {
	// Read a line on raw terminal with support for simple backspace
	// sequences and echo.
	//
	// This function is necessary because the login command must be done in a
	// raw terminal for two reasons:
	// - we have to read a password (without echoing it);
	// - the rcli "protocol" only supports cannonical and raw modes and you
	//   can't tune it once the command as been started.
	var readStringOnRawTerminal = func(stdin io.Reader, stdout io.Writer, echo bool) string {
		char := make([]byte, 1)
		buffer := make([]byte, 64)
		var i = 0
		for i < len(buffer) {
			n, err := stdin.Read(char)
			if n > 0 {
				if char[0] == '\r' || char[0] == '\n' {
					stdout.Write([]byte{'\r', '\n'})
					break
				} else if char[0] == 127 || char[0] == '\b' {
					if i > 0 {
						if echo {
							stdout.Write([]byte{'\b', ' ', '\b'})
						}
						i--
					}
				} else if !unicode.IsSpace(rune(char[0])) &&
					!unicode.IsControl(rune(char[0])) {
					if echo {
						stdout.Write(char)
					}
					buffer[i] = char[0]
					i++
				}
			}
			if err != nil {
				if err != io.EOF {
					fmt.Fprintf(stdout, "Read error: %v\r\n", err)
				}
				break
			}
		}
		return string(buffer[:i])
	}
	var readAndEchoString = func(stdin io.Reader, stdout io.Writer) string {
		return readStringOnRawTerminal(stdin, stdout, true)
	}
	var readString = func(stdin io.Reader, stdout io.Writer) string {
		return readStringOnRawTerminal(stdin, stdout, false)
	}

	stdout.SetOptionRawTerminal()

	cmd := rcli.Subcmd(stdout, "login", "", "Register or Login to the docker registry server")
	if err := cmd.Parse(args); err != nil {
		return nil
	}

	var username string
	var password string
	var email string

	fmt.Fprint(stdout, "Username (", srv.runtime.authConfig.Username, "): ")
	username = readAndEchoString(stdin, stdout)
	if username == "" {
		username = srv.runtime.authConfig.Username
	}
	if username != srv.runtime.authConfig.Username {
		fmt.Fprint(stdout, "Password: ")
		password = readString(stdin, stdout)

		if password == "" {
			return fmt.Errorf("Error : Password Required")
		}

		fmt.Fprint(stdout, "Email (", srv.runtime.authConfig.Email, "): ")
		email = readAndEchoString(stdin, stdout)
		if email == "" {
			email = srv.runtime.authConfig.Email
		}
	} else {
		password = srv.runtime.authConfig.Password
		email = srv.runtime.authConfig.Email
	}
	newAuthConfig := auth.NewAuthConfig(username, password, email, srv.runtime.root)
	status, err := auth.Login(newAuthConfig)
	if err != nil {
		fmt.Fprintf(stdout, "Error: %s\r\n", err)
	} else {
		srv.runtime.authConfig = newAuthConfig
	}
	if status != "" {
		fmt.Fprint(stdout, status)
	}
	return nil
}