Golang log.Infof函數代碼示例

// teardown is a helper function that we can use to
// stop and remove the build container, its supporting image,
// and the supporting service containers.
func (b *Builder) teardown() error {

	// stop and destroy the container
	if b.container != nil {

		// debugging
		log.Info("removing build container")

		// stop the container, ignore error message
		b.dockerClient.Containers.Stop(b.container.ID, 15)

		// remove the container, ignore error message
		if err := b.dockerClient.Containers.Remove(b.container.ID); err != nil {
			log.Errf("failed to delete build container %s", b.container.ID)
		}
	}

	// stop and destroy the container services
	for i, container := range b.services {
		// debugging
		log.Infof("removing service container %s", b.Build.Services[i])

		// stop the service container, ignore the error
		b.dockerClient.Containers.Stop(container.ID, 15)

		// remove the service container, ignore the error
		if err := b.dockerClient.Containers.Remove(container.ID); err != nil {
			log.Errf("failed to delete service container %s", container.ID)
		}
	}

	// destroy the underlying image
	if b.image != nil {
		// debugging
		log.Info("removing build image")

		if _, err := b.dockerClient.Images.Remove(b.image.ID); err != nil {
			log.Errf("failed to completely delete build image %s. %s", b.image.ID, err.Error())
		}
	}

	return nil
}

func (b *Builder) run() error {
	// create and run the container
	conf := docker.Config{
		Image:        b.image.ID,
		AttachStdin:  false,
		AttachStdout: true,
		AttachStderr: true,
	}

	// configure if Docker should run in privileged mode
	host := docker.HostConfig{
		Privileged: (b.Privileged && len(b.Repo.PR) == 0),
	}

	// debugging
	log.Noticef("starting build %s", b.Build.Name)

	// link service containers
	for i, service := range b.services {
		// convert name of the image to a slug
		_, name, _ := parseImageName(b.Build.Services[i])

		// link the service container to our
		// build container.
		host.Links = append(host.Links, service.Name[1:]+":"+name)
	}

	// where are temp files going to go?
	tmpPath := "/tmp/drone"
	if len(os.Getenv("DRONE_TMP")) > 0 {
		tmpPath = os.Getenv("DRONE_TMP")
	}

	log.Infof("temp directory is %s", tmpPath)

	if err := os.MkdirAll(tmpPath, 0777); err != nil {
		return fmt.Errorf("Failed to create temp directory at %s: %s", tmpPath, err)
	}

	// link cached volumes
	conf.Volumes = make(map[string]struct{})
	for _, volume := range b.Build.Cache {
		name := filepath.Clean(b.Repo.Name)
		branch := filepath.Clean(b.Repo.Branch)
		volume := filepath.Clean(volume)

		// with Docker, volumes must be an absolute path. If an absolute
		// path is not provided, then assume it is for the repository
		// working directory.
		if strings.HasPrefix(volume, "/") == false {
			volume = filepath.Join(b.Repo.Dir, volume)
		}

		// local cache path on the host machine
		// this path is going to be really long
		hostpath := filepath.Join(tmpPath, name, branch, volume)

		// check if the volume is created
		if _, err := os.Stat(hostpath); err != nil {
			// if does not exist then create
			os.MkdirAll(hostpath, 0777)
		}

		host.Binds = append(host.Binds, hostpath+":"+volume)
		conf.Volumes[volume] = struct{}{}

		// debugging
		log.Infof("mounting volume %s:%s", hostpath, volume)
	}

	// create the container from the image
	run, err := b.dockerClient.Containers.Create(&conf)
	if err != nil {
		return err
	}

	// cache instance of docker.Run
	b.container = run

	// attach to the container
	go func() {
		b.dockerClient.Containers.Attach(run.ID, &writer{b.Stdout})
	}()

	// start the container
	if err := b.dockerClient.Containers.Start(run.ID, &host); err != nil {
		b.BuildState.ExitCode = 1
		b.BuildState.Finished = time.Now().UTC().Unix()
		return err
	}

	// wait for the container to stop
	wait, err := b.dockerClient.Containers.Wait(run.ID)
	if err != nil {
		b.BuildState.ExitCode = 1
		b.BuildState.Finished = time.Now().UTC().Unix()
		return err
	}

	// set completion time
//.........這裏部分代碼省略.........

func (b *Builder) setup() error {

	// temp directory to store all files required
	// to generate the Docker image.
	dir, err := ioutil.TempDir("", "drone-")
	if err != nil {
		return err
	}

	// clean up after our mess.
	defer os.RemoveAll(dir)

	// make sure the image isn't empty. this would be bad
	if len(b.Build.Image) == 0 {
		log.Err("Fatal Error, No Docker Image specified")
		return fmt.Errorf("Error: missing Docker image")
	}

	// if we're using an alias for the build name we
	// should substitute it now
	if alias, ok := builders[b.Build.Image]; ok {
		b.Build.Image = alias.Tag
	}

	// if this is a local repository we should symlink
	// to the source code in our temp directory
	if b.Repo.IsLocal() {
		// this is where we used to use symlinks. We should
		// talk to the docker team about this, since copying
		// the entire repository is slow :(
		//
		// see https://github.com/dotcloud/docker/pull/3567

		//src := filepath.Join(dir, "src")
		//err = os.Symlink(b.Repo.Path, src)
		//if err != nil {
		//	return err
		//}

		src := filepath.Join(dir, "src")
		cmd := exec.Command("cp", "-a", b.Repo.Path, src)
		if err := cmd.Run(); err != nil {
			return err
		}
	}

	// start all services required for the build
	// that will get linked to the container.
	for _, service := range b.Build.Services {

		// Parse the name of the Docker image
		// And then construct a fully qualified image name
		owner, name, tag := parseImageName(service)
		cname := fmt.Sprintf("%s/%s:%s", owner, name, tag)

		// Get the image info
		img, err := b.dockerClient.Images.Inspect(cname)
		if err != nil {
			// Get the image if it doesn't exist
			if err := b.dockerClient.Images.Pull(cname); err != nil {
				return fmt.Errorf("Error: Unable to pull image %s", cname)
			}

			img, err = b.dockerClient.Images.Inspect(cname)
			if err != nil {
				return fmt.Errorf("Error: Invalid or unknown image %s", cname)
			}
		}

		// debugging
		log.Infof("starting service container %s", cname)

		// Run the contianer
		run, err := b.dockerClient.Containers.RunDaemonPorts(cname, img.Config.ExposedPorts)
		if err != nil {
			return err
		}

		// Get the container info
		info, err := b.dockerClient.Containers.Inspect(run.ID)
		if err != nil {
			// on error kill the container since it hasn't yet been
			// added to the array and would therefore not get
			// removed in the defer statement.
			b.dockerClient.Containers.Stop(run.ID, 10)
			b.dockerClient.Containers.Remove(run.ID)
			return err
		}

		// Add the running service to the list
		b.services = append(b.services, info)
	}

	if err := b.writeIdentifyFile(dir); err != nil {
		return err
	}

	if err := b.writeBuildScript(dir); err != nil {
		return err
	}
//.........這裏部分代碼省略.........

func (b *Builder) run() error {
	// create and run the container
	conf := docker.Config{
		Image:        b.image.ID,
		AttachStdin:  false,
		AttachStdout: true,
		AttachStderr: true,
	}
	host := docker.HostConfig{
		Privileged: false,
	}

	// debugging
	log.Noticef("starting build %s", b.Build.Name)

	// link service containers
	for i, service := range b.services {
		image, ok := services[b.Build.Services[i]]
		if !ok {
			continue // THIS SHOULD NEVER HAPPEN
		}
		// link the service container to our
		// build container.
		host.Links = append(host.Links, service.Name[1:]+":"+image.Name)
	}

	// link cached volumes
	conf.Volumes = make(map[string]struct{})
	for _, volume := range b.Build.Cache {
		name := filepath.Clean(b.Repo.Name)
		branch := filepath.Clean(b.Repo.Branch)
		volume := filepath.Clean(volume)

		// with Docker, volumes must be an absolute path. If an absolute
		// path is not provided, then assume it is for the repository
		// working directory.
		if strings.HasPrefix(volume, "/") == false {
			volume = filepath.Join(b.Repo.Dir, volume)
		}

		// local cache path on the host machine
		// this path is going to be really long
		hostpath := filepath.Join("/tmp/drone", name, branch, volume)

		// check if the volume is created
		if _, err := os.Stat(hostpath); err != nil {
			// if does not exist then create
			os.MkdirAll(hostpath, 0777)
		}

		host.Binds = append(host.Binds, hostpath+":"+volume)
		conf.Volumes[volume] = struct{}{}

		// debugging
		log.Infof("mounting volume %s:%s", hostpath, volume)
	}

	// create the container from the image
	run, err := b.dockerClient.Containers.Create(&conf)
	if err != nil {
		return err
	}

	// cache instance of docker.Run
	b.container = run

	// attach to the container
	go func() {
		b.dockerClient.Containers.Attach(run.ID, &writer{b.Stdout})
	}()

	// start the container
	if err := b.dockerClient.Containers.Start(run.ID, &host); err != nil {
		b.BuildState.ExitCode = 1
		b.BuildState.Finished = time.Now().UTC().Unix()
		return err
	}

	// wait for the container to stop
	wait, err := b.dockerClient.Containers.Wait(run.ID)
	if err != nil {
		b.BuildState.ExitCode = 1
		b.BuildState.Finished = time.Now().UTC().Unix()
		return err
	}

	// set completion time
	b.BuildState.Finished = time.Now().UTC().Unix()

	// get the exit code if possible
	b.BuildState.ExitCode = wait.StatusCode

	return nil
}