Beispiel #1
0
func (b *Builder) processLabels() error {
	if len(b.options.Labels) == 0 {
		return nil
	}

	var labels []string
	for k, v := range b.options.Labels {
		labels = append(labels, fmt.Sprintf("%q='%s'", k, v))
	}
	// Sort the label to have a repeatable order
	sort.Strings(labels)

	line := "LABEL " + strings.Join(labels, " ")
	_, node, err := parser.ParseLine(line, &b.directive, false)
	if err != nil {
		return err
	}
	b.dockerfile.Children = append(b.dockerfile.Children, node)

	return nil
}
Beispiel #2
0
// build runs the Dockerfile builder from a context and a docker object that allows to make calls
// to Docker.
//
// This will (barring errors):
//
// * read the dockerfile from context
// * parse the dockerfile if not already parsed
// * walk the AST and execute it by dispatching to handlers. If Remove
//   or ForceRemove is set, additional cleanup around containers happens after
//   processing.
// * Tag image, if applicable.
// * Print a happy message and return the image ID.
//
func (b *Builder) build(stdout io.Writer, stderr io.Writer, out io.Writer) (string, error) {
	b.Stdout = stdout
	b.Stderr = stderr
	b.Output = out

	// If Dockerfile was not parsed yet, extract it from the Context
	if b.dockerfile == nil {
		if err := b.readDockerfile(); err != nil {
			return "", err
		}
	}

	repoAndTags, err := sanitizeRepoAndTags(b.options.Tags)
	if err != nil {
		return "", err
	}

	if len(b.options.Labels) > 0 {
		line := "LABEL "
		for k, v := range b.options.Labels {
			line += fmt.Sprintf("%q='%s' ", k, v)
		}
		_, node, err := parser.ParseLine(line, &b.directive, false)
		if err != nil {
			return "", err
		}
		b.dockerfile.Children = append(b.dockerfile.Children, node)
	}

	var shortImgID string
	total := len(b.dockerfile.Children)
	for _, n := range b.dockerfile.Children {
		if err := b.checkDispatch(n, false); err != nil {
			return "", err
		}
	}

	for i, n := range b.dockerfile.Children {
		select {
		case <-b.clientCtx.Done():
			logrus.Debug("Builder: build cancelled!")
			fmt.Fprintf(b.Stdout, "Build cancelled")
			return "", fmt.Errorf("Build cancelled")
		default:
			// Not cancelled yet, keep going...
		}

		if err := b.dispatch(i, total, n); err != nil {
			if b.options.ForceRemove {
				b.clearTmp()
			}
			return "", err
		}

		shortImgID = stringid.TruncateID(b.image)
		fmt.Fprintf(b.Stdout, " ---> %s\n", shortImgID)
		if b.options.Remove {
			b.clearTmp()
		}
	}

	// check if there are any leftover build-args that were passed but not
	// consumed during build. Return a warning, if there are any.
	leftoverArgs := []string{}
	for arg := range b.options.BuildArgs {
		if !b.isBuildArgAllowed(arg) {
			leftoverArgs = append(leftoverArgs, arg)
		}
	}

	if len(leftoverArgs) > 0 {
		fmt.Fprintf(b.Stderr, "[Warning] One or more build-args %v were not consumed\n", leftoverArgs)
	}

	if b.image == "" {
		return "", fmt.Errorf("No image was generated. Is your Dockerfile empty?")
	}

	if b.options.Squash {
		var fromID string
		if b.from != nil {
			fromID = b.from.ImageID()
		}
		b.image, err = b.docker.SquashImage(b.image, fromID)
		if err != nil {
			return "", perrors.Wrap(err, "error squashing image")
		}
	}

	imageID := image.ID(b.image)
	for _, rt := range repoAndTags {
		if err := b.docker.TagImageWithReference(imageID, rt); err != nil {
			return "", err
		}
	}

	fmt.Fprintf(b.Stdout, "Successfully built %s\n", shortImgID)
	return b.image, nil
}
Beispiel #3
0
// build runs the Dockerfile builder from a context and a docker object that allows to make calls
// to Docker.
//
// This will (barring errors):
//
// * read the dockerfile from context
// * parse the dockerfile if not already parsed
// * walk the AST and execute it by dispatching to handlers. If Remove
//   or ForceRemove is set, additional cleanup around containers happens after
//   processing.
// * Tag image, if applicable.
// * Print a happy message and return the image ID.
//
func (b *Builder) build(config *types.ImageBuildOptions, context builder.Context, stdout io.Writer, stderr io.Writer, out io.Writer, clientGone <-chan bool) (string, error) {
	b.options = config
	b.context = context
	b.Stdout = stdout
	b.Stderr = stderr
	b.Output = out

	// If Dockerfile was not parsed yet, extract it from the Context
	if b.dockerfile == nil {
		if err := b.readDockerfile(); err != nil {
			return "", err
		}
	}

	finished := make(chan struct{})
	defer close(finished)
	go func() {
		select {
		case <-finished:
		case <-clientGone:
			b.cancelOnce.Do(func() {
				close(b.cancelled)
			})
		}

	}()

	repoAndTags, err := sanitizeRepoAndTags(config.Tags)
	if err != nil {
		return "", err
	}

	if len(b.options.Labels) > 0 {
		line := "LABEL "
		for k, v := range b.options.Labels {
			line += fmt.Sprintf("%q=%q ", k, v)
		}
		_, node, err := parser.ParseLine(line)
		if err != nil {
			return "", err
		}
		b.dockerfile.Children = append(b.dockerfile.Children, node)
	}

	var shortImgID string
	for i, n := range b.dockerfile.Children {
		select {
		case <-b.cancelled:
			logrus.Debug("Builder: build cancelled!")
			fmt.Fprintf(b.Stdout, "Build cancelled")
			return "", fmt.Errorf("Build cancelled")
		default:
			// Not cancelled yet, keep going...
		}
		if err := b.dispatch(i, n); err != nil {
			if b.options.ForceRemove {
				b.clearTmp()
			}
			return "", err
		}

		shortImgID = stringid.TruncateID(b.image)
		fmt.Fprintf(b.Stdout, " ---> %s\n", shortImgID)
		if b.options.Remove {
			b.clearTmp()
		}
	}

	// check if there are any leftover build-args that were passed but not
	// consumed during build. Return an error, if there are any.
	leftoverArgs := []string{}
	for arg := range b.options.BuildArgs {
		if !b.isBuildArgAllowed(arg) {
			leftoverArgs = append(leftoverArgs, arg)
		}
	}
	if len(leftoverArgs) > 0 {
		return "", fmt.Errorf("One or more build-args %v were not consumed, failing build.", leftoverArgs)
	}

	if b.image == "" {
		return "", fmt.Errorf("No image was generated. Is your Dockerfile empty?")
	}

	for _, rt := range repoAndTags {
		if err := b.docker.TagImage(rt, b.image); err != nil {
			return "", err
		}
	}

	fmt.Fprintf(b.Stdout, "Successfully built %s\n", shortImgID)
	return b.image, nil
}