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
}
// 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
}
// 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
}
