func (b *buildFile) Build(context io.Reader) (string, error) {
// FIXME: @creack "name" is a terrible variable name
name, err := ioutil.TempDir("", "docker-build")
if err != nil {
return "", err
}
if err := archive.Untar(context, name, nil); err != nil {
return "", err
}
defer os.RemoveAll(name)
b.context = name
filename := path.Join(name, "Dockerfile")
if _, err := os.Stat(filename); os.IsNotExist(err) {
return "", fmt.Errorf("Can't build a directory with no Dockerfile")
}
fileBytes, err := ioutil.ReadFile(filename)
if err != nil {
return "", err
}
dockerfile := string(fileBytes)
dockerfile = lineContinuation.ReplaceAllString(dockerfile, "")
stepN := 0
for _, line := range strings.Split(dockerfile, "\n") {
line = strings.Trim(strings.Replace(line, "\t", " ", -1), " \t\r\n")
// Skip comments and empty line
if len(line) == 0 || line[0] == '#' {
continue
}
tmp := strings.SplitN(line, " ", 2)
if len(tmp) != 2 {
return "", fmt.Errorf("Invalid Dockerfile format")
}
instruction := strings.ToLower(strings.Trim(tmp[0], " "))
arguments := strings.Trim(tmp[1], " ")
method, exists := reflect.TypeOf(b).MethodByName("Cmd" + strings.ToUpper(instruction[:1]) + strings.ToLower(instruction[1:]))
if !exists {
fmt.Fprintf(b.errStream, "# Skipping unknown instruction %s\n", strings.ToUpper(instruction))
continue
}
stepN += 1
fmt.Fprintf(b.outStream, "Step %d : %s %s\n", stepN, strings.ToUpper(instruction), arguments)
ret := method.Func.Call([]reflect.Value{reflect.ValueOf(b), reflect.ValueOf(arguments)})[0].Interface()
if ret != nil {
return "", ret.(error)
}
fmt.Fprintf(b.outStream, " ---> %s\n", utils.TruncateID(b.image))
}
if b.image != "" {
fmt.Fprintf(b.outStream, "Successfully built %s\n", utils.TruncateID(b.image))
if b.rm {
b.clearTmp(b.tmpContainers)
}
return b.image, nil
}
return "", fmt.Errorf("No image was generated. This may be because the Dockerfile does not, like, do anything.\n")
}
func (b *buildFile) Build(context io.Reader) (string, error) {
tmpdirPath, err := ioutil.TempDir("", "docker-build")
if err != nil {
return "", err
}
decompressedStream, err := archive.DecompressStream(context)
if err != nil {
return "", err
}
b.context = &utils.TarSum{Reader: decompressedStream, DisableCompression: true}
if err := archive.Untar(b.context, tmpdirPath, nil); err != nil {
return "", err
}
defer os.RemoveAll(tmpdirPath)
b.contextPath = tmpdirPath
filename := path.Join(tmpdirPath, "Dockerfile")
if _, err := os.Stat(filename); os.IsNotExist(err) {
return "", fmt.Errorf("Can't build a directory with no Dockerfile")
}
fileBytes, err := ioutil.ReadFile(filename)
if err != nil {
return "", err
}
if len(fileBytes) == 0 {
return "", ErrDockerfileEmpty
}
var (
dockerfile = lineContinuation.ReplaceAllString(stripComments(fileBytes), "")
stepN = 0
)
for _, line := range strings.Split(dockerfile, "\n") {
line = strings.Trim(strings.Replace(line, "\t", " ", -1), " \t\r\n")
if len(line) == 0 {
continue
}
if err := b.BuildStep(fmt.Sprintf("%d", stepN), line); err != nil {
if b.forceRm {
b.clearTmp(b.tmpContainers)
}
return "", err
} else if b.rm {
b.clearTmp(b.tmpContainers)
}
stepN += 1
}
if b.image != "" {
fmt.Fprintf(b.outStream, "Successfully built %s\n", utils.TruncateID(b.image))
return b.image, nil
}
return "", fmt.Errorf("No image was generated. This may be because the Dockerfile does not, like, do anything.\n")
}
// Loads a set of images into the repository. This is the complementary of ImageExport.
// The input stream is an uncompressed tar ball containing images and metadata.
func (srv *Server) ImageLoad(in io.Reader) error {
tmpImageDir, err := ioutil.TempDir("", "docker-import-")
if err != nil {
return err
}
defer os.RemoveAll(tmpImageDir)
var (
repoTarFile = path.Join(tmpImageDir, "repo.tar")
repoDir = path.Join(tmpImageDir, "repo")
)
tarFile, err := os.Create(repoTarFile)
if err != nil {
return err
}
if _, err := io.Copy(tarFile, in); err != nil {
return err
}
tarFile.Close()
repoFile, err := os.Open(repoTarFile)
if err != nil {
return err
}
if err := os.Mkdir(repoDir, os.ModeDir); err != nil {
return err
}
if err := archive.Untar(repoFile, repoDir); err != nil {
return err
}
repositoriesJson, err := ioutil.ReadFile(path.Join(tmpImageDir, "repo", "repositories"))
if err != nil {
return err
}
repositories := map[string]Repository{}
if err := json.Unmarshal(repositoriesJson, &repositories); err != nil {
return err
}
for imageName, tagMap := range repositories {
for tag, address := range tagMap {
if err := srv.recursiveLoad(address, tmpImageDir); err != nil {
return err
}
if err := srv.runtime.repositories.Set(imageName, tag, address, true); err != nil {
return err
}
}
}
return nil
}
func StoreImage(img *Image, jsonData []byte, layerData archive.Archive, root string) error {
// Check that root doesn't already exist
if _, err := os.Stat(root); err == nil {
return fmt.Errorf("Image %s already exists", img.ID)
} else if !os.IsNotExist(err) {
return err
}
// Store the layer
layer := layerPath(root)
if err := os.MkdirAll(layer, 0755); err != nil {
return err
}
// If layerData is not nil, unpack it into the new layer
if layerData != nil {
start := time.Now()
utils.Debugf("Start untar layer")
if err := archive.Untar(layerData, layer); err != nil {
return err
}
utils.Debugf("Untar time: %vs", time.Now().Sub(start).Seconds())
}
// If raw json is provided, then use it
if jsonData != nil {
return ioutil.WriteFile(jsonPath(root), jsonData, 0600)
}
// Otherwise, unmarshal the image
jsonData, err := json.Marshal(img)
if err != nil {
return err
}
if err := ioutil.WriteFile(jsonPath(root), jsonData, 0600); err != nil {
return err
}
return StoreSize(img, root)
}
func (a *Driver) ApplyDiff(id string, diff archive.ArchiveReader) error {
return archive.Untar(diff, path.Join(a.rootPath(), "diff", id), nil)
}