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 = &tarsum.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 (s *TagStore) CmdLoad(job *engine.Job) engine.Status {
tmpImageDir, err := ioutil.TempDir("", "docker-import-")
if err != nil {
return job.Error(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 job.Error(err)
}
if _, err := io.Copy(tarFile, job.Stdin); err != nil {
return job.Error(err)
}
tarFile.Close()
repoFile, err := os.Open(repoTarFile)
if err != nil {
return job.Error(err)
}
if err := os.Mkdir(repoDir, os.ModeDir); err != nil {
return job.Error(err)
}
images, err := s.graph.Map()
if err != nil {
return job.Error(err)
}
excludes := make([]string, len(images))
i := 0
for k := range images {
excludes[i] = k
i++
}
if err := archive.Untar(repoFile, repoDir, &archive.TarOptions{Excludes: excludes}); err != nil {
return job.Error(err)
}
dirs, err := ioutil.ReadDir(repoDir)
if err != nil {
return job.Error(err)
}
for _, d := range dirs {
if d.IsDir() {
if err := s.recursiveLoad(job.Eng, d.Name(), tmpImageDir); err != nil {
return job.Error(err)
}
}
}
repositoriesJson, err := ioutil.ReadFile(path.Join(tmpImageDir, "repo", "repositories"))
if err == nil {
repositories := map[string]Repository{}
if err := json.Unmarshal(repositoriesJson, &repositories); err != nil {
return job.Error(err)
}
for imageName, tagMap := range repositories {
for tag, address := range tagMap {
if err := s.Set(imageName, tag, address, true); err != nil {
return job.Error(err)
}
}
}
} else if !os.IsNotExist(err) {
return job.Error(err)
}
return engine.StatusOK
}
func (a *Driver) ApplyDiff(id string, diff archive.ArchiveReader) error {
return archive.Untar(diff, path.Join(a.rootPath(), "diff", id), nil)
}