func (lb *FileBackend) BuildACIV22(layerIDs []string, dockerURL *types.ParsedDockerURL, outputDir string, tmpBaseDir string, compression common.Compression) ([]string, []*schema.ImageManifest, error) {
if len(layerIDs) < 2 {
return nil, nil, fmt.Errorf("insufficient layers for oci image")
}
var aciLayerPaths []string
var aciManifests []*schema.ImageManifest
var curPwl []string
imageID := layerIDs[0]
layerIDs = layerIDs[1:]
j, err := getJsonV22(lb.file, imageID)
if err != nil {
return nil, nil, fmt.Errorf("error getting layer from file: %v", err)
}
imageConfig := typesV2.ImageConfig{}
if err := json.Unmarshal(j, &imageConfig); err != nil {
return nil, nil, fmt.Errorf("error unmarshaling image data: %v", err)
}
tmpDir, err := ioutil.TempDir(tmpBaseDir, "docker2aci-")
if err != nil {
return nil, nil, fmt.Errorf("error creating dir: %v", err)
}
defer os.RemoveAll(tmpDir)
for i := len(layerIDs) - 1; i >= 0; i-- {
parts := strings.Split(layerIDs[i], ":")
tmpLayerPath := path.Join(tmpDir, parts[1])
tmpLayerPath += ".tar"
layerTarPath := path.Join(append([]string{"blobs"}, parts...)...)
layerFile, err := extractEmbeddedLayer(lb.file, layerTarPath, tmpLayerPath)
if err != nil {
return nil, nil, fmt.Errorf("error getting layer from file: %v", err)
}
defer layerFile.Close()
log.Debug("Generating layer ACI...")
var aciPath string
var manifest *schema.ImageManifest
if i != 0 {
aciPath, manifest, err = internal.GenerateACI22LowerLayer(dockerURL, parts[1], outputDir, layerFile, curPwl, compression)
} else {
aciPath, manifest, err = internal.GenerateACI22TopLayer(dockerURL, &imageConfig, parts[1], outputDir, layerFile, curPwl, compression, aciManifests)
}
if err != nil {
return nil, nil, fmt.Errorf("error generating ACI: %v", err)
}
aciLayerPaths = append(aciLayerPaths, aciPath)
aciManifests = append(aciManifests, manifest)
curPwl = manifest.PathWhitelist
}
return aciLayerPaths, aciManifests, nil
}
func (rb *RepositoryBackend) buildACIV22(layerIDs []string, dockerURL *common.ParsedDockerURL, outputDir string, tmpBaseDir string, compression common.Compression) ([]string, []*schema.ImageManifest, error) {
layerFiles := make([]*os.File, len(layerIDs))
tmpParentDir, err := ioutil.TempDir(tmpBaseDir, "docker2aci-")
if err != nil {
return nil, nil, err
}
defer os.RemoveAll(tmpParentDir)
copier := progressutil.NewCopyProgressPrinter()
resultChan := make(chan layer, len(layerIDs))
for i, layerID := range layerIDs {
if err := common.ValidateLayerId(layerID); err != nil {
return nil, nil, err
}
// https://github.com/golang/go/wiki/CommonMistakes
i := i // golang--
layerID := layerID
go func() {
tmpDir, err := ioutil.TempDir(tmpParentDir, "")
if err != nil {
resultChan <- layer{
index: i,
err: fmt.Errorf("error creating dir: %v", err),
}
return
}
layerFile, closer, err := rb.getLayerV2(layerID, dockerURL, tmpDir, copier)
if err != nil {
resultChan <- layer{
index: i,
err: fmt.Errorf("error getting the remote layer: %v", err),
}
return
}
resultChan <- layer{
index: i,
file: layerFile,
closer: closer,
err: nil,
}
}()
}
var errs []error
for i := 0; i < len(layerIDs); i++ {
res := <-resultChan
if res.closer != nil {
defer res.closer.Close()
}
if res.file != nil {
defer res.file.Close()
}
if res.err != nil {
errs = append(errs, res.err)
}
layerFiles[res.index] = res.file
}
if len(errs) > 0 {
return nil, nil, errs[0]
}
err = copier.PrintAndWait(os.Stderr, 500*time.Millisecond, nil)
if err != nil {
return nil, nil, err
}
for _, layerFile := range layerFiles {
err := layerFile.Sync()
if err != nil {
return nil, nil, err
}
}
var aciLayerPaths []string
var aciManifests []*schema.ImageManifest
var curPwl []string
var i int
for i = 0; i < len(layerIDs)-1; i++ {
rb.debug.Println("Generating layer ACI...")
aciPath, aciManifest, err := internal.GenerateACI22LowerLayer(dockerURL, layerIDs[i], outputDir, layerFiles[i], curPwl, compression)
if err != nil {
return nil, nil, fmt.Errorf("error generating ACI: %v", err)
}
aciLayerPaths = append(aciLayerPaths, aciPath)
aciManifests = append(aciManifests, aciManifest)
curPwl = aciManifest.PathWhitelist
}
rb.debug.Println("Generating layer ACI...")
aciPath, aciManifest, err := internal.GenerateACI22TopLayer(dockerURL, rb.imageConfigs[*dockerURL], layerIDs[i], outputDir, layerFiles[i], curPwl, compression, aciManifests, rb.debug)
if err != nil {
return nil, nil, fmt.Errorf("error generating ACI: %v", err)
}
aciLayerPaths = append(aciLayerPaths, aciPath)
aciManifests = append(aciManifests, aciManifest)
return aciLayerPaths, aciManifests, nil
}