// SquashLayers receives a list of ACI layer file names ordered from base image
// to application image and squashes them into one ACI
func SquashLayers(images []acirenderer.Image, aciRegistry acirenderer.ACIRegistry, parsedDockerURL types.ParsedDockerURL, outputDir string) (string, error) {
util.Debug("Squashing layers...")
util.Debug("Rendering ACI...")
renderedACI, err := acirenderer.GetRenderedACIFromList(images, aciRegistry)
if err != nil {
return "", fmt.Errorf("error rendering squashed image: %v", err)
}
manifests, err := getManifests(renderedACI, aciRegistry)
if err != nil {
return "", fmt.Errorf("error getting manifests: %v", err)
}
squashedFilename := getSquashedFilename(parsedDockerURL)
squashedImagePath := path.Join(outputDir, squashedFilename)
squashedImageFile, err := os.Create(squashedImagePath)
if err != nil {
return "", err
}
defer squashedImageFile.Close()
util.Debug("Writing squashed ACI...")
if err := writeSquashedImage(squashedImageFile, renderedACI, aciRegistry, manifests); err != nil {
return "", fmt.Errorf("error writing squashed image: %v", err)
}
util.Debug("Validating squashed ACI...")
if err := common.ValidateACI(squashedImagePath); err != nil {
return "", fmt.Errorf("error validating image: %v", err)
}
util.Debug("ACI squashed!")
return squashedImagePath, nil
}
// Given an already populated dependency list, it will extract, under the provided
// directory, the rendered ACI
func RenderACIFromList(imgs acirenderer.Images, dir string, ap acirenderer.ACIProvider, uidRange *user.UidRange) error {
renderedACI, err := acirenderer.GetRenderedACIFromList(imgs, ap)
if err != nil {
return err
}
return renderImage(renderedACI, dir, ap, uidRange)
}
// squashLayers receives a list of ACI layer file names ordered from base image
// to application image and squashes them into one ACI
func squashLayers(images []acirenderer.Image, aciRegistry acirenderer.ACIRegistry, parsedDockerURL types.ParsedDockerURL, outputDir string, compression common.Compression) (path string, err error) {
log.Debug("Squashing layers...")
log.Debug("Rendering ACI...")
renderedACI, err := acirenderer.GetRenderedACIFromList(images, aciRegistry)
if err != nil {
return "", fmt.Errorf("error rendering squashed image: %v", err)
}
manifests, err := getManifests(renderedACI, aciRegistry)
if err != nil {
return "", fmt.Errorf("error getting manifests: %v", err)
}
squashedFilename := getSquashedFilename(parsedDockerURL)
squashedImagePath := filepath.Join(outputDir, squashedFilename)
squashedTempFile, err := ioutil.TempFile(outputDir, "docker2aci-squashedFile-")
if err != nil {
return "", err
}
defer func() {
if err == nil {
err = squashedTempFile.Close()
} else {
// remove temp file on error
// we ignore its error to not mask the real error
os.Remove(squashedTempFile.Name())
}
}()
log.Debug("Writing squashed ACI...")
if err := writeSquashedImage(squashedTempFile, renderedACI, aciRegistry, manifests, compression); err != nil {
return "", fmt.Errorf("error writing squashed image: %v", err)
}
log.Debug("Validating squashed ACI...")
if err := internal.ValidateACI(squashedTempFile.Name()); err != nil {
return "", fmt.Errorf("error validating image: %v", err)
}
if err := os.Rename(squashedTempFile.Name(), squashedImagePath); err != nil {
return "", err
}
log.Debug("ACI squashed!")
return squashedImagePath, nil
}