func main()

in container/go/cmd/flattener/flattener.go [39:74]

• 36 lines of code
• 10 McCabe index (conditional complexity)

func main() {
	flag.Var(&layers, "layer", "One or more layers with the following comma separated values (Compressed layer tarball, Uncompressed layer tarball, digest file, diff ID file). e.g., --layer layer.tar.gz,layer.tar,<file with digest>,<file with diffID>.")
	flag.Parse()
	if *outTarball == "" {
		log.Fatalln("Option --filesystem is required.")
	}
	if *outConfig == "" {
		log.Fatalln("Option --metadata is required.")
	}
	if *imgConfig == "" {
		log.Fatalln("Option --config is required.")
	}
	imgParts, err := compat.ImagePartsFromArgs(*imgConfig, *baseManifest, *imgTarball, layers)
	if err != nil {
		log.Fatalf("Unable to determine parts of the image from the specified arguments: %v", err)
	}
	img, err := compat.ReadImage(imgParts)
	if err != nil {
		log.Fatalf("Error reading image: %v", err)
	}
	c, err := img.RawConfigFile()
	if err != nil {
		log.Fatalf("Unable to get config from image: %v", err)
	}
	if err := ioutil.WriteFile(*outConfig, c, os.ModePerm); err != nil {
		log.Fatalf("Unable to write image config to %s: %v", *outConfig, err)
	}
	o := mutate.Extract(img)
	f, err := os.Create(*outTarball)
	if err != nil {
		log.Fatalf("Unable to create output flattened tarball file %s: %v", *outTarball, err)
	}
	if _, err := io.Copy(f, o); err != nil {
		log.Fatalf("Unable to write to output flattened tarball file %s: %v", *outTarball, err)
	}
}