Function getImageRef

core/image.go:206–221

getImageRef returns the image digest if exists, or else returns the image ID.

(client libdocker.DockerClientInterface, image string)

// getImageRef returns the image digest if exists, or else returns the image ID.
func getImageRef(client libdocker.DockerClientInterface, image string) (string, error) {
	img, err := client.InspectImageByRef(image)
	if err != nil {
		return "", err
	}
	if img == nil {
		return "", fmt.Errorf("unable to inspect image %s", image)
	}

	// Returns the digest if it exist.
	if len(img.RepoDigests) > 0 {
		return img.RepoDigests[0], nil
	}

	return img.ID, nil
}

func filterHTTPError(err error, image string) error {
	// docker/docker/pull/11314 prints detailed error info for docker pull.