package image import ( "fmt" "github.com/containers/image/docker/reference" ) // imageParts describes the parts of an image's name type imageParts struct { transport string registry string name string tag string isTagged bool hasRegistry bool } // decompose breaks an input name into an imageParts description func decompose(input string) (imageParts, error) { var ( parts imageParts hasRegistry bool tag string ) imgRef, err := reference.Parse(input) if err != nil { return parts, err } ntag, isTagged := imgRef.(reference.NamedTagged) if !isTagged { tag = "latest" if _, hasDigest := imgRef.(reference.Digested); hasDigest { tag = "none" } } else { tag = ntag.Tag() } registry := reference.Domain(imgRef.(reference.Named)) if registry != "" { hasRegistry = true } imageName := reference.Path(imgRef.(reference.Named)) return imageParts{ registry: registry, hasRegistry: hasRegistry, name: imageName, tag: tag, isTagged: isTagged, transport: DefaultTransport, }, nil } // assemble concatenates an image's parts into a string func (ip *imageParts) assemble() string { return fmt.Sprintf("%s/%s:%s", ip.registry, ip.name, ip.tag) } // assemble concatenates an image's parts with transport into a string func (ip *imageParts) assembleWithTransport() string { return fmt.Sprintf("%s%s/%s:%s", ip.transport, ip.registry, ip.name, ip.tag) }