kubernetes/vendor/sigs.k8s.io/kustomize/api/internal/image/image.go

// IsImageMatched returns true if the value of t is identical to the
// image name in the full image name and tag as given by s.
func IsImageMatched(s, t string) bool { … }

// Split separates and returns the name and tag parts
// from the image string using either colon `:` or at `@` separators.
// image reference pattern: [[host[:port]/]component/]component[:tag][@digest]
func Split(imageName string) (name string, tag string, digest string) { … }