Function NewDigest

pkg/name/digest.go:102–133

NewDigest returns a new Digest representing the given name.

(name string, opts ...Option)

// NewDigest returns a new Digest representing the given name.
func NewDigest(name string, opts ...Option) (Digest, error) {
	// Split on "@"
	parts := strings.Split(name, digestDelim)
	if len(parts) != 2 {
		return Digest{}, newErrBadName("a digest must contain exactly one '@' separator (e.g. registry/repository@digest) saw: %s", name)
	}
	base := parts[0]
	dig := parts[1]
	prefix := digest.Canonical.String() + ":"
	if !strings.HasPrefix(dig, prefix) {
		return Digest{}, newErrBadName("unsupported digest algorithm: %s", dig)
	}
	hex := strings.TrimPrefix(dig, prefix)
	if err := digest.Canonical.Validate(hex); err != nil {
		return Digest{}, err
	}

	tag, err := NewTag(base, opts...)
	if err == nil {
		base = tag.Repository.Name()
	}

	repo, err := NewRepository(base, opts...)
	if err != nil {
		return Digest{}, err
	}
	return Digest{
		Repository: repo,
		digest:     dig,
		original:   name,
	}, nil
}