Function ValidateDockerCompat

pkg/identifiers/validate.go:36–46

ValidateDockerCompat implements docker compatible identifier validation. The containerd implementation allows single character identifiers, while the Docker compatible implementation requires at least 2 characters for identifiers. The containerd implementation enforces a maximum length constraint of

(s string)

// The containerd implementation enforces a maximum length constraint of 76 characters,
// while the Docker compatible implementation omits the length check entirely.
func ValidateDockerCompat(s string) error {
	if len(s) == 0 {
		return fmt.Errorf("identifier must not be empty %w", errdefs.ErrInvalidArgument)
	}

	if !AllowedIdentifierPattern.MatchString(s) {
		return fmt.Errorf("identifier %q must match pattern %q: %w", s, AllowedIdentfierChars, errdefs.ErrInvalidArgument)
	}

	return nil
}