Function validateMetadata

version.go:764–774

From the spec, "Build metadata MAY be denoted by appending a plus sign and a series of dot separated identifiers immediately following the patch or pre-release version. Identifiers MUST comprise only ASCII alphanumerics and hyphen [0-9A-Za-z-]. Identifiers MUST NOT be empty."

(m string)

// following the patch or pre-release version. Identifiers MUST comprise only
// ASCII alphanumerics and hyphen [0-9A-Za-z-]. Identifiers MUST NOT be empty."
func validateMetadata(m string) error {
	eparts := strings.Split(m, ".")
	for _, p := range eparts {
		if p == "" {
			return ErrInvalidMetadata
		} else if !containsOnly(p, allowed) {
			return ErrInvalidMetadata
		}
	}
	return nil
}

// validateVersion checks for common validation issues but may not catch all errors
func validateVersion(m []string) error {