// than most modules (semver).
func ModCompare(path string, x, y string) int {
	if path == "go" {
		return Compare(x, y)
	}
	if path == "toolchain" {
		return Compare(maybeToolchainVersion(x), maybeToolchainVersion(y))
	}
	return semver.Compare(x, y)
}

// ModSort is like module.Sort but understands the "go" and "toolchain"
// modules and their version ordering.
func ModSort(list []module.Version) {

	} else {
		return ""
	}
	// Some builds use custom suffixes; strip them.
	if i := strings.IndexAny(v, " \t-"); i >= 0 {
		v = v[:i]
	}
	if !IsValid(v) {
		return ""
	}
	return v
}

func maybeToolchainVersion(name string) string {
	if IsValid(name) {
		return name
	}
	return FromToolchain(name)
}

// ToolchainMax returns the maximum of x and y interpreted as toolchain names,