// Builder returns the empty string.
func Builder() string {
	return os.Getenv("GO_BUILDER_NAME")
}

// HasGoBuild reports whether the current system can build programs with “go build”
// and then run them with os.StartProcess or exec.Command.
func HasGoBuild() bool {
	if os.Getenv("GO_GCFLAGS") != "" {
		// It's too much work to require every caller of the go command

		if _, err := os.Stat("/etc/alpine-release"); err == nil {
			globalSkip = func(t *testing.T) { t.Skip("skipping failing test on alpine - go.dev/issue/19938") }
			return m.Run()
		}
	}
	if !testenv.HasGoBuild() {
		// Checking for "go build" is a proxy for whether or not we can run "go env".
		globalSkip = func(t *testing.T) { t.Skip("no go build") }
		return m.Run()
	}

	GOOS = goEnv("GOOS")
	GOARCH = goEnv("GOARCH")