)

func MkEnv() []cfg.EnvVar {
	envFile, envFileChanged, _ := cfg.EnvFile()
	env := []cfg.EnvVar{
		{Name: "GO111MODULE", Value: cfg.Getenv("GO111MODULE")},
		{Name: "GOARCH", Value: cfg.Goarch, Changed: cfg.Goarch != runtime.GOARCH},
		{Name: "GOBIN", Value: cfg.GOBIN},
		{Name: "GOCACHE"},
		{Name: "GOENV", Value: envFile, Changed: envFileChanged},
		{Name: "GOEXE", Value: cfg.ExeSuffix},

var CmdEnv []EnvVar

var envCache struct {
	once   sync.Once
	m      map[string]string
	goroot map[string]string
}

// EnvFile returns the name of the Go environment configuration file,
// and reports whether the effective value differs from the default.
func EnvFile() (string, bool, error) {
	if file := os.Getenv("GOENV"); file != "" {
		if file == "off" {
			return "", false, fmt.Errorf("GOENV=off")
		}

//
//	"/.dockerenv":        "file",
//	"/run/.containerenv": "file",
func IsDocker() bool {
	var err error
	for _, envfile := range []string{
		"/.dockerenv",
		"/run/.containerenv",
	} {
		_, err = os.Stat(envfile)
		if err == nil {
			return true
		}
	}
	if osIsNotExist(err) {
		// if none of the files are present we may be running inside