}

func initEnvCache() {
	envCache.m = make(map[string]string)
	envCache.goroot = make(map[string]string)
	if file, _, _ := EnvFile(); file != "" {
		readEnvFile(file, "user")
	}
	goroot := findGOROOT(envCache.m["GOROOT"])
	if goroot != "" {
		readEnvFile(filepath.Join(goroot, "go.env"), "GOROOT")
	}

	// Save the goroot for func init calling SetGOROOT,
	// and also overwrite anything that might have been in go.env.