env[i].Value, env[i].Changed = cfg.EnvOrAndChanged("GOTOOLCHAIN", "")
		case "GODEBUG":
			env[i].Changed = env[i].Value != ""
		}
	}

	if work.GccgoBin != "" {
		env = append(env, cfg.EnvVar{Name: "GCCGO", Value: work.GccgoBin, Changed: true})
	} else {
		env = append(env, cfg.EnvVar{Name: "GCCGO", Value: work.GccgoName})
	}

	goarch, val, changed := cfg.GetArchEnv()
	if goarch != "" {

cui fliter <******@****.***> 1699009739 +0800

  echo '(search for TFCI_WHL_SIZE_LIMIT to change it)'
  ls -sh *.whl
  exit 2
fi

# Quick install checks
venv=$(mktemp -d)
"python${TFCI_PYTHON_VERSION}" -m venv "$venv"
python="$venv/bin/python3"
"$python" -m pip install *.whl $TFCI_PYTHON_VERIFY_PIP_INSTALL_ARGS
if [[ "$TFCI_WHL_IMPORT_TEST_ENABLE" == "1" ]]; then

### Virtual environment with `venv`

You can create an isolated virtual local environment in a directory using Python's `venv` module. Let's do this in the cloned repository (where the `requirements.txt` is):

<div class="termy">

```console
$ python -m venv env
```

</div>

	fmt.Fprintf(w, "<details><summary><code>go env</code> Output</summary><br><pre>\n")
	fmt.Fprintf(w, "$ go env\n")
	printGoEnv(w)
	printGoDetails(w)
	printOSDetails(w)
	printCDetails(w)
	fmt.Fprintf(w, "</pre></details>\n\n")
}

func printGoEnv(w io.Writer) {
	env := envcmd.MkEnv()
	env = append(env, envcmd.ExtraEnvVars()...)

### Virtuelle Umgebung mit `venv`

Sie können mit dem Python-Modul `venv` in einem Verzeichnis eine isolierte virtuelle lokale Umgebung erstellen. Machen wir das im geklonten Repository (da wo sich die `requirements.txt` befindet):

<div class="termy">

```console
$ python -m venv env
```

</div>

	var hasCredentials bool
	//nolint:gocritic
	if env.IsSet(config.EnvRootUser) && env.IsSet(config.EnvRootPassword) {
		user = env.Get(config.EnvRootUser, "")
		password = env.Get(config.EnvRootPassword, "")
		hasCredentials = true
	} else if env.IsSet(config.EnvAccessKey) && env.IsSet(config.EnvSecretKey) {
		user = env.Get(config.EnvAccessKey, "")
		password = env.Get(config.EnvSecretKey, "")
		hasCredentials = true

## 开发

如果你已经克隆了源码仓库，并且需要深入研究代码，下面是设置开发环境的指南。

### 通过 `venv` 管理虚拟环境

你可以使用 Python 的 `venv` 模块在一个目录中创建虚拟环境：

<div class="termy">

```console
$ python -m venv env
```

</div>

这将使用 Python 程序创建一个 `./env/` 目录，然后你将能够为这个隔离的环境安装软件包。

### 激活虚拟环境

使用以下方法激活新环境：

=== "Linux, macOS"

    <div class="termy">

    ```console
    $ source ./env/bin/activate
    ```

    </div>

//
// There is a copy of this code in x/tools/cmd/godoc/goroot.go.
func findGOROOT(env string) string {
	if env == "" {
		// Not using Getenv because findGOROOT is called
		// to find the GOROOT/go.env file. initEnvCache
		// has passed in the setting from the user go/env file.
		env = os.Getenv("GOROOT")
	}
	if env != "" {
		return filepath.Clean(env)
	}
	def := ""
	if r := runtime.GOROOT(); r != "" {

	// but in practice there might be skew
	// This makes sure we all agree.
	cfg.OrigEnv = toolchain.FilterEnv(os.Environ())
	cfg.CmdEnv = envcmd.MkEnv()
	for _, env := range cfg.CmdEnv {
		if os.Getenv(env.Name) != env.Value {
			os.Setenv(env.Name, env.Value)
		}
	}

	cmd.Flag.Usage = func() { cmd.Usage() }
	if cmd.CustomFlags {
		args = args[1:]
	} else {
		base.SetFromGOFLAGS(&cmd.Flag)