使用fetch命令获取Chromium遇FileNotFoundError，环境变量修复无效求解决

问题背景 #

使用fetch命令获取Chromium代码时触发FileNotFoundError: [WinError 2] 系统找不到指定的文件，已尝试添加DEPOT_TOOLS_WIN_TOOLCHAIN系统环境变量但问题未解决。错误栈如下：

[0:00:00] Started.
Traceback (most recent call last):
  File "C:\src\depot_tools\metrics.py", line 301, in print_notice_and_exit
    yield
  File "C:\src\depot_tools\gclient.py", line 3495, in <module>
    sys.exit(main(sys.argv[1:]))
  File "C:\src\depot_tools\gclient.py", line 3481, in main
    return dispatcher.execute(OptionParser(), argv)
  File "C:\src\depot_tools\subcommand.py", line 252, in execute
    return command(parser, args[1:])
  File "C:\src\depot_tools\gclient.py", line 3032, in CMDsync
    ret = client.RunOnDeps('update', args)
  File "C:\src\depot_tools\gclient.py", line 2026, in RunOnDeps
    work_queue.flush(revision_overrides,
  File "C:\src\depot_tools\gclient_utils.py", line 1016, in flush
    reraise(e[0], e[1], e[2])
  File "C:\src\depot_tools\gclient_utils.py", line 70, in reraise
    raise value
  File "C:\src\depot_tools\gclient_utils.py", line 1093, in run
    self.item.run(*self.args, **self.kwargs)
  File "C:\src\depot_tools\gclient.py", line 1005, in run
    self._got_revision = self._used_scm.RunCommand(command, options, args,
  File "C:\src\depot_tools\gclient_scm.py", line 128, in RunCommand
    return getattr(self, command)(options, args, file_list)
  File "C:\src\depot_tools\gclient_scm.py", line 610, in update
    mirror = self._GetMirror(url, options, revision, revision_ref)
  File "C:\src\depot_tools\gclient_scm.py", line 1060, in _GetMirror
    if not self.cache_dir:
  File "C:\src\depot_tools\gclient_scm.py", line 225, in cache_dir
    return git_cache.Mirror.GetCachePath()
  File "C:\src\depot_tools\git_cache.py", line 193, in GetCachePath
    cachepath = subprocess.check_output(
  File "C:\src\depot_tools\.cipd_bin\3.8\bin\Lib\subprocess.py", line 415, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
  File "C:\src\depot_tools\.cipd_bin\3.8\bin\Lib\subprocess.py", line 493, in run
    with Popen(*popenargs, **kwargs) as process:
  File "C:\src\depot_tools\.cipd_bin\3.8\bin\Lib\subprocess.py", line 858, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "C:\src\depot_tools\.cipd_bin\3.8\bin\Lib\subprocess.py", line 1311, in _execute_child
    hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
FileNotFoundError: [WinError 2] The system cannot find the file specified
Subprocess failed with return code 1.

可行解决方案 #

• 检查Git的安装与PATH配置
  打开命令提示符执行git --version，若提示找不到命令，说明Git未安装或未加入系统PATH。安装Git时务必勾选「Add Git to PATH」选项，或手动将Git的bin目录（如C:\Program Files\Git\bin）添加至系统环境变量PATH，重启终端后重试。

• 正确配置DEPOT_TOOLS_WIN_TOOLCHAIN变量
  该变量需设置为0而非空值：

  1. 右键「此电脑」→「属性」→「高级系统设置」→「环境变量」
  2. 在「系统变量」区域新建变量，名称为DEPOT_TOOLS_WIN_TOOLCHAIN，值设为0
  3. 重启电脑或终端使配置生效

• 重置depot_tools工具集
  进入C:\src\depot_tools目录，依次执行以下命令更新工具到最新版本：

  git reset --hard
  git pull
  

• 使用管理员权限执行命令
  右键命令提示符或PowerShell选择「以管理员身份运行」，再执行fetch chromium，避免权限不足导致的文件访问问题。

• 清理缓存并重新初始化
  删除C:\src目录下的.gclient和.gclient_entries文件，然后重新执行fetch chromium命令从头初始化。

内容的提问来源于stack exchange，提问作者jevilbutworse