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Accepted
Nick Volynkin
Asked:2020-09-26 11:22:50 +0000 UTC2020-09-26 11:22:50 +0000 UTC

调用任务中“系统找不到指定的路径”

  • 772

将使用invoke (v 0.21)编写的任务从 *nix 移植到 Windows。任何使用都会ctx.run导致异常。

任务.py：

from invoke import task

@task
def hello(ctx):
    ctx.run('echo Hello')

Git bash 和 cmd.exe 的结果是一样的：

C:\...>invoke hello

Traceback (most recent call last):
  File "c:\python36\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\python36\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Python36\Scripts\invoke.exe\__main__.py", line 9, in <module>
  File "c:\python36\lib\site-packages\invoke\program.py", line 293, in run
    self.execute()
  File "c:\python36\lib\site-packages\invoke\program.py", line 414, in execute
    executor.execute(*self.tasks)
  File "c:\python36\lib\site-packages\invoke\executor.py", line 129, in execute
    result = call.task(*args, **call.kwargs)
  File "c:\python36\lib\site-packages\invoke\tasks.py", line 115, in __call__
    result = self.body(*args, **kwargs)
  File "C:\...\tasks.py", line 5, in hello
    ctx.run('echo Hello')
  File "c:\python36\lib\site-packages\invoke\context.py", line 82, in run
    return self._run(runner, command, **kwargs)
  File "c:\python36\lib\site-packages\invoke\context.py", line 89, in _run
    return runner.run(command, **kwargs)
  File "c:\python36\lib\site-packages\invoke\runners.py", line 262, in run
    return self._run_body(command, **kwargs)
  File "c:\python36\lib\site-packages\invoke\runners.py", line 276, in _run_body
    self.start(command, shell, env)
  File "c:\python36\lib\site-packages\invoke\runners.py", line 981, in start
    stdin=PIPE,
  File "c:\python36\lib\subprocess.py", line 707, in __init__
    restore_signals, start_new_session)
  File "c:\python36\lib\subprocess.py", line 992, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 3] The system cannot find the path specified

虽然没有这样的错误：

C:\...>echo Hello
Hello

这是变量中的内容%PATH%：

C:\Python36\Scripts\;C:\Python36\;C:\Python27\;C:\Python27\Scripts;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C: \Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files (x86)\Code Collaborator Client;C:\Program Files (x86)\CollabNet Subversion;C:\Program Files\Git\cmd;C:\Program Files\Git\mingw64\bin;C:\Program Files\Git\usr\bin;C:\ProgramData\chocolatey\bin;

如果我通过 Git bash 运行 cmd，那么就像这样：

C:\Users\nvolynkin\bin;C:\Program Files\Git\mingw64\bin;C:\Program Files\Git\usr\local\bin;C:\Program Files\Git\usr\bin;C:\ Program Files\Git\usr\bin;C:\Program Files\Git\mingw64\bin;C:\Program Files\Git\usr\bin;C:\Users\nvolynkin\bin;C:\Python36\Scripts;C :\Python36;C:\Python27;C:\Python27\Scripts;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0; C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files (x86)\Code Collaborator Client;C:\Program Files (x86)\CollabNet Subversion;C:\Program Files \Git\cmd;C:\Program Files\Git\mingw64\bin;C:\Program Files\Git\usr\bin;C:\ProgramData\chocolatey\bin;C:\Program Files\Git\usr\bin\ vendor_perl;C:\Program Files\Git\usr\bin\core_perl

我检查了两个版本中的所有路径%PATH%。没有目录，我创建了它们，但问题仍然存在。

下一步去哪里挖？

同时，了解通话中使用哪种终端会很有趣ctx.run？它看起来像是 cmd.exe，但与我运行Win+R > cmd或cmd.exe从 Git bash 打开的不同。

python

1 个回答

  1. Best Answer

    该问题是已知的，并且正在修复 Windows拉取请求中的错误外壳。

    task目前，您可以在运行时直接修补装饰器。代码取自datakortet/dk-tasklib 存储库。由于invoke 0.21已经发布了，但是问题并没有解决，所以我将条件中的版本提高到了22。

    import invoke
from invoke import task as _task


if invoke.__version_info__ < (0, 22):
    # https://github.com/pyinvoke/invoke/pull/407
    from invoke import Context

    if not getattr(Context, '_patched', False):
        Context._patched = True
        _orig_run = Context.run


        def run(self, command, **kwargs):
            if sys.platform == 'win32':
                kwargs['shell'] = os.environ['COMSPEC']
            return _orig_run(self, command, **kwargs)

        Context.run = run

task = _task

    如果您只需要在 Windows 上执行任务，那么您可以更简单地解决该问题。

    1. 在invoke.yml与tasks.py.

    2. 向其中添加以下代码：

      run:
  shell: C:\Windows\System32\cmd.exe
    • 3

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