Question

class Chdir:
    """ change in and out of dir """
    def __init__(self, newPath):
        self.newPath = newPath

    def __enter__(self):
        self.savedPath = os.getcwd()
        os.chdir(self.newPath)

    def __exit__(self, etype, value, traceback):
        os.chdir(self.savedPath)

使用上面的，

    ROOT = "/home/username/my-blog/blogname/"
    with Chdir(ROOT):
        print os.path.exists(os.getcwd()+'/.git')
        print os.path.exists(os.getcwd()+'/notes/')
        subprocess.Popen(['git', 'add', '--ignore-removal', 'notes/'])

输出：

True
True
fatal: Not a git repository (or any of the parent directories): .git

从print语句测试中，很明显还存在git repository exists和后续的notes文件夹。但是代码仍然失败

修改用于测试的Shell脚本

  1 echo "Testing ...."
  2 cd /home/username/my-blog/blogname/
  3 git add --ignore-removal notes/
  4 git add --ignore-removal data.json
  5 git status

on source test.sh我得到了通常的模糊

Testing ....
On branch master
Your branch is ahead of 'origin/master' by 1 commit.
  (use "git push" to publish your local commits)
.... etc

完整来源

class Git:

    def __init__(self, message="GitNote Commit"):
        self.message = message


    def __enter__(self):
        with Chdir(ROOT):
            print os.path.exists(os.getcwd()+'/.git')
            print os.path.exists(os.getcwd()+'/notes/')
            subprocess.Popen(['git', 'add', '--ignore-removal', 'notes/'], cwd=ROOT)
            subprocess.Popen(['git', 'add', '--ignore-removal', 'data.json'], cwd=ROOT)
            subprocess.Popen(['git', 'add', '--ignore-removal', 'images/'], cwd=ROOT)
        return self

    def __iter__(self):
        with Chdir(ROOT):
            changed_files = subprocess.check_output(['git','diff',
                            '--name-only','HEAD']).split('\n')[:-1]
            relevant_changes = [f for f in changed_files if f[-3:]=='.md'
                                and os.path.isfile(ROOT+f)]
        for item in relevant_changes:
                yield item

    def __exit__(self,exc_type, exc_value, traceback):
        if exc_type is not None:
            print exc_type, exc_value, traceback
        subprocess.Popen(['git', '--no-pager', 'commit', '-m', self.message])

Answer 1

请尝试设置cwd kwarg of Popen。

如，

subprocess.Popen(['git', 'add', '--ignore-removal', 'notes/'], cwd=ROOT)

为什么这段代码失败了？

1 个答案: