检查 repo 是否脏时出现 gitpython 错误

Question

I receive an error while trying to use gitpython to check if a repository is dirty, ie has uncommitted changed to tracked files:

import git
repo = git.Repo('')
print repo.is_dirty()

The error:

Traceback (most recent call last):
  File "C:\dev\my_prog\test.py", line 8, in <module>
    print repo.is_dirty()
  File "C:\Python27\lib\site-packages\gitpython-0.3.2.rc1-py2.7.egg\git\repo\base.py", line 502, in is_dirty
    len(self.git.diff('HEAD', '--cached', *default_args)):
  File "C:\Python27\lib\site-packages\gitpython-0.3.2.rc1-py2.7.egg\git\cmd.py", line 227, in <lambda>
    return lambda *args, **kwargs: self._call_process(name, *args, **kwargs)
  File "C:\Python27\lib\site-packages\gitpython-0.3.2.rc1-py2.7.egg\git\cmd.py", line 456, in _call_process
    return self.execute(call, **_kwargs)
  File "C:\Python27\lib\site-packages\gitpython-0.3.2.rc1-py2.7.egg\git\cmd.py", line 377, in execute
    raise GitCommandError(command, status, stderr_value)
git.exc.GitCommandError: 'git diff HEAD --cached --abbrev=40 --full-index --raw' returned exit status 1:

How come? What could be the problem?
Notice I'm working on Windows 7 with msysgit

Answer 1

Considering the history of diff.py (which hasn't changed much), it is possible that the " git diff HEAD --cached ... " command fails for some reason in your repo.
In other words, it is likely to be linked to your specific local repo than it is to be an implementation issue in the repo.is_dirty() method.

The surest way to debug it is to execute it directly and see what the error message is.

Answer 2

Try Updating gitpython and msysgit. When using GitPython0.3.2 and msysgit 1.7.9 --> repo.is_dirty() Returns an error. When using GitPython 0.3.2 and msysgit 1.9.1 --> repo.is_dirty() returns a valid value. Hope it helps.

Answer 3

In my case I tried to run git in the command line, getting a more specific error:

>git diff HEAD --cached --abbrev=40 --full-index --raw
cannot spawn less: No such file or directory

I solved putting the bin folder of msysgit in path:

>set PATH=C:\Program Files\Git\mingw64\bin;%PATH%

Note that I have also set the variable GIT_PYTHON_GIT_EXECUTABLE https://github.com/gitpython-developers/GitPython/issues/26 , but I don't think it's relative to this error