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GitCommandError: Cmd('git') failed due to: exit code(1) when execute 'grep' with regex#1164

Answeredbyrmahdav
rmahdav asked this question inQ&A
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Hi,

I am trying to execute a grep command with regex using the execute() function. A part of my code is:

for item in toggles:    files_result = Repo.execute(["git", "grep", "--files-with-matches", "\"config.isEnabled([[:space:]*]'" + item + "'[[:space:]*])\""])

I am getting the following error:

---------------------------------------------------------------------------GitCommandError                           Traceback (most recent call last)<ipython-input-82-f4329c19384f> in <module>      3       4 for item in toggles:----> 5     files_result = Repo.execute(["git", "grep", "--files-with-matches", "\"config.isEnabled([[:space:]*]'" + item + "'[[:space:]*])\""])      6     files = files_result.splitlines()      7 /opt/anaconda3/lib/python3.8/site-packages/git/cmd.py in execute(self, command, istream, with_extended_output, with_exceptions, as_process, output_stream, stdout_as_string, kill_after_timeout, with_stdout, universal_newlines, shell, env, max_chunk_size, **subprocess_kwargs)    820     821         if with_exceptions and status != 0:--> 822             raise GitCommandError(command, status, stderr_value, stdout_value)    823     824         if isinstance(stdout_value, bytes) and stdout_as_string:  # could also be output_streamGitCommandError: Cmd('git') failed due to: exit code(1)  cmdline: git grep --files-with-matches "config.isEnabled([[:space:]*]'async-payments'[[:space:]*])"

However, when I rungit grep --files-with-matches "config.isEnabled([[:space:]*]'async-payments'[[:space:]*])" in the command line, it works.

I appreciate any help.

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The issue is resolved by removing\" from the"\"config.isEnabled([[:space:]*]'" + item + "'[[:space:]*])\"".

Another issue comes up now. If the result of executinggrep function is empty, I am getting the same errorGitCommandError: Cmd('git') failed due to: exit code(1) . When there is any result, it works fine.

Any ideas to solve this?

Replies: 4 comments 1 reply

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It’s unlikely git is executed in the correct directory, which is why one would rather instantiate aRepo instance first along the lines ofr = git.Repo(path). Then invoke git liker.git.grep("--files-with-matches", "\"config.isEnabled([[:space:]*]'" + item + "'[[:space:]*])\""]).

Docs forhow to invoke git, and herefor the troubleshooting.

Please feel free to keep posting into the closed issue for follow ups.

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Thanks for the response.Repo is my code came fromRepo = git.Git(os.path.expanduser(path)), so the directory was correct. However, I did what you said but I am getting the same error.

---------------------------------------------------------------------------GitCommandError                           Traceback (most recent call last)<ipython-input-94-9b1915237b33> in <module>      3 r = Repo(path)      4 for item in toggles:----> 5     files_result = r.git.grep("--files-with-matches", "\"config.isEnabled([[:space:]*]'" + item + "'[[:space:]*])\"")      6     #files_result = r.execute(["git", "grep", "--files-with-matches", "\"config.isEnabled([[:space:]*]'" + item + "'[[:space:]*])\""])      7     files = files_result.splitlines()/opt/anaconda3/lib/python3.8/site-packages/git/cmd.py in <lambda>(*args, **kwargs)    540         if name[0] == '_':    541             return LazyMixin.__getattr__(self, name)--> 542         return lambda *args, **kwargs: self._call_process(name, *args, **kwargs)    543     544     def set_persistent_git_options(self, **kwargs):/opt/anaconda3/lib/python3.8/site-packages/git/cmd.py in _call_process(self, method, *args, **kwargs)   1003         call.extend(args)   1004 -> 1005         return self.execute(call, **exec_kwargs)   1006    1007     def _parse_object_header(self, header_line):/opt/anaconda3/lib/python3.8/site-packages/git/cmd.py in execute(self, command, istream, with_extended_output, with_exceptions, as_process, output_stream, stdout_as_string, kill_after_timeout, with_stdout, universal_newlines, shell, env, max_chunk_size, **subprocess_kwargs)    820     821         if with_exceptions and status != 0:--> 822             raise GitCommandError(command, status, stderr_value, stdout_value)    823     824         if isinstance(stdout_value, bytes) and stdout_as_string:  # could also be output_streamGitCommandError: Cmd('git') failed due to: exit code(1)  cmdline: git grep --files-with-matches "config.isEnabled([[:space:]*]'async-payments'[[:space:]*])"
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The issue is resolved by removing\" from the"\"config.isEnabled([[:space:]*]'" + item + "'[[:space:]*])\"".

Another issue comes up now. If the result of executinggrep function is empty, I am getting the same errorGitCommandError: Cmd('git') failed due to: exit code(1) . When there is any result, it works fine.

Any ideas to solve this?

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Answer selected byByron
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By the looks of it, there isno way to ignore a non-zero exit code nor does git grep allow to ignore empty results.

As you are effectively executing the git program, maybe it’s easiest to call git yourself.

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1 reply
@glensc
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Here's my "trick" to catch exit code 1

try:returnself.repo.git.grep("-l",pattern)exceptGitCommandErrorasexc:# git grep exits with status 1 when there are no matches; treat as an empty resultifexc.status==1:return []# Re-raise unexpected git errorsraise
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@rmahdav@Byron@glensc
Converted from issue

This discussion was converted from issue#1074 on February 26, 2021 11:18.

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