dubious ownership error in GitLab CI

[gergelypolonkai]

Describe the bug

While running darker in our GitLab CI, it fails with the following message:

ERROR:darker.git:fatal: detected dubious ownership in repository at '/builds/group/repo'
ERROR:darker.git:To add an exception for this directory, call:
ERROR:darker.git:
ERROR:darker.git:	git config --global --add safe.directory /builds/group/repo

Environment (please complete the following information):

• OS: Kubernetes, running inside the official Python container
• Python version 3.10.13
• Git version 2.39.2
• Darker version 1.7.2
• Black version 22.8.0

Additional context

What makes this strange is that git itself works without a problem after marking the directory as safe. Here’s the output of some debug commands i put into our darker job:

$ git --version
git version 2.39.2
$ cat $HOME/.gitconfig || echo "No config"
cat: /project/.gitconfig: No such file or directory
No config
$ git status || echo "bah"
fatal: detected dubious ownership in repository at '/builds/group/repo'
To add an exception for this directory, call:
	git config --global --add safe.directory /builds/group/repo
bah
$ git config --global --add safe.directory /builds/group/repo
$ cat $HOME/.gitconfig || echo "No config"
[safe]
	directory = /builds/group/repo
$ git status || echo "bah"
HEAD detached at af72d68b1
nothing to commit, working tree clean
$ poetry run darker --diff --revision origin/master... app data_tests tests
ERROR:darker.git:fatal: detected dubious ownership in repository at '/builds/group/repo'
ERROR:darker.git:To add an exception for this directory, call:
ERROR:darker.git:
ERROR:darker.git:	git config --global --add safe.directory /builds/group/repo

The directory itself (/builds/group/repo) is owned by root and has permissions 0777. The whole CI process is running as user app (UID 1000).

[akaihola]

Hi @gergelypolonkai,

Could you add -vv to Darker arguments to get more debug output?