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Add relpath test for Windows error coverage
  • Loading branch information
m-rsha committed Oct 31, 2022
commit 3a3fe94760488e3e5d9f2f873194fa54c613eaf0
8 changes: 4 additions & 4 deletions pre_commit/main.py
Original file line number Diff line number Diff line change
Expand Up @@ -165,14 +165,14 @@ def _adjust_args_and_chdir(args: argparse.Namespace) -> None:
toplevel = git.get_root()
os.chdir(toplevel)

# https://github.com/pre-commit/pre-commit/issues/2530
# `os.relpath` raises a ValueError on Windows when the paths given are on
# separate drives.
try:
args.config = os.path.relpath(args.config)
# https://github.com/pre-commit/pre-commit/issues/2530
# os.relpath will fail with a ValueError if the two directories are on
# two different drives on Windows and since the path is made relative
# for display purposes only we can ignore the error
except ValueError:
pass

if args.command in {'run', 'try-repo'}:
args.files = [os.path.relpath(filename) for filename in args.files]
if args.commit_msg_filename is not None:
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7 changes: 7 additions & 0 deletions tests/main_test.py
Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,13 @@ def test_adjust_args_and_chdir_not_in_git_dir(in_tmpdir):
main._adjust_args_and_chdir(_args())


def test_adjust_args_and_chdir_relpath_to_different_drive():
args = _args(command='run', files=['f1', 'f2'])
with mock.patch.object(os.path, 'relpath', side_effect=ValueError):
with pytest.raises(ValueError):
main._adjust_args_and_chdir(args)


def test_adjust_args_and_chdir_noop(in_git_dir):
args = _args(command='run', files=['f1', 'f2'])
main._adjust_args_and_chdir(args)
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