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Fix Repo() autodiscovery in linked worktrees when GIT_DIR is set by meliezer · Pull Request #2128 · gitpython-developers/GitPython · GitHub
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Fix Repo() autodiscovery in linked worktrees when GIT_DIR is set #2128

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Merged
Byron merged 1 commit into from
May 6, 2026
+58 −0
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Fix Repo() autodiscovery in linked worktrees when GIT_DIR is set #2128

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22 changes: 22 additions & 0 deletions git/repo/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -242,6 +242,28 @@ def __init__(
# It's important to normalize the paths, as submodules will otherwise
# initialize their repo instances with paths that depend on path-portions
# that will not exist after being removed. It's just cleaner.
if (

@Byron Byron Apr 20, 2026

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It seems the comment above this hunk was actually meant for the block below it. So that should be changed. I also think the code block can use some documentation on what it's trying to do.

@Byron Byron Apr 22, 2026

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@meliezer this wasn't addressed though. The comment above wants to be above if is_git_dir(curpath):.

osp.isfile(osp.join(curpath, "gitdir"))
and osp.isfile(osp.join(curpath, "commondir"))
and osp.isfile(osp.join(curpath, "HEAD"))
):
git_dir = curpath

if "GIT_WORK_TREE" in os.environ:
self._working_tree_dir = os.getenv("GIT_WORK_TREE")
Comment on lines +252 to +253

@Byron Byron Apr 20, 2026

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The _working_tree_dir probably starts out as None, and should be set by whatever has the final say, probably the environment variable.
Then if it's not yet set, all this extra work can be done to figure out the worktree dir.

else:
# Linked worktree administrative directories store the path to the
# worktree's .git file in their gitdir file (without "gitdir: " prefix).
with open(osp.join(git_dir, "gitdir")) as fp:
worktree_gitfile = fp.read().strip()

if not osp.isabs(worktree_gitfile):
worktree_gitfile = osp.normpath(osp.join(git_dir, worktree_gitfile))

self._working_tree_dir = osp.dirname(worktree_gitfile)

break

if is_git_dir(curpath):
git_dir = curpath
# from man git-config : core.worktree
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36 changes: 36 additions & 0 deletions test/test_repo.py
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Expand Up @@ -1126,6 +1126,42 @@ def test_git_work_tree_env(self, rw_dir):
self.assertEqual(r.working_tree_dir, repo_dir)
self.assertEqual(r.working_dir, repo_dir)

@with_rw_directory
def test_git_work_tree_env_in_linked_worktree(self, rw_dir):
"""Check that Repo() autodiscovers a linked worktree when GIT_DIR is set."""
git = Git(rw_dir)
if git.version_info[:3] < (2, 5, 1):
raise RuntimeError("worktree feature unsupported (test needs git 2.5.1 or later)")

rw_master = self.rorepo.clone(join_path_native(rw_dir, "master_repo"))
branch = rw_master.create_head("bbbbbbbb")
worktree_path = join_path_native(rw_dir, "worktree_repo")
if Git.is_cygwin():
worktree_path = cygpath(worktree_path)

rw_master.git.worktree("add", worktree_path, branch.name)

git_dir = Git(worktree_path).rev_parse("--git-dir")

patched_env = dict(os.environ)
patched_env["GIT_DIR"] = git_dir
patched_env.pop("GIT_WORK_TREE", None)
patched_env.pop("GIT_COMMON_DIR", None)

with mock.patch.dict(os.environ, patched_env, clear=True):
old_cwd = os.getcwd()
try:
os.chdir(worktree_path)

explicit = Repo(os.getcwd())
autodiscovered = Repo()

self.assertTrue(osp.samefile(explicit.working_tree_dir, worktree_path))
self.assertTrue(osp.samefile(autodiscovered.working_tree_dir, worktree_path))
self.assertTrue(osp.samefile(autodiscovered.working_tree_dir, explicit.working_tree_dir))
finally:
os.chdir(old_cwd)

@with_rw_directory
def test_rebasing(self, rw_dir):
r = Repo.init(rw_dir)
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