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# This module is part of GitPython and is released under the
# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
from functools import partial
from pathlib import Path
from unittest import mock
import pytest
from git import Git, Remote, Repo, RootModule, Submodule
from git.exc import GitCommandError
def _commit_file(repo, content):
Path(repo.working_tree_dir, "file").write_text(content, encoding="utf-8")
repo.index.add(["file"])
return repo.index.commit("Write " + content)
def _cached_remote_refs(repo):
return {ref.path: ref.commit.hexsha for remote in repo.remotes for ref in remote.refs}
@pytest.fixture
def local_submodule(tmp_path):
"""Use only local repositories, with two commits already available in the clone."""
with Repo.init(tmp_path / "source") as source, Repo.init(tmp_path / "parent") as parent:
# RootModule's URL-change handling currently assumes a master branch.
source.git.symbolic_ref("HEAD", "refs/heads/master")
_commit_file(source, "initial")
_commit_file(source, "cached")
submodule = parent.create_submodule(
"module", "module", source.working_tree_dir, branch=source.head.reference.name
)
parent.index.commit("Add submodule")
with submodule.module() as module:
yield submodule, source, module
@pytest.fixture(params=["submodule", "root", "repo"])
def update_submodule(request, local_submodule):
submodule, _, _ = local_submodule
if request.param == "submodule":
return submodule.update
if request.param == "root":
update = RootModule(submodule.repo).update
else:
update = submodule.repo.submodule_update
return partial(update, previous_commit=submodule.repo.head.commit, recursive=False)
@pytest.fixture(params=["missing", "deinitialized"])
def uninitialized_submodule(request, local_submodule):
submodule, _, module = local_submodule
metadata = Path(module.git_dir)
module.close()
if request.param == "deinitialized":
submodule.deinit()
else:
submodule.remove(configuration=False, force=True)
assert not submodule.module_exists()
assert metadata.is_dir() == (request.param == "deinitialized")
return submodule, metadata
@pytest.mark.parametrize("no_fetch", [None, False, True], ids=["default", "fetch", "no-fetch"])
def test_update_no_fetch_checks_out_cached_commit(local_submodule, update_submodule, no_fetch):
submodule, source, module = local_submodule
module.create_remote("backup", source.working_tree_dir)
module.head.reset("HEAD~1", index=True, working_tree=True)
assert module.head.commit.binsha != submodule.binsha
options = {} if no_fetch is None else {"no_fetch": no_fetch}
with mock.patch.object(Remote, "fetch", autospec=True, side_effect=Remote.fetch) as fetch:
update_submodule(**options)
assert module.head.commit.binsha == submodule.binsha
assert Path(submodule.abspath, "file").read_text(encoding="utf-8") == "cached"
assert fetch.call_count == (0 if no_fetch else 2)
assert {call[0][0].name for call in fetch.call_args_list} == (set() if no_fetch else {"origin", "backup"})
def test_update_no_fetch_to_latest_revision_uses_cached_tip(local_submodule, update_submodule):
submodule, source, module = local_submodule
cached_tip = module.head.reference.tracking_branch().commit
module.head.reset("HEAD~1", index=True, working_tree=True)
submodule.binsha = module.head.commit.binsha
submodule.repo.index.add([submodule])
submodule.repo.index.commit("Pin submodule to initial commit")
remote_tip = _commit_file(source, "remote-only")
assert submodule.binsha != cached_tip.binsha != remote_tip.binsha
with mock.patch.object(Remote, "fetch", side_effect=AssertionError("Unexpected fetch")) as fetch:
update_submodule(no_fetch=True, to_latest_revision=True)
fetch.assert_not_called()
assert module.head.commit == cached_tip
assert module.head.reference.tracking_branch().commit == cached_tip
assert Path(submodule.abspath, "file").read_text(encoding="utf-8") == "cached"
def test_update_no_fetch_cannot_check_out_missing_commit(local_submodule, update_submodule):
submodule, source, module = local_submodule
cached_tip = module.head.commit
submodule.binsha = _commit_file(source, "remote-only").binsha
submodule.repo.index.add([submodule])
submodule.repo.index.commit("Pin submodule to uncached commit")
with mock.patch.object(Remote, "fetch", side_effect=AssertionError("Unexpected fetch")) as fetch:
with pytest.raises(GitCommandError, match="merge-base"):
update_submodule(no_fetch=True)
fetch.assert_not_called()
assert module.head.commit == cached_tip
assert module.head.reference.tracking_branch().commit == cached_tip
assert Path(submodule.abspath, "file").read_text(encoding="utf-8") == "cached"
@pytest.mark.parametrize("uninitialized_submodule", ["missing"], indirect=True)
@pytest.mark.parametrize("keep_going", [False, True], ids=["raise", "keep-going"])
def test_update_no_fetch_rejects_missing_submodule(uninitialized_submodule, update_submodule, keep_going, caplog):
submodule, metadata = uninitialized_submodule
parent_config = Path(submodule.repo.git_dir, "config").read_bytes()
with mock.patch.object(Remote, "fetch") as fetch, mock.patch.object(Submodule, "_clone_repo") as clone:
if keep_going:
update_submodule(no_fetch=True, keep_going=True)
assert "fetching is disabled" in caplog.text
else:
with pytest.raises(ValueError, match="fetching is disabled"):
update_submodule(no_fetch=True)
fetch.assert_not_called()
clone.assert_not_called()
assert not submodule.module_exists()
assert not Path(submodule.abspath, ".git").exists()
assert not metadata.exists()
assert Path(submodule.repo.git_dir, "config").read_bytes() == parent_config
@pytest.mark.parametrize(
"options",
[
pytest.param({"init": False}, id="init-false"),
pytest.param({"dry_run": True}, id="dry-run"),
],
)
def test_update_no_fetch_can_skip_uninitialized_submodule(uninitialized_submodule, update_submodule, options):
submodule, metadata = uninitialized_submodule
retained_metadata = metadata.is_dir()
parent_config = Path(submodule.repo.git_dir, "config").read_bytes()
with mock.patch.object(Remote, "fetch") as fetch, mock.patch.object(Submodule, "_clone_repo") as clone:
update_submodule(no_fetch=True, **options)
fetch.assert_not_called()
clone.assert_not_called()
assert not submodule.module_exists()
assert not Path(submodule.abspath, ".git").exists()
assert metadata.is_dir() == retained_metadata
assert Path(submodule.repo.git_dir, "config").read_bytes() == parent_config
@pytest.mark.parametrize("to_latest_revision", [False, True], ids=["gitlink", "cached-tip"])
@pytest.mark.parametrize("keep_going", [False, True], ids=["raise", "keep-going"])
def test_update_no_fetch_restores_deinitialized_submodule(
local_submodule, update_submodule, to_latest_revision, keep_going, caplog
):
submodule, source, module = local_submodule
tracking_branch = module.head.reference.tracking_branch()
cached_tip = tracking_branch.commit
branch_path = module.head.reference.path
cached_refs = _cached_remote_refs(module)
module.head.reset("HEAD~1", index=True, working_tree=True)
assert module.head.commit != cached_tip
if to_latest_revision:
submodule.binsha = module.head.commit.binsha
submodule.repo.index.add([submodule])
submodule.repo.index.commit("Pin submodule to initial commit")
assert submodule.binsha != cached_tip.binsha
metadata = Path(module.git_dir)
module.close()
submodule.deinit(force=True)
assert not submodule.module_exists()
assert metadata.is_dir()
remote_tip = _commit_file(source, "remote-only")
assert remote_tip != cached_tip
with mock.patch.object(Remote, "fetch") as fetch, mock.patch.object(Submodule, "_clone_repo") as clone:
update_submodule(no_fetch=True, to_latest_revision=to_latest_revision, keep_going=keep_going)
fetch.assert_not_called()
clone.assert_not_called()
assert not caplog.records
assert submodule.module_exists()
assert Path(submodule.abspath, ".git").is_file()
with submodule.module() as restored:
assert Path(restored.git_dir).samefile(metadata)
assert restored.head.commit == cached_tip
assert restored.head.reference.path == branch_path
assert restored.head.reference.tracking_branch().path == tracking_branch.path
assert _cached_remote_refs(restored) == cached_refs
assert Path(submodule.abspath, "file").read_text(encoding="utf-8") == "cached"
assert not restored.is_dirty(untracked_files=True)
with submodule.repo.config_reader() as reader:
assert reader.get_value(f'submodule "{submodule.name}"', "url") == submodule.url
@pytest.mark.parametrize("no_fetch", [None, False], ids=["default", "fetch"])
def test_update_after_deinit_fetches_remote_tip(local_submodule, update_submodule, no_fetch):
submodule, source, module = local_submodule
metadata = Path(module.git_dir)
module.close()
submodule.deinit()
remote_tip = _commit_file(source, "remote-only")
options = {} if no_fetch is None else {"no_fetch": no_fetch}
with mock.patch.object(Remote, "fetch", autospec=True, side_effect=Remote.fetch) as fetch:
with mock.patch.object(Submodule, "_clone_repo") as clone:
update_submodule(to_latest_revision=True, **options)
clone.assert_not_called()
fetch.assert_called_once()
assert fetch.call_args[0][0].name == "origin"
assert Path(fetch.call_args[0][0].repo.git_dir).samefile(metadata)
with submodule.module() as restored:
assert Path(restored.git_dir).samefile(metadata)
assert restored.head.commit == remote_tip
assert restored.head.reference.tracking_branch().commit == remote_tip
assert Path(submodule.abspath, "file").read_text(encoding="utf-8") == "remote-only"
@pytest.mark.parametrize("uninitialized_submodule", ["deinitialized"], indirect=True)
def test_update_no_fetch_preserves_nonempty_deinitialized_checkout(uninitialized_submodule, update_submodule):
submodule, metadata = uninitialized_submodule
checkout_file = Path(submodule.abspath, "file")
checkout_file.write_text("user content", encoding="utf-8")
parent_config = Path(submodule.repo.git_dir, "config").read_bytes()
with mock.patch.object(Remote, "fetch") as fetch, mock.patch.object(Submodule, "_clone_repo") as clone:
with pytest.raises(OSError, match="does already exist and is non-empty"):
update_submodule(no_fetch=True)
fetch.assert_not_called()
clone.assert_not_called()
assert checkout_file.read_text(encoding="utf-8") == "user content"
assert not Path(submodule.abspath, ".git").exists()
assert metadata.is_dir()
assert Path(submodule.repo.git_dir, "config").read_bytes() == parent_config
@pytest.mark.parametrize("no_fetch", [False, True], ids=["fetch", "no-fetch"])
def test_update_no_fetch_is_recursive(local_submodule, update_submodule, no_fetch):
submodule, source, module = local_submodule
child = module.create_submodule("nested", "nested", source.working_tree_dir, branch=source.head.reference.name)
with child.module() as nested:
cached_tip = nested.head.commit
nested.head.reset("HEAD~1", index=True, working_tree=True)
child.binsha = nested.head.commit.binsha
module.index.add([child])
previous = module.index.commit("Add nested submodule at initial commit")
child.binsha = cached_tip.binsha
module.index.add([child])
target = module.index.commit("Advance nested submodule")
submodule.binsha = target.binsha
submodule.repo.index.add([submodule])
submodule.repo.index.commit("Record nested submodule update")
module.head.reset(previous, index=True, working_tree=True)
with mock.patch.object(Remote, "fetch", autospec=True, side_effect=Remote.fetch) as fetch:
update_submodule(recursive=True, no_fetch=no_fetch)
assert module.head.commit == target
assert nested.head.commit == cached_tip
assert Path(child.abspath, "file").read_text(encoding="utf-8") == "cached"
assert fetch.call_count == (0 if no_fetch else 2)
assert {call[0][0].repo.git_dir for call in fetch.call_args_list} == (
set() if no_fetch else {module.git_dir, nested.git_dir}
)
@pytest.mark.parametrize("no_fetch", [False, True], ids=["fetch", "no-fetch"])
def test_root_update_no_fetch_on_branch_change(local_submodule, no_fetch):
submodule, source, module = local_submodule
branch_name = source.head.reference.name + "-other"
source.create_head(branch_name)
module.remotes.origin.fetch()
tracking_branch = module.remotes.origin.refs[branch_name]
previous = submodule.repo.head.commit
with submodule.config_writer() as writer:
writer.set_value("branch", branch_name)
submodule.repo.index.commit("Change submodule branch")
module.head.reset("HEAD~1", index=True, working_tree=True)
with mock.patch.object(Remote, "fetch", autospec=True, side_effect=Remote.fetch) as fetch:
RootModule(submodule.repo).update(previous_commit=previous, recursive=False, no_fetch=no_fetch)
assert module.head.reference.name == branch_name
assert module.head.reference.tracking_branch() == tracking_branch
assert module.head.commit.binsha == submodule.binsha
if no_fetch:
fetch.assert_not_called()
else:
assert fetch.called
@pytest.mark.parametrize("no_fetch", [False, True], ids=["fetch", "no-fetch"])
def test_root_update_no_fetch_on_url_change(local_submodule, tmp_path, no_fetch):
submodule, source, module = local_submodule
previous = submodule.repo.head.commit
branch_path = module.head.reference.path
tracking_branch = module.head.reference.tracking_branch()
cached_refs = _cached_remote_refs(module)
module.head.reset("HEAD~1", index=True, working_tree=True)
assert module.head.commit.binsha != submodule.binsha
with source.clone(tmp_path / "mirror") as mirror:
mirror_url = Git.polish_url(mirror.working_tree_dir)
with submodule.config_writer() as writer:
writer.set_value("url", mirror_url)
submodule.repo.index.commit("Change submodule URL")
with mock.patch.object(Remote, "fetch", autospec=True, side_effect=Remote.fetch) as fetch:
RootModule(submodule.repo).update(previous_commit=previous, recursive=False, no_fetch=no_fetch)
if no_fetch:
fetch.assert_not_called()
assert module.head.reference.path == branch_path
assert module.head.reference.tracking_branch() == tracking_branch
assert _cached_remote_refs(module) == cached_refs
else:
assert fetch.call_count == 2
assert {call[0][0].name for call in fetch.call_args_list} == {"origin"}
assert module.remotes.origin.url == mirror_url
assert {remote.name for remote in module.remotes} == {"origin"}
assert module.head.commit.binsha == submodule.binsha
assert Path(submodule.abspath, "file").read_text(encoding="utf-8") == "cached"
@pytest.mark.parametrize("change_branch", [False, True], ids=["same-branch", "branch-change"])
def test_root_update_no_fetch_url_change_uses_cached_tip(local_submodule, tmp_path, change_branch):
submodule, source, module = local_submodule
branch_name = source.head.reference.name
if change_branch:
branch_name += "-other"
source.create_head(branch_name)
module.remotes.origin.fetch()
tracking_branch = module.remotes.origin.refs[branch_name]
cached_tip = tracking_branch.commit
cached_refs = _cached_remote_refs(module)
module.head.reset("HEAD~1", index=True, working_tree=True)
submodule.binsha = module.head.commit.binsha
submodule.repo.index.add([submodule])
previous = submodule.repo.index.commit("Pin submodule to initial commit")
assert submodule.binsha != cached_tip.binsha
with source.clone(tmp_path / "mirror") as mirror:
if change_branch:
mirror.create_head(branch_name).checkout()
remote_tip = _commit_file(mirror, "remote-only")
assert remote_tip != cached_tip
mirror_url = Git.polish_url(mirror.working_tree_dir)
with submodule.config_writer() as writer:
writer.set_value("url", mirror_url)
writer.set_value("branch", branch_name)
submodule.repo.index.commit("Change submodule URL and tracking branch")
with mock.patch.object(Remote, "fetch", side_effect=AssertionError("Unexpected fetch")) as fetch:
RootModule(submodule.repo).update(
previous_commit=previous, recursive=False, no_fetch=True, to_latest_revision=True
)
fetch.assert_not_called()
assert module.remotes.origin.url == mirror_url
assert {remote.name for remote in module.remotes} == {"origin"}
assert _cached_remote_refs(module) == cached_refs
assert module.head.reference.name == branch_name
assert module.head.reference.tracking_branch() == tracking_branch
assert module.head.commit == cached_tip
assert Path(submodule.abspath, "file").read_text(encoding="utf-8") == "cached"
@pytest.mark.parametrize("multiple_remotes", [False, True], ids=["single-remote-fallback", "matching-remote"])
def test_root_update_no_fetch_selects_url_change_remote(local_submodule, tmp_path, multiple_remotes):
submodule, source, module = local_submodule
previous = submodule.repo.head.commit
original_url = module.remotes.origin.url
module.remotes.origin.set_url(Git.polish_url(str(tmp_path / "unrelated")))
if multiple_remotes:
upstream = module.create_remote("upstream", original_url)
upstream.fetch()
module.head.reference.set_tracking_branch(upstream.refs[submodule.branch_name])
else:
module.remotes.origin.rename("upstream")
tracking_branch = module.head.reference.tracking_branch()
cached_refs = _cached_remote_refs(module)
module.head.reset("HEAD~1", index=True, working_tree=True)
assert module.head.commit.binsha != submodule.binsha
with source.clone(tmp_path / "mirror") as mirror:
mirror_url = Git.polish_url(mirror.working_tree_dir)
expected_urls = {remote.name: remote.url for remote in module.remotes}
expected_urls["upstream"] = mirror_url
with submodule.config_writer() as writer:
writer.set_value("url", mirror_url)
submodule.repo.index.commit("Change submodule URL")
with mock.patch.object(Remote, "fetch", side_effect=AssertionError("Unexpected fetch")) as fetch:
RootModule(submodule.repo).update(previous_commit=previous, recursive=False, no_fetch=True)
fetch.assert_not_called()
assert {remote.name: remote.url for remote in module.remotes} == expected_urls
assert _cached_remote_refs(module) == cached_refs
assert module.head.reference.tracking_branch() == tracking_branch
assert module.head.commit.binsha == submodule.binsha
assert Path(submodule.abspath, "file").read_text(encoding="utf-8") == "cached"