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# Copyright 2013-2024 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)
"""Tests for Spack's wrapper module around llnl.util.lock."""
import os
import pytest
from llnl.util.filesystem import getuid, group_ids
import spack.config
import spack.util.lock as lk
def test_disable_locking(tmpdir):
"""Ensure that locks do no real locking when disabled."""
lock_path = str(tmpdir.join("lockfile"))
lock = lk.Lock(lock_path, enable=False)
lock.acquire_read()
assert not os.path.exists(lock_path)
lock.acquire_write()
assert not os.path.exists(lock_path)
lock.release_write()
assert not os.path.exists(lock_path)
lock.release_read()
assert not os.path.exists(lock_path)
# "Disable" mock_stage fixture to avoid subdir permissions issues on cleanup.
@pytest.mark.nomockstage
def test_lock_checks_user(tmpdir):
"""Ensure lock checks work with a self-owned, self-group repo."""
uid = getuid()
if uid not in group_ids():
pytest.skip("user has no group with gid == uid")
# self-owned, own group
tmpdir.chown(uid, uid)
# safe
path = str(tmpdir)
tmpdir.chmod(0o744)
lk.check_lock_safety(path)
# safe
tmpdir.chmod(0o774)
lk.check_lock_safety(path)
# unsafe
tmpdir.chmod(0o777)
with pytest.raises(spack.error.SpackError):
lk.check_lock_safety(path)
# safe
tmpdir.chmod(0o474)
lk.check_lock_safety(path)
# safe
tmpdir.chmod(0o477)
lk.check_lock_safety(path)
# "Disable" mock_stage fixture to avoid subdir permissions issues on cleanup.
@pytest.mark.nomockstage
def test_lock_checks_group(tmpdir):
"""Ensure lock checks work with a self-owned, non-self-group repo."""
uid = getuid()
gid = next((g for g in group_ids() if g != uid), None)
if not gid:
pytest.skip("user has no group with gid != uid")
# self-owned, another group
tmpdir.chown(uid, gid)
# safe
path = str(tmpdir)
tmpdir.chmod(0o744)
lk.check_lock_safety(path)
# unsafe
tmpdir.chmod(0o774)
with pytest.raises(spack.error.SpackError):
lk.check_lock_safety(path)
# unsafe
tmpdir.chmod(0o777)
with pytest.raises(spack.error.SpackError):
lk.check_lock_safety(path)
# safe
tmpdir.chmod(0o474)
lk.check_lock_safety(path)
# safe
tmpdir.chmod(0o477)
lk.check_lock_safety(path)
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