Source code for spack.test.util.spack_lock_wrapper

# Copyright 2013-2022 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


[docs]def test_disable_locking(tmpdir): """Ensure that locks do no real locking when disabled.""" lock_path = str(tmpdir.join("lockfile")) old_value = spack.config.get("config:locks") with spack.config.override("config:locks", False): lock = lk.Lock(lock_path) 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) assert old_value == spack.config.get("config:locks")
# "Disable" mock_stage fixture to avoid subdir permissions issues on cleanup.
[docs]@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.
[docs]@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)