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# gemato: Top-level Manifest finding tests
# vim:fileencoding=utf-8
# (c) 2017-2020 Michał Górny
# Licensed under the terms of 2-clause BSD license
import gzip
import os
import os.path
import pytest
from gemato.find_top_level import find_top_level_manifest
from tests.testutil import disallow_writes
@pytest.fixture(scope='module')
def plain_tree(tmp_path_factory):
tmp_path = tmp_path_factory.mktemp('find-top-level-plain-')
for d in ('empty-subdir',
'manifest-subdir',
'deep/manifest-subdir',
'ignored-dir',
'ignored-dir/subdir',
'ignored-dir-not',
'ignored-empty-dir'):
os.makedirs(tmp_path / d)
with open(tmp_path / 'Manifest', 'w') as f:
f.write('''
IGNORE ignored-dir
IGNORE ignored-empty-dir
''')
for f in ('manifest-subdir/Manifest',
'deep/manifest-subdir/Manifest',
'ignored-dir/Manifest'):
with open(tmp_path / f, 'w'):
pass
disallow_writes(tmp_path)
yield tmp_path
@pytest.mark.parametrize(
'start_dir,expected',
[('.', 'Manifest'),
('empty-subdir', 'Manifest'),
('manifest-subdir', 'Manifest'),
('deep/manifest-subdir', 'Manifest'),
('ignored-dir', 'ignored-dir/Manifest'),
('ignored-dir/subdir', 'ignored-dir/Manifest'),
('ignored-dir-not', 'Manifest'),
('ignored-empty-dir', None),
])
def test_find_top_level_manifest(plain_tree, start_dir, expected):
"""Test finding top-level Manifest from plain directory tree"""
mpath = find_top_level_manifest(plain_tree / start_dir)
if mpath is not None:
mpath = os.path.relpath(mpath, plain_tree)
assert mpath == expected
def test_unreadable_manifest(tmp_path):
"""Test failure when one of Manifest files is not readable"""
with open(tmp_path / 'Manifest', 'w') as f:
os.fchmod(f.fileno(), 0)
with pytest.raises(PermissionError):
find_top_level_manifest(tmp_path)
def test_empty_tree(tmp_path):
"""Test working on empty tree without a Manifest file"""
assert find_top_level_manifest(tmp_path) is None
def test_root_directory(tmp_path):
"""Test that things do not explode when running on /"""
if os.path.exists('/Manifest'):
pytest.skip('Manifest is present in system root ("/")')
assert find_top_level_manifest('/') is None
def test_cross_device(tmp_path):
"""Test that device boundaries are not crossed"""
if not os.path.ismount('/proc'):
pytest.skip('/proc is not a mount point')
with open(tmp_path / 'Manifest', 'w'):
pass
os.symlink('/proc', tmp_path / 'test')
assert find_top_level_manifest(tmp_path / 'test') is None
@pytest.fixture(scope='module')
def compressed_manifest_tree(tmp_path_factory):
tmp_path = tmp_path_factory.mktemp('find-top-level-compressed-')
for d in ('empty-subdir',
'manifest-subdir',
'deep/manifest-subdir',
'ignored-dir',
'ignored-dir/subdir',
'ignored-dir-not',
'ignored-empty-dir'):
os.makedirs(tmp_path / d)
with gzip.GzipFile(tmp_path / 'Manifest.gz', 'wb') as f:
f.write(b'''
IGNORE ignored-dir
IGNORE ignored-empty-dir
''')
with open(tmp_path / 'manifest-subdir/Manifest', 'wb'):
pass
for f in ('deep/manifest-subdir/Manifest.gz',
'ignored-dir/Manifest.gz'):
with gzip.GzipFile(tmp_path / f, 'w'):
pass
disallow_writes(tmp_path)
yield tmp_path
@pytest.mark.parametrize(
'start_dir,allow_compressed,expected',
[('.', False, None),
('.', True, 'Manifest.gz'),
('empty-subdir', True, 'Manifest.gz'),
('manifest-subdir', True, 'Manifest.gz'),
('deep/manifest-subdir', True, 'Manifest.gz'),
('ignored-dir', True, 'ignored-dir/Manifest.gz'),
('ignored-dir/subdir', True, 'ignored-dir/Manifest.gz'),
('ignored-dir-not', True, 'Manifest.gz'),
('ignored-empty-dir', True, None),
])
def test_find_compressed_top_level_manifest(compressed_manifest_tree,
start_dir,
allow_compressed,
expected):
"""Test finding compressed top-level Manifest """
mpath = find_top_level_manifest(compressed_manifest_tree / start_dir,
allow_compressed=allow_compressed)
if mpath is not None:
mpath = os.path.relpath(mpath, compressed_manifest_tree)
assert mpath == expected
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