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from __future__ import annotations

import os

import subprocess

import pytest

from pre_commit_hooks.destroyed_symlinks import find_destroyed_symlinks

from pre_commit_hooks.destroyed_symlinks import main

from testing.util import git_commit

TEST_SYMLINK = 'test_symlink'

TEST_SYMLINK_TARGET = '/doesnt/really/matters'

TEST_FILE = 'test_file'

TEST_FILE_RENAMED = f'{TEST_FILE}_renamed'

@pytest.fixture

def repo_with_destroyed_symlink(tmpdir):

source_repo = tmpdir.join('src')

os.makedirs(source_repo, exist_ok=True)

test_repo = tmpdir.join('test')

with source_repo.as_cwd():

subprocess.check_call(('git', 'init'))

os.symlink(TEST_SYMLINK_TARGET, TEST_SYMLINK)

with open(TEST_FILE, 'w') as f:

print('some random content', file=f)

subprocess.check_call(('git', 'add', '.'))

git_commit('-m', 'initial')

assert b'120000 ' in subprocess.check_output(

('git', 'cat-file', '-p', 'HEAD^{tree}'),

)

subprocess.check_call(

('git', '-c', 'core.symlinks=false', 'clone', source_repo, test_repo),

)

with test_repo.as_cwd():

subprocess.check_call(

('git', 'config', '--local', 'core.symlinks', 'true'),

)

subprocess.check_call(('git', 'mv', TEST_FILE, TEST_FILE_RENAMED))

assert not os.path.islink(test_repo.join(TEST_SYMLINK))

yield test_repo

def test_find_destroyed_symlinks(repo_with_destroyed_symlink):

with repo_with_destroyed_symlink.as_cwd():

assert find_destroyed_symlinks([]) == []

assert main([]) == 0

subprocess.check_call(('git', 'add', TEST_SYMLINK))

assert find_destroyed_symlinks([TEST_SYMLINK]) == [TEST_SYMLINK]

assert find_destroyed_symlinks([]) == []

assert main([]) == 0

assert find_destroyed_symlinks([TEST_FILE_RENAMED, TEST_FILE]) == []

ALL_STAGED = [TEST_SYMLINK, TEST_FILE_RENAMED]

assert find_destroyed_symlinks(ALL_STAGED) == [TEST_SYMLINK]

assert main(ALL_STAGED) != 0

with open(TEST_SYMLINK, 'a') as f:

print(file=f) # add trailing newline

subprocess.check_call(['git', 'add', TEST_SYMLINK])

assert find_destroyed_symlinks(ALL_STAGED) == [TEST_SYMLINK]

assert main(ALL_STAGED) != 0

with open(TEST_SYMLINK, 'w') as f:

print('0' * len(TEST_SYMLINK_TARGET), file=f)

subprocess.check_call(('git', 'add', TEST_SYMLINK))

assert find_destroyed_symlinks(ALL_STAGED) == []

assert main(ALL_STAGED) == 0

with open(TEST_SYMLINK, 'w') as f:

print('0' * (len(TEST_SYMLINK_TARGET) + 3), file=f)

subprocess.check_call(('git', 'add', TEST_SYMLINK))

assert find_destroyed_symlinks(ALL_STAGED) == []

assert main(ALL_STAGED) == 0

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