[githook][python]phpのシンタックスチェック

check_php_error.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys
import os
import subprocess


def get_index_files(extensions=[]):
    """gitリポジトリ path の INDEX に追加されているファイル名一覧を返す

    Keyword arguments:
    extensions -- フィルタする拡張子
    """
    against = 'HEAD'

    try:
        subprocess.check_output(['git', 'rev-parse', '--verify', 'HEAD'],
                                stderr=subprocess.STDOUT)
    except subprocess.CalledProcessError, e:
        against = '4b825dc642cb6eb9a060e54bf8d69288fbee4904'

    try:
        output = subprocess.check_output(
            ['git', 'diff-index', '--cached', '--name-only', against])
    except subprocess.CalledProcessError, e:
        print '# unexpected error occurred'
        print e
        return []

    file_paths = []
    for file_path in output.split('\n'):
        if not file_path:
            break

        path, ext = os.path.splitext(file_path)

        if ext in extensions and os.path.exists(file_path):
            file_paths.append(file_path)

    return file_paths


def is_valid_php(file_path):
    """php -l を実行して結果を返す

    Keyword arguments:
    file_paths -- チェック対象のファイル
    """
    try:
        subprocess.check_output(['php', '-l', file_path])
        return True
    except subprocess.CalledProcessError, e:
        return False


def main():
    return_code = 0

    file_paths = get_index_files(extensions=['.php'])

    error_files = []
    for file_path in file_paths:
        if not is_valid_php(file_path):
            return_code = 1
            error_files.append(file_path)

    for file_path in error_files:
        print '# error occurred : %s' % file_path

    sys.exit(return_code)

if __name__ == '__main__':
    main()