precommit_hooks/gcheckstyle_wrapper.py

#!/usr/bin/env python3
# Copyright 2020 The Cobalt Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""See if internal tool gcheckstyle is available."""

import subprocess
import sys

try:
  from internal.internal_tools_paths import checkstyle_path
except ImportError:
  checkstyle_path = None

if __name__ == '__main__':
  gcheckstyle_args = sys.argv[1:]

  if not checkstyle_path:
    print('Checkstyle not available, skipping.')
    sys.exit(0)

  try:
    sys.exit(subprocess.call([checkstyle_path] + gcheckstyle_args))
  except FileNotFoundError:
    print('Checkstyle not found, skipping.')
    sys.exit(0)
  except OSError as e:
    print('You may need to run gcert.')
    raise e