#!/usr/bin/env python
# Copyright 2018 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""A tool to facilitate validating the cobalt configuration."""

import argparse
import os
import os.path
import subprocess
import sys

THIS_DIR = os.path.abspath(os.path.dirname(__file__))
COBALT_REPO = 'https://fuchsia.googlesource.com/cobalt'

def get_cobalt_dir(args):
  # If a cobalt_checkout has been specified, we assume the user is managing that
  # checkout and so we leave it in the state we find it.
  if args.cobalt_checkout:
    return args.cobalt_checkout

  # We checkout cobalt in a subdirectory called 'cobalt'.
  cobalt_dir = os.path.join(THIS_DIR, 'cobalt')
  # If the 'cobalt' subdirectory exists, we just update it.
  if os.path.isdir(cobalt_dir):
    savedDir = os.getcwd()
    try:
      os.chdir(cobalt_dir)
      subprocess.check_call(['git', 'pull', 'origin', 'master'])
    finally:
      os.chdir(savedDir)
    return cobalt_dir

  # If the 'cobalt' subdirectory did not exist, we clone it.
  subprocess.check_call(['git', 'clone', COBALT_REPO, cobalt_dir])
  return cobalt_dir

def main():
  parser = argparse.ArgumentParser(description='%s will check the cobalt '
                                               'config in this directory. The '
                                               'first run of this tool could '
                                               'take a long time.')
  parser.add_argument('--cobalt_checkout', 
      help='The location of a pre-existing cobalt checkout. If this is not '
           'set, a new cobalt checkout will be created in %s/cobalt (or '
           'updated if it already exists) and used to build the config_parser.'
           % THIS_DIR,
      default=None)
  args = parser.parse_args()

  cobalt_dir = get_cobalt_dir(args)
  savedDir = os.getcwd()

  try:
    os.chdir(cobalt_dir)
    subprocess.check_call(['./cobaltb.py', 'setup'])
    subprocess.check_call(['./cobaltb.py', 'build'])
    subprocess.check_call(['./cobaltb.py', 'check_config', '--config_dir',
      THIS_DIR])
  finally:
    os.chdir(savedDir)

  return 0

if __name__ == '__main__':
  sys.exit(main())