#!/usr/bin/env python
#
# Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
#
# Use of this source code is governed by a BSD-style license
# that can be found in the LICENSE file in the root of the source
# tree. An additional intellectual property rights grant can be found
# in the file PATENTS.  All contributing project authors may
# be found in the AUTHORS file in the root of the source tree.

# This script is used to run GYP for WebRTC. It contains selected parts of the
# main function from the src/build/gyp_chromium file.

import glob
import os
import shlex
import sys

script_dir = os.path.dirname(os.path.realpath(__file__))
checkout_root = os.path.abspath(os.path.join(script_dir, os.pardir, os.pardir))
chrome_build_dir = os.path.join(checkout_root, 'build')

sys.path.insert(0, chrome_build_dir)
import gyp_chromium
import gyp_helper

sys.path.insert(0, os.path.join(checkout_root, 'tools', 'gyp', 'pylib'))
import gyp


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

  if int(os.environ.get('GYP_CHROMIUM_NO_ACTION', 0)):
    print 'Skipping gyp_webrtc due to GYP_CHROMIUM_NO_ACTION env var.'
    sys.exit(0)

  if 'SKIP_WEBRTC_GYP_ENV' not in os.environ:
    # Update the environment based on webrtc.gyp_env
    gyp_env_path = os.path.join(os.path.dirname(checkout_root),
                                'webrtc.gyp_env')
    gyp_helper.apply_gyp_environment_from_file(gyp_env_path)

  # This could give false positives since it doesn't actually do real option
  # parsing.  Oh well.
  gyp_file_specified = False
  for arg in args:
    if arg.endswith('.gyp'):
      gyp_file_specified = True
      break

  # If we didn't get a file, assume 'all.gyp' in the root of the checkout.
  if not gyp_file_specified:
    args.append(os.path.join(checkout_root, 'all.gyp'))

  # There shouldn't be a circular dependency relationship between .gyp files,
  args.append('--no-circular-check')

  # Default to ninja unless GYP_GENERATORS is set.
  if not os.environ.get('GYP_GENERATORS'):
    os.environ['GYP_GENERATORS'] = 'ninja'

  # Enforce gyp syntax checking. This adds about 20% execution time.
  args.append('--check')

  supplemental_includes = gyp_chromium.GetSupplementalFiles()
  if not gyp_chromium.RunGN(supplemental_includes):
    sys.exit(1)
  args.extend(['-I' + i for i in
               gyp_chromium.additional_include_files(supplemental_includes,
                                                     args)])

  # Set the gyp depth variable to the root of the checkout.
  args.append('--depth=' + os.path.relpath(checkout_root))

  print 'Updating projects from gyp files...'
  sys.stdout.flush()

  # Off we go...
  sys.exit(gyp.main(args))