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#!/usr/bin/env python
#
# Copyright 2014 The LibYuv 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 libyuv. It contains selected parts of the
# main function from the src/build/gyp_chromium file.

import glob
import os
import shlex
import sys

checkout_root = os.path.dirname(os.path.realpath(__file__))

sys.path.insert(0, os.path.join(checkout_root, 'build'))
import gyp_chromium
import gyp_helper
import vs_toolchain

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

def GetSupplementalFiles():
  """Returns a list of the supplemental files that are included in all GYP
  sources."""
  # Can't use the one in gyp_chromium since the directory location of the root
  # is different.
  return glob.glob(os.path.join(checkout_root, '*', 'supplement.gypi'))


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

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

  # 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:
    # Because of a bug in gyp, simply adding the abspath to all.gyp doesn't
    # work, but chdir'ing and adding the relative path does. Spooky :/
    os.chdir(checkout_root)
    args.append('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'

  vs2013_runtime_dll_dirs = None
  if int(os.environ.get('DEPOT_TOOLS_WIN_TOOLCHAIN', '1')):
    vs2013_runtime_dll_dirs = vs_toolchain.SetEnvironmentAndGetRuntimeDllDirs()

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

  supplemental_includes = gyp_chromium.GetSupplementalFiles()
  gyp_vars_dict = gyp_chromium.GetGypVars(supplemental_includes)

  # Automatically turn on crosscompile support for platforms that need it.
  if all(('ninja' in os.environ.get('GYP_GENERATORS', ''),
          gyp_vars_dict.get('OS') in ['android', 'ios'],
          'GYP_CROSSCOMPILE' not in os.environ)):
    os.environ['GYP_CROSSCOMPILE'] = '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...
  gyp_rc = gyp.main(args)

  if vs2013_runtime_dll_dirs:
    x64_runtime, x86_runtime = vs2013_runtime_dll_dirs
    vs_toolchain.CopyVsRuntimeDlls(
        os.path.join(checkout_root, gyp_chromium.GetOutputDirectory()),
        (x86_runtime, x64_runtime))

  sys.exit(gyp_rc)