#!/usr/bin/env python
# Copyright (C) 2009 Google Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions and the following disclaimer.
#   * Redistributions in binary form must reproduce the above copyright
#     notice, this list of conditions and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#   * Neither the name of Google Inc. nor the names of its contributors
#     may be used to endorse or promote products derived from this software
#     without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

# This file is used by gclient execute gyp with the proper command
# line arguments.

import glob
import os
import shlex
import subprocess
import sys

script_dir = os.path.dirname(__file__)
chrome_src = os.path.abspath(script_dir)

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

# Add tools/grit so that pymod_do_main(grit_info ...) can find grit_info.py.
sys.path.insert(1, os.path.join(chrome_src, 'tools', 'grit'))

def additional_include_files(args=[]):
  """
  Returns a list of additional (.gypi) files to include, without
  duplicating ones that are already specified on the command line.
  """
  # Determine the include files specified on the command line.
  # This doesn't cover all the different option formats you can use,
  # but it's mainly intended to avoid duplicating flags on the automatic
  # makefile regeneration which only uses this format.
  specified_includes = set()
  for arg in args:
    if arg.startswith('-I') and len(arg) > 2:
      specified_includes.add(os.path.realpath(arg[2:]))

  result = []
  def AddInclude(path):
    if os.path.realpath(path) not in specified_includes:
      result.append(path)

  # Always include common.gypi
  AddInclude(os.path.join(script_dir, 'build', 'common.gypi'))

  # Optionally add supplemental .gypi files if present.
  supplements = glob.glob(os.path.join(script_dir, '*', 'supplement.gypi'))
  for supplement in supplements:
    AddInclude(supplement)

  return result

if __name__ == '__main__':

  args = sys.argv[1:]

  # When building the WebKit Chromium port for Android, we have to cross-compile
  # the source to ARM, check for the right Android NDK and set the appropriate
  # GYP flags. Chromium's envsetup.sh script will handle these steps, but as it
  # exports variables and commands we have to re-call ourselves afterwards.
  if 'WEBKIT_ANDROID_BUILD' in os.environ:
    if not '--no-envsetup-recursion' in args:
      envsetup_location = os.path.join(chrome_src, 'build', 'android', 'envsetup.sh')
      exit(subprocess.call(['bash', '-c', 'source %s && python gyp_webkit --no-envsetup-recursion %s' % (envsetup_location, ' '.join(args))]))
    else:
      args.remove('--no-envsetup-recursion')

  # Add includes.
  args.extend(['-I' + i for i in additional_include_files(args)])

  # There shouldn't be a circular dependency relationship between .gyp files,
  # but in Chromium's .gyp files, on non-Mac platforms, circular relationships
  # currently exist.  The check for circular dependencies is currently
  # bypassed on other platforms, but is left enabled on the Mac, where a
  # violation of the rule causes Xcode to misbehave badly.
  # http://crbug.com/35878.
  if sys.platform not in ('darwin',):
    args.append('--no-circular-check')

  generators = os.environ.get('GYP_GENERATORS', '')
  if 'ninja' in generators:
    args.extend([ '--toplevel-dir=../../..' ])
  elif (sys.platform.startswith('linux') or
      'WEBKIT_ANDROID_BUILD' in os.environ or
      (sys.platform == 'darwin' and 'make' in generators)):
    args.extend(['-fmake',
                 '--suffix=.chromium',
                 '--toplevel-dir=../../..',
                 # auto_regeneration doesn't work with toplevel-dir
                 '-Gauto_regeneration=0'])

  # Other command args:
  args.extend([
               # gyp variable defines.
               '-Dinside_chromium_build=0',
               '-Dv8_use_snapshot=false',
               '-Dmsvs_use_common_release=0',
               '-Gmsvs_error_on_missing_sources=1',

               # WebKit doesn't use the chromium style checker.
               '-Dmake_clang_dir=Source/WebKit/chromium/third_party/llvm-build/Release+Asserts',
               '-Dclang_use_chrome_plugins=0',

               # gyp hack: otherwise gyp assumes its in chromium's src/ dir.
               '--depth=./',

               # gyp file to execute.
               'All.gyp'])

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

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