# Copyright (c) 2011 The Chromium Embedded Framework Authors.
# Portions copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

from __future__ import absolute_import
from __future__ import print_function
from file_util import make_dir, write_file
from gclient_util import *
from gn_args import GetAllPlatformConfigs, GetConfigFileContents
import issue_1999
import os
import sys

# The CEF directory is the parent directory of _this_ script.
cef_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir))
# The src directory is the parent directory of the CEF directory.
src_dir = os.path.abspath(os.path.join(cef_dir, os.pardir))

# Determine the platform.
if sys.platform == 'win32':
  platform = 'windows'
elif sys.platform == 'darwin':
  platform = 'mac'
elif sys.platform.startswith('linux'):
  platform = 'linux'
else:
  print('Unknown operating system platform')
  sys.exit()

print("\nGenerating CEF version header file...")
cmd = [sys.executable, 'tools/make_version_header.py', 'include/cef_version.h']
RunAction(cef_dir, cmd)

print("\nPatching build configuration and source files for CEF...")
cmd = [sys.executable, 'tools/patcher.py']
RunAction(cef_dir, cmd)

if platform == 'linux' and 'CEF_INSTALL_SYSROOT' in os.environ:
  for arch in os.environ['CEF_INSTALL_SYSROOT'].split(','):
    if len(arch) == 0:
      continue
    print("\nInstalling %s sysroot environment..." % arch)
    cmd = [
        sys.executable, 'build/linux/sysroot_scripts/install-sysroot.py',
        '--arch', arch
    ]
    RunAction(src_dir, cmd)

print("\nGenerating CEF project files...")

gn_args = {}

if platform == 'windows':
  # Force use of the locally installed version of Visual Studio.
  if not 'DEPOT_TOOLS_WIN_TOOLCHAIN' in os.environ:
    os.environ['DEPOT_TOOLS_WIN_TOOLCHAIN'] = '0'

  # By default GN+Ninja on Windows expects Visual Studio and Windows SDK to be
  # installed on the local machine. To build when Visual Studio and/or SDK is
  # extracted to a directory but not installed (e.g. via a custom toolchain) set
  # the following environment variables:
  #
  # o Enable use of a custom toolchain on Windows.
  #
  #   set WIN_CUSTOM_TOOLCHAIN=1
  #
  # o Used by tools/msvs_env.bat to configure the MSVS tools environment.
  #   Should be set to "none" because VC variables for CEF will be set via
  #   INCLUDE/LIB/PATH.
  #
  #   set CEF_VCVARS=none
  #
  # o Used by the following scripts:
  #   (a) build/vs_toolchain.py SetEnvironmentAndGetRuntimeDllDirs when
  #   determining whether to copy VS runtime binaries to the output directory.
  #   If GYP_MSVS_OVERRIDE_PATH exists then binaries will not be copied and
  #   should instead be discoverable via the PATH env variable.
  #   (b) build/toolchain/win/setup_toolchain.py _LoadToolchainEnv when
  #   writing environment.* files that specify INCLUDE/LIB/PATH values. If
  #   vcvarsall.bat [1] exists then environment variables will be derived from
  #   there and the specified INCLUDE/LIB values will be ignored by Chromium
  #   (PATH is retained because it might contain required VS runtime libraries).
  #   If this file does not exist then the INCLUDE/LIB/PATH values are also
  #   required by Chromium.
  #   TODO(cef): Rename to VS_ROOT and VS_VERSION after Chromium cleans up GYP
  #   dependencies.
  #
  #   set GYP_MSVS_OVERRIDE_PATH=<VS root directory>
  #   set GYP_MSVS_VERSION=<VS version>
  #
  # o Used to configure GN arguments in this script.
  #
  #   set VS_CRT_ROOT=<VS CRT root directory>
  #   set SDK_ROOT=<Platform SDK root directory>
  #   set SDK_VERSION=<Platform SDK version>
  #
  # o Used by various scripts as described above. These values are optional when
  #   vcvarsall.bat [1] exists.
  #
  #   set INCLUDE=<VS include paths>
  #   set LIB=<VS library paths>
  #   set PATH=<VS executable paths>
  #
  # See tools/depot_tools/win_toolchain/package_from_installed.py for an example
  # packaging script along with required directory contents and INCLUDE/LIB/PATH
  # values.
  #
  # [1] The vcvarsall.bat script must exist in "%GYP_MSVS_OVERRIDE_PATH%\VC\" or
  #     "%GYP_MSVS_OVERRIDE_PATH%\VC\Auxiliary\Build\". If the Windows SDK is not
  #     installed (e.g. not discoverable via the Windows registry) then
  #     "%GYP_MSVS_OVERRIDE_PATH%\Common7\Tools\vsdevcmd\core\winsdk.bat" must be
  #     patched to support discovery via SDK_ROOT as described in
  #     https://bitbucket.org/chromiumembedded/cef/issues/2773#comment-59687474.
  #
  if bool(int(os.environ.get('WIN_CUSTOM_TOOLCHAIN', '0'))):
    required_vars = [
        'CEF_VCVARS',
        'GYP_MSVS_OVERRIDE_PATH',
        'GYP_MSVS_VERSION',
        'VS_CRT_ROOT',
        'SDK_ROOT',
        'SDK_VERSION',
    ]
    for var in required_vars:
      if not var in os.environ.keys():
        raise Exception('%s environment variable must be set' % var)

    # Windows custom toolchain requirements. See comments in gn_args.py.
    gn_args['visual_studio_path'] = os.environ['GYP_MSVS_OVERRIDE_PATH']
    gn_args['visual_studio_version'] = os.environ['GYP_MSVS_VERSION']
    gn_args['visual_studio_runtime_dirs'] = os.environ['VS_CRT_ROOT']
    gn_args['windows_sdk_path'] = os.environ['SDK_ROOT']
    gn_args['windows_sdk_version'] = os.environ['SDK_VERSION']

configs = GetAllPlatformConfigs(gn_args)
for dir, config in configs.items():
  # Create out directories and write the args.gn file.
  out_path = os.path.join(src_dir, 'out', dir)
  make_dir(out_path, False)
  args_gn_path = os.path.join(out_path, 'args.gn')
  args_gn_contents = GetConfigFileContents(config)
  write_file(args_gn_path, args_gn_contents)

  # Generate the Ninja config.
  cmd = ['gn', 'gen', os.path.join('out', dir)]
  if 'GN_ARGUMENTS' in os.environ.keys():
    cmd.extend(os.environ['GN_ARGUMENTS'].split(' '))
  RunAction(src_dir, cmd)
  if platform == 'windows':
    issue_1999.apply(out_path)