Remove Windows-related GN build configuration

build/toolchain/win/setup_toolchain.py

-# Copyright (c) 2013 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.
-#
-# Copies the given "win tool" (which the toolchain uses to wrap compiler
-# invocations) and the environment blocks for the 32-bit and 64-bit builds on
-# Windows to the build directory.
-#
-# The arguments are the visual studio install location and the location of the
-# win tool. The script assumes that the root build directory is the current dir
-# and the files will be written to the current directory.
-
-import errno
-import os
-import re
-import subprocess
-import sys
-
-
-def _ExtractImportantEnvironment(output_of_set):
-  """Extracts environment variables required for the toolchain to run from
-  a textual dump output by the cmd.exe 'set' command."""
-  envvars_to_save = (
-      'goma_.*', # TODO(scottmg): This is ugly, but needed for goma.
-      'include',
-      'lib',
-      'libpath',
-      'path',
-      'pathext',
-      'systemroot',
-      'temp',
-      'tmp',
-      )
-  env = {}
-  for line in output_of_set.splitlines():
-    for envvar in envvars_to_save:
-      if re.match(envvar + '=', line.lower()):
-        var, setting = line.split('=', 1)
-        if envvar == 'path':
-          # Our own rules (for running gyp-win-tool) and other actions in
-          # Chromium rely on python being in the path. Add the path to this
-          # python here so that if it's not in the path when ninja is run
-          # later, python will still be found.
-          setting = os.path.dirname(sys.executable) + os.pathsep + setting
-        env[var.upper()] = setting
-        break
-  for required in ('SYSTEMROOT', 'TEMP', 'TMP'):
-    if required not in env:
-      raise Exception('Environment variable "%s" '
-                      'required to be set to valid path' % required)
-  return env
-
-
-def _SetupScript(target_cpu, sdk_dir):
-  """Returns a command (with arguments) to be used to set up the
-  environment."""
-  # Check if we are running in the SDK command line environment and use
-  # the setup script from the SDK if so. |target_cpu| should be either
-  # 'x86' or 'x64'.
-  assert target_cpu in ('x86', 'x64')
-  if bool(int(os.environ.get('DEPOT_TOOLS_WIN_TOOLCHAIN', 1))) and sdk_dir:
-    return [os.path.normpath(os.path.join(sdk_dir, 'Bin/SetEnv.Cmd')),
-            '/' + target_cpu]
-  else:
-    # We only support x64-hosted tools.
-    # TODO(scottmg|dpranke): Non-depot_tools toolchain: need to get Visual
-    # Studio install location from registry.
-    return [os.path.normpath(os.path.join(os.environ['GYP_MSVS_OVERRIDE_PATH'],
-                                          'VC/vcvarsall.bat')),
-            'amd64_x86' if target_cpu == 'x86' else 'amd64']
-
-
-def _FormatAsEnvironmentBlock(envvar_dict):
-  """Format as an 'environment block' directly suitable for CreateProcess.
-  Briefly this is a list of key=value\0, terminated by an additional \0. See
-  CreateProcess documentation for more details."""
-  block = ''
-  nul = '\0'
-  for key, value in envvar_dict.iteritems():
-    block += key + '=' + value + nul
-  block += nul
-  return block
-
-
-def _CopyTool(source_path):
-  """Copies the given tool to the current directory, including a warning not
-  to edit it."""
-  with open(source_path) as source_file:
-    tool_source = source_file.readlines()
-
-  # Add header and write it out to the current directory (which should be the
-  # root build dir).
-  with open("gyp-win-tool", 'w') as tool_file:
-    tool_file.write(''.join([tool_source[0],
-                             '# Generated by setup_toolchain.py do not edit.\n']
-                            + tool_source[1:]))
-
-
-def main():
-  if len(sys.argv) != 6:
-    print('Usage setup_toolchain.py '
-          '<visual studio path> <win tool path> <win sdk path> '
-          '<runtime dirs> <target_cpu>')
-    sys.exit(2)
-  tool_source = sys.argv[2]
-  win_sdk_path = sys.argv[3]
-  runtime_dirs = sys.argv[4]
-  target_cpu = sys.argv[5]
-
-  _CopyTool(tool_source)
-
-  cpus = ('x86', 'x64')
-  assert target_cpu in cpus
-  vc_bin_dir = ''
-
-  # TODO(scottmg|goma): Do we need an equivalent of
-  # ninja_use_custom_environment_files?
-
-  for cpu in cpus:
-    # Extract environment variables for subprocesses.
-    args = _SetupScript(cpu, win_sdk_path)
-    args.extend(('&&', 'set'))
-    popen = subprocess.Popen(
-        args, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
-    variables, _ = popen.communicate()
-    env = _ExtractImportantEnvironment(variables)
-    env['PATH'] = runtime_dirs + ';' + env['PATH']
-
-    if cpu == target_cpu:
-      for path in env['PATH'].split(os.pathsep):
-        if os.path.exists(os.path.join(path, 'cl.exe')):
-          vc_bin_dir = os.path.realpath(path)
-          break
-
-    # The Windows SDK include directories must be first. They both have a sal.h,
-    # and the SDK one is newer and the SDK uses some newer features from it not
-    # present in the Visual Studio one.
-
-    if win_sdk_path:
-      additional_includes = ('{sdk_dir}\\Include\\shared;' +
-                             '{sdk_dir}\\Include\\um;' +
-                             '{sdk_dir}\\Include\\winrt;').format(
-                                  sdk_dir=win_sdk_path)
-      env['INCLUDE'] = additional_includes + env['INCLUDE']
-    env_block = _FormatAsEnvironmentBlock(env)
-    with open('environment.' + cpu, 'wb') as f:
-      f.write(env_block)
-
-  assert vc_bin_dir
-  print 'vc_bin_dir = "%s"' % vc_bin_dir
-
-
-if __name__ == '__main__':
-  main()