Use utilities from build directory instead of own copies

GYP and GN builds share some common utilities. GYP has three utilities
in its own directory which are also synced in build directory now.
We will use utilities from build directory instead of keeping our own
copies.

Compared to our own copies, utilities in build directory
are either same or newer.
find_depot_tools.py is identical;
vs_toolchain.py and find_sdk.py have some minor updates.

Review-Url: https://codereview.chromium.org/1933843002

7 files changed, 4 insertions, 534 deletions

diff --git a/.gitignore b/.gitignore
index ccdfb546f4..2ecaf97ecd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,4 @@
 /build
-/build_gyp/win_toolchain.json
 /buildtools
 /out
 /testing/corpus
diff --git a/DEPS b/DEPS
index 1a08ef31eb..0368c39080 100644
--- a/DEPS
+++ b/DEPS
@@ -173,6 +173,6 @@ hooks = [
     # Update the Windows toolchain if necessary.
     'name': 'win_toolchain',
     'pattern': '.',
-    'action': ['python', 'pdfium/build_gyp/vs_toolchain.py', 'update'],
+    'action': ['python', 'pdfium/build/vs_toolchain.py', 'update'],
   },
 ]
diff --git a/build_gyp/find_depot_tools.py b/build_gyp/find_depot_tools.py
deleted file mode 100644
index 6ec83b3d5c..0000000000
--- a/build_gyp/find_depot_tools.py
+++ /dev/null
@@ -1,60 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2016 PDFium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-"""Small utility function to find depot_tools and add it to the python path.
-
-Will throw an ImportError exception if depot_tools can't be found since it
-imports breakpad.
-
-This can also be used as a standalone script to print out the depot_tools
-directory location.
-"""
-
-import os
-import sys
-
-
-def IsRealDepotTools(path):
-  return os.path.isfile(os.path.join(path, 'gclient.py'))
-
-
-def add_depot_tools_to_path():
-  """Search for depot_tools and add it to sys.path."""
-  # First look if depot_tools is already in PYTHONPATH.
-  for i in sys.path:
-    if i.rstrip(os.sep).endswith('depot_tools') and IsRealDepotTools(i):
-      return i
-  # Then look if depot_tools is in PATH, common case.
-  for i in os.environ['PATH'].split(os.pathsep):
-    if IsRealDepotTools(i):
-      sys.path.append(i.rstrip(os.sep))
-      return i
-  # Rare case, it's not even in PATH, look upward up to root.
-  root_dir = os.path.dirname(os.path.abspath(__file__))
-  previous_dir = os.path.abspath(__file__)
-  while root_dir and root_dir != previous_dir:
-    i = os.path.join(root_dir, 'depot_tools')
-    if IsRealDepotTools(i):
-      sys.path.append(i)
-      return i
-    previous_dir = root_dir
-    root_dir = os.path.dirname(root_dir)
-  print >> sys.stderr, 'Failed to find depot_tools'
-  return None
-
-DEPOT_TOOLS_PATH = add_depot_tools_to_path()
-
-# pylint: disable=W0611
-import breakpad
-
-
-def main():
-  if DEPOT_TOOLS_PATH is None:
-    return 1
-  print DEPOT_TOOLS_PATH
-  return 0
-
-
-if __name__ == '__main__':
-  sys.exit(main())
diff --git a/build_gyp/gyp_pdfium b/build_gyp/gyp_pdfium
index 23b1c719c2..6a2540391c 100755
--- a/build_gyp/gyp_pdfium
+++ b/build_gyp/gyp_pdfium
@@ -17,7 +17,9 @@ output_rel_dir = 'out'
 
 sys.path.insert(0, os.path.join(pdfium_root, 'tools', 'gyp', 'pylib'))
 import gyp
+
 # vs_toolchain needs to be after gyp path setting since it also uses gyp.
+sys.path.insert(0, os.path.join(pdfium_root, 'build'))
 import vs_toolchain
 
 def run_gyp(args):
diff --git a/build_gyp/mac_find_sdk.py b/build_gyp/mac_find_sdk.py
deleted file mode 100644
index 230c2fd52e..0000000000
--- a/build_gyp/mac_find_sdk.py
+++ /dev/null
@@ -1,93 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2016 PDFium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""Prints the lowest locally available SDK version greater than or equal to a
-given minimum sdk version to standard output.
-
-Usage:
-  python mac_find_sdk.py 10.6  # Ignores SDKs < 10.6
-"""
-
-import os
-import re
-import subprocess
-import sys
-
-
-from optparse import OptionParser
-
-
-def parse_version(version_str):
-  """'10.6' => [10, 6]"""
-  return map(int, re.findall(r'(\d+)', version_str))
-
-
-def main():
-  parser = OptionParser()
-  parser.add_option("--verify",
-                    action="store_true", dest="verify", default=False,
-                    help="return the sdk argument and warn if it doesn't exist")
-  parser.add_option("--sdk_path",
-                    action="store", type="string", dest="sdk_path", default="",
-                    help="user-specified SDK path; bypasses verification")
-  parser.add_option("--print_sdk_path",
-                    action="store_true", dest="print_sdk_path", default=False,
-                    help="Additionaly print the path the SDK (appears first).")
-  options, args = parser.parse_args()
-  if len(args) != 1:
-    parser.error('Please specify a minimum SDK version')
-  min_sdk_version = args[0]
-
-  job = subprocess.Popen(['xcode-select', '-print-path'],
-                         stdout=subprocess.PIPE,
-                         stderr=subprocess.STDOUT)
-  out, err = job.communicate()
-  if job.returncode != 0:
-    print >> sys.stderr, out
-    print >> sys.stderr, err
-    raise Exception(('Error %d running xcode-select, you might have to run '
-      '|sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer| '
-      'if you are using Xcode 4.') % job.returncode)
-  # The Developer folder moved in Xcode 4.3.
-  xcode43_sdk_path = os.path.join(
-      out.rstrip(), 'Platforms/MacOSX.platform/Developer/SDKs')
-  if os.path.isdir(xcode43_sdk_path):
-    sdk_dir = xcode43_sdk_path
-  else:
-    sdk_dir = os.path.join(out.rstrip(), 'SDKs')
-  sdks = [re.findall('^MacOSX(10\.\d+)\.sdk$', s) for s in os.listdir(sdk_dir)]
-  sdks = [s[0] for s in sdks if s]  # [['10.5'], ['10.6']] => ['10.5', '10.6']
-  sdks = [s for s in sdks  # ['10.5', '10.6'] => ['10.6']
-          if parse_version(s) >= parse_version(min_sdk_version)]
-  if not sdks:
-    raise Exception('No %s+ SDK found' % min_sdk_version)
-  best_sdk = sorted(sdks, key=parse_version)[0]
-
-  if options.verify and best_sdk != min_sdk_version and not options.sdk_path:
-    print >> sys.stderr, ''
-    print >> sys.stderr, '                                           vvvvvvv'
-    print >> sys.stderr, ''
-    print >> sys.stderr, \
-        'This build requires the %s SDK, but it was not found on your system.' \
-        % min_sdk_version
-    print >> sys.stderr, \
-        'Either install it, or explicitly set mac_sdk in your GYP_DEFINES.'
-    print >> sys.stderr, ''
-    print >> sys.stderr, '                                           ^^^^^^^'
-    print >> sys.stderr, ''
-    return min_sdk_version
-
-  if options.print_sdk_path:
-    print subprocess.check_output(['xcodebuild', '-version', '-sdk',
-                                   'macosx' + best_sdk, 'Path']).strip()
-
-  return best_sdk
-
-
-if __name__ == '__main__':
-  if sys.platform != 'darwin':
-    raise Exception("This script only runs on Mac")
-  print main()
-  sys.exit(0)
diff --git a/build_gyp/standalone.gypi b/build_gyp/standalone.gypi
index f7cad6622a..67ed204409 100644
--- a/build_gyp/standalone.gypi
+++ b/build_gyp/standalone.gypi
@@ -453,7 +453,7 @@
         ],  # target_conditions
         'variables': {
           'mac_sdk_min': '10.10',
-          'mac_sdk%': '<!(python <(DEPTH)/build_gyp/mac_find_sdk.py <(mac_sdk_min))',
+          'mac_sdk%': '<!(python <(DEPTH)/build/mac/find_sdk.py <(mac_sdk_min))',
         },
         'xcode_settings': {
           'SDKROOT': 'macosx<(mac_sdk)',  # -isysroot
diff --git a/build_gyp/vs_toolchain.py b/build_gyp/vs_toolchain.py
deleted file mode 100644
index 3424650913..0000000000
--- a/build_gyp/vs_toolchain.py
+++ /dev/null
@@ -1,378 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2016 PDFium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-import glob
-import json
-import os
-import pipes
-import shutil
-import subprocess
-import sys
-
-
-script_dir = os.path.dirname(os.path.realpath(__file__))
-src_root = os.path.abspath(os.path.join(script_dir, os.pardir))
-SRC_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
-# Add gyp path which is needed to import gyp.
-sys.path.insert(0, os.path.join(src_root, 'tools', 'gyp', 'pylib'))
-json_data_file = os.path.join(script_dir, 'win_toolchain.json')
-
-
-import gyp
-
-
-# Use MSVS2015 as the default toolchain.
-CURRENT_DEFAULT_TOOLCHAIN_VERSION = '2015'
-
-
-def SetEnvironmentAndGetRuntimeDllDirs():
-  """Sets up os.environ to use the depot_tools VS toolchain with gyp, and
-  returns the location of the VS runtime DLLs so they can be copied into
-  the output directory after gyp generation.
-  """
-  vs_runtime_dll_dirs = None
-  depot_tools_win_toolchain = \
-      bool(int(os.environ.get('DEPOT_TOOLS_WIN_TOOLCHAIN', '1')))
-  # When running on a non-Windows host, only do this if the SDK has explicitly
-  # been downloaded before (in which case json_data_file will exist).
-  if ((sys.platform in ('win32', 'cygwin') or os.path.exists(json_data_file))
-      and depot_tools_win_toolchain):
-    if ShouldUpdateToolchain():
-      Update()
-    with open(json_data_file, 'r') as tempf:
-      toolchain_data = json.load(tempf)
-
-    toolchain = toolchain_data['path']
-    version = toolchain_data['version']
-    win_sdk = toolchain_data.get('win_sdk')
-    if not win_sdk:
-      win_sdk = toolchain_data['win8sdk']
-    wdk = toolchain_data['wdk']
-    # TODO(scottmg): The order unfortunately matters in these. They should be
-    # split into separate keys for x86 and x64. (See CopyVsRuntimeDlls call
-    # below). http://crbug.com/345992
-    vs_runtime_dll_dirs = toolchain_data['runtime_dirs']
-
-    os.environ['GYP_MSVS_OVERRIDE_PATH'] = toolchain
-    os.environ['GYP_MSVS_VERSION'] = version
-    # We need to make sure windows_sdk_path is set to the automated
-    # toolchain values in GYP_DEFINES, but don't want to override any
-    # otheroptions.express
-    # values there.
-    gyp_defines_dict = gyp.NameValueListToDict(gyp.ShlexEnv('GYP_DEFINES'))
-    gyp_defines_dict['windows_sdk_path'] = win_sdk
-    os.environ['GYP_DEFINES'] = ' '.join('%s=%s' % (k, pipes.quote(str(v)))
-        for k, v in gyp_defines_dict.iteritems())
-    os.environ['WINDOWSSDKDIR'] = win_sdk
-    os.environ['WDK_DIR'] = wdk
-    # Include the VS runtime in the PATH in case it's not machine-installed.
-    runtime_path = os.path.pathsep.join(vs_runtime_dll_dirs)
-    os.environ['PATH'] = runtime_path + os.path.pathsep + os.environ['PATH']
-  elif sys.platform == 'win32' and not depot_tools_win_toolchain:
-    if not 'GYP_MSVS_OVERRIDE_PATH' in os.environ:
-      os.environ['GYP_MSVS_OVERRIDE_PATH'] = DetectVisualStudioPath()
-    if not 'GYP_MSVS_VERSION' in os.environ:
-      os.environ['GYP_MSVS_VERSION'] = GetVisualStudioVersion()
-
-  return vs_runtime_dll_dirs
-
-
-def _RegistryGetValueUsingWinReg(key, value):
-  """Use the _winreg module to obtain the value of a registry key.
-
-  Args:
-    key: The registry key.
-    value: The particular registry value to read.
-  Return:
-    contents of the registry key's value, or None on failure.  Throws
-    ImportError if _winreg is unavailable.
-  """
-  import _winreg
-  try:
-    root, subkey = key.split('\\', 1)
-    assert root == 'HKLM'  # Only need HKLM for now.
-    with _winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE, subkey) as hkey:
-      return _winreg.QueryValueEx(hkey, value)[0]
-  except WindowsError:
-    return None
-
-
-def _RegistryGetValue(key, value):
-  try:
-    return _RegistryGetValueUsingWinReg(key, value)
-  except ImportError:
-    raise Exception('The python library _winreg not found.')
-
-
-def GetVisualStudioVersion():
-  """Return GYP_MSVS_VERSION of Visual Studio.
-  """
-  return os.environ.get('GYP_MSVS_VERSION', CURRENT_DEFAULT_TOOLCHAIN_VERSION)
-
-
-def DetectVisualStudioPath():
-  """Return path to the GYP_MSVS_VERSION of Visual Studio.
-  """
-
-  # Note that this code is used from
-  # build/toolchain/win/setup_toolchain.py as well.
-  version_as_year = GetVisualStudioVersion()
-  year_to_version = {
-      '2013': '12.0',
-      '2015': '14.0',
-  }
-  if version_as_year not in year_to_version:
-    raise Exception(('Visual Studio version %s (from GYP_MSVS_VERSION)'
-                     ' not supported. Supported versions are: %s') % (
-                       version_as_year, ', '.join(year_to_version.keys())))
-  version = year_to_version[version_as_year]
-  keys = [r'HKLM\Software\Microsoft\VisualStudio\%s' % version,
-          r'HKLM\Software\Wow6432Node\Microsoft\VisualStudio\%s' % version]
-  for key in keys:
-    path = _RegistryGetValue(key, 'InstallDir')
-    if not path:
-      continue
-    path = os.path.normpath(os.path.join(path, '..', '..'))
-    return path
-
-  raise Exception(('Visual Studio Version %s (from GYP_MSVS_VERSION)'
-                   ' not found.') % (version_as_year))
-
-
-def _VersionNumber():
-  """Gets the standard version number ('120', '140', etc.) based on
-  GYP_MSVS_VERSION."""
-  vs_version = GetVisualStudioVersion()
-  if vs_version == '2013':
-    return '120'
-  elif vs_version == '2015':
-    return '140'
-  else:
-    raise ValueError('Unexpected GYP_MSVS_VERSION')
-
-
-def _CopyRuntimeImpl(target, source, verbose=True):
-  """Copy |source| to |target| if it doesn't already exist or if it
-  needs to be updated.
-  """
-  if (os.path.isdir(os.path.dirname(target)) and
-      (not os.path.isfile(target) or
-      os.stat(target).st_mtime != os.stat(source).st_mtime)):
-    if verbose:
-      print 'Copying %s to %s...' % (source, target)
-    if os.path.exists(target):
-      os.unlink(target)
-    shutil.copy2(source, target)
-
-
-def _CopyRuntime2013(target_dir, source_dir, dll_pattern):
-  """Copy both the msvcr and msvcp runtime DLLs, only if the target doesn't
-  exist, but the target directory does exist."""
-  for file_part in ('p', 'r'):
-    dll = dll_pattern % file_part
-    target = os.path.join(target_dir, dll)
-    source = os.path.join(source_dir, dll)
-    _CopyRuntimeImpl(target, source)
-
-
-def _CopyRuntime2015(target_dir, source_dir, dll_pattern, suffix):
-  """Copy both the msvcp and vccorlib runtime DLLs, only if the target doesn't
-  exist, but the target directory does exist."""
-  for file_part in ('msvcp', 'vccorlib', 'vcruntime'):
-    dll = dll_pattern % file_part
-    target = os.path.join(target_dir, dll)
-    source = os.path.join(source_dir, dll)
-    _CopyRuntimeImpl(target, source)
-  ucrt_src_dir = os.path.join(source_dir, 'api-ms-win-*.dll')
-  print 'Copying %s to %s...' % (ucrt_src_dir, target_dir)
-  for ucrt_src_file in glob.glob(ucrt_src_dir):
-    file_part = os.path.basename(ucrt_src_file)
-    ucrt_dst_file = os.path.join(target_dir, file_part)
-    _CopyRuntimeImpl(ucrt_dst_file, ucrt_src_file, False)
-  _CopyRuntimeImpl(os.path.join(target_dir, 'ucrtbase' + suffix),
-                    os.path.join(source_dir, 'ucrtbase' + suffix))
-
-
-def _CopyRuntime(target_dir, source_dir, target_cpu, debug):
-  """Copy the VS runtime DLLs, only if the target doesn't exist, but the target
-  directory does exist. Handles VS 2013 and VS 2015."""
-  suffix = "d.dll" if debug else ".dll"
-  if GetVisualStudioVersion() == '2015':
-    _CopyRuntime2015(target_dir, source_dir, '%s140' + suffix, suffix)
-  else:
-    _CopyRuntime2013(target_dir, source_dir, 'msvc%s120' + suffix)
-
-  # Copy the PGO runtime library to the release directories.
-  if not debug and os.environ.get('GYP_MSVS_OVERRIDE_PATH'):
-    pgo_x86_runtime_dir = os.path.join(os.environ.get('GYP_MSVS_OVERRIDE_PATH'),
-                                        'VC', 'bin')
-    pgo_x64_runtime_dir = os.path.join(pgo_x86_runtime_dir, 'amd64')
-    pgo_runtime_dll = 'pgort' + _VersionNumber() + '.dll'
-    if target_cpu == "x86":
-      source_x86 = os.path.join(pgo_x86_runtime_dir, pgo_runtime_dll)
-      if os.path.exists(source_x86):
-        _CopyRuntimeImpl(os.path.join(target_dir, pgo_runtime_dll), source_x86)
-    elif target_cpu == "x64":
-      source_x64 = os.path.join(pgo_x64_runtime_dir, pgo_runtime_dll)
-      if os.path.exists(source_x64):
-        _CopyRuntimeImpl(os.path.join(target_dir, pgo_runtime_dll),
-                          source_x64)
-    else:
-      raise NotImplementedError("Unexpected target_cpu value:" + target_cpu)
-
-
-def CopyVsRuntimeDlls(output_dir, runtime_dirs):
-  """Copies the VS runtime DLLs from the given |runtime_dirs| to the output
-  directory so that even if not system-installed, built binaries are likely to
-  be able to run.
-
-  This needs to be run after gyp has been run so that the expected target
-  output directories are already created.
-
-  This is used for the GYP build and gclient runhooks.
-  """
-  x86, x64 = runtime_dirs
-  out_debug = os.path.join(output_dir, 'Debug')
-  out_debug_nacl64 = os.path.join(output_dir, 'Debug', 'x64')
-  out_release = os.path.join(output_dir, 'Release')
-  out_release_nacl64 = os.path.join(output_dir, 'Release', 'x64')
-  out_debug_x64 = os.path.join(output_dir, 'Debug_x64')
-  out_release_x64 = os.path.join(output_dir, 'Release_x64')
-
-  if os.path.exists(out_debug) and not os.path.exists(out_debug_nacl64):
-    os.makedirs(out_debug_nacl64)
-  if os.path.exists(out_release) and not os.path.exists(out_release_nacl64):
-    os.makedirs(out_release_nacl64)
-  _CopyRuntime(out_debug,          x86, "x86", debug=True)
-  _CopyRuntime(out_release,        x86, "x86", debug=False)
-  _CopyRuntime(out_debug_x64,      x64, "x64", debug=True)
-  _CopyRuntime(out_release_x64,    x64, "x64", debug=False)
-  _CopyRuntime(out_debug_nacl64,   x64, "x64", debug=True)
-  _CopyRuntime(out_release_nacl64, x64, "x64", debug=False)
-
-
-def CopyDlls(target_dir, configuration, target_cpu):
-  """Copy the VS runtime DLLs into the requested directory as needed.
-
-  configuration is one of 'Debug' or 'Release'.
-  target_cpu is one of 'x86' or 'x64'.
-
-  The debug configuration gets both the debug and release DLLs; the
-  release config only the latter.
-
-  This is used for the GN build.
-  """
-  vs_runtime_dll_dirs = SetEnvironmentAndGetRuntimeDllDirs()
-  if not vs_runtime_dll_dirs:
-    return
-
-  x64_runtime, x86_runtime = vs_runtime_dll_dirs
-  runtime_dir = x64_runtime if target_cpu == 'x64' else x86_runtime
-  _CopyRuntime(target_dir, runtime_dir, target_cpu, debug=False)
-  if configuration == 'Debug':
-    _CopyRuntime(target_dir, runtime_dir, target_cpu, debug=True)
-
-
-def _GetDesiredVsToolchainHashes():
-  """Load a list of SHA1s corresponding to the toolchains that we want installed
-  to build with."""
-  if GetVisualStudioVersion() == '2015':
-    # Update 2.
-    return ['95ddda401ec5678f15eeed01d2bee08fcbc5ee97']
-  else:
-    return ['4087e065abebdca6dbd0caca2910c6718d2ec67f']
-
-
-def ShouldUpdateToolchain():
-  """Check if the toolchain should be upgraded."""
-  if not os.path.exists(json_data_file):
-    return True
-  with open(json_data_file, 'r') as tempf:
-    toolchain_data = json.load(tempf)
-  version = toolchain_data['version']
-  env_version = GetVisualStudioVersion()
-  # If there's a mismatch between the version set in the environment and the one
-  # in the json file then the toolchain should be updated.
-  return version != env_version
-
-
-def Update(force=False):
-  """Requests an update of the toolchain to the specific hashes we have at
-  this revision. The update outputs a .json of the various configuration
-  information required to pass to gyp which we use in |GetToolchainDir()|.
-  """
-  if force != False and force != '--force':
-    print >>sys.stderr, 'Unknown parameter "%s"' % force
-    return 1
-  if force == '--force' or os.path.exists(json_data_file):
-    force = True
-
-  depot_tools_win_toolchain = \
-      bool(int(os.environ.get('DEPOT_TOOLS_WIN_TOOLCHAIN', '1')))
-  if ((sys.platform in ('win32', 'cygwin') or force) and
-        depot_tools_win_toolchain):
-    import find_depot_tools
-    depot_tools_path = find_depot_tools.add_depot_tools_to_path()
-    # Necessary so that get_toolchain_if_necessary.py will put the VS toolkit
-    # in the correct directory.
-    os.environ['GYP_MSVS_VERSION'] = GetVisualStudioVersion()
-    get_toolchain_args = [
-        sys.executable,
-        os.path.join(depot_tools_path,
-                    'win_toolchain',
-                    'get_toolchain_if_necessary.py'),
-        '--output-json', json_data_file,
-      ] + _GetDesiredVsToolchainHashes()
-    if force:
-      get_toolchain_args.append('--force')
-    subprocess.check_call(get_toolchain_args)
-
-  return 0
-
-
-def NormalizePath(path):
-  while path.endswith("\\"):
-    path = path[:-1]
-  return path
-
-
-def GetToolchainDir():
-  """Gets location information about the current toolchain (must have been
-  previously updated by 'update'). This is used for the GN build."""
-  runtime_dll_dirs = SetEnvironmentAndGetRuntimeDllDirs()
-
-  # If WINDOWSSDKDIR is not set, search the default SDK path and set it.
-  if not 'WINDOWSSDKDIR' in os.environ:
-    default_sdk_path = 'C:\\Program Files (x86)\\Windows Kits\\10'
-    if os.path.isdir(default_sdk_path):
-      os.environ['WINDOWSSDKDIR'] = default_sdk_path
-
-  print '''vs_path = "%s"
-sdk_path = "%s"
-vs_version = "%s"
-wdk_dir = "%s"
-runtime_dirs = "%s"
-''' % (
-      NormalizePath(os.environ['GYP_MSVS_OVERRIDE_PATH']),
-      NormalizePath(os.environ['WINDOWSSDKDIR']),
-      GetVisualStudioVersion(),
-      NormalizePath(os.environ.get('WDK_DIR', '')),
-      os.path.pathsep.join(runtime_dll_dirs or ['None']))
-
-
-def main():
-  commands = {
-      'update': Update,
-      'get_toolchain_dir': GetToolchainDir,
-      'copy_dlls': CopyDlls,
-  }
-  if len(sys.argv) < 2 or sys.argv[1] not in commands:
-    print >>sys.stderr, 'Expected one of: %s' % ', '.join(commands)
-    return 1
-  return commands[sys.argv[1]](*sys.argv[2:])
-
-
-if __name__ == '__main__':
-  sys.exit(main())