It is time.

ui/ozone/generate_constructor_list.py

-#!/usr/bin/env python
-# Copyright 2014 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.
-
-"""Code generator for PlatformObject<> constructor list.
-
-This script takes as arguments a list of platform names as a text file and
-a list of types and generates a C++ source file containing a list of
-the constructors for that object in platform order.
-
-Example Output: ./ui/ozone/generate_constructor_list.py \
-                    --platform test \
-                    --platform dri \
-                    --export OZONE_EXPORT \
-                    --namespace ui \
-                    --typename OzonePlatform \
-                    --include '"ui/ozone/ozone_platform.h"'
-
-  // DO NOT MODIFY. GENERATED BY generate_constructor_list.py
-
-  #include "ui/ozone/platform_object_internal.h"
-
-  #include "ui/ozone/ozone_platform.h"
-
-  namespace ui {
-
-  OzonePlatform* CreateOzonePlatformTest();
-  OzonePlatform* CreateOzonePlatformDri();
-
-  }  // namespace ui
-
-  namespace ui {
-
-  typedef ui::OzonePlatform* (*OzonePlatformConstructor)();
-
-  template <> const OzonePlatformConstructor
-  PlatformConstructorList<ui::OzonePlatform>::kConstructors[] = {
-    &ui::CreateOzonePlatformTest,
-    &ui::CreateOzonePlatformDri,
-  };
-
-  template class OZONE_EXPORT PlatformObject<ui::OzonePlatform>;
-
-  }  // namespace ui
-"""
-
-import optparse
-import os
-import collections
-import re
-import sys
-import string
-
-
-def GetTypedefName(typename):
-  """Determine typedef name of constructor for typename.
-
-  This is just typename + "Constructor".
-  """
-
-  return typename + 'Constructor'
-
-
-def GetConstructorName(typename, platform):
-  """Determine name of static constructor function from platform name.
-
-  This is just "Create" + typename + platform.
-  """
-
-  return 'Create' + typename + string.capitalize(platform)
-
-
-def GenerateConstructorList(out, namespace, export, typenames, platforms,
-                            includes):
-  """Generate static array containing a list of constructors."""
-
-  out.write('// DO NOT MODIFY. GENERATED BY generate_constructor_list.py\n')
-  out.write('\n')
-
-  out.write('#include "ui/ozone/platform_object_internal.h"\n')
-  out.write('\n')
-
-  for include in includes:
-    out.write('#include %(include)s\n' % {'include': include})
-  out.write('\n')
-
-  out.write('namespace %(namespace)s {\n' % {'namespace': namespace})
-  out.write('\n')
-
-  # Declarations of constructor functions.
-  for typename in typenames:
-    for platform in platforms:
-      constructor = GetConstructorName(typename, platform)
-      out.write('%(typename)s* %(constructor)s();\n'
-               % {'typename': typename,
-                  'constructor': constructor})
-    out.write('\n')
-
-  out.write('}  // namespace %(namespace)s\n' % {'namespace': namespace})
-  out.write('\n')
-
-  out.write('namespace ui {\n')
-  out.write('\n')
-
-  # Handy typedefs for constructor types.
-  for typename in typenames:
-    out.write('typedef %(typename)s* (*%(typedef)s)();\n'
-              % {'typename': namespace + '::' + typename,
-                 'typedef': GetTypedefName(typename)})
-  out.write('\n')
-
-  # The actual constructor lists.
-  for typename in typenames:
-    out.write('template <> const %(typedef)s\n'
-              % {'typedef': GetTypedefName(typename)})
-    out.write('PlatformConstructorList<%(typename)s>::kConstructors[] = {\n'
-              % {'typename': namespace + '::' + typename})
-    for platform in platforms:
-      constructor = GetConstructorName(typename, platform)
-      out.write('  &%(namespace)s::%(constructor)s,\n'
-                % {'namespace': namespace, 'constructor': constructor})
-    out.write('};\n')
-    out.write('\n')
-
-  # Exported template instantiation.
-  for typename in typenames:
-    out.write('template class %(export)s PlatformObject<%(typename)s>;\n'
-              % {'export': export, 'typename': namespace + '::' + typename})
-  out.write('\n')
-
-  out.write('}  // namespace ui\n')
-  out.write('\n')
-
-
-def main(argv):
-  parser = optparse.OptionParser()
-  parser.add_option('--namespace', default='ozone')
-  parser.add_option('--export', default='OZONE_EXPORT')
-  parser.add_option('--platform_list')
-  parser.add_option('--output_cc')
-  parser.add_option('--include', action='append', default=[])
-  parser.add_option('--platform', action='append', default=[])
-  parser.add_option('--typename', action='append', default=[])
-  options, _ = parser.parse_args(argv)
-
-  platforms = list(options.platform)
-  typenames = list(options.typename)
-  includes = list(options.include)
-
-  if options.platform_list:
-    platforms = open(options.platform_list, 'r').read().strip().split('\n')
-
-  # Write to standard output or file specified by --output_cc.
-  out_cc = sys.stdout
-  if options.output_cc:
-    out_cc = open(options.output_cc, 'wb')
-
-  GenerateConstructorList(out_cc, options.namespace, options.export,
-                          typenames, platforms, includes)
-
-  if options.output_cc:
-    out_cc.close()
-
-  return 0
-
-
-if __name__ == '__main__':
-  sys.exit(main(sys.argv[1:]))