PPAPI Patching System and Unit Tests

visual_studio/NativeClientVSAddIn/InstallerResources/create_ppapi_platform.py

+#!/usr/bin/env python
+# Copyright (c) 2012 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.
+
+""" This script creates the PPAPI project settings template.
+
+For copyright reasons, we should not directly distribute the PPAPI template
+because it is nearly a clone of the Win32 template which is Copyrighted.
+Instead, this script copies the existing Win32 template from the user's system
+and intelligently modifies the copy to be the PPAPI template.
+"""
+
+import os
+import shutil
+import string
+import xml_patch
+import xml.etree.ElementTree
+
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+
+PLATFORM_FILES = [
+    ('Microsoft.Cpp.Win32.default.props',
+     'Microsoft.Cpp.[platform].default.props.patch',
+     'Microsoft.Cpp.PPAPI.default.props'),
+    ('Microsoft.Cpp.Win32.props',
+     'Microsoft.Cpp.[platform].props.patch',
+     'Microsoft.Cpp.PPAPI.props'),
+    ('Microsoft.Cpp.Win32.targets',
+     'Microsoft.Cpp.[platform].targets.patch',
+     'Microsoft.Cpp.PPAPI.targets'),
+    ('PlatformToolsets\\v100\\Microsoft.Cpp.Win32.v100.props',
+     'PlatformToolsets\\v100\\Microsoft.Cpp.[platform].v100.props.patch',
+     'PlatformToolsets\\v100\\Microsoft.Cpp.PPAPI.v100.props'),
+    ('PlatformToolsets\\v100\\Microsoft.Cpp.Win32.v100.targets',
+     'PlatformToolsets\\v100\\Microsoft.Cpp.[platform].v100.targets.patch',
+     'PlatformToolsets\\v100\\Microsoft.Cpp.PPAPI.v100.targets')]
+
+UI_FILES = [
+    ('general.xml',
+     'Props\\ppapi_general.xml.patch',
+     'Props\\ppapi_general.xml'),
+    ('general_ps.xml',
+     'Props\\ppapi_general_ps.xml.patch',
+     'Props\\ppapi_general_ps.xml')]
+
+COPY_FILES = [
+    'ImportAfter\\PPAPI.override.props']
+
+
+def PrependCopyright(source_file_name, dest_file_name):
+  """Adds the copyright notice from source file to the dest file.
+
+  Since the patch_xml function does not read comments, the copyright is skipped
+  during the initial copy. This function adds it back and also attaches a
+  notice that the file was based on source_file_name and slightly modified.
+
+  Args:
+    source_file_name: The original Win32 file.
+    dest_file_name: The existing PPAPI file.
+
+  Returns:
+    None.
+  """
+  with open(source_file_name, 'r') as source_file:
+    in_copyright = False
+    copyright_notice = ''
+    for line in source_file:
+      if '<!--' in line:
+        in_copyright = True
+      if in_copyright:
+        copyright_notice += line
+      if '-->' in line:
+        in_copyright = False
+        break
+
+  with open(dest_file_name, 'r') as original:
+    xml_data = original.read()
+
+  chrome_notice = ('<!-- This file has been copied and modified from %s during '
+                   'the installation process. -->\n\n' % (source_file_name))
+
+  with open(dest_file_name, 'w') as changed:
+    changed.writelines(copyright_notice + chrome_notice + xml_data)
+
+
+def CreateTemplateFile(source, patch, dest):
+  """Creates a single PPAPI template file.
+
+  Args:
+    source: The path source file to create from.
+    patch: The path to the patch file to apply.
+    dest: The path to the file to create.
+  Returns:
+    None.
+  """
+  source_xml = xml.etree.ElementTree.parse(source)
+  patch_xml = xml.etree.ElementTree.parse(patch)
+  modified_xml = xml_patch.PatchXML(source_xml, patch_xml)
+
+  if not os.path.exists(os.path.dirname(dest)):
+    os.makedirs(os.path.dirname(dest))
+
+  FixAttributesNamespace(modified_xml)
+  default_namespace = GetDefaultNamespace(modified_xml)
+  modified_xml.write(dest, default_namespace=default_namespace)
+  PrependCopyright(source, dest)
+
+
+def GetDefaultNamespace(tree):
+  # Returns the uri (namespace identifier) of the root element.
+  tag = tree.getroot().tag
+  if tag.startswith("{"):
+    uri, rest = tag[1:].rsplit("}", 1)
+    return uri
+  else:
+    return None
+
+
+def FixAttributesNamespace(tree):
+  # ElementTree's implementation seems to be broken in that attributes
+  # do not inherit the default namespace of their node or parent nodes.
+  # This causes issues with ElementTree.write() when using a default namespace.
+  # Since the attributes do not have a namespace, the code that collects a
+  # mapping between local names and qualified names (with a namespace) breaks.
+  # The work-around is to give all attributes the default namespace.
+  default_namespace = GetDefaultNamespace(tree)
+  for elem in tree.getroot().getiterator():
+    new_attrib = dict()
+    for key, value in elem.attrib.items():
+      # If the attribute does not have a namespace yet then give it one.
+      if key[:1] != "{":
+        new_key = "{%s}%s" % (default_namespace, key)
+        new_attrib[new_key] = value
+      else:
+        new_attrib[key] = value
+    elem.attrib = new_attrib
+
+
+def main():
+  install_dir = os.path.expandvars(
+      '%ProgramFiles(x86)%\\MSBuild\\Microsoft.Cpp\\v4.0\\Platforms')
+
+  # Note 1033 is code for the english language.
+  ui_xml_dir = os.path.expandvars(
+      '%ProgramFiles(x86)%\\MSBuild\\Microsoft.Cpp\\v4.0\\1033')
+
+  win32_dir = os.path.join(install_dir, 'Win32')
+  ppapi_dir = os.path.join(install_dir, 'PPAPI')
+  patch_dir = os.path.join(SCRIPT_DIR, 'PPAPI_Patch')
+
+  if not os.path.exists(win32_dir):
+    raise Exception('Win32 platform is not installed on this machine!')
+
+  for template_creation in PLATFORM_FILES:
+    CreateTemplateFile(
+        os.path.join(win32_dir, template_creation[0]),
+        os.path.join(patch_dir, template_creation[1]),
+        os.path.join(ppapi_dir, template_creation[2]))
+
+  for template_creation in UI_FILES:
+    CreateTemplateFile(
+        os.path.join(ui_xml_dir, template_creation[0]),
+        os.path.join(patch_dir, template_creation[1]),
+        os.path.join(ppapi_dir, template_creation[2]))
+
+  for file_name in COPY_FILES:
+    copy_from = os.path.join(patch_dir, file_name)
+    copy_to = os.path.join(ppapi_dir, file_name)
+    if not os.path.exists(os.path.dirname(copy_to)):
+      os.makedirs(os.path.dirname(copy_to))
+    shutil.copyfile(copy_from, copy_to)
+
+  shutil.copyfile(
+      os.path.join(win32_dir, 'Microsoft.Build.CPPTasks.Win32.dll'),
+      os.path.join(ppapi_dir, 'Microsoft.Build.CPPTasks.PPAPI.dll'))
+
+
+if __name__ == '__main__':
+  main()