Removes files from //build that we don't need

build/android/gyp/generate_v14_compatible_resources.py

-#!/usr/bin/env python
-#
-# Copyright 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.
-
-"""Convert Android xml resources to API 14 compatible.
-
-There are two reasons that we cannot just use API 17 attributes,
-so we are generating another set of resources by this script.
-
-1. paddingStart attribute can cause a crash on Galaxy Tab 2.
-2. There is a bug that paddingStart does not override paddingLeft on
-   JB-MR1. This is fixed on JB-MR2. b/8654490
-
-Therefore, this resource generation script can be removed when
-we drop the support for JB-MR1.
-
-Please refer to http://crbug.com/235118 for the details.
-"""
-
-import optparse
-import os
-import re
-import shutil
-import sys
-import xml.dom.minidom as minidom
-
-from util import build_utils
-
-# Note that we are assuming 'android:' is an alias of
-# the namespace 'http://schemas.android.com/apk/res/android'.
-
-GRAVITY_ATTRIBUTES = ('android:gravity', 'android:layout_gravity')
-
-# Almost all the attributes that has "Start" or "End" in
-# its name should be mapped.
-ATTRIBUTES_TO_MAP = {'paddingStart' : 'paddingLeft',
-                     'drawableStart' : 'drawableLeft',
-                     'layout_alignStart' : 'layout_alignLeft',
-                     'layout_marginStart' : 'layout_marginLeft',
-                     'layout_alignParentStart' : 'layout_alignParentLeft',
-                     'layout_toStartOf' : 'layout_toLeftOf',
-                     'paddingEnd' : 'paddingRight',
-                     'drawableEnd' : 'drawableRight',
-                     'layout_alignEnd' : 'layout_alignRight',
-                     'layout_marginEnd' : 'layout_marginRight',
-                     'layout_alignParentEnd' : 'layout_alignParentRight',
-                     'layout_toEndOf' : 'layout_toRightOf'}
-
-ATTRIBUTES_TO_MAP = dict(['android:' + k, 'android:' + v] for k, v
-                         in ATTRIBUTES_TO_MAP.iteritems())
-
-ATTRIBUTES_TO_MAP_REVERSED = dict([v, k] for k, v
-                                  in ATTRIBUTES_TO_MAP.iteritems())
-
-
-def IterateXmlElements(node):
-  """minidom helper function that iterates all the element nodes.
-  Iteration order is pre-order depth-first."""
-  if node.nodeType == node.ELEMENT_NODE:
-    yield node
-  for child_node in node.childNodes:
-    for child_node_element in IterateXmlElements(child_node):
-      yield child_node_element
-
-
-def ParseAndReportErrors(filename):
-  try:
-    return minidom.parse(filename)
-  except Exception:
-    import traceback
-    traceback.print_exc()
-    sys.stderr.write('Failed to parse XML file: %s\n' % filename)
-    sys.exit(1)
-
-
-def AssertNotDeprecatedAttribute(name, value, filename):
-  """Raises an exception if the given attribute is deprecated."""
-  msg = None
-  if name in ATTRIBUTES_TO_MAP_REVERSED:
-    msg = '{0} should use {1} instead of {2}'.format(filename,
-        ATTRIBUTES_TO_MAP_REVERSED[name], name)
-  elif name in GRAVITY_ATTRIBUTES and ('left' in value or 'right' in value):
-    msg = '{0} should use start/end instead of left/right for {1}'.format(
-        filename, name)
-
-  if msg:
-    msg += ('\nFor background, see: http://android-developers.blogspot.com/'
-            '2013/03/native-rtl-support-in-android-42.html\n'
-            'If you have a legitimate need for this attribute, discuss with '
-            'kkimlabs@chromium.org or newt@chromium.org')
-    raise Exception(msg)
-
-
-def WriteDomToFile(dom, filename):
-  """Write the given dom to filename."""
-  build_utils.MakeDirectory(os.path.dirname(filename))
-  with open(filename, 'w') as f:
-    dom.writexml(f, '', '  ', '\n', encoding='utf-8')
-
-
-def HasStyleResource(dom):
-  """Return True if the dom is a style resource, False otherwise."""
-  root_node = IterateXmlElements(dom).next()
-  return bool(root_node.nodeName == 'resources' and
-              list(root_node.getElementsByTagName('style')))
-
-
-def ErrorIfStyleResourceExistsInDir(input_dir):
-  """If a style resource is in input_dir, raises an exception."""
-  for input_filename in build_utils.FindInDirectory(input_dir, '*.xml'):
-    dom = ParseAndReportErrors(input_filename)
-    if HasStyleResource(dom):
-      raise Exception('error: style file ' + input_filename +
-                      ' should be under ' + input_dir +
-                      '-v17 directory. Please refer to '
-                      'http://crbug.com/243952 for the details.')
-
-
-def GenerateV14LayoutResourceDom(dom, filename, assert_not_deprecated=True):
-  """Convert layout resource to API 14 compatible layout resource.
-
-  Args:
-    dom: Parsed minidom object to be modified.
-    filename: Filename that the DOM was parsed from.
-    assert_not_deprecated: Whether deprecated attributes (e.g. paddingLeft) will
-                           cause an exception to be thrown.
-
-  Returns:
-    True if dom is modified, False otherwise.
-  """
-  is_modified = False
-
-  # Iterate all the elements' attributes to find attributes to convert.
-  for element in IterateXmlElements(dom):
-    for name, value in list(element.attributes.items()):
-      # Convert any API 17 Start/End attributes to Left/Right attributes.
-      # For example, from paddingStart="10dp" to paddingLeft="10dp"
-      # Note: gravity attributes are not necessary to convert because
-      # start/end values are backward-compatible. Explained at
-      # https://plus.sandbox.google.com/+RomanNurik/posts/huuJd8iVVXY?e=Showroom
-      if name in ATTRIBUTES_TO_MAP:
-        element.setAttribute(ATTRIBUTES_TO_MAP[name], value)
-        del element.attributes[name]
-        is_modified = True
-      elif assert_not_deprecated:
-        AssertNotDeprecatedAttribute(name, value, filename)
-
-  return is_modified
-
-
-def GenerateV14StyleResourceDom(dom, filename, assert_not_deprecated=True):
-  """Convert style resource to API 14 compatible style resource.
-
-  Args:
-    dom: Parsed minidom object to be modified.
-    filename: Filename that the DOM was parsed from.
-    assert_not_deprecated: Whether deprecated attributes (e.g. paddingLeft) will
-                           cause an exception to be thrown.
-
-  Returns:
-    True if dom is modified, False otherwise.
-  """
-  is_modified = False
-
-  for style_element in dom.getElementsByTagName('style'):
-    for item_element in style_element.getElementsByTagName('item'):
-      name = item_element.attributes['name'].value
-      value = item_element.childNodes[0].nodeValue
-      if name in ATTRIBUTES_TO_MAP:
-        item_element.attributes['name'].value = ATTRIBUTES_TO_MAP[name]
-        is_modified = True
-      elif assert_not_deprecated:
-        AssertNotDeprecatedAttribute(name, value, filename)
-
-  return is_modified
-
-
-def GenerateV14LayoutResource(input_filename, output_v14_filename,
-                              output_v17_filename):
-  """Convert API 17 layout resource to API 14 compatible layout resource.
-
-  It's mostly a simple replacement, s/Start/Left s/End/Right,
-  on the attribute names.
-  If the generated resource is identical to the original resource,
-  don't do anything. If not, write the generated resource to
-  output_v14_filename, and copy the original resource to output_v17_filename.
-  """
-  dom = ParseAndReportErrors(input_filename)
-  is_modified = GenerateV14LayoutResourceDom(dom, input_filename)
-
-  if is_modified:
-    # Write the generated resource.
-    WriteDomToFile(dom, output_v14_filename)
-
-    # Copy the original resource.
-    build_utils.MakeDirectory(os.path.dirname(output_v17_filename))
-    shutil.copy2(input_filename, output_v17_filename)
-
-
-def GenerateV14StyleResource(input_filename, output_v14_filename):
-  """Convert API 17 style resources to API 14 compatible style resource.
-
-  Write the generated style resource to output_v14_filename.
-  It's mostly a simple replacement, s/Start/Left s/End/Right,
-  on the attribute names.
-  """
-  dom = ParseAndReportErrors(input_filename)
-  GenerateV14StyleResourceDom(dom, input_filename)
-
-  # Write the generated resource.
-  WriteDomToFile(dom, output_v14_filename)
-
-
-def GenerateV14LayoutResourcesInDir(input_dir, output_v14_dir, output_v17_dir):
-  """Convert layout resources to API 14 compatible resources in input_dir."""
-  for input_filename in build_utils.FindInDirectory(input_dir, '*.xml'):
-    rel_filename = os.path.relpath(input_filename, input_dir)
-    output_v14_filename = os.path.join(output_v14_dir, rel_filename)
-    output_v17_filename = os.path.join(output_v17_dir, rel_filename)
-    GenerateV14LayoutResource(input_filename, output_v14_filename,
-                              output_v17_filename)
-
-
-def GenerateV14StyleResourcesInDir(input_dir, output_v14_dir):
-  """Convert style resources to API 14 compatible resources in input_dir."""
-  for input_filename in build_utils.FindInDirectory(input_dir, '*.xml'):
-    rel_filename = os.path.relpath(input_filename, input_dir)
-    output_v14_filename = os.path.join(output_v14_dir, rel_filename)
-    GenerateV14StyleResource(input_filename, output_v14_filename)
-
-
-def ParseArgs():
-  """Parses command line options.
-
-  Returns:
-    An options object as from optparse.OptionsParser.parse_args()
-  """
-  parser = optparse.OptionParser()
-  parser.add_option('--res-dir',
-                    help='directory containing resources '
-                         'used to generate v14 compatible resources')
-  parser.add_option('--res-v14-compatibility-dir',
-                    help='output directory into which '
-                         'v14 compatible resources will be generated')
-  parser.add_option('--stamp', help='File to touch on success')
-
-  options, args = parser.parse_args()
-
-  if args:
-    parser.error('No positional arguments should be given.')
-
-  # Check that required options have been provided.
-  required_options = ('res_dir', 'res_v14_compatibility_dir')
-  build_utils.CheckOptions(options, parser, required=required_options)
-  return options
-
-def GenerateV14Resources(res_dir, res_v14_dir):
-  for name in os.listdir(res_dir):
-    if not os.path.isdir(os.path.join(res_dir, name)):
-      continue
-
-    dir_pieces = name.split('-')
-    resource_type = dir_pieces[0]
-    qualifiers = dir_pieces[1:]
-
-    api_level_qualifier_index = -1
-    api_level_qualifier = ''
-    for index, qualifier in enumerate(qualifiers):
-      if re.match('v[0-9]+$', qualifier):
-        api_level_qualifier_index = index
-        api_level_qualifier = qualifier
-        break
-
-    # Android pre-v17 API doesn't support RTL. Skip.
-    if 'ldrtl' in qualifiers:
-      continue
-
-    input_dir = os.path.abspath(os.path.join(res_dir, name))
-
-    # We also need to copy the original v17 resource to *-v17 directory
-    # because the generated v14 resource will hide the original resource.
-    output_v14_dir = os.path.join(res_v14_dir, name)
-    output_v17_dir = os.path.join(res_v14_dir, name + '-v17')
-
-    # We only convert layout resources under layout*/, xml*/,
-    # and style resources under values*/.
-    if resource_type in ('layout', 'xml'):
-      if not api_level_qualifier:
-        GenerateV14LayoutResourcesInDir(input_dir, output_v14_dir,
-                                        output_v17_dir)
-    elif resource_type == 'values':
-      if api_level_qualifier == 'v17':
-        output_qualifiers = qualifiers[:]
-        del output_qualifiers[api_level_qualifier_index]
-        output_v14_dir = os.path.join(res_v14_dir,
-                                      '-'.join([resource_type] +
-                                               output_qualifiers))
-        GenerateV14StyleResourcesInDir(input_dir, output_v14_dir)
-      elif not api_level_qualifier:
-        ErrorIfStyleResourceExistsInDir(input_dir)
-
-def main():
-  options = ParseArgs()
-
-  res_v14_dir = options.res_v14_compatibility_dir
-
-  build_utils.DeleteDirectory(res_v14_dir)
-  build_utils.MakeDirectory(res_v14_dir)
-
-  GenerateV14Resources(options.res_dir, res_v14_dir)
-
-  if options.stamp:
-    build_utils.Touch(options.stamp)
-
-if __name__ == '__main__':
-  sys.exit(main())
-