[Android] Add a gyp option to disable generating v14 resources script.

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.
@@ skipping 80 matching lines @@
               list(root_node.getElementsByTagName('style')))
 
 
 def ErrorIfStyleResourceExistsInDir(input_dir):
   """If a style resource is in input_dir, exist with an error message."""
   for input_filename in build_utils.FindInDirectory(input_dir, '*.xml'):
     dom = minidom.parse(input_filename)
     if HasStyleResource(dom):
       raise Exception('error: style file ' + input_filename +
                       ' should be under ' + input_dir +
-                      '-v17 directory. Please refer to crbug.com/243952 '
-                      'for the details.')
+                      '-v17 directory. Please refer to '
+                      'http://crbug.com/243952 for the details.')
 
 
-def GenerateV14LayoutResourceDom(dom, filename):
+def GenerateV14LayoutResourceDom(dom, filename_for_warning):
   """Convert layout resource to API 14 compatible layout resource.
 
   Args:
     dom: parsed minidom object to be modified.
-    filename: file name to display in case we print warnings.
+    filename_for_warning: file name to display in case we print warnings.
+                          If None, do not print warning.
   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
-      else:
-        WarnIfDeprecatedAttribute(name, value, filename)
+      elif filename_for_warning:
+        WarnIfDeprecatedAttribute(name, value, filename_for_warning)
 
   return is_modified
 
 
-def GenerateV14StyleResourceDom(dom, filename):
+def GenerateV14StyleResourceDom(dom, filename_for_warning):
   """Convert style resource to API 14 compatible style resource.
 
   Args:
     dom: parsed minidom object to be modified.
-    filename: file name to display in case we print warnings.
+    filename_for_warning: file name to display in case we print warnings.
+                          If None, do not print warning.
+  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]
-      else:
-        WarnIfDeprecatedAttribute(name, value, filename)
+        is_modified = True
+      elif filename_for_warning:
+        WarnIfDeprecatedAttribute(name, value, filename_for_warning)
+
+  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
@@ skipping 36 matching lines @@
 
 
 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 VerifyV14ResourcesInDir(input_dir, resource_type):
+  """Verify that the resources in input_dir is compatible with v14, i.e., they
+  don't use attributes that cause crashes on certain devices. Print an error if
+  they have."""
+  for input_filename in build_utils.FindInDirectory(input_dir, '*.xml'):
+    exception_message = ('error : ' + input_filename + ' has an RTL attribute, '
+                        'i.e., attribute that has "start" or "end" in its name.'
+                        ' Pre-v17 resources should not include it because it '
+                        'can cause crashes on certain devices. Please refer to '
+                        'http://crbug.com/243952 for the details.')
+    dom = minidom.parse(input_filename)
+    if resource_type in ('layout', 'xml'):
+      if GenerateV14LayoutResourceDom(dom, None):
+        raise Exception(exception_message)
+    elif resource_type == 'values':
+      if GenerateV14StyleResourceDom(dom, None):
+        raise Exception(exception_message)
+
+
+def WarnIfDeprecatedAttributeInDir(input_dir, resource_type):
+  """Print warning if resources in input_dir have deprecated attributes, e.g.,
+  paddingLeft, PaddingRight"""
+  for input_filename in build_utils.FindInDirectory(input_dir, '*.xml'):
+    dom = minidom.parse(input_filename)
+    if resource_type in ('layout', 'xml'):
+      GenerateV14LayoutResourceDom(dom, input_filename)
+    elif resource_type == 'values':
+      GenerateV14StyleResourceDom(dom, input_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')
+  parser.add_option('--verify-only', action="store_true", help='Do not generate'
+      ' v14 resources. Instead, just verify that the resources are already '
+      "compatible with v14, i.e. they don't use attributes that cause crashes "
+      'on certain devices.')
 
   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
@@ skipping 18 matching lines @@
     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
 
-    # We also need to copy the original v17 resource to *-v17 directory
-    # because the generated v14 resource will hide the original resource.
-    input_dir = os.path.join(options.res_dir, name)
-    output_v14_dir = os.path.join(options.res_v14_compatibility_dir, name)
-    output_v17_dir = os.path.join(options.res_v14_compatibility_dir, name +
-                                                                     '-v17')
+    input_dir = os.path.abspath(os.path.join(options.res_dir, name))
 
-    # 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(options.res_v14_compatibility_dir,
-                                      '-'.join([resource_type] +
-                                               output_qualifiers))
-        GenerateV14StyleResourcesInDir(input_dir, output_v14_dir)
-      elif not api_level_qualifier:
-        ErrorIfStyleResourceExistsInDir(input_dir)
+    if options.verify_only:
+      if not api_level_qualifier or int(api_level_qualifier[1:]) < 17:
+        VerifyV14ResourcesInDir(input_dir, resource_type)
+      else:
+        WarnIfDeprecatedAttributeInDir(input_dir, resource_type)
+    else:
+      # 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(options.res_v14_compatibility_dir, name)
+      output_v17_dir = os.path.join(options.res_v14_compatibility_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(options.res_v14_compatibility_dir,
+                                        '-'.join([resource_type] +
+                                                 output_qualifiers))
+          GenerateV14StyleResourcesInDir(input_dir, output_v14_dir)
+        elif not api_level_qualifier:
+          ErrorIfStyleResourceExistsInDir(input_dir)
 
   if options.stamp:
     build_utils.Touch(options.stamp)
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))