IDL: Generate union type containers

Source/bindings/scripts/idl_compiler.py

Index: Source/bindings/scripts/idl_compiler.py
diff --git a/Source/bindings/scripts/idl_compiler.py b/Source/bindings/scripts/idl_compiler.py
index 33d933ba4a1423e0ce8b3d326fa7dab2434340fa..6eb3ac785dad103cbfc515c8660d91a93fac6213 100755
--- a/Source/bindings/scripts/idl_compiler.py
+++ b/Source/bindings/scripts/idl_compiler.py
@@ -38,7 +38,7 @@ import os
 import cPickle as pickle
 import sys
 
-from code_generator_v8 import CodeGeneratorDictionaryImpl, CodeGeneratorV8
+from code_generator_v8 import CodeGeneratorDictionaryImpl, CodeGeneratorV8, CodeGeneratorUnionType
 from idl_reader import IdlReader
 from utilities import read_idl_files_list_from_file, write_file, idl_filename_to_component
 
@@ -47,10 +47,12 @@ def parse_options():
     parser = OptionParser()
     parser.add_option('--cache-directory',
                       help='cache directory, defaults to output directory')
-    parser.add_option('--generate-dictionary-impl',
+    parser.add_option('--generate-impl',
                       action="store_true", default=False)
     parser.add_option('--output-directory')
+    parser.add_option('--impl-output-directory')
     parser.add_option('--interfaces-info-file')
+    parser.add_option('--component-info-file')
     parser.add_option('--write-file-only-if-changed', type='int')
     # FIXME: We should always explicitly specify --target-component and
     # remove the default behavior.
@@ -156,7 +158,7 @@ def generate_bindings(options, input_filename):
 
 def generate_dictionary_impl(options, input_filename):
     idl_compiler = IdlCompilerDictionaryImpl(
-        options.output_directory,
+        options.impl_output_directory,
         cache_directory=options.cache_directory,
         interfaces_info_filename=options.interfaces_info_file,
         only_if_changed=options.write_file_only_if_changed)
@@ -166,12 +168,31 @@ def generate_dictionary_impl(options, input_filename):
         idl_compiler.compile_file(idl_filename)
 
 
+def generate_union_type_containers(options):
+    if not (options.interfaces_info_file and options.component_info_file):
+        raise Exception('Interfaces info is required to generate '
+                        'union types containers')
+    with open(options.interfaces_info_file) as interfaces_info_file:
+        interfaces_info = pickle.load(interfaces_info_file)
+    with open(options.component_info_file) as component_info_file:
+        component_info = pickle.load(component_info_file)
+    generator = CodeGeneratorUnionType(
+        interfaces_info,
+        options.cache_directory,
+        options.output_directory,
+        options.target_component)
+    output_code_list = generator.generate_code(component_info['union_types'])
+    for output_path, output_code in output_code_list:
+        write_file(output_code, output_path, options.write_file_only_if_changed)
+
+
 def main():
     options, input_filename = parse_options()
-    if options.generate_dictionary_impl:
+    if options.generate_impl:
         # |input_filename| should be a file which contains a list of IDL
         # dictionary paths.
         generate_dictionary_impl(options, input_filename)
+        generate_union_type_containers(options)
     else:
         # |input_filename| should be a path of an IDL file.
         generate_bindings(options, input_filename)