[bindings] partial interfaces should not violate componentization

Source/bindings/scripts/generate_init_partial_interfaces.py

+#!/usr/bin/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.
+
+"""Generate initPartialInterfacesInModules(), which registers partial interfaces in modules to core interfaces."""
+
+import cPickle as pickle
+from optparse import OptionParser
+import os
+import posixpath
+import sys
+from utilities import write_file
+
+from aggregate_generated_bindings import extract_meta_data
+from utilities import read_idl_files_list_from_file
+
+
+_COPYRIGHT = """// 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.
+
+"""
+
+_INIT_PARTIAL_INTERFACE = """%s
+#include "config.h"
+
+%s
+
+namespace blink {
+
+void initPartialInterfacesInModules()
+{
+%s
+}
+
+} // namespace blink
+"""
+
+
+def parse_options():
+    usage = 'Usage: %prog [options]'
+    parser = OptionParser(usage=usage)
+    parser.add_option('--idl-files-list', help="a text file containing the IDL file paths, so the command line doesn't exceed OS length limits.")
+    parser.add_option('--write-file-only-if-changed', type='int', help='if true, do not write an output file if it would be identical to the existing one, which avoids unnecessary rebuilds in ninja')
+    parser.add_option('--output')
+
+    options, args = parser.parse_args()
+    if options.output is None:
+        parser.error('Must specify output file using --output.')
+    if options.idl_files_list is None:
+        parser.error('Must specify a list of IDL files using --idl-files-list.')
+    if options.write_file_only_if_changed is None:
+        parser.error('Must specify whether file is only written if changed using --write-file-only-if-changed.')
+    options.write_file_only_if_changed = bool(options.write_file_only_if_changed)
+    return options
+
+
+def main():
+    options = parse_options()
+
+    idl_file_names = read_idl_files_list_from_file(options.idl_files_list)
+
+    meta_data_list = extract_meta_data(idl_file_names)
+    interface_names = ['V8%sPartial' % meta_data['name']
+                       for meta_data in meta_data_list]
+    interface_names.sort()
+
+    includes = ['#include "bindings/modules/v8/%s.h"' % interface_name
+                for interface_name in interface_names]
+    initialize_calls = ['    %s::initialize();' % interface_name
+                        for interface_name in interface_names]
+
+    content = _INIT_PARTIAL_INTERFACE % (
+        _COPYRIGHT,
+        '\n'.join(includes),
+        '\n'.join(initialize_calls))
+
+    write_file(content, options.output,
+               only_if_changed=options.write_file_only_if_changed)
+
+
+if __name__ == '__main__':
+    sys.exit(main())