Prase IDL files in common/extensions/api PRESUBMIT check.

chrome/common/extensions/api/PRESUBMIT.py

 # 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.
 
-def _GetJSONParseError(input_api, contents):
+def _GetJSONParseError(input_api, filename):
   try:
+    contents = input_api.ReadFile(filename)
     json_comment_eater = input_api.os_path.join(
         input_api.PresubmitLocalPath(),
         '..', '..', '..', '..', 'tools',
         'json_comment_eater', 'json_comment_eater.py')
     process = input_api.subprocess.Popen(
         [input_api.python_executable, json_comment_eater],
         stdin=input_api.subprocess.PIPE,
-        stdout=input_api.subprocess.PIPE)
+        stdout=input_api.subprocess.PIPE,
+        universal_newlines=True)
     (nommed, _) = process.communicate(input=contents)
     input_api.json.loads(nommed)
   except ValueError as e:
     return e
   return None
 
 
+def _GetIDLParseError(input_api, filename):
+  idl_schema = input_api.os_path.join(
+      input_api.PresubmitLocalPath(),
+      '..', '..', '..', '..', 'tools',
+      'json_schema_compiler', 'idl_schema.py')
+  process = input_api.subprocess.Popen(
+      [input_api.python_executable, idl_schema, filename],
+      stdout=input_api.subprocess.PIPE,
+      stderr=input_api.subprocess.PIPE,
+      universal_newlines=True)
+  (_, error) = process.communicate()
+  return error or None
+
+
 def _GetParseErrors(input_api, output_api):
   # Run unit tests.
   results = []
   if input_api.AffectedFiles(
       file_filter=lambda f: 'PRESUBMIT' in f.LocalPath()):
     results = input_api.canned_checks.RunUnitTestsInDirectory(
         input_api, output_api, '.', whitelist=[r'^PRESUBMIT_test\.py$'])
 
+  actions = {
+    '.idl': _GetIDLParseError,
+    '.json': _GetJSONParseError,
+  }
+
+  def get_action(affected_file):
+    filename = affected_file.LocalPath()
+    return actions.get(input_api.os_path.splitext(filename)[1])
+
   for affected_file in input_api.AffectedFiles(
-      file_filter=lambda f: f.LocalPath().endswith('.json'),
+      file_filter=
+          lambda f: "test_presubmit" not in f.LocalPath() and get_action(f),
       include_deletes=False):
-    filename = affected_file.AbsoluteLocalPath()
-    contents = input_api.ReadFile(filename)
-    parse_error = _GetJSONParseError(input_api, contents)
+    parse_error = get_action(affected_file)(input_api,
+                                            affected_file.AbsoluteLocalPath())
     if parse_error:
-      results.append(output_api.PresubmitError(
-          'Features file %s could not be parsed: %s' %
+      results.append(output_api.PresubmitError('%s could not be parsed: %s' %
           (affected_file.LocalPath(), parse_error)))
-    # TODO(yoz): Also ensure IDL files are parseable.
   return results
 
 
 def CheckChangeOnUpload(input_api, output_api):
   return _GetParseErrors(input_api, output_api)
 
 
 def CheckChangeOnCommit(input_api, output_api):
   return _GetParseErrors(input_api, output_api)