Presubmit checks for user actions intorduced in HTML files.

chrome/browser/resources/PRESUBMIT.py

Index: chrome/browser/resources/PRESUBMIT.py
diff --git a/chrome/browser/resources/PRESUBMIT.py b/chrome/browser/resources/PRESUBMIT.py
new file mode 100644
index 0000000000000000000000000000000000000000..9ec83d135184967b5363a4124f72932a8e81cab5
--- /dev/null
+++ b/chrome/browser/resources/PRESUBMIT.py
@@ -0,0 +1,47 @@
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.

[Alexei Svitkine (slow), 2014/11/11 20:36:41]

Nit: "Copyright 2014" (no (c))

[gayane -on leave until 09-2017, 2014/11/12 22:00:23]

Done.

+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+"""Presubmit script for HTML files in .
+
+See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
+for more details about the presubmit API built into gcl.
+"""
+
+def CheckUserActionUpdate(input_api, output_api):
+  print "here"
+  """Checks if any new user action has been added."""
+  if any('actions.xml' == input_api.os_path.basename(f) for f in
+         input_api.LocalPaths()):
+    # If actions.xml is already included in the changelist, the PRESUBMIT
+    # for actions.xml will do a more complete presubmit check.
+    return []
+
+  file_filter = lambda f: f.LocalPath().endswith(('.html'))
+  action_re = r'metric\s*=\s*"([^ ]*)"'

[Alexei Svitkine (slow), 2014/11/11 20:36:41]

Should we check for whitespace before the start of this? e.g. this will match
parametric= or some other prefixed thing which shouldn't trigger it.

Is it possible to write tests for this presubmit?

[gayane -on leave until 09-2017, 2014/11/12 22:00:23]

whitespaces or beginning of the line cases added to regex

+  current_actions = None
+  for f in input_api.AffectedFiles(file_filter=file_filter):
+    for line_num, line in f.ChangedContents():
+      match = input_api.re.search(action_re, line)
+      if match:
+        # Loads contents in tools/metrics/actions/actions.xml to memory. It's
+        # loaded only once.
+        if not current_actions:
+          with open('../../../tools/metrics/actions/actions.xml') as actions_f:
+            current_actions = actions_f.read()
+        # Search for the matched user action name in |current_actions|.
+        for action_name in match.groups():
+          action = 'name="{0}"'.format(action_name)
+          if action not in current_actions:
+            return [output_api.PresubmitPromptWarning(
+              'File %s line %d: %s is missing in '
+              'tools/metrics/actions/actions.xml. Please run '
+              'tools/metrics/actions/extract_actions.py to update.'
+              % (f.LocalPath(), line_num, action_name))]
+  return []
+
+def CheckChangeOnUpload(input_api, output_api):
+  return CheckUserActionUpdate(input_api, output_api)
+
+
+def CheckChangeOnCommit(input_api, output_api):
+  return CheckUserActionUpdate(input_api, output_api)