Add PRESUBMIT.py file to net/websockets

net/websockets/PRESUBMIT.py

Index: net/websockets/PRESUBMIT.py
diff --git a/net/websockets/PRESUBMIT.py b/net/websockets/PRESUBMIT.py
new file mode 100644
index 0000000000000000000000000000000000000000..1da441cb75761eccddf9e09a82e66724f5ccc0cb
--- /dev/null
+++ b/net/websockets/PRESUBMIT.py
@@ -0,0 +1,57 @@
+# 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.
+
+"""Chromium presubmit script for src/net/websockets.
+
+See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
+for more details on the presubmit API built into gcl.
+"""
+
+
+# TODO(ricea): Remove this once the old implementation has been removed and the
+# list of files in the README file is no longer needed.
+def _CheckReadMeComplete(input_api, output_api):
+  """Verifies that any new files have been added to the README file.
+
+  Checks that if any source files were added in this CL, that they were
+  also added to the README file. We do not warn about pre-existing
+  errors, as that would be annoying.
+
+  Args:
+      input_api: The InputApi object provided by the presubmit framework.
+      output_api: The OutputApi object provided by the framework.
+
+  Returns:
+      A list of zero or more PresubmitPromptWarning objects.
+  """
+  # None passed to AffectedSourceFiles means "use the default filter", which
+  # does what we want, ie. returns files in the CL with filenames that look like
+  # source code.
+  added_source_filenames = set(input_api.basename(af.LocalPath())
+                               for af in input_api.AffectedSourceFiles(None)
+                               if af.Action().startswith('A'))
+  if not added_source_filenames:
+    return []
+  readme = input_api.AffectedSourceFiles(
+      lambda af: af.LocalPath().endswith('/README'))
+  if not readme:
+    return [output_api.PresubmitPromptWarning(
+        'One or more files were added to net/websockets without being added\n'
+        'to net/websockets/README.\n', added_source_filenames)]
+  readme_added_filenames = set(line.strip() for line in readme[0].NewContents()
+                               if line.strip() in added_source_filenames)
+  if readme_added_filenames < added_source_filenames:
+    return [output_api.PresubmitPromptWarning(
+        'One or more files added to net/websockets but not found in the README '
+        'file.\n', added_source_filenames - readme_added_filenames)]
+  else:
+    return []
+
+
+def CheckChangeOnUpload(input_api, output_api):
+  return _CheckReadMeComplete(input_api, output_api)
+
+
+def CheckChangeOnCommit(input_api, output_api):
+  return _CheckReadMeComplete(input_api, output_api)