Extension docs build script, gyp target and PRESUBMIT.PY check

chrome/common/extensions/PRESUBMIT.PY

+#!/usr/bin/python2.4
+# Copyright 2009, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import os
+
+_dependent_dirs = set([
+  "chrome/common/extensions/api",
+  "chrome/common/extensions/docs/build",
+  "chrome/common/extensions/docs/js",
+  "chrome/common/extensions/docs/static",
+  "chrome/common/extensions/docs/template",
+]);
+
+_rebuild_warning = """
+This change modifies file(s) which the extension docs depend on. You must
+rebuild the extension docs. 
+
+Build by running the 'extension_docs' build target.
+
+Be sure to include any modified resulting static file
+(/common/extension/docs/*.html) in your final CL. 
+"""
+
+def CheckChange(input_api, output_api):
+  for f in input_api.AffectedFiles():
+    dir = os.path.dirname(f.LocalPath())
+    if (dir in _dependent_dirs):
+      return [output_api.PresubmitPromptWarning(_rebuild_warning)]
+  return []
+
+def CheckChangeOnUpload(input_api, output_api):
+  return CheckChange(input_api, output_api)
+
+def CheckChangeOnCommit(input_api, output_api):
+  return CheckChange(input_api, output_api)