Add safely-roll-webkit.py to streamline webkit rolls.

It still needs some work on the commit queue side to work correctly, at the
moment it will deny the commit because there is no LGTM.


Review URL: http://codereview.chromium.org/7089012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@93945 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 38 insertions, 0 deletions

diff --git a/tools/find_depot_tools.py b/tools/find_depot_tools.py
new file mode 100644
index 0000000..4647738
--- /dev/null
+++ b/tools/find_depot_tools.py
@@ -0,0 +1,38 @@
+# Copyright (c) 2011 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.
+"""Small utility function to find depot_tools and add it to the python path.
+
+Will throw an ImportError exception if depot_tools can't be found since it
+imports breakpad.
+"""
+
+import os
+import sys
+
+def add_depot_tools_to_path():
+  """Search for depot_tools and add it to sys.path."""
+  # First look if depot_tools is already in PYTHONPATH.
+  for i in sys.path:
+    if i.rstrip(os.sep).endswith('depot_tools'):
+      return i
+  # Then look if depot_tools is in PATH, common case.
+  for i in os.environ['PATH'].split(os.pathsep):
+    if i.rstrip(os.sep).endswith('depot_tools'):
+      sys.path.append(i.rstrip(os.sep))
+      return i
+  # Rare case, it's not even in PATH, look upward up to root.
+  root_dir = os.path.dirname(os.path.abspath(__file__))
+  while root_dir:
+    if os.path.isfile(os.path.join(root_dir, 'depot_tools', 'breakpad.py')):
+      i = os.path.join(root_dir, 'depot_tools')
+      sys.path.append(i)
+      return i
+    root_dir = os.path.dirname(root_dir)
+  print >> sys.stderr, 'Failed to find depot_tools'
+  return None
+
+add_depot_tools_to_path()
+
+# pylint: disable=W0611
+import breakpad