1# Copyright (c) 2011 The Chromium Authors. All rights reserved.
2# Use of this source code is governed by a BSD-style license that can be
3# found in the LICENSE file.
4"""Small utility function to find depot_tools and add it to the python path.
5
6Will throw an ImportError exception if depot_tools can't be found since it
7imports breakpad.
8"""
9
10import os
11import sys
12
13
14def IsRealDepotTools(path):
15  return os.path.isfile(os.path.join(path, 'gclient'))
16
17
18def add_depot_tools_to_path():
19  """Search for depot_tools and add it to sys.path."""
20  # First look if depot_tools is already in PYTHONPATH.
21  for i in sys.path:
22    if i.rstrip(os.sep).endswith('depot_tools') and IsRealDepotTools(i):
23      return i
24  # Then look if depot_tools is in PATH, common case.
25  for i in os.environ['PATH'].split(os.pathsep):
26    if IsRealDepotTools(i):
27      sys.path.append(i.rstrip(os.sep))
28      return i
29  # Rare case, it's not even in PATH, look upward up to root.
30  root_dir = os.path.dirname(os.path.abspath(__file__))
31  previous_dir = os.path.abspath(__file__)
32  while root_dir and root_dir != previous_dir:
33    i = os.path.join(root_dir, 'depot_tools')
34    if IsRealDepotTools(i):
35      sys.path.append(i)
36      return i
37    previous_dir = root_dir
38    root_dir = os.path.dirname(root_dir)
39  print >> sys.stderr, 'Failed to find depot_tools'
40  return None
41
42add_depot_tools_to_path()
43
44# pylint: disable=W0611
45import breakpad
46