2 # Copyright 2011 The Chromium Authors
3 # Use of this source code is governed by a BSD-style license that can be
4 # found in the LICENSE file.
5 """Small utility function to find depot_tools and add it to the python path.
7 Will throw an ImportError exception if depot_tools can't be found since it
10 This can also be used as a standalone script to print out the depot_tools
20 SRC = os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir))
23 def IsRealDepotTools(path):
24 expanded_path = os.path.expanduser(path)
25 return os.path.isfile(os.path.join(expanded_path, 'gclient.py'))
28 def add_depot_tools_to_path():
29 """Search for depot_tools and add it to sys.path."""
30 # First, check if we have a DEPS'd in "depot_tools".
31 deps_depot_tools = os.path.join(SRC, 'third_party', 'depot_tools')
32 if IsRealDepotTools(deps_depot_tools):
33 # Put the pinned version at the start of the sys.path, in case there
34 # are other non-pinned versions already on the sys.path.
35 sys.path.insert(0, deps_depot_tools)
36 return deps_depot_tools
38 # Then look if depot_tools is already in PYTHONPATH.
40 if i.rstrip(os.sep).endswith('depot_tools') and IsRealDepotTools(i):
42 # Then look if depot_tools is in PATH, common case.
43 for i in os.environ['PATH'].split(os.pathsep):
44 if IsRealDepotTools(i):
45 sys.path.append(i.rstrip(os.sep))
47 # Rare case, it's not even in PATH, look upward up to root.
48 root_dir = os.path.dirname(os.path.abspath(__file__))
49 previous_dir = os.path.abspath(__file__)
50 while root_dir and root_dir != previous_dir:
51 i = os.path.join(root_dir, 'depot_tools')
52 if IsRealDepotTools(i):
55 previous_dir = root_dir
56 root_dir = os.path.dirname(root_dir)
57 print('Failed to find depot_tools', file=sys.stderr)
60 DEPOT_TOOLS_PATH = add_depot_tools_to_path()
62 # pylint: disable=W0611
67 if DEPOT_TOOLS_PATH is None:
69 print(DEPOT_TOOLS_PATH)
73 if __name__ == '__main__':