blob: db3ffa224c422f04ae5c5572587d703a495e9b61 [file] [log] [blame]
# Copyright 2014 the V8 project 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.
# for py2/py3 compatibility
from __future__ import print_function
import os
import sys
def directory_really_is_depot_tools(directory):
return os.path.isfile(os.path.join(directory, ''))
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'):
if directory_really_is_depot_tools(i):
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'):
if directory_really_is_depot_tools(i):
sys.path.insert(0, 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__))
previous_dir = os.path.abspath(__file__)
while root_dir and root_dir != previous_dir:
if directory_really_is_depot_tools(os.path.join(root_dir, 'depot_tools')):
i = os.path.join(root_dir, 'depot_tools')
sys.path.insert(0, i)
return i
previous_dir = root_dir
root_dir = os.path.dirname(root_dir)
print('Failed to find depot_tools', file=sys.stderr)
return None