Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1 | # Copyright 2014 the V8 project 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 | """ |
| 6 | |
| 7 | import os |
| 8 | import sys |
| 9 | |
| 10 | |
| 11 | def directory_really_is_depot_tools(directory): |
| 12 | return os.path.isfile(os.path.join(directory, 'gclient.py')) |
| 13 | |
| 14 | |
| 15 | def add_depot_tools_to_path(): |
| 16 | """Search for depot_tools and add it to sys.path.""" |
| 17 | # First look if depot_tools is already in PYTHONPATH. |
| 18 | for i in sys.path: |
| 19 | if i.rstrip(os.sep).endswith('depot_tools'): |
| 20 | if directory_really_is_depot_tools(i): |
| 21 | return i |
| 22 | |
| 23 | # Then look if depot_tools is in PATH, common case. |
| 24 | for i in os.environ['PATH'].split(os.pathsep): |
| 25 | if i.rstrip(os.sep).endswith('depot_tools'): |
| 26 | if directory_really_is_depot_tools(i): |
| 27 | sys.path.insert(0, 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 | if directory_really_is_depot_tools(os.path.join(root_dir, 'depot_tools')): |
| 34 | i = os.path.join(root_dir, 'depot_tools') |
| 35 | sys.path.insert(0, 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 |