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Side by Side Diff: isolate/find_depot_tools.py

Issue 9148004: Add script to run a test in a separate read-only directory. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/tools/
Patch Set: Created 8 years, 11 months ago
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1 # Copyright (c) 2012 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
6 Will throw an ImportError exception if depot_tools can't be found since it
7 imports breakpad.
8 """
9
10 import os
11 import sys
12
13 def add_depot_tools_to_path():
14 """Search for depot_tools and add it to sys.path."""
15 # First look if depot_tools is already in PYTHONPATH.
16 for i in sys.path:
17 if i.endswith('depot_tools'):
18 return
19 # Then look if depot_tools is in PATH, common case.
20 for i in os.environ['PATH'].split(os.pathsep):
21 if i.rstrip(os.sep).endswith('depot_tools'):
22 sys.path.append(i.rstrip(os.sep))
23 return
24 # Rare case, it's not even in PATH, look upward up to root.
25 root_dir = os.path.dirname(os.path.abspath(__file__))
26 while root_dir:
27 if os.path.isfile(os.path.join(root_dir, 'depot_tools', 'breakpad.py')):
28 sys.path.append(os.path.join(root_dir, 'depot_tools'))
29 return
30 root_dir = os.path.dirname(root_dir)
31 print >> sys.stderr, 'Failed to find depot_tools'
32
33 add_depot_tools_to_path()
34
35 # pylint: disable=W0611
36 import breakpad
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