[Android] Add a configurable environment for devil/.

build/android/devil/android/md5sum.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 import posixpath
 import re
 
+from devil import devil_env
 from devil.android import device_errors
 from devil.utils import cmd_helper
-from pylib import constants
 
 MD5SUM_DEVICE_LIB_PATH = '/data/local/tmp/md5sum'
 MD5SUM_DEVICE_BIN_PATH = MD5SUM_DEVICE_LIB_PATH + '/md5sum_bin'
 
 _STARTS_WITH_CHECKSUM_RE = re.compile(r'^\s*[0-9a-fA-F]{32}\s+')
 
 
 def CalculateHostMd5Sums(paths):
   """Calculates the MD5 sum value for all items in |paths|.
 
   Directories are traversed recursively and the MD5 sum of each file found is
   reported in the result.
 
   Args:
     paths: A list of host paths to md5sum.
   Returns:
     A dict mapping file paths to their respective md5sum checksums.
   """
   if isinstance(paths, basestring):
     paths = [paths]
 
-  md5sum_bin_host_path = os.path.join(
-      constants.GetOutDirectory(), 'md5sum_bin_host')
+  md5sum_bin_host_path = devil_env.config.md5sum_host_path
   if not os.path.exists(md5sum_bin_host_path):
     raise IOError('File not built: %s' % md5sum_bin_host_path)
   out = cmd_helper.GetCmdOutput([md5sum_bin_host_path] + [p for p in paths])
 
   return _ParseMd5SumOutput(out.splitlines())
 
 
 def CalculateDeviceMd5Sums(paths, device):
   """Calculates the MD5 sum value for all items in |paths|.
 
   Directories are traversed recursively and the MD5 sum of each file found is
   reported in the result.
 
   Args:
     paths: A list of device paths to md5sum.
   Returns:
     A dict mapping file paths to their respective md5sum checksums.
   """
   if not paths:
     return {}
 
   if isinstance(paths, basestring):
     paths = [paths]
   # Allow generators
   paths = list(paths)
 
-  md5sum_dist_path = os.path.join(constants.GetOutDirectory(), 'md5sum_dist')
+  md5sum_dist_path = devil_env.config.md5sum_device_path
   md5sum_dist_bin_path = os.path.join(md5sum_dist_path, 'md5sum_bin')
 
   if not os.path.exists(md5sum_dist_path):
     raise IOError('File not built: %s' % md5sum_dist_path)
   md5sum_file_size = os.path.getsize(md5sum_dist_bin_path)
 
   # For better performance, make the script as small as possible to try and
   # avoid needing to write to an intermediary file (which RunShellCommand will
   # do if necessary).
   md5sum_script = 'a=%s;' % MD5SUM_DEVICE_BIN_PATH
@@ skipping 29 matching lines @@
       raise
 
   return _ParseMd5SumOutput(out)
 
 
 def _ParseMd5SumOutput(out):
   hash_and_path = (l.split(None, 1) for l in out
                    if l and _STARTS_WITH_CHECKSUM_RE.match(l))
   return dict((p, h) for h, p in hash_and_path)