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How to use md5sum method in fMBT

Best Python code snippet using fMBT_python

md5sum.py

Source:md5sum.py

1# Copyright 2014 The Chromium Authors. All rights reserved.2# Use of this source code is governed by a BSD-style license that can be3# found in the LICENSE file.4import os5import posixpath6import re7from devil import devil_env8from devil.android import device_errors9from devil.utils import cmd_helper10MD5SUM_DEVICE_LIB_PATH = '/data/local/tmp/md5sum'11MD5SUM_DEVICE_BIN_PATH = MD5SUM_DEVICE_LIB_PATH + '/md5sum_bin'12_STARTS_WITH_CHECKSUM_RE = re.compile(r'^\s*[0-9a-fA-F]{32}\s+')13def CalculateHostMd5Sums(paths):14  """Calculates the MD5 sum value for all items in |paths|.15  Directories are traversed recursively and the MD5 sum of each file found is16  reported in the result.17  Args:18    paths: A list of host paths to md5sum.19  Returns:20    A dict mapping file paths to their respective md5sum checksums.21  """22  if isinstance(paths, basestring):23    paths = [paths]24  md5sum_bin_host_path = devil_env.config.FetchPath('md5sum_host')25  if not os.path.exists(md5sum_bin_host_path):26    raise IOError('File not built: %s' % md5sum_bin_host_path)27  out = cmd_helper.GetCmdOutput(28    [md5sum_bin_host_path] + [os.path.realpath(p) for p in paths])29  return _ParseMd5SumOutput(out.splitlines())30def CalculateDeviceMd5Sums(paths, device):31  """Calculates the MD5 sum value for all items in |paths|.32  Directories are traversed recursively and the MD5 sum of each file found is33  reported in the result.34  Args:35    paths: A list of device paths to md5sum.36  Returns:37    A dict mapping file paths to their respective md5sum checksums.38  """39  if not paths:40    return {}41  if isinstance(paths, basestring):42    paths = [paths]43  # Allow generators44  paths = list(paths)45  md5sum_dist_path = devil_env.config.FetchPath('md5sum_device', device=device)46  if os.path.isdir(md5sum_dist_path):47    md5sum_dist_bin_path = os.path.join(md5sum_dist_path, 'md5sum_bin')48  else:49    md5sum_dist_bin_path = md5sum_dist_path50  if not os.path.exists(md5sum_dist_path):51    raise IOError('File not built: %s' % md5sum_dist_path)52  md5sum_file_size = os.path.getsize(md5sum_dist_bin_path)53  # For better performance, make the script as small as possible to try and54  # avoid needing to write to an intermediary file (which RunShellCommand will55  # do if necessary).56  md5sum_script = 'a=%s;' % MD5SUM_DEVICE_BIN_PATH57  # Check if the binary is missing or has changed (using its file size as an58  # indicator), and trigger a (re-)push via the exit code.59  md5sum_script += '! [[ $(ls -l $a) = *%d* ]]&&exit 2;' % md5sum_file_size60  # Make sure it can find libbase.so61  md5sum_script += 'export LD_LIBRARY_PATH=%s;' % MD5SUM_DEVICE_LIB_PATH62  if len(paths) > 1:63    prefix = posixpath.commonprefix(paths)64    if len(prefix) > 4:65      md5sum_script += 'p="%s";' % prefix66      paths = ['$p"%s"' % p[len(prefix):] for p in paths]67  md5sum_script += ';'.join('$a %s' % p for p in paths)68  # Don't fail the script if the last md5sum fails (due to file not found)69  # Note: ":" is equivalent to "true".70  md5sum_script += ';:'71  try:72    out = device.RunShellCommand(73        md5sum_script, shell=True, check_return=True, large_output=True)74  except device_errors.AdbShellCommandFailedError as e:75    # Push the binary only if it is found to not exist76    # (faster than checking up-front).77    if e.status == 2:78      # If files were previously pushed as root (adbd running as root), trying79      # to re-push as non-root causes the push command to report success, but80      # actually fail. So, wipe the directory first.81      device.RunShellCommand(['rm', '-rf', MD5SUM_DEVICE_LIB_PATH],82                             as_root=True, check_return=True)83      if os.path.isdir(md5sum_dist_path):84        device.adb.Push(md5sum_dist_path, MD5SUM_DEVICE_LIB_PATH)85      else:86        mkdir_cmd = 'a=%s;[[ -e $a ]] || mkdir $a' % MD5SUM_DEVICE_LIB_PATH87        device.RunShellCommand(mkdir_cmd, shell=True, check_return=True)88        device.adb.Push(md5sum_dist_bin_path, MD5SUM_DEVICE_BIN_PATH)89      out = device.RunShellCommand(90          md5sum_script, shell=True, check_return=True, large_output=True)91    else:92      raise93  return _ParseMd5SumOutput(out)94def _ParseMd5SumOutput(out):95  hash_and_path = (l.split(None, 1) for l in out96                   if l and _STARTS_WITH_CHECKSUM_RE.match(l))...

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