[Android][DO NOT COMMIT] Testing push improvements.

build/android/pylib/utils/md5sum.py

Index: build/android/pylib/utils/md5sum.py
diff --git a/build/android/pylib/utils/md5sum.py b/build/android/pylib/utils/md5sum.py
new file mode 100644
index 0000000000000000000000000000000000000000..9ab739873c338563aaf0c97669c16ab356afd136
--- /dev/null
+++ b/build/android/pylib/utils/md5sum.py
@@ -0,0 +1,89 @@
+
+import collections
+import logging
+import os
+import tempfile
+import types
+
+from pylib import cmd_helper
+from pylib import constants
+from pylib.utils import device_temp_file
+
+HashAndPath = collections.namedtuple('HashAndPath', ['hash', 'path'])
+
+MD5SUM_DEVICE_LIB_PATH = '/data/local/tmp/md5sum/'
+MD5SUM_DEVICE_BIN_PATH = MD5SUM_DEVICE_LIB_PATH + 'md5sum_bin'
+
+# TODO(jbudorick): Consider having something to fall back on if test isn't available.
+MD5SUM_DEVICE_SCRIPT_FORMAT = (
+    'test -f {path} -o -d {path} '
+    '&& LD_LIBRARY_PATH={md5sum_lib} {md5sum_bin} {path}')
+
+
+def CalculateHostMd5Sums(paths):
+  logging.info('md5sum.CalculateHostMd5Sums(%s)' % str(paths))
+
+  if not isinstance(paths, list):
+    paths = [paths]
+  out = cmd_helper.GetCmdOutput(
+      [os.path.join(constants.GetOutDirectory(), 'md5sum_bin_host')] + paths)
+  return [HashAndPath(*l.split(None, 1)) for l in out.splitlines()]
+
+
+def CalculateDeviceMd5Sums(paths, device):
+  """Calculates the MD5 sum value for all items in |paths|.
+  """
+  if isinstance(paths, types.GeneratorType):
+    paths = list(paths)
+  elif not isinstance(paths, list):
+    paths = [paths]
+
+  if not device.FileExists(MD5SUM_DEVICE_BIN_PATH):
+    device.adb.Push(
+        os.path.join(constants.GetOutDirectory(), 'md5sum_dist'),
+        MD5SUM_DEVICE_LIB_PATH)
+
+  return _CalculateDeviceMd5SumsPrecheckExistence(paths, device)
+
+
+def _CalculateDeviceMd5SumsIndividually(paths, device):
+  out = []
+  with tempfile.NamedTemporaryFile() as md5sum_script_file:
+    with device_temp_file.DeviceTempFile(device) as md5sum_device_script_file:
+      md5sum_script = (
+          MD5SUM_DEVICE_SCRIPT_FORMAT.format(
+              path=p, md5sum_lib=MD5SUM_DEVICE_LIB_PATH,
+              md5sum_bin=MD5SUM_DEVICE_BIN_PATH)
+          for p in paths)
+      md5sum_script_file.write('; '.join(md5sum_script))
+      md5sum_script_file.flush()
+      device.adb.Push(md5sum_script_file.name, md5sum_device_script_file.name)
+      out = device.RunShellCommand(['sh', md5sum_device_script_file.name])
+
+  return [HashAndPath(*l.split(None, 1)) for l in out]
+
+
+def _CalculateDeviceMd5SumsPrecheckExistence(paths, device):
+  e = 'test -f {path} -o -d {path} && echo {path}'
+
+  with tempfile.NamedTemporaryFile() as exists_script_file:
+    exists_script = (e.format(path=p) for p in paths)
+    exists_script_file.write('; '.join(exists_script))
+    exists_script_file.flush()
+    with device_temp_file.DeviceTempFile(device) as exists_device_script_file:
+      device.adb.Push(exists_script_file.name, exists_device_script_file.name)
+      paths = device.RunShellCommand(['sh', exists_device_script_file.name])
+
+  if not paths:
+    return []
+
+  out = []
+  with tempfile.NamedTemporaryFile() as md5sum_script_file:
+    md5sum_script = ('LD_LIBRARY_PATH=%s %s %s' % (MD5SUM_DEVICE_LIB_PATH, MD5SUM_DEVICE_BIN_PATH, ' '.join(paths)))
+    md5sum_script_file.write(md5sum_script)
+    md5sum_script_file.flush()
+    with device_temp_file.DeviceTempFile(device) as md5sum_device_script_file:
+      device.adb.Push(md5sum_script_file.name, md5sum_device_script_file.name)
+      out = device.RunShellCommand(['sh', md5sum_device_script_file.name])
+
+  return [HashAndPath(*l.split(None, 1)) for l in out]