[android] Stop using isolate.py for data dependency management.

build/android/pylib/utils/isolator.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 fnmatch
-import glob
-import os
-import shutil
-import sys
-import tempfile
-
-from devil.utils import cmd_helper
-from pylib import constants
-from pylib.constants import host_paths
-
-
-_ISOLATE_SCRIPT = os.path.join(
-    host_paths.DIR_SOURCE_ROOT, 'tools', 'swarming_client', 'isolate.py')
-
-
-def DefaultPathVariables():
-  return {
-    'DEPTH': host_paths.DIR_SOURCE_ROOT,
-    'PRODUCT_DIR': constants.GetOutDirectory(),
-  }
-
-
-def DefaultConfigVariables():
-  # Note: This list must match the --config-vars in build/isolate.gypi
-  return {
-    'CONFIGURATION_NAME': constants.GetBuildType(),
-    'OS': 'android',
-    'asan': '0',
-    'branding': 'Chromium',
-    'chromeos': '0',
-    'component': 'static_library',
-    'enable_pepper_cdms': '0',
-    'enable_plugins': '0',
-    'fastbuild': '0',
-    'icu_use_data_file_flag': '1',
-    'kasko': '0',
-    'lsan': '0',
-    'msan': '0',
-    # TODO(maruel): This may not always be true.
-    'target_arch': 'arm',
-    'tsan': '0',
-    'use_custom_libcxx': '0',
-    'use_instrumented_libraries': '0',
-    'use_prebuilt_instrumented_libraries': '0',
-    'use_ozone': '0',
-    'use_x11': '0',
-    'v8_use_external_startup_data': '1',
-    'msvs_version': '0',
-  }
-
-
-def IsIsolateEmpty(isolate_path):
-  """Returns whether there are no files in the .isolate."""
-  with open(isolate_path) as f:
-    return "'files': []" in f.read()
-
-
-class Isolator(object):
-  """Manages calls to isolate.py for the android test runner scripts."""
-
-  def __init__(self):
-    self._isolate_deps_dir = tempfile.mkdtemp()
-
-  @property
-  def isolate_deps_dir(self):
-    return self._isolate_deps_dir
-
-  def Clear(self):
-    """Deletes the isolate dependency directory."""
-    if os.path.exists(self._isolate_deps_dir):
-      shutil.rmtree(self._isolate_deps_dir)
-
-  def Remap(self, isolate_abs_path, isolated_abs_path,
-            path_variables=None, config_variables=None):
-    """Remaps data dependencies into |self._isolate_deps_dir|.
-
-    Args:
-      isolate_abs_path: The absolute path to the .isolate file, which specifies
-        data dependencies in the source tree.
-      isolated_abs_path: The absolute path to the .isolated file, which is
-        generated by isolate.py and specifies data dependencies in
-        |self._isolate_deps_dir| and their digests.
-      path_variables: A dict containing everything that should be passed
-        as a |--path-variable| to the isolate script. Defaults to the return
-        value of |DefaultPathVariables()|.
-      config_variables: A dict containing everything that should be passed
-        as a |--config-variable| to the isolate script. Defaults to the return
-        value of |DefaultConfigVariables()|.
-    Raises:
-      Exception if the isolate command fails for some reason.
-    """
-    if not path_variables:
-      path_variables = DefaultPathVariables()
-    if not config_variables:
-      config_variables = DefaultConfigVariables()
-
-    isolate_cmd = [
-      sys.executable, _ISOLATE_SCRIPT, 'remap',
-      '--isolate', isolate_abs_path,
-      '--isolated', isolated_abs_path,
-      '--outdir', self._isolate_deps_dir,
-    ]
-    for k, v in path_variables.iteritems():
-      isolate_cmd.extend(['--path-variable', k, v])
-    for k, v in config_variables.iteritems():
-      isolate_cmd.extend(['--config-variable', k, v])
-
-    exit_code, _ = cmd_helper.GetCmdStatusAndOutput(isolate_cmd)
-    if exit_code:
-      raise Exception('isolate command failed: %s' % ' '.join(isolate_cmd))
-
-  def VerifyHardlinks(self):
-    """Checks |isolate_deps_dir| for a hardlink.
-
-    Returns:
-      True if a hardlink is found.
-      False if nothing is found.
-    Raises:
-      Exception if a non-hardlink is found.
-    """
-    for root, _, filenames in os.walk(self._isolate_deps_dir):
-      if filenames:
-        linked_file = os.path.join(root, filenames[0])
-        orig_file = os.path.join(
-            self._isolate_deps_dir,
-            os.path.relpath(linked_file, self._isolate_deps_dir))
-        if os.stat(linked_file).st_ino == os.stat(orig_file).st_ino:
-          return True
-        else:
-          raise Exception('isolate remap command did not use hardlinks.')
-    return False
-
-  def PurgeExcluded(self, deps_exclusion_list):
-    """Deletes anything on |deps_exclusion_list| from |self._isolate_deps_dir|.
-
-    Args:
-      deps_exclusion_list: A list of globs to exclude from the isolate
-        dependency directory.
-    """
-    excluded_paths = (
-        x for y in deps_exclusion_list
-        for x in glob.glob(
-            os.path.abspath(os.path.join(self._isolate_deps_dir, y))))
-    for p in excluded_paths:
-      if os.path.isdir(p):
-        shutil.rmtree(p)
-      else:
-        os.remove(p)
-
-  @classmethod
-  def _DestructiveMerge(cls, src, dest):
-    if os.path.exists(dest) and os.path.isdir(dest):
-      for p in os.listdir(src):
-        cls._DestructiveMerge(os.path.join(src, p), os.path.join(dest, p))
-      os.rmdir(src)
-    else:
-      shutil.move(src, dest)
-
-
-  def MoveOutputDeps(self):
-    """Moves files from the output directory to the top level of
-      |self._isolate_deps_dir|.
-
-    Moves pak files from the output directory to to <isolate_deps_dir>/paks
-    Moves files from the product directory to <isolate_deps_dir>
-    """
-    # On Android, all pak files need to be in the top-level 'paks' directory.
-    paks_dir = os.path.join(self._isolate_deps_dir, 'paks')
-    os.mkdir(paks_dir)
-
-    deps_out_dir = os.path.join(
-        self._isolate_deps_dir,
-        os.path.relpath(os.path.join(constants.GetOutDirectory(), os.pardir),
-                        host_paths.DIR_SOURCE_ROOT))
-    for root, _, filenames in os.walk(deps_out_dir):
-      for filename in fnmatch.filter(filenames, '*.pak'):
-        shutil.move(os.path.join(root, filename), paks_dir)
-
-    # Move everything in PRODUCT_DIR to top level.
-    deps_product_dir = os.path.join(
-        deps_out_dir, os.path.basename(constants.GetOutDirectory()))
-    if os.path.isdir(deps_product_dir):
-      for p in os.listdir(deps_product_dir):
-        Isolator._DestructiveMerge(os.path.join(deps_product_dir, p),
-                                   os.path.join(self._isolate_deps_dir, p))
-      os.rmdir(deps_product_dir)
-      os.rmdir(deps_out_dir)