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path: root/catapult/devil/devil/android/sdk/build_tools.py
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# Copyright 2015 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

from devil import devil_env
from devil.utils import lazy

with devil_env.SysPath(devil_env.DEPENDENCY_MANAGER_PATH):
  import dependency_manager  # pylint: disable=import-error


def GetPath(build_tool):
  try:
    return devil_env.config.LocalPath(build_tool)
  except dependency_manager.NoPathFoundError:
    pass

  try:
    return _PathInLocalSdk(build_tool)
  except dependency_manager.NoPathFoundError:
    pass

  return devil_env.config.FetchPath(build_tool)


def _PathInLocalSdk(build_tool):
  build_tools_path = _build_tools_path.read()
  return (os.path.join(build_tools_path, build_tool) if build_tools_path
          else None)


def _FindBuildTools():
  android_sdk_path = devil_env.config.LocalPath('android_sdk')
  if not android_sdk_path:
    return None

  build_tools_contents = os.listdir(
      os.path.join(android_sdk_path, 'build-tools'))

  if not build_tools_contents:
    return None
  else:
    if len(build_tools_contents) > 1:
      build_tools_contents.sort()
    return os.path.join(android_sdk_path, 'build-tools',
                        build_tools_contents[-1])


_build_tools_path = lazy.WeakConstant(_FindBuildTools)