#!/usr/bin/env python
#
# 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.

"""Generates the obfuscated jar and test jar for an apk.

If proguard is not enabled or 'Release' is not in the configuration name,
obfuscation will be a no-op.
"""

import optparse
import os
import sys

from util import build_utils

def ParseArgs(argv):
  parser = optparse.OptionParser()
  parser.add_option('--android-sdk', help='path to the Android SDK folder')
  parser.add_option('--android-sdk-tools',
                    help='path to the Android SDK build tools folder')
  parser.add_option('--android-sdk-jar',
                    help='path to Android SDK\'s android.jar')
  parser.add_option('--proguard-jar-path',
                    help='Path to proguard.jar in the sdk')
  parser.add_option('--input-jars-paths',
                    help='Path to jars to include in obfuscated jar')

  parser.add_option('--proguard-configs',
                    help='Paths to proguard config files')

  parser.add_option('--configuration-name',
                    help='Gyp configuration name (i.e. Debug, Release)')
  parser.add_option('--proguard-enabled', action='store_true',
                    help='Set if proguard is enabled for this target.')

  parser.add_option('--obfuscated-jar-path',
                    help='Output path for obfuscated jar.')

  parser.add_option('--testapp', action='store_true',
                    help='Set this if building an instrumentation test apk')
  parser.add_option('--tested-apk-obfuscated-jar-path',
                    help='Path to obfusctated jar of the tested apk')
  parser.add_option('--test-jar-path',
                    help='Output path for jar containing all the test apk\'s '
                    'code.')

  parser.add_option('--stamp', help='File to touch on success')

  (options, args) = parser.parse_args(argv)

  if args:
    parser.error('No positional arguments should be given. ' + str(args))

  # Check that required options have been provided.
  required_options = (
      'android_sdk',
      'android_sdk_tools',
      'android_sdk_jar',
      'proguard_jar_path',
      'input_jars_paths',
      'configuration_name',
      'obfuscated_jar_path',
      )

  if options.testapp:
    required_options += (
        'test_jar_path',
        )

  build_utils.CheckOptions(options, parser, required=required_options)

  return options, args


def main(argv):
  options, _ = ParseArgs(argv)

  library_classpath = [options.android_sdk_jar]
  input_jars = build_utils.ParseGypList(options.input_jars_paths)

  dependency_class_filters = [
      '*R.class', '*R$*.class', '*Manifest.class', '*BuildConfig.class']

  if options.testapp:
    build_utils.MergeZips(
        options.test_jar_path, input_jars, dependency_class_filters)

  if options.configuration_name == 'Release' and options.proguard_enabled:
    proguard_cmd = [
        'java', '-jar', options.proguard_jar_path,
        '-forceprocessing',
        '-libraryjars', ':'.join(library_classpath),
        '-dump', options.obfuscated_jar_path + '.dump',
        '-printseeds', options.obfuscated_jar_path + '.seeds',
        '-printusage', options.obfuscated_jar_path + '.usage',
        '-printmapping', options.obfuscated_jar_path + '.mapping',
        ]

    exclude_paths = []
    configs = build_utils.ParseGypList(options.proguard_configs)
    if (options.tested_apk_obfuscated_jar_path and
        options.tested_apk_obfuscated_jar_path != '/'):
      # configs should only contain the process_resources.py generated config.
      assert len(configs) == 1, (
          'test apks should not have custom proguard configs: ' + str(configs))
      tested_jar_info = build_utils.ReadJson(
          options.tested_apk_obfuscated_jar_path + '.info')
      exclude_paths = tested_jar_info['inputs']
      configs = tested_jar_info['configs']
      proguard_cmd += [
          '-dontobfuscate',
          '-dontoptimize',
          '-dontshrink',
          '-dontskipnonpubliclibraryclassmembers',
          '-libraryjars', options.tested_apk_obfuscated_jar_path,
          '-applymapping', options.tested_apk_obfuscated_jar_path + '.mapping',
          ]

    proguard_injars = [p for p in input_jars if p not in exclude_paths]
    proguard_cmd += ['-injars', ':'.join(proguard_injars)]

    for config_file in configs:
      proguard_cmd += ['-include', config_file]

    # The output jar must be specified after inputs.
    proguard_cmd += ['-outjars', options.obfuscated_jar_path]

    build_utils.CheckOutput(proguard_cmd)

    this_info = {
      'inputs': proguard_injars,
      'configs': configs
    }

    build_utils.WriteJson(
        this_info, options.obfuscated_jar_path + '.info')
  else:
    output_files = [
        options.obfuscated_jar_path,
        options.obfuscated_jar_path + '.info',
        options.obfuscated_jar_path + '.dump',
        options.obfuscated_jar_path + '.seeds',
        options.obfuscated_jar_path + '.usage',
        options.obfuscated_jar_path + '.mapping']
    for f in output_files:
      if os.path.exists(f):
        os.remove(f)
      build_utils.Touch(f)

  if options.stamp:
    build_utils.Touch(options.stamp)

if __name__ == '__main__':
  sys.exit(main(sys.argv[1:]))