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#!/usr/bin/env python
#
# 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 argparse
import sys
import tempfile
import zipfile
from util import build_utils
def _ParseArgs():
parser = argparse.ArgumentParser()
build_utils.AddDepfileOption(parser)
parser.add_argument('--shrinked-android-path', required=True,
help='Path to shrinkedAndroid.jar')
parser.add_argument('--dx-path', required=True,
help='Path to dx.jar')
parser.add_argument('--main-dex-rules-path', action='append', default=[],
dest='main_dex_rules_paths',
help='A file containing a list of proguard rules to use '
'in determining the class to include in the '
'main dex.')
parser.add_argument('--main-dex-list-path', required=True,
help='The main dex list file to generate.')
parser.add_argument(
'--class-inputs',
action='append',
help='GN-list of .jars with .class files.')
parser.add_argument(
'--class-inputs-filearg',
action='append',
help='GN-list of .jars with .class files (added to depfile).')
parser.add_argument(
'--r8-path', required=True, help='Path to the r8 executable.')
parser.add_argument('--negative-main-dex-globs',
help='GN-list of globs of .class names (e.g. org/chromium/foo/Bar.class) '
'that will fail the build if they match files in the main dex.')
args = parser.parse_args(build_utils.ExpandFileArgs(sys.argv[1:]))
args.class_inputs = build_utils.ParseGnList(args.class_inputs)
args.class_inputs_filearg = build_utils.ParseGnList(args.class_inputs_filearg)
args.class_inputs += args.class_inputs_filearg
if args.negative_main_dex_globs:
args.negative_main_dex_globs = build_utils.ParseGnList(
args.negative_main_dex_globs)
return args
def main():
args = _ParseArgs()
proguard_cmd = [
build_utils.JAVA_PATH,
'-jar',
args.r8_path,
'--classfile',
'--lib',
args.shrinked_android_path,
]
for m in args.main_dex_rules_paths:
proguard_cmd.extend(['--pg-conf', m])
proguard_flags = [
'-forceprocessing',
'-dontwarn',
'-dontoptimize',
'-dontobfuscate',
'-dontpreverify',
]
if args.negative_main_dex_globs:
for glob in args.negative_main_dex_globs:
# Globs come with 1 asterix, but we want 2 to match subpackages.
proguard_flags.append('-checkdiscard class ' +
glob.replace('*', '**').replace('/', '.'))
main_dex_list = ''
try:
with tempfile.NamedTemporaryFile(suffix='.jar') as temp_jar:
# Step 1: Use R8 to find all @MainDex code, and all code reachable
# from @MainDex code (recursive).
proguard_cmd += ['--output', temp_jar.name]
with tempfile.NamedTemporaryFile() as proguard_flags_file:
for flag in proguard_flags:
proguard_flags_file.write(flag + '\n')
proguard_flags_file.flush()
proguard_cmd += ['--pg-conf', proguard_flags_file.name]
for injar in args.class_inputs:
proguard_cmd.append(injar)
build_utils.CheckOutput(proguard_cmd, print_stderr=False)
# Record the classes kept by ProGuard. Not used by the build, but useful
# for debugging what classes are kept by ProGuard vs. MainDexListBuilder.
with zipfile.ZipFile(temp_jar.name) as z:
kept_classes = [p for p in z.namelist() if p.endswith('.class')]
with open(args.main_dex_list_path + '.partial', 'w') as f:
f.write('\n'.join(kept_classes) + '\n')
# Step 2: Expand inclusion list to all classes referenced by the .class
# files of kept classes (non-recursive).
main_dex_list_cmd = [
build_utils.JAVA_PATH,
'-cp',
args.dx_path,
'com.android.multidex.MainDexListBuilder',
# This workaround increases main dex size and does not seem to
# be needed by Chrome. See comment in the source:
# https://android.googlesource.com/platform/dalvik/+/master/dx/src/com/android/multidex/MainDexListBuilder.java
'--disable-annotation-resolution-workaround',
temp_jar.name,
':'.join(args.class_inputs)
]
main_dex_list = build_utils.CheckOutput(main_dex_list_cmd)
except build_utils.CalledProcessError as e:
if 'output jar is empty' in e.output:
pass
elif "input doesn't contain any classes" in e.output:
pass
else:
raise
with build_utils.AtomicOutput(args.main_dex_list_path) as f:
f.write(main_dex_list)
if args.depfile:
build_utils.WriteDepfile(
args.depfile,
args.main_dex_list_path,
inputs=args.class_inputs_filearg,
add_pydeps=False)
if __name__ == '__main__':
main()
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