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# Copyright 2015 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Checks for proguard configuration rules that cannot be combined across libs.
The only valid proguard arguments for a library are -keep, -assumenosideeffects,
and -dontnote and -dontwarn and -checkdiscard when they are provided with
arguments.
"""
import re
import sys
from third_party.py import gflags
gflags.DEFINE_string('path', None, 'Path to the proguard config to validate')
gflags.DEFINE_string('output', None, 'Where to put the validated config')
FLAGS = gflags.FLAGS
PROGUARD_COMMENTS_PATTERN = '#.*(\n|$)'
def main():
with open(FLAGS.path) as config:
config_string = config.read()
invalid_configs = Validate(config_string)
if invalid_configs:
raise RuntimeError('Invalid proguard config parameters: '
+ str(invalid_configs))
with open(FLAGS.output, 'w+') as outconfig:
config_string = ('# Merged from %s \n' % FLAGS.path) + config_string
outconfig.write(config_string)
def Validate(config):
"""Checks the config for illegal arguments."""
config = re.sub(PROGUARD_COMMENTS_PATTERN, '', config)
args = config.split('-')
invalid_configs = []
for arg in args:
arg = arg.strip()
if not arg:
continue
elif arg.startswith('checkdiscard'):
continue
elif arg.startswith('keep'):
continue
elif arg.startswith('assumenosideeffects'):
continue
elif arg.split()[0] == 'dontnote':
if len(arg.split()) > 1:
continue
elif arg.split()[0] == 'dontwarn':
if len(arg.split()) > 1:
continue
invalid_configs.append('-' + arg.split()[0])
return invalid_configs
if __name__ == '__main__':
FLAGS(sys.argv)
main()
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