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#!/usr/bin/env python
#
# Copyright (C) 2021 The Android Open Source Project
#
# 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.
"""
Generate a set of signature patterns from the modular flags generated by a
bootclasspath_fragment that can be used to select a subset of monolithic flags
against which the modular flags can be compared.
"""
import argparse
import csv
def dict_reader(input):
return csv.DictReader(input, delimiter=',', quotechar='|', fieldnames=['signature'])
def produce_patterns_from_file(file):
with open(file, 'r') as f:
return produce_patterns_from_stream(f)
def produce_patterns_from_stream(stream):
# Read in all the signatures into a list and remove member names.
patterns = set()
for row in dict_reader(stream):
signature = row['signature']
text = signature.removeprefix("L")
# Remove the class specific member signature
pieces = text.split(";->")
qualifiedClassName = pieces[0]
# Remove inner class names as they cannot be separated from the containing outer class.
pieces = qualifiedClassName.split("$", maxsplit=1)
pattern = pieces[0]
patterns.add(pattern)
patterns = list(patterns)
patterns.sort()
return patterns
def main(args):
args_parser = argparse.ArgumentParser(description='Generate a set of signature patterns that select a subset of monolithic hidden API files.')
args_parser.add_argument('--flags', help='The stub flags file which contains an entry for every dex member')
args_parser.add_argument('--output', help='Generated signature prefixes')
args = args_parser.parse_args(args)
# Read in all the patterns into a list.
patterns = produce_patterns_from_file(args.flags)
# Write out all the patterns.
with open(args.output, 'w') as outputFile:
for pattern in patterns:
outputFile.write(pattern)
outputFile.write("\n")
if __name__ == "__main__":
main(sys.argv[1:])
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