1#!/usr/bin/env python 2# 3# Copyright (C) 2020 The Android Open Source Project 4# 5# Licensed under the Apache License, Version 2.0 (the "License"); 6# you may not use this file except in compliance with the License. 7# You may obtain a copy of the License at 8# 9# http://www.apache.org/licenses/LICENSE-2.0 10# 11# Unless required by applicable law or agreed to in writing, software 12# distributed under the License is distributed on an "AS IS" BASIS, 13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14# See the License for the specific language governing permissions and 15# limitations under the License. 16# 17"""A tool for constructing class loader context.""" 18 19from __future__ import print_function 20 21import argparse 22import sys 23 24from manifest import compare_version_gt 25 26 27def parse_args(args): 28 """Parse commandline arguments.""" 29 parser = argparse.ArgumentParser() 30 parser.add_argument( 31 '--target-sdk-version', 32 default='', 33 dest='sdk', 34 help='specify target SDK version (as it appears in the manifest)') 35 parser.add_argument( 36 '--host-context-for-sdk', 37 dest='host_contexts', 38 action='append', 39 nargs=2, 40 metavar=('sdk', 'context'), 41 help='specify context on host for a given SDK version or "any" version') 42 parser.add_argument( 43 '--target-context-for-sdk', 44 dest='target_contexts', 45 action='append', 46 nargs=2, 47 metavar=('sdk', 'context'), 48 help='specify context on target for a given SDK version or "any" ' 49 'version' 50 ) 51 return parser.parse_args(args) 52 53 54# Special keyword that means that the context should be added to class loader 55# context regardless of the target SDK version. 56any_sdk = 'any' 57 58 59# We assume that the order of context arguments passed to this script is 60# correct (matches the order computed by package manager). It is possible to 61# sort them here, but Soong needs to use deterministic order anyway, so it can 62# as well use the correct order. 63def construct_context(versioned_contexts, target_sdk): 64 context = [] 65 for [sdk, ctx] in versioned_contexts: 66 if sdk == any_sdk or compare_version_gt(sdk, target_sdk): 67 context.append(ctx) 68 return context 69 70 71def construct_contexts(args): 72 host_context = construct_context(args.host_contexts, args.sdk) 73 target_context = construct_context(args.target_contexts, args.sdk) 74 context_sep = '#' 75 return ( 76 'class_loader_context_arg=--class-loader-context=PCL[]{%s} ; ' % 77 context_sep.join(host_context) + 78 'stored_class_loader_context_arg=--stored-class-loader-context=PCL[]{%s}' #pylint: disable=line-too-long 79 % context_sep.join(target_context)) 80 81 82def main(): 83 """Program entry point.""" 84 try: 85 args = parse_args(sys.argv[1:]) 86 if not args.sdk: 87 raise SystemExit('target sdk version is not set') 88 if not args.host_contexts: 89 args.host_contexts = [] 90 if not args.target_contexts: 91 args.target_contexts = [] 92 93 print(construct_contexts(args)) 94 95 # pylint: disable=broad-except 96 except Exception as err: 97 print('error: ' + str(err), file=sys.stderr) 98 sys.exit(-1) 99 100 101if __name__ == '__main__': 102 main() 103