#!/usr/bin/env python
# Copyright (C) 2015 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.

from __future__ import print_function
import collections
import sys
import zipfile

if len(sys.argv) < 3:
    print('usage: %s <out.zip> <in.zip>...' % sys.argv[0], file=sys.stderr)
    exit(1)

outfile = sys.argv[1]
infiles = sys.argv[2:]
seen = set()
SERVICES = 'META-INF/services/'

try:
    with zipfile.ZipFile(outfile, 'w') as outzip:
        services = collections.defaultdict(lambda: '')
        for infile in infiles:
            with zipfile.ZipFile(infile) as inzip:
                for info in inzip.infolist():
                    n = info.filename
                    if n in seen:
                        continue
                    elif n.startswith(SERVICES):
                        # Concatenate all provider configuration files.
                        services[n] += inzip.read(n).decode("UTF-8")
                        continue
                    outzip.writestr(info, inzip.read(n))
                    seen.add(n)

        for n, v in list(services.items()):
            outzip.writestr(n, v)
except Exception as err:
    exit('Failed to merge jars: %s' % err)