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#!/usr/bin/python3
#
# Copyright (C) 2018 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.
#
"""Parse changelog and get either latest version or stable version.
"""
import os.path
import re
import sys
def main():
stable_version = False
if len(sys.argv) < 2 or len(sys.argv) > 3:
# Exit non-zero if input parameter format is wrong
print("""Input format is wrong.
usage: version_parser.py <changelog> [latest|stable]
return the corresponding version and write the corresponding changelog context in current directory""")
sys.exit(1)
elif len(sys.argv) == 3:
# 2nd input parameter is optional
# latest or stable, default is latest
if sys.argv[2].lower() == 'stable':
stable_version = True
changelog = sys.argv[1]
if not os.path.isfile(changelog):
print("changelog {} does not exist".format(changelog))
sys.exit(1)
file1 = open(changelog, 'r')
Lines = file1.readlines()
stable_version_list = []
version_list = []
context = ""
previous_version_stable = -1 # 0: unstable, 1: stable, -1: start state, no previous version
for line in Lines:
# parse cuttlefish-common/cuttlefish-frontend changelog
# sample line with keywords: cuttlefish-frontend (0.9.28) stable; urgency=medium
tokens = re.search(r'.*cuttlefish-[a-zA-Z]+ \((?P<version>.*)\) (?P<status>[a-zA-Z]+); .*', line)
if tokens:
version = tokens.group('version')
status = tokens.group('status')
if previous_version_stable == 0:
last_item = version_list.pop()
version_list.append((last_item, context))
elif previous_version_stable == 1:
last_item = stable_version_list.pop()
stable_version_list.append((last_item, context))
if status.lower() == 'stable':
stable_version_list.append(version)
previous_version_stable = 1
else:
version_list.append(version)
previous_version_stable = 0
context = ""
context = context + line
changelog = ""
if stable_version:
print(stable_version_list[0][0])
changelog = stable_version_list[0][1]
else:
print(version_list[0][0])
changelog = version_list[0][1]
with open("changelog", "a") as myfile:
myfile.write(changelog)
if __name__ == '__main__':
main()
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