#!/usr/bin/env python3
# #############################################################################
# Copyright (c) 2018-present    lzutao <taolzu(at)gmail.com>
# All rights reserved.
#
# This source code is licensed under both the BSD-style license (found in the
# LICENSE file in the root directory of this source tree) and the GPLv2 (found
# in the COPYING file in the root directory of this source tree).
# #############################################################################
import re


def find_version_tuple(filepath):
 version_file_data = None
 with open(filepath) as fd:
   version_file_data = fd.read()

 patterns = r"""#\s*define\s+ZSTD_VERSION_MAJOR\s+([0-9]+)
#\s*define\s+ZSTD_VERSION_MINOR\s+([0-9]+)
#\s*define\s+ZSTD_VERSION_RELEASE\s+([0-9]+)
"""
 regex = re.compile(patterns, re.MULTILINE)
 version_match = regex.search(version_file_data)
 if version_match:
   return version_match.groups()
 raise Exception("Unable to find version string")


def main():
 import argparse
 parser = argparse.ArgumentParser(description='Print zstd version from lib/zstd.h')
 parser.add_argument('file', help='path to lib/zstd.h')
 args = parser.parse_args()
 version_tuple = find_version_tuple(args.file)
 print('.'.join(version_tuple))


if __name__ == '__main__':
 main()