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#
# OpenVPN -- An application to securely tunnel IP networks
# over a single UDP port, with support for SSL/TLS-based
# session authentication and key exchange,
# packet encryption, packet authentication, and
# packet compression.
#
# Copyright (C) 2022-2023 OpenVPN Inc <sales@openvpn.net>
# Copyright (C) 2022-2022 Lev Stipakov <lev@lestisoftware.fi>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2
# as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Usage: ./parse-version.m4.py m4file [directory]
# Read <m4file>, extract all lines looking like M4 define(), and translate
# them into CMake style set(). Those are then written out to file
# <directory>/version.cmake.
# Intended to be used on top-level version.m4 file.
import os
import re
import sys
def main():
assert len(sys.argv) > 1
version_path = sys.argv[1]
output = []
with open(version_path, 'r') as version_file:
for line in version_file:
match = re.match(r'[ \t]*define\(\[(.*)\],[ \t]*\[(.*)\]\)[ \t]*', line)
if match is not None:
output.append(match.expand(r'set(\1 \2)'))
out_path = os.path.join("%s" % (sys.argv[2] if len(sys.argv) > 2 else "."), "version.cmake")
prev_content = ""
try:
with open(out_path, "r") as out_file:
prev_content = out_file.read()
except:
# file doesn't exist
pass
content = "\n".join(output) + "\n"
if prev_content != content:
print("Writing %s" % out_path)
with open(out_path, "w") as out_file:
out_file.write(content)
else:
print("Content of %s hasn't changed" % out_path)
if __name__ == "__main__":
main()
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