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#!/usr/bin/env python3
# Copyright (c) 2023 Google Inc.
#
# 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.
# Args: <CHANGES-file> <tag> <output-file>
# Updates an output file with changelog from the given CHANGES file and tag.
# - search for first line matching <tag> in file <CHANGES-file>
# - search for the next line with a tag
# - writes all the lines in between those 2 tags into <output-file>
import errno
import os
import os.path
import re
import subprocess
import logging
import sys
# Regex to match the SPIR-V version tag.
# Example of matching tags:
# - v2020.1
# - v2020.1-dev
# - v2020.1.rc1
VERSION_REGEX = re.compile(r'^(v\d+\.\d+) +[0-9]+-[0-9]+-[0-9]+$')
def mkdir_p(directory):
"""Make the directory, and all its ancestors as required. Any of the
directories are allowed to already exist."""
if directory == "":
# We're being asked to make the current directory.
return
try:
os.makedirs(directory)
except OSError as e:
if e.errno == errno.EEXIST and os.path.isdir(directory):
pass
else:
raise
def main():
FORMAT = '%(asctime)s %(message)s'
logging.basicConfig(format="[%(asctime)s][%(levelname)-8s] %(message)s", datefmt="%H:%M:%S")
if len(sys.argv) != 4:
logging.error("usage: {} <CHANGES-path> <tag> <output-file>".format(sys.argv[0]))
sys.exit(1)
changes_path = sys.argv[1]
start_tag = sys.argv[2]
output_file_path = sys.argv[3]
changelog = []
has_found_start = False
with open(changes_path, "r") as file:
for line in file.readlines():
m = VERSION_REGEX.match(line)
if m:
print(m.groups()[0])
print(start_tag)
if has_found_start:
break;
if start_tag == m.groups()[0]:
has_found_start = True
continue
if has_found_start:
changelog.append(line)
if not has_found_start:
logging.error("No tag matching {} found.".format(start_tag))
sys.exit(1)
content = "".join(changelog)
if os.path.isfile(output_file_path):
with open(output_file_path, 'r') as f:
if content == f.read():
sys.exit(0)
mkdir_p(os.path.dirname(output_file_path))
with open(output_file_path, 'w') as f:
f.write(content)
sys.exit(0)
if __name__ == '__main__':
main()
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