changelogParser.py

# -*- coding: utf-8 -*-

# ---- RUN ----
# python3 main.py --header MyHeader --version 1.0.1 --path /home/user/pathToFile/CHANGELOG.md
# -------------

import argparse
import re
from datetime import datetime

syncVersion = 'v1.0.0'
my_parser = argparse.ArgumentParser(prog='changelogParser.py',
                                    description='CHANGELOG.md parser',
                                    epilog='Happy Hacking', allow_abbrev=False)
my_parser.version = syncVersion
my_parser.add_argument('-j', action='version')
my_parser.add_argument('--header', action='store', type=str, required=True,
                       help='')
my_parser.add_argument('--version', action='store', type=str, required=True,
                       help='')
my_parser.add_argument('--path', action='store', type=str, required=True,
                       help='')
args = my_parser.parse_args()
print('CLI arguments: ' + str(args))

if __name__ == '__main__':
    filepath = args.path
    tempVal = ''
    finalVal = ''
    with open(filepath, 'r+') as orFile:
        fileContent = orFile.readlines()
        flag = False
        copy = False
        for line in fileContent:
            if flag is True:
                if line != '\n' or line.startswith('[Task]'):
                    tempVal = tempVal + line if line != '\n' else line
                    task = True
                else:
                    flag = False
            else:
                if line.startswith('##') and copy is False:
                    if re.search(r'\((.*?)\)', line).group(1) != '':
                        finalVal = finalVal + tempVal + '\n'
                        copy = True
                if line.startswith('##'):
                    if args.header == re.search(r'\[(.*?)\]', line).group(1) and re.search(r'\((.*?)\)', line).group(1) == '':
                        finalVal = finalVal + line + '\n'
                        flag = True
                        tempVal = tempVal + f'## [{args.header} {args.version}] ({datetime.now().strftime("%Y-%m-%d")})\n'
                    else:
                        finalVal = finalVal + line
                else:
                    finalVal = finalVal + line
        if copy is False:
            finalVal = finalVal + '\n' + tempVal
        orFile.truncate(0)
        orFile.write(finalVal)

Run with: python3 main.py --header Zum --version 1.0.1 --path /home/user/pathToFile/CHANGELOG.md