A script to update copyright notice with a year in which a file was created

take_year_from_git.py

import subprocess
import glob

def update_year_in_file(filename):
    print('- ' + filename)

    c = subprocess.run(
        f"git log --diff-filter=A --follow --format=%ad --date=format:'%Y' -- {filename} | tail -1",
        shell=True, capture_output=True)

    year = c.stdout[:-1].decode('utf-8')
    if int(year) == 2019:
        print('  2019 :(')
        return

    print('  ' + year)

    pos = -1
    header = None
    rest = None
    with open(filename) as f:
        header = f.read(80)
        pos = header.find("Copyright 2019 Aleth")
        if pos < 0:
            print('  No copyright')
            return
        rest = "".join(f.readlines())

    pos += 10
    header = header[:pos] + year + '-' + header[pos:]

    with open(filename, 'w') as f:
        f.write(header)
        f.write(rest)

files = []
files += glob.glob('**/*.h', recursive=True)
files += glob.glob('**/*.hpp', recursive=True)
files += glob.glob('**/*.cpp', recursive=True)
files += glob.glob('**/*.txt', recursive=True)
files += glob.glob('**/*.cmake', recursive=True)
files += glob.glob('**/*.yml', recursive=True)
files += glob.glob('**/*.json', recursive=True)
files += glob.glob('**/*.bat', recursive=True)
files += glob.glob('**/*.sh', recursive=True)

for f in files:
    if f.startswith('build'):
        continue
    if f.startswith('test/jsontests'):
        continue
    update_year_in_file(f)