ytdl-nightly/devscripts/update-version.py

#!/usr/bin/env python3
from __future__ import unicode_literals
from datetime import datetime
import sys


with open('youtube_dl/version.py', 'rt') as f:
    exec(compile(f.read(), 'youtube_dl/version.py', 'exec'))
old_version = locals()['__version__']

old_version_list = old_version.split('.')

old_ver = '.'.join(old_version_list[:3])
old_rev = old_version_list[3] if len(old_version_list) > 3 else ''

ver = datetime.utcnow().strftime("%Y.%m.%d")

rev = (sys.argv[1:] or [''])[0]  # Use first argument, if present as revision number
if not rev:
    rev = str(int(old_rev or 0) + 1) if old_ver == ver else ''

VERSION = '.'.join((ver, rev)) if rev else ver

VERSION_FILE = '''# Autogenerated by devscripts/update-version.py
from __future__ import unicode_literals

__version__ = {!r}
'''.format(VERSION)

with open('youtube_dl/version.py', 'wt') as f:
    f.write(VERSION_FILE)

print(VERSION)