old.py

#!/usr/bin/env python
# file: old.py
# vim:fileencoding=utf-8:ft=python
#
# Copyright © 2014-2017 R.F. Smith <rsmith@xs4all.nl>.
# SPDX-License-Identifier: MIT
# Created: 2014-02-10T22:02:02+01:00
# Last modified: 2020-12-16T00:25:56+0100
"""
Renames a directory by prefixing the name with 'old-'.

If the directory name starts with a period, it removes the period and prefixes
it with 'old-dot'.
"""

from datetime import datetime
import logging
import os
import sys

__version__ = "2020.12.16"

if len(sys.argv) < 2:
    binary = os.path.basename(sys.argv[0])
    print(f"{binary} ver. {__version__}", file=sys.stderr)
    print(f"Usage: {binary} directory ...", file=sys.stderr)
    sys.exit(1)
logging.basicConfig(format="%(levelname)s: %(message)s")

for dirname in sys.argv[1:]:
    if not os.path.isdir(dirname):
        logging.warning(f"'{dirname}' is not a directory. Skipping.")
        continue
    if dirname.endswith(os.sep):
        dirname = dirname[:-1]
    dt = datetime.now().strftime("-%Y%m%dT%H%M")
    if dirname.startswith("."):
        newname = "".join(["old-dot", dirname[1:], dt])
    else:
        newname = "".join(["old-", dirname, dt])
    if os.path.exists(newname):
        logging.warning(f"'{newname}' already exists. Skipping rename of '{dirname}'.")
        continue
    os.rename(dirname, newname)