Print a list of old package versions of pacman cache

old_pkg_versions.py

#!/bin/env python
'''
Print old package version paths of pacman cache
'''

import re
from glob import glob

pkg_name = re.compile(r'.+/(\w+)-')


def main():
    packages = glob('/var/cache/pacman/pkg/*')
    packages.sort()
    latest_version = {}
    for pkg in packages:
        try:
            latest_version[pkg_name.match(pkg).group(1)] = pkg
        except AttributeError:
            pass

    for pkg in packages:
        if pkg not in latest_version.values():
            print(pkg)


if __name__ == "__main__":
    main()