Find bad Python AUR packages on Arch Linux

bad-pythons.sh

#!/bin/sh
# Find bad Python AUR packages on Arch Linux
# Simply run the script and it should show you what needs updating
# Non-destructive. Arch Linux only. Will show incorrect results when multiple Python versions are installed side by side.
# Intended to provide tech support to people updating complex python projects from the AUR
real_python_dir=$(pacman -Ql python | grep /usr/lib/python | head -1 | cut -d/ -f-4 | cut -d' ' -f2)
set -- /usr/lib/python3.*
for d do
    if [ -e "$d" ] && [ "$d" != "$real_python_dir" ]; then
        set -- "$@" "$d"
    fi
    shift
done

if [ "$#" -ne 0 ]; then
    printf '\033[1;31m%s\033[0m\n' 'WARNING: You have out-of-date python packages, as follows:'
    pacman -Qo -- "$@"
fi