00_clear-cache

#!/usr/bin/env bash
#########################################################################
# The Amazing Linux Cache Purger                                        #
#                                                                       #
#   Empties out the ~/.cache directory of every non-root user.          #
#   Empties out Arch Linux' Pacman's package cache directory.           #
#                                                                       #
#   This can optionally use nullfsvfs in order to limit wear-and-tear   #
#   on SSDs.                                                            #
#                                                                       #
#   Saves over 4 GB of space on average on a 3-user system.             #
#                                                                       #
# Part of HopeSeekr's BashScripts Collection                            #
# https://github.com/hopeseekr/BashScripts/                             #
#                                                                       #
# Copyright © 2020 Theodore R. Smith <theodore@phpexperts.pro>          #
# GPG Fingerprint: 4BF8 2613 1C34 87AC D28F  2AD8 EB24 A91D D612 5690   #
#                                                                       #
# License: Creative Commons Attribution v4.0 International              #
#########################################################################

mkdir -p /run/media/sinkhole

## Attempt to mount nullfsvfs
## @see https://github.com/abbbi/nullfsvfs
modprobe nullfs 2>/dev/null
mount -t nullfs none /run/media/sinkhole 2>/dev/null
if [ "$?" -ne 0 ]; then
    echo "NOTICE: Running this without nullfsvfs is not recommended due to extended wear on SSDs."
    echo "        See https://github.com/abbbi/nullfsvfs"
fi

rsync -rv --remove-source-files --exclude={composer,spotify,thumbnails} /home/*/.cache/ /run/media/sinkhole/
rm -rf /run/media/sinkhole/*
for user in $(ls /home); do
    # Delete dangling symlinks.
    # @see https://unix.stackexchange.com/a/49470/15780
    find /home/$user/.cache/ -type l -xtype l -delete
    # Delete empty directories.
    find /home/$user/.cache/ -type d -empty -delete
done

rm -rvf /var/cache/pacman/pkg/*