Remove old snap revisions to clean up some space

snap-rm-old-revisions.sh

#!/bin/bash
# Removes old revisions of snaps
# CLOSE ALL SNAPS BEFORE RUNNING THIS
set -eu

i=0
LANG=en_US.UTF-8 snap list --all | awk '/disabled/{print $1, $3}' |
    while read snapname revision; do
	echo "$snapname $revision"
	((i=i+1))
    done
    
    if [ "$i" -eq "0" ] ; then
    	exit;
    fi

read -p "Remove old revisions ( make sure to close all running snaps )? [yN]: " -n 1 -r
echo    # (optional) move to a new line
if [[ $REPLY =~ ^[Yy]$ ]]
then
	# Elavate to root
	[ "$UID" -eq 0 ] || exec sudo "$0" "$@"
	echo "Removing old snap revisons to free up some space ..."	
	LANG=en_US.UTF-8 snap list --all | awk '/disabled/{print $1, $3}' |
	    while read snapname revision; do
		snap remove "$snapname" --revision="$revision"
	    done
fi