snap.sh

#!/bin/bash

# make snappy installations persistent in qubes app vm's
# 1. copy this script to /rw/config/snap.sh and make it executable.
# 2. add this line to your rc.local: /rw/config/snap.sh --qubes-init

if ! test -e /var/lib/snapd/.qubes; then
   sudo systemctl -q stop snapd.service

   sudo mkdir -p /rw/snap/{etc,lib,mount}
   sudo touch /rw/snap/lib/.qubes

   sudo mount -o bind /rw/snap/lib /var/lib/snapd
   sudo mount -o bind /rw/snap/mount /snap

   cd /rw/snap/etc/
   for m in $(ls); do
       sudo cp -a $m /etc/systemd/system
       sudo systemctl -q enable $m
       sudo systemctl -q start $m
   done

    if [ ! -e /usr/local/bin/snap ]; then
        sudo ln -s /rw/config/snap.sh /usr/local/bin/snap
    fi
fi

if [ "$1" = "--qubes-init" ]; then
    exit 0
fi

/usr/bin/snap $@
rv=$?

sudo rm -f /rw/snap/etc/*.mount
f=$(ls /etc/systemd/system/multi-user.target.wants/snap-*.mount 2>/dev/null)
[ ! -z "$f" ] && sudo cp -L $f /rw/snap/etc

exit $rv