#!/bin/sh
set -e

# A node left running once its package is gone serves from deleted code, and
# keeps writing bytecode into the shared venv. Every instance stops here: the
# system ones, and the user service in each running user manager. Not on
# upgrade: the postinst restarts the node onto new code.
stop_user_nodes() {
    for bus in /run/user/*/systemd/private; do
        [ -S "$bus" ] || continue
        uid=$(basename "$(dirname "$(dirname "$bus")")")
        user=$(id -nu "$uid" 2>/dev/null) || continue
        systemctl --user -M "$user@" stop meshbay-node.service 2>/dev/null || true
    done
}

case "$1" in
    remove|deconfigure)
        if [ -d /run/systemd/system ]; then
            systemctl stop 'meshbay-node@*.service' 2>/dev/null || true
            stop_user_nodes
        fi
        ;;
esac

# The node's code lives in meshbay-common's venv, and meshbay-common's own
# cleanup runs only after this package is gone: the bytecode compiled next to
# it is removed here, or dpkg cannot remove the directories it sits in.
case "$1" in
    remove|upgrade|deconfigure)
        find /opt/meshbay-common/venv/lib/python3.*/site-packages/meshbay_node \
            -depth -type d -name __pycache__ -exec rm -rf {} + 2>/dev/null || true
        ;;
esac

#DEBHELPER#