#!/usr/bin/env bash

# vim: set ts=4 sw=4:

set -eo pipefail

readonly SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)

# Kill all processes that have some file opened in the chroot, except this script.

echo 'Terminating remaining processes in the chroot'

if lsof -Fp -p ^$$ "$SCRIPT_DIR" | sed -n 's/^p//p' | xargs -r kill; then

sleep 1

if lsof -Fp -p ^$$ "$SCRIPT_DIR" >/dev/null; then

echo 'Waiting 5 sec for processes to terminate before killing them...'

sleep 5

lsof -Fp -p ^$$ "$SCRIPT_DIR" | sed -n 's/^p//p' | xargs -r kill -SIGKILL

fi

fi

# Unmounts all filesystem under the specified directory tree.

failed=false

for path in $(cat /proc/mounts | cut -d' ' -f2 | grep "^$SCRIPT_DIR." | sort -r); do

echo "Unmounting $path"

umount -fn "$path" || failed=true

done

if $failed; then

echo "Skipping removal of $SCRIPT_DIR due to previous error(s)" >&2

else

echo "Removing $SCRIPT_DIR" >&2

rm -rf --one-file-system "$SCRIPT_DIR"

fi