#!/usr/bin/env bash
APP=$1
set -x

# Signal helper
source /opt/scripts/signals.sh

PID=0
TERM_handler() {
    SIGNAME="$1"
    echo "Killing ${PID}"
    echo "Signal ${SIGNAME}"
    if [ ${PID} -ne 0 ]; then
        ps -ef --forest
        CHILDS=$(pgrep -P "${PID}")
        kill -"${SIGNAME}" -"${PID}"
        for i in $CHILDS; do
          wait $i
        done
    fi
    ps -ef --forest
    ret=$(signal_return_val ${SIGNAME})
    exit $ret
}

signals_trap_with_arg TERM_handler SIGTERM
${APP} &
PID=$$

# wait forever
signals_wait_forever

# https://docs.docker.com/compose/faq/
# https://medium.com/@gchudnov/trapping-signals-in-docker-containers-7a57fdda7d86