#!/bin/bash
### BEGIN INIT INFO
# Provides:          guix-daemon
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Guix build daemon
# Description:       Provides a daemon that does builds for Guix
### END INIT INFO

set -e
mkdir -p "/var/run"
if [ ! -f "/usr/bin/guix-daemon" ]
then
  exit 5
fi

# Source common functions used by init scripts in Debian
. /lib/lsb/init-functions

case "$1" in
start)
  if [ -f "/var/run/guix-daemon.pid" ]
  then
    if pgrep -F "/var/run/guix-daemon.pid" guix-daemon
    then
      exit 0
    else
      echo "guix-daemon has a stale pid file" >&2
      exit 1
    fi
  else
    daemonize \
      -a \
      -e "/var/log/guix-daemon-stderr.log" \
      -o "/var/log/guix-daemon-stdout.log" \
      -E LC_ALL=C.UTF-8 \
      -p "/var/run/guix-daemon.pid" \
      /usr/bin/guix-daemon \
      --build-users-group=_guixbuild --discover=no
  fi
  ;;
stop)
  if [ -f "/var/run/guix-daemon.pid" ]
  then
    pkill -F "/var/run/guix-daemon.pid" guix-daemon || {
      exit 1
    }
    rm -f "/var/run/guix-daemon.pid"
    exit 0
  else
    exit 0
  fi
  ;;
status)
  if [ -f "/var/run/guix-daemon.pid" ]
  then
    if pgrep -F "/var/run/guix-daemon.pid" guix-daemon
    then
      echo "guix-daemon is running"
      exit 0
    else
      echo "guix-daemon has a stale pid file"
      exit 1
    fi
  else
    echo "guix-daemon is not running"
    exit 3
  fi
  ;;
restart|force-reload)
  "$0" stop
  "$0" start
  ;;
*)
  echo "Usage: $0 (start|stop|status|restart|force-reload)"
  exit 3
  ;;
esac