Systemd configuration for ruby God supervisor

god.service

[Unit]
Description=God: A process monitoring framework in Ruby
After=network.target

[Service]
Group=_USER_GROUP_
User=_USER_
ExecStart=/usr/local/sbin/god_startup start
ExecStop=/usr/local/sbin/god_startup stop

[Install]
WantedBy=multi-user.target

god_startup.sh

#!/bin/sh

# set HOME to the setuid user's home, there doesn't seem to be a better, portable way
export HOME="$(eval echo ~$(id -un))"

# Find rbenv to use
if [ -d "/usr/local/rbenv/bin" ]; then
  export PATH="/usr/local/rbenv/bin:/usr/local/rbenv/shims:$PATH"
elif [ -d "$HOME/.rbenv/bin" ]; then
  export PATH="$HOME/.rbenv/bin:$HOME/.rbenv/shims:$PATH"
fi

# master.conf directory
CONF_DIR=/etc/god
GOD_BIN=`rbenv which god`
RUBY_BIN=ruby
RETVAL=0

# Go no further if config directory is missing.
[ -d "$CONF_DIR" ] || exit 0

case "$1" in
  start)
    exec $RUBY_BIN $GOD_BIN -D -c $CONF_DIR/master.conf
    ;;
  stop)
    exec $RUBY_BIN $GOD_BIN quit
    ;;
  *)
    echo "Usage: $0 {start|stop}" >&2
    exit 1
    ;;
esac