thin init.d script supporting individual servers

thin.sh

#!/bin/bash
### BEGIN INIT INFO
# Provides:          thin
# Required-Start:    $local_fs $remote_fs
# Required-Stop:     $local_fs $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: thin initscript
# Description:       thin
### END INIT INFO

# Original author: Forrest Robertson

# Do NOT "set -e"

DAEMON=/usr/local/bin/thin
BUNDLE_DAEMON=/usr/local/bin/bundle
SCRIPT_NAME=/etc/init.d/thin
CONFIG_PATH=/etc/thin
HOME=/var/www
export HOME

# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0

function run_command {
    command=$1
    config=$2
    dir=`grep chdir ${config} |cut -d ' ' -f 2`
    if [ -f $dir/Gemfile ]
    then
        cur=`pwd`
        cd $dir
        $BUNDLE_DAEMON exec $DAEMON -C $config $command
        cd $cur
    else
        $DAEMON -C $config $command
    fi
}

case "$1" in
  start)
    COMMAND=start
	;;
  stop)
    COMMAND=stop
	;;
  restart)
    COMMAND=restart
	;;
  *)
	echo "Usage: $SCRIPT_NAME {start|stop|restart} [server]" >&2
	exit 3
	;;
esac

case "$2" in
  "")
    for i in $CONFIG_PATH/*
    do
        run_command $COMMAND $i
    done
    ;;
  *)
    FILE="$CONFIG_PATH/$2.yml"
    if [ -f $FILE ]
    then
      run_command $COMMAND $FILE
    else
      echo "Expecting config file $FILE but it does not exist" >&2
      exit 3
    fi
    ;;
esac
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