/etc/init.d/thin - thin init script with bundle exec. own your risk - public domain.

thin

#!/bin/bash
DAEMON=/path/to/thin
BUNDLE=/path/to/bundle
CONFIG_PATH=/etc/thin

SCRIPT_NAME=/etc/init.d/thin

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

invoke()
{
  CONFIGS=$CONFIG_PATH/*
  [ -e "$CONFIG_PATH/$2.yml" ] && CONFIGS=$CONFIG_PATH/$2.yml
  for conf in $CONFIGS
  do
    echo "[$1] $conf"
    cd `grep "^chdir: " $conf|sed -e 's/^chdir: //g'`

    [ -d "./log" ] && chown `grep "^user: " $conf|sed -e 's/^user: //g'` ./log
    chown -R `grep "^user: " $conf|sed -e 's/^user: //g'` ./tmp/pids
    chgrp -R `grep "^group: " $conf|sed -e 's/^group: //g'` ./tmp/pids

    if [ -e "Gemfile" ]; then
      $BUNDLE exec $DAEMON $1 -d --config=$conf
    else
      $DAEMON $1 -d --config=$conf
    fi
  done
}
case "$1" in
  start)
  invoke start $2
  ;;
  stop)
  invoke stop $2
  ;;
  restart)
  invoke restart $2
  ;;
  *)
  echo "Usage: $SCRIPT_NAME {start|stop|restart} [config_name]" >&2
  exit 3
  ;;
esac