Init script for a ruby app

app_init.sh

#!/bin/bash

path="/home/user/app"
port="3030"
user="user"
branch="stable"
gemset="1.9.3@app"

usage() {
  echo "Usage: $0 {start|stop|restart|migrate|update}"
}

start() {
  su - $user -c "
  cd $path;
  source /home/$user/.rvm/scripts/rvm;
  rvm use $gemset;
  git checkout $branch;
  export RAILS_ENV=production
  passenger start -a 127.0.0.1 -p $port -d;
  "
}

stop() {
  su - $user -c "
  cd $path;
  source /home/$user/.rvm/scripts/rvm;
  rvm use $gemset;
  git checkout $branch;
  export RAILS_ENV=production
  passenger stop -p $port;
  "
}

restart() {
  stop
  start
}

migrate() {
  su - $user -c "
  cd $path;
  source /home/$user/.rvm/scripts/rvm;
  rvm use $gemset;
  git checkout $branch;
  export RAILS_ENV=production
  rake db:migrate
  "
}

update() {
  stop
  su - $user -c "
  cd $path;
  git checkout $branch;
  git pull origin $branch;
  source /home/$user/.rvm/scripts/rvm;
  rvm use $gemset;
  export RAILS_ENV=production
  bundle install
  "
  migrate
  start
}

case $1 in
  "start") start ;;
  "stop") stop ;;
  "restart") restart;;
  "migrate") migrate ;;
  "update") update ;;
  *) usage ;;
esac