deploy with puma, ssh and bash

deploy

#!/bin/bash
user_name='your_name'
app_name="your_app_name"
deploy_to_port="22"
git push -f $app_name $1
app_path="/home/$user_name/projects"
deploy_to_ip=`cat $app_path/$app_name/tmp/ip`
deploy_app_path="/home/$user_name/projects"
deploy_path="$deploy_app_path/$app_name"
current_path="$deploy_path/current"
shared_path="$deploy_path/shared"
release_path="$deploy_path/releases/`date +'%Y%m%d%H%M%S'`"
restart_command="cd $current_path && ~/.rvm/bin/rvm default do bundle exec puma -C $current_path/config/puma.rb --daemon"
ssh $user_name@$deploy_to_ip -p $deploy_to_port "
/bin/bash -l -c '
  mkdir -p $release_path &&
  cd $release_path &&
  git init &&
  git remote add $app_name ssh://git@$deploy_to_ip:$deploy_to_port/home/git/$app_name.git &&
  git pull $app_name $1 &&
  git checkout $1 &&
  rm -rf $current_path &&
  ln -sf $release_path $current_path &&
  rm -rf $release_path/log &&
  rm -rf $release_path/tmp &&
  rm -rf $release_path/public &&
  ln -sf $shared_path/log $release_path &&
  ln -sf $shared_path/tmp $release_path &&
  ln -sf $shared_path/public $release_path &&
  rm -rf $shared_path/tmp/cache &&
  ln -sf $shared_path/config/database.yml $release_path/config/database.yml &&
  ln -sf $shared_path/env $release_path/env &&
  ln -sf $shared_path/config/secrets.yml $release_path/config/secrets.yml &&
  ln -sf $shared_path/config/puma.rb $release_path/config/puma.rb &&
  ln -sf $shared_path/config/environments/$app_name.rb $release_path/config/environments/$app_name.rb &&
  bundle &&
  RAILS_ENV=$app_name rake db:migrate &&
  RAILS_ENV=$app_name rake assets:precompile &&
  $restart_command'"