RoR with Ruby 2.0.0 on Dreamhost

Ruby2 on Dreamhost

BUILD AND INSTALL RUBY FROM SOURCE

cd ~
mkdir build
cd build
wget http://cache.ruby-lang.org/pub/ruby/2.0/ruby-2.0.0-p247.tar.gz
tar xzf ruby-2.0.0-p247.tar.gz
cd ruby-2.0.0-p247
./configure --prefix /home/adamish/ruby # <=== make sure you install to your own home directory
make install

Add the following to your ~/.bash_profile

export GEM_HOME="$HOME/.gems"
export GEM_PATH="$GEM_HOME"
export PATH=~/ruby/bin:$PATH

In Application Gemfile

    # required for JS runtime
    gem 'therubyracer'
    # required for FCGI wrapper
    gem 'fcgi'

Create APPLICATION/public/dispatch.fcgi and add following

#!/home/<USERNAME>/ruby/bin/ruby

ENV['RAILS_ENV'] ||= 'production'
ENV['HOME'] ||= `echo ~`.strip
ENV['GEM_HOME'] = File.expand_path('/home/<SSH USERNAME>/.gems')
ENV['GEM_PATH'] = File.expand_path('/home/<SSH USERNAME>/.gems') + ":" +
    File.expand_path('/home/<SSH USERNAME>/.gems')

require 'fcgi' 
require File.join(File.dirname(__FILE__), '../config/environment.rb')

class Rack::PathInfoRewriter
  def initialize(app)
    @app = app
  end

  def call(env)
    env.delete('SCRIPT_NAME')
    parts = env['REQUEST_URI'].split('?')
    env['PATH_INFO'] = parts[0]
    env['QUERY_STRING'] = parts[1].to_s
    @app.call(env)
  end
end
Rack::Handler::FastCGI.run  Rack::PathInfoRewriter.new(APPLICATION_NAME::Application) # REPLACE APPLICATION_NAME WITH YOUR APPLICATION'S NAME (found in config/application.rb)


Make dispatch.fcgi executable 

chmod +x APPLICATION/public/dispatch.fcgi

Create public/.htaccess and add following

<IfModule mod_fastcgi.c>
AddHandler fastcgi-script .fcgi
</IfModule>
<IfModule mod_fcgid.c>
AddHandler fcgid-script .fcgi
</IfModule>

Options +FollowSymLinks +ExecCGI

RewriteEngine On

RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)$ dispatch.fcgi/$1 [QSA,L]

ErrorDocument 500 "Rails application failed to start properly"


TROUBLE SHOOT

If you get "Rails application failed to start properly", switch to APPLICATION/public  and run ./dispatch.fcgi
You will get error, fix it.

RESTART

It should automatically reload when files are changed. If not, run "killall -9 dispatch.fcgi" and run "./dispatch.fcgi"