deploy.rb

gistfile1.rb

# a quick and easy way to to multi-stage deployments

# the basics
set :keep_releases,       5
set :application,         "app_name"
set :user,                "deploy_user"
set :password,            "the_one_you_use"
set :deploy_to,           "/data/#{application}"

# if using git, otherwise substitute your scm
set :repository,          "git://github.com/user/repo_name.git"
set :scm_username,       ""
set :scm_password,       ""
set :scm,                 :git

# this will execute the Git revision parsing on the *remote* server rather than locally
set :real_revision, 			lambda { source.query_revision(revision) { |cmd| capture(cmd) } }

# database configuration
set :development_database, "app_name_development"
set :development_dbhost,   "mysql.domain.com"

set :production_database, "app_name_production"
set :production_dbhost,   "mysql.domain.com"

set :dbuser,        "user_name_db"
set :dbpass,        "that_password_used"

# comment out if it gives you trouble. newest net/ssh needs this set.
ssh_options[:paranoid] = false

# this is where the "roles" are defined.
task :development do
  
namespace :deploy do

  task :symlink_configs do
  # leave blank like this.
  end

end

  # use localhost or your local IP address
  role :web, "localhost"
  role :app, "localhost"
  role :db , "localhost", :primary => true
  
  set :rails_env, "development"
  set :environment_database, defer { development_database }
  set :environment_dbhost, defer { development_dbhost }
end

task :production do
  
  # use the IP address (and possibly port)
  role :web, "1.2.3.4" 
  role :app, "1.2.3.4"
  role :db , "1.2.3.4", :primary => true
  
  set :rails_env, "production"
  set :environment_database, defer { production_database }
  set :environment_dbhost, defer { production_dbhost }
end

gistfile2.txt

# call the stage by typing..

cap development deploy

# or 

cap production deploy

# wash, rinse, repeat!