deploy.rb

# deploy.rb
# sample capistrano deploy file
# USAGE:
#  => cap build deploy:setup
#  => cap build deploy
#  => cap staging restart
#  => Do notice after deploy callbacks 

task :staging do
  role :web, "<server-1>"
  role :app, "<server-1>"
  role :db,  "<server-1>", :primary => true
  set :application, "<staging-app-name>"
end

task :build do
  role :web, "<server-2>"
  role :app, "<server-2>"
  role :db,  "<server-2>", :primary => true
  set :application, "<build-app-name>"
end

set(:deploy_to) { "/var/www/apps/#{application}" }
set :keep_releases, 5

set :user, "<ssh-user>"
set :password, "<ssh-user-password>"
set :group, "<user-group>"
set :use_sudo, false

set :repository, "git@github.com:gakshay/<app_name>.git"
set :scm, "git"
set :branch, "<branch-needs-to-be-deployed>"
set :scm_username, "<scm-username>"
set :scm_password, "<scm-passsword>"

after "deploy", "deploy:cleanup"
after "deploy:migrations", "deploy:cleanup"
after "deploy:update_code", "deploy:symlink_configs", "deploy:symlink_custom"



namespace :files do
  desc "list all the files"
  task :list, :roles => :app do 
    run "cd #{deploy_to}; ls -l"
  end
  
  desc "tree structure of the files"
  task :tree, :roles => :app do 
    run "cd #{deploy_to}; tree"
  end
end



namespace :deploy do
  desc "Disable your web application"
  namespace :web do
    task :disable, :roles => :web do
      on_rollback { delete "#{shared_path}/system/maintenance.html" }
      maintenance = File.read("./public/maintenance.html")
      put maintenance, "#{shared_path}/system/maintenance.html", 
      :mode => 0644
    end  
  end

  desc "Restart Application"
  task :restart, :roles => :app do
    run "touch #{deploy_to}/#{shared_dir}/tmp/restart.txt"
  end

  desc "Setup Standard Configuration Links"
  task :symlink_configs, :roles => [:app] do
    # relink shared database configuration
    run "ln -nfs #{deploy_to}/#{shared_dir}/config/database.yml #{release_path}/config/database.yml"

    # relink shared tmp dir
    run "rm -rf #{release_path}/tmp"  # technically shouldn't be in svn/git
    run "ln -nfs #{deploy_to}/#{shared_dir}/tmp #{release_path}/tmp"
  end

  desc "Custom Symlinks"
  task :symlink_custom, :roles => [:app] do
    run "if [ -d #{release_path}/public/gallery_photos ]; then mv #{release_path}/public/gallery_photos #{release_path}/public/gallery_photos.bak; fi; ln -nfs #{shared_path}/directories/gallery_photos #{release_path}/public/gallery_photos"
    run "if [ -d #{release_path}/public/profile_photos ]; then mv #{release_path}/public/profile_photos #{release_path}/public/profile_photos.bak; fi; ln -nfs #{shared_path}/directories/profile_photos #{release_path}/public/profile_photos"
  end

end

desc "Restart Apache."
task :restart_apache, :roles => :app do
  run "apache2ctl restart"
end

desc 'Dumps the production database to db/production_data.sql on the remote server'
task :remote_db_dump, :roles => :db, :only => { :primary => true } do
  run "cd #{deploy_to}/#{current_dir} && " +
  "#{rake} RAILS_ENV=#{rails_env} db:database_dump --trace" 
end

desc 'Cleans up data dump file'
task :remote_db_cleanup, :roles => :db, :only => { :primary => true } do  
  delete "#{deploy_to}/#{current_dir}/db/production_data.sql" 
end