Git-based deployment for non-rails using Capistrano

git_based_deploy.rb

namespace :deploy do
  task :start do ; end
  task :stop do ; end
  task :restart do ; end

  desc "Deploy the app"
  task :default do
    update
  end

  desc "Setup and clone the repo."
  task :setup do
    # setup
    sudo "mkdir -p #{vhost}/repository/"
    # permissions
    sudo "chown -R #{owner}:#{group} #{repo_dir}"
    sudo "chmod -R g+w #{repo_dir}"
    # clone
    run "git clone #{repository} #{deploy_to}"
    # linking
    sudo "rm -rf #{vhost}/httpdocs"
    sudo "ln -s #{httpdocs_link} #{vhost}/httpdocs"
    sudo "chown -R #{user}:#{group} #{vhost}/httpdocs"
  end

  desc "Update the deployed code"
  task :update do
    run "cd #{deploy_to} && git pull origin #{branch}"
  end

  desc "Rollback a single commit."
  task :rollback do
    set :branch, "HEAD^"
    default
  end
end