# File lib/bundler/deployment.rb, line 3
    def self.define_task(context, task_method = :task, opts = {})
      if defined?(Capistrano) && context.is_a?(Capistrano::Configuration)
        context_name = "capistrano"
        role_default = "{:except => {:no_release => true}}"
        error_type = ::Capistrano::CommandError
      else
        context_name = "vlad"
        role_default = "[:app]"
        error_type = ::Rake::CommandFailedError
      end

      roles = context.fetch(:bundle_roles, false)
      opts[:roles] = roles if roles

      context.send :namespace, :bundle do
        send :desc, "Install the current Bundler environment. By default, gems will be \\\ninstalled to the shared/bundle path. Gems in the development and \\\ntest group will not be installed. The install command is executed \\\nwith the --deployment and --quiet flags. If the bundle cmd cannot \\\nbe found then you can override the bundle_cmd variable to specify \\\nwhich one it should use. The base path to the app is fetched from \\\nthe :latest_release variable. Set it for custom deploy layouts.\n\nYou can override any of these defaults by setting the variables shown below.\n\nN.B. bundle_roles must be defined before you require 'bundler/\#{context_name}' \\\nin your deploy.rb file.\n\nset :bundle_gemfile,  \"Gemfile\"\nset :bundle_dir,      File.join(fetch(:shared_path), 'bundle')\nset :bundle_flags,    \"--deployment --quiet\"\nset :bundle_without,  [:development, :test]\nset :bundle_cmd,      \"bundle\" # e.g. \"/opt/ruby/bin/bundle\"\nset :bundle_roles,    \#{role_default} # e.g. [:app, :batch]\n"
        send task_method, :install, opts do
          bundle_cmd     = context.fetch(:bundle_cmd, "bundle")
          bundle_flags   = context.fetch(:bundle_flags, "--deployment --quiet")
          bundle_dir     = context.fetch(:bundle_dir, File.join(context.fetch(:shared_path), 'bundle'))
          bundle_gemfile = context.fetch(:bundle_gemfile, "Gemfile")
          bundle_without = [*context.fetch(:bundle_without, [:development, :test])].compact
          app_path = context.fetch(:latest_release)
          if app_path.to_s.empty?
            raise error_type.new("Cannot detect current release path - make sure you have deployed at least once.")
          end
          args = ["--gemfile #{File.join(app_path, bundle_gemfile)}"]
          args << "--path #{bundle_dir}" unless bundle_dir.to_s.empty?
          args << bundle_flags.to_s
          args << "--without #{bundle_without.join(" ")}" unless bundle_without.empty?

          run "cd #{app_path} && #{bundle_cmd} install #{args.join(' ')}"
        end
      end
    end