Module: Capistrano::CustomMaintenance

Defined in:
lib/capistrano-custom-maintenance.rb,
lib/capistrano-custom-maintenance/version.rb

Constant Summary collapse

VERSION = 
"0.1.0"

Class Method Summary collapse

Class Method Details

.extended(configuration) ⇒ Object 



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# File 'lib/capistrano-custom-maintenance.rb', line 8

def self.extended(configuration)
  configuration.load {
    namespace(:maintenance) {
      _cset(:maintenance_template_path, File.expand_path("templates", File.dirname(__FILE__)))
      _cset(:maintenance_content_type, "text/html")
      _cset(:maintenance_suffix) { # suffix of maintenance document. guessed from content-type by default.
        MIME::Types[maintenance_content_type].map { |type| type.extensions }.flatten.first
      }
      _cset(:maintenance_basename, "maintenance")
      _cset(:maintenance_filename) { "#{maintenance_basename}.#{maintenance_suffix}" } # filename of maintenance document, not including path part
      _cset(:maintenance_system_path) { File.join(shared_path, maintenance_document_path) } # actual path
      _cset(:maintenance_document_path) { File.join("/system", maintenance_filename) } # virtual path on httpd
      _cset(:maintenance_timestamp) { Time.now }
      _cset(:maintenance_reason) { ENV.fetch("REASON", "maintenance") }
      _cset(:maintenance_deadline) { ENV.fetch("UNTIL", "shortly") }

      def template(name, options={})
        reason = fetch(:maintenance_reason)
        deadline = fetch(:maintenance_deadline)
        options = {
          :path => maintenance_template_path,
          :binding => binding,
        }.merge(options)
        options[:external_encoding] = fetch(:maintenance_input_encoding) if exists?(:maintenance_input_encoding)
        result = top.template(name, options)
        exists?(:maintenance_output_encoding) ? result.encode(fetch(:maintenance_output_encoding)) : result
      end
    }

    namespace(:deploy) {
      namespace(:web) {
        task(:disable, :roles => :web, :except => { :no_release => true }) {
          on_rollback do
            find_and_execute_task("deploy:web:enable")
          end
          top.put(maintenance.template(maintenance_filename), maintenance_system_path, :mode => "644")
        }

        task(:enable, :roles => :web, :except => { :no_release => true }) {
          run("rm -f #{maintenance_system_path.dump}")
        }
      }
    }
  }
end