lib/omnibus/packagers/base.rb
def run!
      # Ensure the package directory exists
      create_directory(Config.package_dir)

      measure("Packaging time") do
        # Run the setup and build sequences
        instance_eval(&self.class.setup) if self.class.setup
        instance_eval(&self.class.build) if self.class.build

        # Render the metadata
        Metadata.generate(package_path, project)

        # Ensure the temporary directory is removed at the end of a successful
        # run. Without removal, successful builds will "leak" in /tmp and cause
        # increased disk usage.
        #
        # Instead of having this as an +ensure+ block, failed builds will persist
        # this directory so developers can go poke around and figure out why the
        # build failed.
        remove_directory(staging_dir)
      end
    end
def run!
      # Ensure the package directory exists
      create_directory(Config.package_dir)

      measure("Packaging time") do
        # Run the setup and build sequences
        instance_eval(&self.class.setup) if self.class.setup
        instance_eval(&self.class.build) if self.class.build

        # Render the metadata
        Metadata.generate(package_path, project)

        # Ensure the temporary directory is removed at the end of a successful
        # run. Without removal, successful builds will "leak" in /tmp and cause
        # increased disk usage.
        #
        # Instead of having this as an +ensure+ block, failed builds will persist
        # this directory so developers can go poke around and figure out why the
        # build failed.
        remove_directory(staging_dir)
      end
    end
@!endgroup
 --------------------------------------------------

 Execute this packager by running the following phases in order:

   - setup
   - build