add :reconfig action

gistfile1.rb

require 'chef/mixin/command'

# Modify constructor of the Package resource to allow the action :reconfig

module AddReconfigAction
  def self.included( klass )
    klass.class_eval do
      alias_method :init_pre, :initialize
      def initialize( *args )
        init_pre( *args )
        @allowed_actions.push( :reconfig )
      end
    end
  end
end

class Chef
  class Resource
    class Package < Chef::Resource
      include AddReconfigAction
    end
  end
end


# add generic :reconfig action skeleton to generic package provider

class Chef
  class Provider
    class Package < Chef::Provider
      def action_reconfig
        if @current_resource.version == nil then
          Chef::Log.debug("#{@new_resource} is NOT installed - nothing to do")
          return
        end

        preseed_package( @new_resource.package_name, @current_resource.version ) if @new_resource.response_file
        status = reconfig_package( @new_resource.package_name )
        @new_resource.updated_by_last_action(true) if status
        Chef::Log.info( "#{@new_resource} reconfigured" )
      end

      def reconfig_package( name )
        raise( Chef::Exceptions::UnsupportedAction, "#{self.to_s} does not support :reconfig" )
      end
    end
  end
end


# implement new :reconfig action for the apt provider

class Chef
  class Provider
    class Package
      class Apt < Chef::Provider::Package
        def reconfig_package( name )
          Chef::Log.info("#{@new_resource} running dpkg-reconfigure #{name}")
          run_command_with_systems_locale(
            :command => "dpkg-reconfigure #{name}",
            :environment => {
              "DEBIAN_FRONTEND" => "noninteractive"
            }
          )
        end

        def get_preseed_file(name, version)
          resource = preseed_resource(name, version)
          resource.run_action('create')
          Chef::Log.debug("#{@new_resource} fetched preseed file to #{resource.path}")
          resource.path
        end
      end
    end
  end
end