require 'rails/generators/active_record'

class PaulRevereGenerator < Rails::Generators::Base
  include Rails::Generators::Migration

  desc "Copy the PaulRevere JavaScript and announcements migration"
  source_root File.join(File.dirname(__FILE__), "templates")

  def install
    copy_javascript if needs_js_copied?
    migration_template "migration.rb", "db/migrate/create_announcements.rb"
  end

  private

  def copy_javascript
    copy_file File.join(javascript_path, 'announcements.js'), js_destination
  end

  def javascript_path
    File.join(%w(.. .. .. .. app assets javascripts))
  end

  def needs_js_copied?
    !::Rails.application.config.assets.enabled
  end

  def js_destination
    'public/javascripts/announcements.js'
  end

  def self.next_migration_number(dirname)
    ActiveRecord::Generators::Base.next_migration_number(dirname)
  end
end

require 'rails/generators/active_record'

class PaulRevereGenerator < Rails::Generators::Base
  include Rails::Generators::Migration

  desc "Put the JavaScript and migration in place"
  source_root File.join(File.dirname(__FILE__), "templates")

  def install
    copy_javascript if needs_js_copied?
    migration_template "migration.rb", "db/migrate/create_announcements.rb"
  end

  private

  def copy_javascript
    copy_file File.join(javascript_path, 'announcements.js'), js_destination
  end

  def javascript_path
    File.join(%w(.. .. .. .. app assets javascripts))
  end

  def needs_js_copied?
    !::Rails.application.config.assets.enabled
  end

  def js_destination
    'public/javascripts/announcements.js'
  end

  def self.next_migration_number(dirname)
    ActiveRecord::Generators::Base.next_migration_number(dirname)
  end
end

--- 
+++ 
@@ -3,7 +3,7 @@
 class PaulRevereGenerator < Rails::Generators::Base
   include Rails::Generators::Migration
 
-  desc "Put the JavaScript and migration in place"
+  desc "Copy the PaulRevere JavaScript and announcements migration"
   source_root File.join(File.dirname(__FILE__), "templates")
 
   def install
Improve the copy for the rails generator help

Makes it slightly more explicit what running the generator will do to
your Rails application.
