add a rails/script shim so that we can use $ rails generate migration

config/application.rb

@@ -0,0 +1,18 @@
+# dummy application.rb file that is used in script/rails so we can use the
+# `rails generate migration` command
+
+require File.expand_path('../boot', __FILE__)
+
+require 'active_model/railtie'
+require 'active_record/railtie'
+require 'action_controller/railtie'
+require 'action_view/railtie'
+require 'action_mailer/railtie'
+
+Bundler.require
+require 'travis'
+
+module Travis::Core
+  class Application < Rails::Application
+  end
+end

config/boot.rb

@@ -0,0 +1,10 @@
+# dummy boot.rb file that is used in script/rails so we can use the
+# `rails generate migration` command
+
+require 'rubygems'
+ENV['BUNDLE_GEMFILE'] = File.expand_path('../../Gemfile', __FILE__)
+require 'bundler'
+Bundler.setup
+
+$:.unshift File.expand_path('../../lib', __FILE__)
+

script/rails

@@ -0,0 +1,5 @@
+#!/usr/bin/env ruby
+
+APP_PATH = File.expand_path('../../config/application',  __FILE__)
+require File.expand_path('../../config/boot',  __FILE__)
+require 'rails/commands'