move acts_as_list to gems (empty vendor/plugins)

fixes CNVS-12056

test plan:
  * ordering/reordering of modules/module items should still work
  * ordering/reordering of discussion topics should still work

Change-Id: I599b559933a4a89c9329d631d71f83343c6f24da
Reviewed-on: https://gerrit.instructure.com/32516
Tested-by: Jenkins <jenkins@instructure.com>
Product-Review: Simon Williams <simon@instructure.com>
Reviewed-by: Cameron Sutter <csutter@instructure.com>
QA-Review: Matt Fairbourn <mfairbourn@instructure.com>

Gemfile.d/other_stuff.rb

@@ -114,6 +114,7 @@ gem 'foreigner', '0.9.2'
 gem 'crocodoc-ruby', '0.0.1', :require => 'crocodoc'
 
 gem 'activesupport-suspend_callbacks', :path => 'gems/activesupport-suspend_callbacks'
+gem 'acts_as_list', :path => 'gems/acts_as_list'
 gem 'adheres_to_policy', :path => 'gems/adheres_to_policy'
 gem 'canvas_breach_mitigation', :path => 'gems/canvas_breach_mitigation'
 gem 'canvas_color', :path => 'gems/canvas_color'

gems/acts_as_list/Gemfile

@@ -0,0 +1,8 @@
+source 'https://rubygems.org'
+gemspec
+
+if CANVAS_RAILS3
+  gem 'rails', '3.2.15'
+else
+  gem 'rails', :github => 'makandra/rails', :branch => '2-3-lts', :ref => 'e86daf8ff727d5efc0040c876ba00c9444a5d915'
+end

gems/acts_as_list/acts_as_list.gemspec

@@ -0,0 +1,27 @@
+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+
+unless defined?(CANVAS_RAILS3)
+  CANVAS_RAILS3 = !!ENV["CANVAS_RAILS3"] || File.exist?(File.expand_path("../../../config/RAILS3", __FILE__))
+end
+
+Gem::Specification.new do |spec|
+  spec.name          = "acts_as_list"
+  spec.version       = "0.0.1"
+  spec.authors       = ["Brian Palmer"]
+  spec.email         = ["brianp@instructure.com"]
+  spec.summary       = %q{This acts_as extension provides the capabilities for sorting and reordering a number of objects in a list.}
+  spec.homepage      = "https://github.com/instructure/canvas-lms"
+  spec.license       = "AGPL"
+
+  spec.files         = Dir.glob("{lib,spec}/**/*")
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency "rails"
+
+  spec.add_development_dependency "bundler", "~> 1.5"
+  spec.add_development_dependency "sqlite3"
+end

gems/acts_as_list/lib/acts_as_list.rb

@@ -1,3 +1,2 @@
-$:.unshift "#{File.dirname(__FILE__)}/lib"
 require 'active_record/acts/list'
-ActiveRecord::Base.class_eval { include ActiveRecord::Acts::List }
+ActiveRecord::Base.class_eval { include ActiveRecord::Acts::List }