move asset_sync require to the earliest point possible

Changelog.md

@@ -19,8 +19,9 @@
 * Fix posting to Twitter [#2758](https://github.com/diaspora/diaspora/issues/2758)
 * Don't show hovercards for current user in comments [#3999](https://github.com/diaspora/diaspora/issues/3999)
 * Replace mentions of out-of-aspect people with markdown links [#4161](https://github.com/diaspora/diaspora/pull/4161)
-* Unify hide and ignore [#3828](https://github.com/diaspora/diaspora/issues/3828)
+* Unify hide and ignore [#3827](https://github.com/diaspora/diaspora/issues/3828)
 * Remove alpha branding [#4196](https://github.com/diaspora/diaspora/issues/4196)
+* Fix dynamic loading of asset_sync
 
 ## Features
 

config/application.rb

@@ -3,6 +3,9 @@
 require 'rails/all'
 Bundler.require(*Rails.groups(:assets => %w(development test))) if defined?(Bundler)
 
+# Load asset_sync early
+require_relative 'asset_sync'
+
 module Diaspora
   class Application < Rails::Application
     # Settings in config/environments/* take precedence over those specified here.

config/asset_sync.rb

@@ -0,0 +1,11 @@
+if AppConfig.environment.assets.upload? && AppConfig.environment.s3.enable?
+  # Monkey patch to make Rails.root available early
+  require 'pathname'
+  module Rails
+    def self.root
+      @@root ||= Pathname.new(__FILE__).dirname.join('..')
+    end
+  end
+
+  require 'asset_sync'
+end

config/initializers/asset_sync.rb

@@ -1,6 +1,4 @@
-
-if AppConfig.environment.assets.upload? && AppConfig.environment.s3.enable?
-  require 'asset_sync'
+if defined? AssetSync
   AssetSync.configure do |config|
     config.enabled = true