Add CHANGELOG entry for #7927

Removed the asset_path configuration from the guides and added an entry
in the upgrading_ruby_on_rails guide

[ci skip]

actionpack/CHANGELOG.md

@@ -1,11 +1,17 @@
 ## Rails 4.0.0 (unreleased) ##
 
+*   Remove old asset_path configuration (no longer needed now that we have the asset pipeline).
+
+    *Josh Peek*
+
 *   `assert_template` can be used to assert on the same template with different locals
     Fix #3675
 
     *Yves Senn*
 
-*   Remove old asset tag concatenation (no longer needed now that we have the asset pipeline). *Josh Peek*
+*   Remove old asset tag concatenation (no longer needed now that we have the asset pipeline).
+
+    *Josh Peek*
 
 *   Accept :remote as symbolic option for `link_to` helper. *Riley Lynch*
 

guides/source/configuring.md

@@ -56,14 +56,6 @@ These configuration methods are to be called on a `Rails::Railtie` object, such
 
 * `config.asset_host` sets the host for the assets. Useful when CDNs are used for hosting assets, or when you want to work around the concurrency constraints builtin in browsers using different domain aliases. Shorter version of `config.action_controller.asset_host`.
 
-* `config.asset_path` lets you decorate asset paths. This can be a callable, a string, or be `nil` which is the default. For example, the normal path for `blog.js` would be `/javascripts/blog.js`, let that absolute path be `path`. If `config.asset_path` is a callable, Rails calls it when generating asset paths passing `path` as argument. If `config.asset_path` is a string, it is expected to be a `sprintf` format string with a `%s` where `path` will get inserted. In either case, Rails outputs the decorated path. Shorter version of `config.action_controller.asset_path`.
-
-    ```ruby
-    config.asset_path = proc { |path| "/blog/public#{path}" }
-    ```
-
-NOTE. The `config.asset_path` configuration is ignored if the asset pipeline is enabled, which is the default.
-
 * `config.autoload_once_paths` accepts an array of paths from which Rails will autoload constants that won't be wiped per request. Relevant if `config.cache_classes` is false, which is the case in development mode by default. Otherwise, all autoloading happens only once. All elements of this array must also be in `autoload_paths`. Default is an empty array.
 
 * `config.autoload_paths` accepts an array of paths from which Rails will autoload constants. Default is all directories under `app`.
@@ -298,8 +290,6 @@ The schema dumper adds one additional configuration option:
 
 * `config.action_controller.asset_host` sets the host for the assets. Useful when CDNs are used for hosting assets rather than the application server itself.
 
-* `config.action_controller.asset_path` takes a block which configures where assets can be found. Shorter version of `config.action_controller.asset_path`.
-
 * `config.action_controller.perform_caching` configures whether the application should perform caching or not. Set to false in development mode, true in production.
 
 * `config.action_controller.default_static_extension` configures the extension used for cached pages. Defaults to `.html`.

guides/source/upgrading_ruby_on_rails.md

@@ -69,6 +69,8 @@ in the `config/initializers/wrap_parameters.rb` file:
 
 ### Action Pack
 
+Rails 4.0 removed the `ActionController::Base.asset_path` option. Use the assets pipeline feature.
+
 Rails 4.0 has deprecated `ActionController::Base.page_cache_extension` option. Use
 `ActionController::Base.default_static_extension` instead.