Automatically register assets with Sprockets

Author: olivier-thatch

CHANGELOG.md

@@ -1,6 +1,7 @@
 ### 0.6.1 (Next)
 
 * Your contribution here.
+* [#132](https://github.com/ruby-grape/grape-swagger-rails/pull/132): Automatically register assets with Sprockets - [@olivier-thatch](https://github.com/olivier-thatch).
 
 ### 0.6.0 (2024/11/21)
 

README.md

@@ -217,42 +217,6 @@ NOTE: This action should be run part of this gem (not your application). In case
 make it up-to-date, clone the repo, run the rake task, examine the diff, fix any bugs, make sure
 tests pass and then send PR here.
 
-### Enabling in a Rails-API Project
-
-The grape-swagger-rails gem uses the Rails asset pipeline for its Javascript and CSS. Enable the asset pipeline with [rails-api](https://github.com/rails-api/rails-api).
-
-Add sprockets to `config/application.rb`.
-
-```ruby
-require 'sprockets/railtie'
-```
-
-Include JavaScript in `app/assets/javascripts/application.js`.
-
-```javascript
-//
-//= require_tree .
-```
-
-Include CSS stylesheets in `app/assets/stylesheets/application.css`.
-
-```css
-/*
-*= require_tree .
-*/
-```
-
-### Enabling in Rails 6 (Sprokets 5)
-
-Rails 6 top-level targets are determined via `./app/assets/config/manifest.js`. Specify `grape-swagger-rails` asset files as follows.
-
-```javascript
-//= link grape_swagger_rails/application.css
-//= link grape_swagger_rails/application.js
-```
-
-See [Upgrading Sprokets](https://github.com/rails/sprockets/blob/master/UPGRADING.md#manifestjs) for more information.
-
 ## Contributors
 
 * [unloved](https://github.com/unloved)

lib/grape-swagger-rails/engine.rb

@@ -3,6 +3,22 @@
 module GrapeSwaggerRails
   class Engine < ::Rails::Engine
     paths['lib/tasks'] = 'lib/tasks/exported'
+
     isolate_namespace GrapeSwaggerRails
+
+    initializer 'grape_swagger_rails.assets', group: :all do |app|
+      if app.config.respond_to?(:assets) && defined?(Sprockets)
+        if Sprockets::VERSION.to_i >= 4
+          app.config.assets.precompile << 'grape_swagger_rails/application.js'
+          app.config.assets.precompile << 'grape_swagger_rails/application.css'
+          app.config.assets.precompile << 'grape_swagger_rails/favicon.ico'
+        else
+          # use a proc instead of a string
+          app.config.assets.precompile << proc { |path| path == 'grape_swagger_rails/application.js' }
+          app.config.assets.precompile << proc { |path| path == 'grape_swagger_rails/application.css' }
+          app.config.assets.precompile << proc { |path| path == 'grape_swagger_rails/favicon.ico' }
+        end
+      end
+    end
   end
 end

spec/dummy/app/assets/config/manifest.js

@@ -1,3 +1,2 @@
 //= link_directory ../stylesheets .css
 //= link_directory ../javascripts .js
-//= link grape_swagger_rails_manifest.js