Drop /cable requests to 404 if using AnyCable

Author: kaptron

Procfile.development

@@ -1,3 +1,4 @@
 web: bin/rails server -p 3000
 webpack: bin/webpack-dev-server
 worker: bundle exec sidekiq -e ${RACK_ENV:-development} -C config/sidekiq.yml
+cable: ANYCABLE_DEPLOYMENT=true bundle exec anycable --server-command="anycable-go --host=localhost --port=3334"

app/controllers/home_controller.rb

@@ -39,6 +39,10 @@ def sign_out_and_redirect
     redirect_to url
   end
 
+  def not_found
+    render plain: 'not found', status: :not_found
+  end
+
   before_action :require_dev_env, only: [:login_as]
   def login_as
     u = User.find(params[:id]) if params[:id]

config/routes.rb

@@ -14,7 +14,11 @@
     root to: 'home#index', constraints: ->(req) { req.format == :html || req.format == '*/*' }
   end
 
-  mount ActionCable.server => '/cable'
+  if ENV['ACTION_CABLE_ADAPTER'] != 'anycable' || ENV['ANYCABLE_DEPLOYMENT']
+    mount ActionCable.server => '/cable'
+  else
+    get 'cable', to: 'home#not_found'
+  end
 
   namespace :api do
     namespace :v1 do