Re-enable sprockets handling JS in Rails 6.0

resprocketize.diff

diff --git a/Gemfile b/Gemfile
index 79cc614..9e03100 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,6 +11,8 @@ gem 'sqlite3', '~> 1.4'
 gem 'puma', '~> 3.11'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5'
+# Bring back uglifier for sprockets
+gem 'uglifier', '>= 1.3.0'
 # Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
 gem 'webpacker', '~> 4.0'
 # Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
@@ -28,6 +30,9 @@ gem 'jbuilder', '~> 2.7'
 # Reduces boot times through caching; required in config/boot.rb
 gem 'bootsnap', '>= 1.4.2', require: false
 
+# Add your obsolete gems etc
+gem 'momentjs-rails'
+
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
diff --git a/app/assets/config/manifest.js b/app/assets/config/manifest.js
index 5918193..b16e53d 100644
--- a/app/assets/config/manifest.js
+++ b/app/assets/config/manifest.js
@@ -1,2 +1,3 @@
 //= link_tree ../images
+//= link_directory ../javascripts .js
 //= link_directory ../stylesheets .css
diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
new file mode 100644
index 0000000..9c488fb
--- /dev/null
+++ b/app/assets/javascripts/application.js
@@ -0,0 +1,2 @@
+//= require moment
+//= require_tree .
diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index 32d9bc1..e721dc9 100644
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -6,6 +6,7 @@
     <%= csp_meta_tag %>
 
     <%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
+    <%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>
     <%= javascript_pack_tag 'application', 'data-turbolinks-track': 'reload' %>
   </head>
 
diff --git a/config/environments/production.rb b/config/environments/production.rb
index a1c2337..8087ceb 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -23,6 +23,7 @@ Rails.application.configure do
   config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
 
   # Compress CSS using a preprocessor.
+  config.assets.js_compressor = :uglifier
   # config.assets.css_compressor = :sass
 
   # Do not fallback to assets pipeline if a precompiled asset is missed.