Migrate from sprockets to propshaft

This changeset was auto-generated by the `rails-template`:
DFE-Digital/rails-template#8

Gemfile

@@ -6,8 +6,8 @@ ruby "3.1.1"
 # Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
 gem "rails", "~> 7.0.3"
 
-# The original asset pipeline for Rails [https://github.com/rails/sprockets-rails]
-gem "sprockets-rails"
+# The newer and simpler asset pipeline for Rails [https://github.com/rails/propshaft]
+gem "propshaft"
 
 # Use sqlite3 as the database for Active Record
 gem "sqlite3", "~> 1.4"

Gemfile.lock

@@ -148,6 +148,11 @@ GEM
       racc (~> 1.4)
     nokogiri (1.13.6-x86_64-linux)
       racc (~> 1.4)
+    propshaft (0.6.4)
+      actionpack (>= 7.0.0)
+      activesupport (>= 7.0.0)
+      rack
+      railties (>= 7.0.0)
     public_suffix (4.0.7)
     puma (5.6.4)
       nio4r (~> 2.0)
@@ -209,13 +214,6 @@ GEM
     rspec-support (3.11.0)
     shoulda-matchers (5.1.0)
       activesupport (>= 5.2.0)
-    sprockets (4.0.3)
-      concurrent-ruby (~> 1.0)
-      rack (> 1, < 3)
-    sprockets-rails (3.4.2)
-      actionpack (>= 5.2)
-      activesupport (>= 5.2)
-      sprockets (>= 3.0.0)
     sqlite3 (1.4.2)
     stimulus-rails (1.0.4)
       railties (>= 6.0.0)
@@ -251,13 +249,13 @@ DEPENDENCIES
   govuk-components
   govuk_design_system_formbuilder
   importmap-rails
+  propshaft
   puma (~> 5.0)
   rails (~> 7.0.3)
   rladr
   rspec
   rspec-rails
   shoulda-matchers (~> 5.1)
-  sprockets-rails
   sqlite3 (~> 1.4)
   stimulus-rails
   tzinfo-data

app/assets/stylesheets/application.scss

@@ -1,7 +1,5 @@
-@import "govuk-frontend/govuk/all";
+$govuk-global-styles: true;
+$govuk-new-link-styles: true;
+$govuk-assets-path: "/";
 
-.app-related-items {
-  @include govuk-text-colour;
-  border-top: 2px solid $govuk-brand-colour;
-  padding-top: govuk-spacing(2);
-}
+@import "govuk-frontend/govuk/all";

app/javascript/application.js

@@ -1,5 +1,3 @@
-// import "./controllers";
-
 import { initAll } from "govuk-frontend";
 
 initAll();

config/application.rb

@@ -35,5 +35,7 @@ class Application < Rails::Application
     config.generators.system_tests = nil
 
     config.exceptions_app = routes
+
+    config.assets.paths << Rails.root.join('node_modules/govuk-frontend/govuk/assets')
   end
 end

package.json

@@ -2,16 +2,12 @@
   "name": "app",
   "private": "true",
   "dependencies": {
-    "@hotwired/stimulus": "^3.0.1",
-    "@hotwired/turbo-rails": "^7.1.1",
     "govuk-frontend": "^4.0.1",
     "esbuild": "^0.14.23",
     "sass": "^1.49.8"
   },
   "scripts": {
     "build:css": "sass --embed-sources --quiet-deps --load-path=node_modules ./app/assets/stylesheets/application.scss ./app/assets/builds/application.css",
-    "build:js": "esbuild app/javascript/*.* --bundle --outdir=app/assets/builds",
-    "preinstall": "mkdir -p app/assets/builds/{fonts,images}",
-    "postinstall": "cp -R node_modules/govuk-frontend/govuk/assets/fonts/. app/assets/builds/fonts && cp -R node_modules/govuk-frontend/govuk/assets/images/. app/assets/builds/images"
+    "build:js": "esbuild app/javascript/*.* --bundle --outdir=app/assets/builds"
   }
 }

yarn.lock

@@ -2,29 +2,6 @@
 # yarn lockfile v1
 
 
-"@hotwired/stimulus@^3.0.1":
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/@hotwired/stimulus/-/stimulus-3.0.1.tgz#141f15645acaa3b133b7c247cad58ae252ffae85"
-  integrity sha512-oHsJhgY2cip+K2ED7vKUNd2P+BEswVhrCYcJ802DSsblJFv7mPFVk3cQKvm2vHgHeDVdnj7oOKrBbzp1u8D+KA==
-
-"@hotwired/turbo-rails@^7.1.1":
-  version "7.1.1"
-  resolved "https://registry.yarnpkg.com/@hotwired/turbo-rails/-/turbo-rails-7.1.1.tgz#35c03b92b5c86f0137ed08bef843d955ec9bbe83"
-  integrity sha512-ZXpxUjCfkdbuXfoGrsFK80qsVzACs8xCfie9rt2jMTSN6o1olXVA0Nrk8u02yNEwSiVJm/4QSOa8cUcMj6VQjg==
-  dependencies:
-    "@hotwired/turbo" "^7.1.0"
-    "@rails/actioncable" "^7.0"
-
-"@hotwired/turbo@^7.1.0":
-  version "7.1.0"
-  resolved "https://registry.yarnpkg.com/@hotwired/turbo/-/turbo-7.1.0.tgz#27e44e0e3dc5bd1d4bda0766d579cf5a14091cd7"
-  integrity sha512-Q8kGjqwPqER+CtpQudbH+3Zgs2X4zb6pBAlr6NsKTXadg45pAOvxI9i4QpuHbwSzR2+x87HUm+rot9F/Pe8rxA==
-
-"@rails/actioncable@^7.0":
-  version "7.0.3"
-  resolved "https://registry.yarnpkg.com/@rails/actioncable/-/actioncable-7.0.3.tgz#71f08e958883af64f6a20489318b5e95d2c6dc5b"
-  integrity sha512-Iefl21FZD+ck1di6xSHMYzSzRiNJTHV4NrAzCfDfqc/wPz4xncrP8f2/fJ+2jzwKIaDn76UVMsALh7R5OzsF8Q==
-
 anymatch@~3.1.2:
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/anymatch/-/anymatch-3.1.2.tgz#c0557c096af32f106198f4f4e2a383537e378716"