Upgrade to Yarn 4

.eslintignore

@@ -1,5 +1,6 @@
 artifact/
 apps/
+css/dist/
 packages/
 js/dist/
 vendor/

.eslintrc.js

@@ -0,0 +1,15 @@
+module.exports = {
+	root: true,
+	"extends": [
+		"yoast",
+	],
+	parserOptions: {
+		ecmaVersion: 2018,
+		sourceType: "module",
+	},
+	settings: {
+		react: {
+			version: "detect",
+		},
+	},
+};

.github/workflows/jslint.yml

@@ -11,34 +11,34 @@ on:
       - 'feature/**'
     paths:
       - '**.js' # Includes Gruntfile.js.
+      - '**.cjs'
       - '.browserslistrc'
       - '.eslintignore'
-      - '.eslintrc'
       - '.nvmrc'
-      - '.yarnrc'
+      - '.yarnrc.yml'
       - 'lerna.json'
+      - 'nx.json'
       - 'package.json'
       - 'yarn.lock'
       - '.github/workflows/jslint.yml'
       - '.yarn/**'
-      - 'apps/**'
-      - 'config/grunt/**'
+      - 'config/**/*.js'
       - 'packages/**'
   pull_request:
     paths:
       - '**.js' # Includes Gruntfile.js.
+      - '**.cjs'
       - '.browserslistrc'
       - '.eslintignore'
-      - '.eslintrc'
       - '.nvmrc'
-      - '.yarnrc'
+      - '.yarnrc.yml'
       - 'lerna.json'
+      - 'nx.json'
       - 'package.json'
       - 'yarn.lock'
       - '.github/workflows/jslint.yml'
       - '.yarn/**'
-      - 'apps/**'
-      - 'config/grunt/**'
+      - 'config/**/*.js'
       - 'packages/**'
   # Allow manually triggering the workflow.
   workflow_dispatch:
@@ -82,3 +82,6 @@ jobs:
 
       - name: Run Javascript lint
         run: yarn lint
+
+      - name: Run Yarn constraints
+        run: yarn constraints

.github/workflows/jstest.yml

@@ -98,7 +98,6 @@ jobs:
           node --version
           yarn --version
           grunt --version
-          yarn run jest --version
 
       - name: Build all packages
         run: yarn run build --ignore "@yoast/wordpress-seo"
@@ -194,7 +193,6 @@ jobs:
           node --version
           yarn --version
           grunt --version
-          yarn run jest --version
 
       - name: Build all packages
         if: ${{ steps.checks-run.outputs.should == 'true' }}

.gitignore

@@ -18,6 +18,7 @@ local.properties
 .cproject
 .buildpath
 .vscode
+.idea/
 nbproject/
 node_modules/
 bower_components/
@@ -28,7 +29,6 @@ phpunit.xml
 phpunit-integration.xml
 phpunit-wp.xml
 .phpunit.result.cache
-build/
 
 ############
 ## OSes
@@ -37,6 +37,7 @@ build/
 [Tt]humbs.db
 [Dd]esktop.ini
 *.DS_store
+.DS_store
 .DS_store?
 
 ############
@@ -45,6 +46,7 @@ build/
 
 bin/
 tmp/
+/.tmp
 *.tmp
 *.bak
 *.log
@@ -53,20 +55,32 @@ tmp/
 *.cpr
 *.orig
 *.php.in
-.idea/
 temp/
 ._*
 .Trashes
 .env
 .svn
-.tmp
+.cache/phpunit/cache/
+.nx/cache
 
 ############
 ## Composer
 ############
 /vendor/
 /vendor_prefixed/
 
+############
+## Yarn
+############
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+yarn-error.log
+
 ############
 ## WPSEO
 ############
@@ -88,25 +102,14 @@ test.sh
 /premium/src/generated/
 
 ############
-# Dist files
+## Dist files
 ############
 /languages/
 /js/vendor/*
 /js/dist/*
+build/
 /css/dist/*
 /packages/*/dist
 /blocks/**
-yarn-error.log
-coverage
 dependencies.json
 dependencies.md
-.vscode
-.idea/
-.DS_Store
-
-############
-# Temp files
-############
-/.tmp
-
-.cache/phpunit/cache/