fix: enforce self-hosted runners in workflows

.github/workflows/auto-merge.yml

@@ -17,7 +17,7 @@ concurrency:
 jobs:
   dependabot:
     name: Dependabot PR auto-merge
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted]
     if: ${{ github.actor == 'dependabot[bot]' }}
     steps:
       - name: Checkout

.github/workflows/test-measure.yml

@@ -19,16 +19,16 @@ concurrency:
 
 jobs:
   lint-php:
-    name: 'Lint PHP'
-    runs-on: ubuntu-latest
+    name: "Lint PHP"
+    runs-on: [self-hosted]
     steps:
       - name: Checkout
         uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
 
       - name: Setup PHP
         uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # v2.37.2
         with:
-          php-version: '8.2'
+          php-version: "8.2"
           coverage: none
           tools: cs2pr
 
@@ -54,16 +54,16 @@ jobs:
         run: vendor/bin/phpcs -q --report=checkstyle --runtime-set ignore_errors_on_exit 1 --runtime-set ignore_warnings_on_exit 1 | cs2pr --graceful-warnings
 
   analyse-php:
-    name: 'PHPStan Analysis'
-    runs-on: ubuntu-latest
+    name: "PHPStan Analysis"
+    runs-on: [self-hosted]
     steps:
       - name: Checkout
         uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
 
       - name: Setup PHP
         uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # v2.37.2
         with:
-          php-version: '8.2'
+          php-version: "8.2"
           coverage: none
 
       - name: Get Composer Cache Directory
@@ -86,27 +86,35 @@ jobs:
 
   unit-test-php:
     name: "PHP ${{ matrix.php }} / WP ${{ matrix.wp }}"
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted]
     strategy:
       fail-fast: false
       matrix:
-        php: ['8.2', '8.3', '8.4']
-        wp: ['6.5', '6.6', '6.7', '6.8', '6.9', '7.0']
+        php: ["8.2", "8.3", "8.4"]
+        wp: ["6.5", "6.6", "6.7", "6.8", "6.9", "7.0"]
         exclude:
           # WordPress added PHP 8.4 support in 6.7.
-          - { php: '8.4', wp: '6.5' }
-          - { php: '8.4', wp: '6.6' }
+          - { php: "8.4", wp: "6.5" }
+          - { php: "8.4", wp: "6.6" }
     env:
       WP_ENV_PHP_VERSION: ${{ matrix.php }}
       WP_ENV_CORE: WordPress/WordPress#${{ matrix.wp }}
+      # Must live on the shared work emptyDir mounted by ARC's dind containerMode
+      # so the dind sidecar can resolve the bind-mount source paths wp-env generates.
+      WP_ENV_HOME: /home/runner/_work/_temp/wp-env-home
     steps:
       - name: Checkout
         uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
 
+      - name: Set up Docker Compose
+        uses: docker/setup-compose-action@4eb059ff7f16592f9c84d5ca339c53cb7c5064e2 # v2.3.0
+        with:
+          version: v2.36.2
+
       - name: Setup Node
         uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6
         with:
-          node-version: '20'
+          node-version: "20"
 
       - name: Install Node dependencies
         run: npm ci
@@ -120,19 +128,27 @@ jobs:
         run: npm run test:php
 
   coverage-php:
-    name: 'PHP Coverage'
-    runs-on: ubuntu-latest
+    name: "PHP Coverage"
+    runs-on: [self-hosted]
     env:
       # Coverage is version-agnostic, so one representative cell is enough.
-      WP_ENV_PHP_VERSION: '8.3'
+      WP_ENV_PHP_VERSION: "8.3"
+      # Must live on the shared work emptyDir mounted by ARC's dind containerMode
+      # so the dind sidecar can resolve the bind-mount source paths wp-env generates.
+      WP_ENV_HOME: /home/runner/_work/_temp/wp-env-home
     steps:
       - name: Checkout
         uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
 
+      - name: Set up Docker Compose
+        uses: docker/setup-compose-action@4eb059ff7f16592f9c84d5ca339c53cb7c5064e2 # v2.3.0
+        with:
+          version: v2.36.2
+
       - name: Setup Node
         uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6
         with:
-          node-version: '20'
+          node-version: "20"
 
       - name: Install Node dependencies
         run: npm ci