Install deps in validator workflow

Author: szepeviktor

.github/workflows/validator.yml

@@ -17,6 +17,30 @@ jobs:
         with:
           ref: ${{ github.head_ref }}
 
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.2
+          coverage: none
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GH_TOKEN_FOR_COMPOSER_FOR_PRIVATE_REPOS }}
+
+      - name: Get Composer cache directory
+        id: composer-cache
+        run: |
+          echo "composer_dir={$(composer config cache-files-dir)}" >> $GITHUB_OUTPUT
+
+      - name: Retrieve Composer‘s cache
+        uses: actions/cache@v3
+        with:
+          path: ${{ steps.composer-cache.outputs.composer_dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-composer-
+
+      - name: Install composer dependencies
+        run: "composer install --no-interaction --no-progress --no-scripts"
+
       - name: Validate ruleset
         uses: szepeviktor/[email protected]
         with: