Setup shared cache for Composer dependencies

.github/workflows/main.yml

@@ -1,4 +1,4 @@
-name: Lint, analyse and test
+name: Lint, test and analyse
 
 on:
   push:
@@ -9,30 +9,63 @@ on:
       - master
 
 jobs:
+  install_dependencies:
+    runs-on: ubuntu-latest
+    name: Install dependencies
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install dependencies
+        run: docker compose run --rm builder composer install
+      - name: Cache installed dependencies
+        id: cache-composer-dependencies
+        uses: actions/cache/save@v4
+        with:
+          path: |
+            ./vendor/
+            ./composer.lock
+          key: ${{ runner.os }}-build-composer-dependencies-${{ github.sha }}
   linting:
+    needs: install_dependencies
     runs-on: ubuntu-latest
     name: Linting
     steps:
-      - uses: actions/checkout@v3
-      - name: Setup dependencies
-        run: docker compose run --rm builder composer install
+      - uses: actions/cache/restore@v4
+        name: Restore cached dependencies
+        with:
+          path: |
+            ./vendor/
+            ./composer.lock
+          key: ${{ runner.os }}-build-composer-dependencies-${{ github.sha }}
+      - uses: actions/checkout@v4
       - name: Run linting
         run: docker compose run --rm builder composer test:lint
   testing:
+    needs: install_dependencies
     runs-on: ubuntu-latest
     name: Testing
     steps:
-      - uses: actions/checkout@v3
-      - name: Setup dependencies
-        run: docker compose run --rm builder composer install
+      - uses: actions/cache/restore@v4
+        name: Restore cached dependencies
+        with:
+          path: |
+            ./vendor/
+            ./composer.lock
+          key: ${{ runner.os }}-build-composer-dependencies-${{ github.sha }}
+      - uses: actions/checkout@v4
       - name: Run testing
         run: docker compose run --rm builder composer test:phpunit
   analysis:
+    needs: install_dependencies
     runs-on: ubuntu-latest
     name: Analysis
     steps:
-      - uses: actions/checkout@v3
-      - name: Setup dependencies
-        run: docker compose run --rm builder composer install
+      - uses: actions/cache/restore@v4
+        name: Restore cached dependencies
+        with:
+          path: |
+            ./vendor/
+            ./composer.lock
+          key: ${{ runner.os }}-build-composer-dependencies-${{ github.sha }}
+      - uses: actions/checkout@v4
       - name: Run analysis
         run: docker compose run --rm builder composer test:phpstan