adding caching

.github/workflows/formatting.yml

@@ -7,15 +7,37 @@ on:
     branches: [ "main" ]
 
 jobs:
-  build:
+  formatting:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+    - name: Checkout Source
+      uses: actions/checkout@v4
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: "3.11"
+
+    - name: Cache pip dependencies
+      uses: actions/cache@v4
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-formatting-pip-${{ hashFiles('.pre-commit-config.yaml') }}
+        restore-keys: |
+          ${{ runner.os }}-formatting-pip-
+
+    - name: Cache pre-commit
+      uses: actions/cache@v4
+      with:
+        path: ~/.cache/pre-commit
+        key: ${{ runner.os }}-pre-commit-${{ hashFiles('.pre-commit-config.yaml') }}
+        restore-keys: |
+          ${{ runner.os }}-pre-commit-
+
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip isort
-        python -m pip install pre-commit
+        python -m pip install --upgrade pip
+        python -m pip install pre-commit isort
+
     - name: Run pre-commit
       run: python -m pre_commit run --all-files