caching example

Signed-off-by: Rishav Dhar <19497993+rdhar@users.noreply.github.com>

.github/examples/pr_push_auth.yaml

@@ -1,5 +1,5 @@
 ---
-name: Trigger on pull_request (plan) and push (apply) events with Terraform and AWS authentication.
+name: Trigger on pull_request (plan) and push (apply) events with Terraform, AWS authentication and caching.
 
 on:
   pull_request:
@@ -27,6 +27,17 @@ jobs:
           aws-region: us-east-1
           role-to-assume: ${{ secrets.AWS_ROLE }}
 
+      - name: Create cache
+        run: |
+          mkdir --parents $HOME/.terraform.d/plugin-cache
+          echo "TF_PLUGIN_CACHE_DIR=$HOME/.terraform.d/plugin-cache" >> $GITHUB_ENV
+
+      - name: Cache TF
+        uses: actions/cache@v4
+        with:
+          path: ~/.terraform.d/plugin-cache
+          key: cache-tf-${{ runner.os }}-${{ hashFiles('path/to/directory/.terraform.lock.hcl') }}
+
       - name: Setup TF
         uses: hashicorp/setup-terraform@v3
 

README.md

@@ -86,7 +86,7 @@ The following workflows showcase common use cases, while a comprehensive list of
 <table>
   <tr>
     <td>
-      <a href="/.github/examples/pr_push_auth.yaml">Run on</a> <code>pull_request</code> (plan) and <code>push</code> (apply) events with Terraform and AWS <strong>authentication</strong>.
+      <a href="/.github/examples/pr_push_auth.yaml">Run on</a> <code>pull_request</code> (plan) and <code>push</code> (apply) events with Terraform, AWS <strong>authentication</strong> and <strong>caching</strong>.
     </td>
     <td>
       <a href="/.github/examples/pr_merge_matrix.yaml">Run on</a> <code>pull_request</code> (plan) and <code>merge_group</code> (apply) events with OpenTofu in <strong>matrix</strong> strategy.