Refactor Terraform workflow to use GitHub Actions setup and cache

.github/workflows/terraform_plan.yaml

@@ -28,16 +28,6 @@ jobs:
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
-      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@v3
-
-      - uses: CSVD/gh-actions-setup-node@v3
-        with:
-           node-version: 16
-
-      - name: blow up .terraform
-        run: rm -rf ${{ github.workspace }}/.terraform || echo "nope"
-
       - name: Setup AWS Credentials
         id: aws_credentials
         run: |
@@ -48,25 +38,27 @@ jobs:
           echo AWS_SECRET_ACCESS_KEY=`jq -r '.SecretAccessKey' aws_credentials.json` >> $GITHUB_ENV
           aws configure set aws_session_token `jq -r '.Token' aws_credentials.json`
           echo AWS_SESSION_TOKEN=`jq -r '.Token' aws_credentials.json` >> $GITHUB_ENV
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
 
       - name: Setup GITHUB Credentials
         id: github_credentials
         run: |
           echo GITHUB_TOKEN=$(python encode_jwt.py "$GITHUB_APP_PEM_FILE" "$GITHUB_APP_INSTALLATION_ID" "$GITHUB_BASE_URL") >> $GITHUB_ENV
 
       - name: Terraform Init
-        id: init
-        run: /opt/tfenv/bin/terraform init -upgrade
-
-      - name: Terraform Validate
-        id: validate
-        run: /opt/tfenv/bin/terraform validate
+        uses: CSVD/terraform-init@main
+        id: terraform_init
+        with:
+          terraform_version: "1.9.1"
+          workspace: ${{ vars.terraform_workspace }}
+          setup_terraform: true
+          terraform_init: true
 
       - name: Terraform Plan
-        id: plan
-        run: /opt/tfenv/bin/terraform plan -var-file=varfiles/${{ vars.terraform_workspace }}.tfvars
-
-#       - name: Terraform Apply
-#         id: plan
-#         run: /opt/tfenv/bin/terraform apply -auto-approve -var-file=varfiles/${{ vars.terraform_workspace }}.tfvars
-#         continue-on-error: true
+        uses: CSVD/terraform-plan@main
+        with:
+          terraform_version: "1.9.1"
+          workspace: ${{ vars.terraform_workspace }}
+          commit_sha: ${{ steps.terraform_init.outputs.commit_sha }}
+          varfile: varfiles/${{ vars.terraform_workspace }}.tfvars
+          download_cache: true