Dynamically Generate Matrix for CI Jobs (#14)

* Another attempt at dynamic matrix

* Missed a bracket

* Use the JQ Step properly

* Rookie error of mixing up - and _

* Echo output

* Revert to old and define outputs a bit differently

* Some refactoring

* Strip out excess echos

.github/workflows/terraform.yml

@@ -10,12 +10,29 @@ on:
     branches: main
 
 jobs:
+  determine-modules:
+    name: "Determine Terraform Modules"
+    runs-on: ubuntu-latest
+    outputs:
+      modules: ${{ steps.output-var.outputs.modules }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Pass to Var
+        id: output-var
+        env:
+          ECHO_OUTPUT: ${{ steps.get-json.outputs.value }}
+        run: |
+          JQ_OUTPUT=$(ls ./Terraform_modules/ | jq -R -s -c 'split("\n")[:-1]')
+          echo "modules=$JQ_OUTPUT" >> $GITHUB_OUTPUT
+
   terraform-check:
     name: "Check Terraform"
     runs-on: ubuntu-latest
+    needs: determine-modules
     strategy:
       matrix:
-        module: ["ec2_instance", "rds_serverless_cluster", "vpc_subnets"]
+        module: ${{ fromJSON(needs.determine-modules.outputs.modules) }}
     defaults:
       run:
         working-directory: "Terraform_modules/${{ matrix.module }}"