PEER-242: Update action script

Signed-off-by: SeeuSim <[email protected]>

Author: SeeuSim

.github/workflows/build-deploy-docker.yaml

@@ -188,21 +188,32 @@ jobs:
 
       - name: Setup GCloud
         uses: google-github-actions/setup-gcloud@v2
-        if: ${{ contains(github.ref, 'main') && github.event.pull_request.title != 'Feedback' && env.IS_GKE_CLUSTER_UP }}
+        if: ${{ contains(github.ref, 'main') && github.event.pull_request.title != 'Feedback' }}
         with: 
           service_account_key: ${{ secrets.GKE_SA_KEY }}
           project_id: ${{ secrets.GKE_PROJECT }}
 
       - name: Get GKE creds
         uses: google-github-actions/get-gke-credentials@v2
-        if: ${{ contains(github.ref, 'main') && github.event.pull_request.title != 'Feedback' && env.IS_GKE_CLUSTER_UP }}
+        if: ${{ contains(github.ref, 'main') && github.event.pull_request.title != 'Feedback' }}
         with:
           cluster_name: ${{ secrets.GKE_CLUSTER }}
           location: ${{ secrets.GKE_ZONE }}
           credentials: ${{ secrets.GKE_SA_KEY }}
+
+      - name: Detect GKE Cluster
+        if: ${{ contains(github.ref, 'main') && github.event.pull_request.title != 'Feedback' }}
+        id: detect-gke
+        run: |-
+          is_up="$(gcloud container clusters list | grep cs3219-g16)"
+          if [[ -z "$is_up" ]]; then
+            echo "output=false" >> $GITHUB_OUTPUT
+          else
+            echo "output=true" >> $GITHUB_OUTPUT
+          fi
       
       - name: Deploy to GKE
-        if: ${{ contains(github.ref, 'main') && github.event.pull_request.title != 'Feedback' && env.IS_GKE_CLUSTER_UP }}
+        if: ${{ contains(github.ref, 'main') && github.event.pull_request.title != 'Feedback' && steps.detect-gke.output == 'true' }}
         run: |-
           service="${{ matrix.package }}"
           deployment="frontend"