Updated Workflow Letest

Author: Ayukhandal00

.github/workflows/build-deploy.yml

@@ -100,6 +100,30 @@ jobs:
             echo "Green slot already exists"
           fi
 
+      # ------------------- Determine Idle Slot -------------------
+      - name: Determine Idle Slot
+        id: idle-slot
+        run: |
+          RESOURCE_GROUP=${{ secrets.AZURE_RESOURCE_GROUP }}
+          APP_NAME=${{ secrets.AZURE_APP_NAME }}
+
+          PROD_IMAGE=$(az webapp config container show \
+            --name $APP_NAME \
+            --resource-group $RESOURCE_GROUP \
+            --query "linuxFxVersion" -o tsv)
+
+          SLOT_BLUE_IMAGE=$(az webapp config container show --name $APP_NAME --resource-group $RESOURCE_GROUP --slot blue --query "linuxFxVersion" -o tsv)
+          SLOT_GREEN_IMAGE=$(az webapp config container show --name $APP_NAME --resource-group $RESOURCE_GROUP --slot green --query "linuxFxVersion" -o tsv)
+
+          if [[ "$SLOT_BLUE_IMAGE" == "$PROD_IMAGE" ]]; then
+            IDLE_SLOT="green"
+          else
+            IDLE_SLOT="blue"
+          fi
+
+          echo "slot_name=$IDLE_SLOT" >> $GITHUB_ENV
+          echo "Idle slot chosen: $IDLE_SLOT"
+
       # ------------------- Deploy to Idle Slot -------------------
       - name: Deploy to Idle Slot
         run: |