fix: hanlde if first add git tag

.github/workflows/tests.yml

@@ -22,29 +22,32 @@ jobs:
       DEPLOYMENT_NAME: keyweave-${{ github.run_id }}
     steps:
       - uses: actions/checkout@v3
-
       - name: Fetch complete history
         run: git fetch --prune --unshallow
-  
-      - name: Get last deployed commit
-        id: last_deployed
-        run: echo "LAST_DEPLOYED_COMMIT=$(git rev-list -n 1 deployed)" >> $GITHUB_ENV
-  
+      - name: Check for deployed tag
+        id: check_tag
+        run: |
+          if git rev-parse --verify deployed >/dev/null 2>&1; then
+            echo "DEPLOYED_TAG_EXISTS=true" >> $GITHUB_ENV
+            echo "LAST_DEPLOYED_COMMIT=$(git rev-list -n 1 deployed)" >> $GITHUB_ENV
+          else
+            echo "DEPLOYED_TAG_EXISTS=false" >> $GITHUB_ENV
+          fi
       - name: Check for changes in bicep folder
+        if: env.DEPLOYED_TAG_EXISTS == 'true'
         run: |
           if git diff --quiet $LAST_DEPLOYED_COMMIT HEAD -- bicep/ ; then
             echo "NO_CHANGES=true" >> $GITHUB_ENV
           else
             echo "NO_CHANGES=false" >> $GITHUB_ENV
-  
-      - if: env.NO_CHANGES == 'false'
+          fi
+      - if: env.DEPLOYED_TAG_EXISTS == 'false' || env.NO_CHANGES == 'false'
         uses: azure/login@v1
         with:
           client-id: ${{ secrets.AZURE_CLIENT_ID }}
           tenant-id: ${{ secrets.AZURE_TENANT_ID }}
           subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
-  
-      - if: env.NO_CHANGES == 'false'
+      - if: env.DEPLOYED_TAG_EXISTS == 'false' || env.NO_CHANGES == 'false'
         name: Deploy Bicep template
         uses: azure/arm-deploy@v1
         with:
@@ -52,8 +55,7 @@ jobs:
           region: ${{ env.LOCATION }}
           template: bicep/main.bicep
           deploymentName: ${{ env.DEPLOYMENT_NAME }}
-  
-      - if: env.NO_CHANGES == 'false'
+      - if: env.DEPLOYED_TAG_EXISTS == 'false' || env.NO_CHANGES == 'false'
         name: Tag Deployment
         run: |
           git tag -fa deployed -m "Deployed to Azure"