feat(ci): implement active checks for previews readiness (#3949)

.github/workflows/ci-cd-trigger.yml

@@ -171,6 +171,7 @@ jobs:
       - publish-dist
       - lint-test-build
     if: ${{ github.event_name == 'pull_request' }}
+    timeout-minutes: 60
     name: '(CD) comment preview links'
     steps:
       - name: Find Comment
@@ -180,6 +181,29 @@ jobs:
           issue-number: ${{ github.event.pull_request.number }}
           body-includes: Previews
 
+      - name: Wait for deployments
+        run: |
+          # https://stackoverflow.com/questions/3183444/check-for-valid-link-url
+          regex='(https?|ftp|file)://[-[:alnum:]\+&@#/%?=~_|!:,.;]*[-[:alnum:]\+&@#/%=~_|]'
+          if [[ "${{ needs.lint-test-build.outputs.preview_governance }}" =~ $regex ]]; then
+            until curl -L --fail "${{ needs.lint-test-build.outputs.preview_governance }}"; do
+              echo "waiting for governance preview"
+              sleep 5
+            done
+          fi
+          if [[ "${{ needs.lint-test-build.outputs.preview_explorer }}" =~ $regex ]]; then
+            until curl -L --fail "${{ needs.lint-test-build.outputs.preview_explorer }}"; do
+              echo "waiting for explorer preview"
+              sleep 5
+            done
+          fi
+          if [[ "${{ needs.lint-test-build.outputs.preview_trading }}" =~ $regex ]]; then
+            until curl -L --fail "${{ needs.lint-test-build.outputs.preview_trading }}"; do
+              echo "waiting for trading preview"
+              sleep 5
+            done
+          fi
+
       - name: Create comment
         uses: peter-evans/create-or-update-comment@v3
         if: ${{ steps.fc.outputs.comment-id == 0 }}
@@ -191,15 +215,9 @@ jobs:
             * explorer: ${{ needs.lint-test-build.outputs.preview_explorer  }}
             * trading: ${{ needs.lint-test-build.outputs.preview_trading }}
 
+  # Report single result at the end, to avoid mess with required checks in PR
   cypress-check:
     name: '(CI) cypress - check'
-    runs-on: ubuntu-latest
-    needs: cypress
-    steps:
-      - run: echo Done!
-
-  # Report single result at the end, to avoid mess with required checks in PR
-  cypress-result:
     if: ${{ always() }}
     needs: cypress
     runs-on: ubuntu-22.04