Gate Dagster+ deploy on credential presence

The serverless deploy failed hard (Invalid URL '/graphql') whenever the
DAGSTER_CLOUD_URL / DAGSTER_CLOUD_API_TOKEN secrets are unset, blocking
every PR. Add a guard step so the deploy is skipped (green) when the
secrets are absent, and only runs once they are configured.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: jirhiker

.github/workflows/dagster-cloud-branch-deployments.yml

@@ -22,8 +22,19 @@ jobs:
     outputs:
       build_info: ${{ steps.parse-workspace.outputs.build_info }}
     steps:
+      - name: Check Dagster+ credentials present
+        id: guard
+        run: |
+          if [ -n "${{ secrets.DAGSTER_CLOUD_URL }}" ] && [ -n "${{ secrets.DAGSTER_CLOUD_API_TOKEN }}" ]; then
+            echo "enabled=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "::notice::Dagster+ secrets (DAGSTER_CLOUD_URL / DAGSTER_CLOUD_API_TOKEN) not set; skipping deploy."
+            echo "enabled=false" >> "$GITHUB_OUTPUT"
+          fi
+
       - name: Prerun Checks
         id: prerun
+        if: steps.guard.outputs.enabled == 'true'
         uses: dagster-io/dagster-cloud-action/actions/utils/prerun@v0.1
 
       - name: Launch Docker Deploy

.github/workflows/dagster-cloud-deploy.yml

@@ -25,8 +25,19 @@ jobs:
     outputs:
       build_info: ${{ steps.parse-workspace.outputs.build_info }}
     steps:
+      - name: Check Dagster+ credentials present
+        id: guard
+        run: |
+          if [ -n "${{ secrets.DAGSTER_CLOUD_URL }}" ] && [ -n "${{ secrets.DAGSTER_CLOUD_API_TOKEN }}" ]; then
+            echo "enabled=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "::notice::Dagster+ secrets (DAGSTER_CLOUD_URL / DAGSTER_CLOUD_API_TOKEN) not set; skipping deploy."
+            echo "enabled=false" >> "$GITHUB_OUTPUT"
+          fi
+
       - name: Prerun Checks
         id: prerun
+        if: steps.guard.outputs.enabled == 'true'
         uses: dagster-io/dagster-cloud-action/actions/utils/prerun@v0.1
 
       - name: Launch Docker Deploy