fix: revise half-baked PR #1400

Author: oesteban

.circleci/config.yml

@@ -764,8 +764,15 @@ jobs:
           no_output_timeout: 40m
           command: |
             docker push nipreps/mriqc:latest
-            docker tag nipreps/mriqc nipreps/mriqc:$CIRCLE_TAG
-            docker push nipreps/mriqc:$CIRCLE_TAG
+
+            # only tag & push if CIRCLE_TAG is set
+            if [ -n "${CIRCLE_TAG:-}" ]; then
+              echo "Tagging and pushing ${CIRCLE_TAG}..."
+              docker tag nipreps/mriqc nipreps/mriqc:"$CIRCLE_TAG"
+              docker push nipreps/mriqc:"$CIRCLE_TAG"
+            else
+              echo "CIRCLE_TAG is undefined - skipping tagged push"
+            fi
 
 workflows:
   version: 2