Fix neigbors_leiden_umap stub (#1026)

Author: DriesSchaumont

CHANGELOG.md

@@ -18,6 +18,8 @@
 
 * Bump viash to 0.9.4. This adds support for nextflow versions starting major version 25.01 and fixes an issue where an integer being passed to a argument with `type: double` resulted in an error (PR #1016).
 
+* Fix running `neigbors_leiden_umap` workflow with `-stub` enabled (PR #1026).
+
 # openpipelines 2.1.0
 
 ## BREAKING CHANGES

src/workflows/multiomics/neighbors_leiden_umap/main.nf

@@ -5,8 +5,10 @@ workflow run_wf {
   main:
   output_ch = input_ch
     | map {id, state ->
-      assert (state.leiden_resolution.isEmpty() || state.obs_cluster?.trim()):
-        "When leiden_resolution is set, obs_cluster must also be defined."
+      if (!workflow.stubRun) {
+        assert (state.leiden_resolution.isEmpty() || state.obs_cluster?.trim()):
+          "When leiden_resolution is set, obs_cluster must also be defined."
+      }
       [id, state]
     }
     | map {id, state ->