13976: Add code comment about only_real in upload_dependencies

[arvados.git] / sdk / cwl / arvados_cwl / runner.py

diff --git a/sdk/cwl/arvados_cwl/runner.py b/sdk/cwl/arvados_cwl/runner.py
index 79be881912eba88100b75423715869128ceb6c1c..29c0535d93c8a0ff164af01949ae152f056591d7 100644 (file)
--- a/sdk/cwl/arvados_cwl/runner.py
+++ b/sdk/cwl/arvados_cwl/runner.py
@@ -129,6 +129,8 @@ def upload_dependencies(arvrunner, name, document_loader,
 
     sc = []
     def only_real(obj):
+        # Only interested in local files than need to be uploaded,
+        # don't include file literals, keep references, etc.
         if obj.get("location", "").startswith("file:"):
             sc.append(obj)