Check if false_path exists before writing

Author: mvdbeek

lib/galaxy/job_execution/setup.py

@@ -288,9 +288,9 @@ def compute_outputs(self) -> None:
         job_outputs = []
         for da in job.output_datasets + job.output_library_datasets:
             da_false_path = dataset_path_rewriter.rewrite_dataset_path(da.dataset, "output")
-            #if da_false_path:
-            #    with open(da_false_path, "wb"):
-            #        pass
+            if da_false_path and not os.path.exists(da_false_path):
+                with open(da_false_path, "ab"):
+                    pass
             mutable = da.dataset.dataset.external_filename is None
             dataset_path = DatasetPath(
                 da.dataset.dataset.id,