Merge branch 'feature-s/3621-no_fuse_empty_set' into 'dev'

file.py task.py a some fuse failsafes.

Closes #3621

See merge request !359

server/web2py/applications/vidjil/controllers/file.py

@@ -451,7 +451,9 @@ def delete():
             config_ids = get_sequence_file_config_ids(request.vars["id"])
             db(db.results_file.sequence_file_id == request.vars["id"]).delete()
             db(db.sequence_file.id == request.vars["id"]).delete()
-            schedule_fuse(sample_set_ids, config_ids)
+            set_memberships = db(db.sample_set_membership.sample_set_id.belongs(sample_set_ids)).select()
+            non_empty_set_ids = [r.sample_set_id for r in set_memberships]
+            schedule_fuse(non_empty_set_ids, config_ids)
 
         res = {"redirect": "sample_set/index",
                "args" : { "id" : request.vars["redirect_sample_set_id"]},

server/web2py/applications/vidjil/models/task.py

@@ -646,6 +646,12 @@ def run_fuse(id_file, id_config, id_data, sample_set_id, clean_before=True, clea
             files += defs.DIR_RESULTS + row.results_file.data_file + " "
             sequence_file_list += str(row.results_file.sequence_file_id) + "_"
             
+    if files == "":
+        print("!!! Fuse failed: no files to fuse")
+        res = {"message": "[%s] c%s: 'fuse' FAILED - %s no files to fuse" % (id_data, id_config, output_file)}
+        log.error(res)
+        return "FAILED"
+
     try:
         fuse_cmd = db.config[id_config].fuse_command
         cmd = "python "+defs.DIR_FUSE+"/fuse.py -o "+ output_file + " " + fuse_cmd + " " + files