remove creation of very_first_start.dap

dap/accumulator.py

@@ -30,9 +30,8 @@ def accumulate(_accumulator_host, accumulator_port): #TODO: accumulator_host is
 
     poller.register(accumulator_socket, zmq.POLLIN)
 
-    run_name_before = "very_first_start"
-    fname_output = f"{OUTPUT_DIR_NAME}/{run_name_before}.dap"
-    output_dap = open_new_file(fname_output)
+    run_name_before = None
+    output_dap = None
 
     n_frames_received = 0
 
@@ -40,7 +39,8 @@ def accumulate(_accumulator_host, accumulator_port): #TODO: accumulator_host is
         events = dict(poller.poll(10)) # check for worker output every 0.01 seconds
 
         if accumulator_socket not in events:
-            output_dap.flush() # may be too intensive
+            if output_dap:
+                output_dap.flush() # may be too intensive
             continue
 
         results = accumulator_socket.recv_json(FLAGS)
@@ -52,8 +52,9 @@ def accumulate(_accumulator_host, accumulator_port): #TODO: accumulator_host is
 
         if run_name != run_name_before:
             run_name_before = run_name
-            fname_output = f"{OUTPUT_DIR_NAME}/{detector}/{run_name_before}.dap"
-            output_dap.close()
+            fname_output = f"{OUTPUT_DIR_NAME}/{detector}/{run_name}.dap"
+            if output_dap:
+                output_dap.close()
             output_dap = open_new_file(fname_output)
 
         res_is_good_frame   = results.get("is_good_frame", -1)