merging step of 2022 hlt2 reprocessing production

GaudiConf/python/GaudiConf/mergeMDF.py

+###############################################################################
+# (c) Copyright 2023 CERN for the benefit of the LHCb Collaboration           #
+#                                                                             #
+# This software is distributed under the terms of the GNU General Public      #
+# Licence version 3 (GPL Version 3), copied verbatim in the file "COPYING".   #
+#                                                                             #
+# In applying this licence, CERN does not waive the privileges and immunities #
+# granted to it by virtue of its status as an Intergovernmental Organization  #
+# or submit itself to any jurisdiction.                                       #
+###############################################################################
+from GaudiConf.LbExec import Options
+from PyConf.application import configure_input, configure, mdf_writer
+from PyConf.control_flow import CompositeNode
+
+
+def mdf(options: Options):
+    """
+    Merges output of HLT2 reprocessing jobs in production
+    """
+    writer = mdf_writer(options.output_file, "/Event/DAQ/RawEvent")
+    node = CompositeNode('MDFMerger', [writer])
+    config = configure_input(options)
+    config.update(configure(options, node))
+    return config