Need a tool to merge small art files
DUNE ask to create a tool for them to merger small art files into one big file.
The user requested below:
1) if the user operates on a dataset basis, the resulting files should be registered to SAM, and also a new dataset should be created for the resulting files: e.g. $ new-project.py —-merge-art-files —-input-dataset small_art_files_dataset --output-dataset merged_art_files_dataset --output-path /pnfs/dune/persistent/users/PATH_TO_TARGET_DIR
2) If the user operates on a file list, the files should by default not declared to SAM, but provide an option to do so if the input files are in SAM (so that the file lineage can be correctly kept).