Dumping: Check non-empty input node repositories

[GeigerJ2]

Adding a small check to the process-dumping that incoming nodes actually do have associated NodeRepositorys (that might actually not even be necessary, probably all Nodes have that by construction 🤔), and that these repositories actually do hold objects. This avoids empty node_inputs directories being created when dumping.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.09%. Comparing base (f43a510) to head (c2c49a3).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6734      +/-   ##
==========================================
+ Coverage   78.09%   78.09%   +0.01%     
==========================================
  Files         564      564              
  Lines       42544    42549       +5     
==========================================
+ Hits        33219    33224       +5     
  Misses       9325     9325              

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[unkcpz]

Suggested change

	all_input_nodes = input_links.all_nodes()
	all_have_repositories = all([hasattr(node.base, 'repository') for node in all_input_nodes])
	if all_have_repositories:
	non_empty_repository = any([len(node.base.repository.list_objects()) > 0 for node in all_input_nodes])
	if non_empty_repository:
	self._dump_calculation_io(
	parent_path=output_path / io_dump_mapping.inputs,
	link_triples=input_links,
	)
	all_input_nodes = input_links.all_nodes()
	if (
	all(hasattr(node.base, 'repository') for node in all_input_nodes)
	and any(len(node.base.repository.list_objects()) for node in all_input_nodes)
	):
	self._dump_calculation_io(
	parent_path=output_path / io_dump_mapping.inputs,
	link_triples=input_links,
	)

nitpick: I think it can be simplified by merging two if (seems even hard to read, if you think so, feel free to ignore)?