importer: Remove requirement for filename and lineno metadata #101
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Importers have to add "filename" and "lineno" metadata entries to the generated entries. However, these are used only by the the bencount.core.data.entry_sortkey() sorting key function when entries are written in the ledger. As the Python sort implementation is guaranteed stable, this is at best not useful and actually problematic when the source document is sorted in reverse date order and the importer does not explicitly takes this in account. Implementing a sortkey() function that does not use these metadata entries removes the need for the importers to generate them and avoids the issue with reverse sorting of entries for the same day. Propagate the change to the base classes and example importers.
This was referenced Feb 6, 2022
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Importers have to add "filename" and "lineno" metadata entries to the
generated entries. However, these are used only by the the
bencount.core.data.entry_sortkey() sorting key function when entries
are written in the ledger.
As the Python sort implementation is guaranteed stable, this is at
best not useful and actually problematic when the source document is
sorted in reverse date order and the importer does not explicitly
takes this in account.
Implementing a sortkey() function that does not use these metadata
entries removes the need for the importers to generate them and avoids
the issue with reverse sorting of entries for the same day.
Propagate the change to the base classes and example importers.