1. The source code of that plugin explicitly says:
file_types = set(['epub', 'lrf']) # The file types that this plugin will be applied to
I do not see a reason why it would not work on epub. Is there one?
2. Can you point exactly to a file that is a FileTypePlugin in calibre source tree? The only one I found with grep is HTML2ZIP plugin, which is a part of
pluginize/src/calibre/customize/builtins.py
Where else to look?
Thank you!
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