[zephyrot]

@rev.bob.

Stupid question time:
If the goal is to avoid duplicates, because Calibre is making duplicate files, why not remove the Calibre-made files? That should be much easier to control.

I do want to delete files created by humans. I'm completely fine with calibre generated files. Calibre does it in the way I like, which is something I can't tell about humans

The two things I'm practically guaranteed to do on any book are hack the cover-page code and standardize the OPF metadata. I have my own template for both, and "fixing" the metadata usually involves going online to find the missing pieces. For instance, I love having the dc:description field populated with the publisher's blurb, in case I need a reminder, and I frequently have to change the text of the author's name from "Last, First" to "First Last" and add the opf:file-as="Last, First" attribute. I'm also funny about dc:identifier, in that I prefer for it to be the ISBN (where available) instead of a UUID, and I set all my series book titles to "Series X: Title" - where X is the place in the series, with a leading zero if necessary. That last mod is critical for me, as it keeps me organized. Then there are the CSS mods, where if the book uses something other than medium/default for the size of the main text, I go through and rescale everything.

Maybe you know already, but with "Last,First" books I use calibre bulk metadata editor to properly fix them. I do prefer also "First Last" as you. With the series, I was using Calibre Metadata Plugboards to add the series name and index to filenames when uploading files to my old reader. My new ereader does automatic collections with the series names, so now I only have to put the series index in the filename so they are sorted when I check the ereader library. Removing the series name from the filename was a good thing, there are crazy long series names out there (World of Darkness, I'm looking at you!).

@Terisa de morgan:

But the main point is: the removed file isn't "sobrecubierta" in English, but the standard name and extension (that's important: jacket.xhtml works, jacket.html doesn't) that calibre uses for including this jacket. You're not removing something which is a normal part of the book, but something calibre has added.

I agree with you. Certainly, "file names + extension" has to be properly set in the plugin. Thanks for pointing it out.
Poor Kiwidude, we are giving him lot of troubles

@BetterRed & Jswolf:

Jswolf: That would be a nice option to have Modidy ePub present us with a list of files in the ePub for us to select which ones we want removed and then they can be removed from the OPF and NCX ToC (if there).

I think you would need a page preview too, I just looked at an epub from PG, the file names give no clue as to what's in the file.

My personal taste is that "preview" or "file selection" windows would disturb you when processing many books at once, as you have to review one after another and not all books might have the same name for the offending files. Maybe you can use "calibre epub editor" or Sygil when adding one or two books at once. That's what I was doing before finding Kiwidude plugin.
But I do understand your points here.

Poor Kiwidude, indeed