Optional cover image inclusion

[claell]

I saw that a cover image can be included with the \coverimage{} command.

Some publishers require it to be included in the EPUB.

However, other publishers don't require it, and I think it might lead to double covers in the end result.

As some publishers have different requirements for the EPUBs in general (like EPUB version), I start different runs of tex4ebook on the same LaTeX file to create the output.

To still be able to rely on the same LaTeX file, some switch to include or not include the image in different runs of tex4ebook might be useful. Or can the cover image possibly be passed directly from the command line if needed?

[claell]

I didn't really try to always add a cover image, though. Maybe that won't give the negative side effects as I thought. Will report back on that.

[michal-h21]

In this case, I would use the \CoverMetadata{filename} command in the configuration file. It doesn't include the cover image in the flow of the ebook file, but reader systems will use it in the bookshelf view.