Bundling fun with html5-parser

[Kevin Fenzi]

Greetings.

I maintain the calibre package (ebook library/reader) in Fedora.
Recently they added a dependency on a html5-parser package (also
maintained by the same upstream).

Review is at:

https://bugzilla.redhat.com/show_bug.cgi?id=1481046

html5-parser bundles a copy of
https://github.com/Sigil-Ebook/sigil-gumbo
which it then modifies and changes API on so it's no longer directly
compatible with sigil-gumbo as far as I can see.

sigul-gumbo is not in Fedora, but it in turn is a fork of gumbo-parser
that is in Fedora.

So, I cannot easily unbundle and package sigul-gumbo because its been
further modified in the html5-parser fork. I guess then my last thing to
do it just leave it bundled, but then do I need to have in a Provides
line here?

And I am asked to contact upstreams, I guess I should do this in reverse
order? ie, ask html5-parser upstream if they can upstream their changes
to sigul-gumbo and then ask sigul-gumbo if they want to ever merge back
to gumbo-parser?

(I am pretty sure I will get a big NO from both of them, but willing to
try if required).

Thoughts?

kevin