Creating DataURI for image inlining

[niko-dunixi]

Should solve the issue for this preprocesssor and create a better
user-experience. Also enables other downstream renderers to work
agnostically and not only the html renderer. Can convert text files to
data-uri but will still defer to the original text embedding method to
preserve historical functionality

• Preprocessor output files are deleted when hbs renderer is called (from mdBook > 0.3.1) rust-lang/mdBook#1087

[sytsereitsma]

Thanks! This was on my list too. I don't often have time to look at the PRs here, so bear with me if my responses take a while.
That said I'd prefer the data URIs to be an optional output format. I think a TOML config flag would be nice for this. Reason being data URIs are quite an arcane thing (at least to me) and I'd like to keep support for regular image generation.

Can you make that work?

[niko-dunixi]

Hello, @sytsereitsma! I can probably get that working, but I'm not sure what my bandwidth will be these next couple sprints. I'll try to squeeze that in. If you want, we could create a feature branch and make this a work-in-progress to eventually get merged into master so it can be incrementally worked on, but also still be co-located in the same repository. That's your call though

[sytsereitsma]

It's a feature branch now isn't it 😉
Just push your changes to it whenever you can find time.

I'll convert the PR to a draft

[sytsereitsma]

Hi Paul,
Added the configurable bit myself. Thanks again.