Most of the tools, including Jekyll itself are Ruby gems, so that part is pretty clear: those gems are under whatever license they're under. I have a Gemfile calling those dependencies.
Likewise, there are files in the repository (like some of those under
_plugins) have licenses in the comments. Those are pretty clear, too.
I'd like to present the license like this:
Everything I wrote that isn't content is under MIT, except of course the two cases mentioned above. (Specifically, "not content" can be delineated as not existing in the "_posts", "_pages", or "images" directories.)
Everything I wrote that is content is under CC-BY-NC-SA 4.0.
How do I correctly phrase this? I thought about making submodules of the aforementioned directories, but that's a bit of a chore.