[wrap-git] vs git submodule

[lucascolley]

In which scenarios would a [wrap-git] file under subprojects/ be preferable to a git submodule in the same location, and vice versa?

[lucascolley]

I found scipy/scipy#19255 (comment) which has effectively already answered this question. Perhaps there is more to say.

[dcbaker]

The only thing I'd add to that answer is whether you expect users to be able to find your dependencies on the system or not. If you do expect pkg-config to find them, then using a git-wrap avoids people needing to initialize submodules they wont use. Otherwise I think Eli summed it up.