Haven't done any programming in Rust lately. I was about to rewrite
[gitodo] in Rust, but I don't think that's going to happen.

[gitodo]: https://uninformativ.de/git/gitodo

I'm rather confident that gitodo will be replaced by [be].

[be]: https://uninformativ.de/git/bin-pub/file/be.html

As the comment in "be" says, it still depends on "highcal" from gitodo.
Let's see what I can do about that. Maybe rewrite that in Rust? Give Go
a try? C? Just keep the current implementation in Ruby, because ...
performance is not an issue here?

I don't know.