I'd like to be able to run lsst_build without having to specify --exclusion-map and --version-git-repo on the command-line every time. While I can do that with an alias, I think it should be something built-in.

Ideally, for --exclusion-map, there'd be a search path and some sort of syntax for having higher-priority config locations override lower-priority options.

(As you might have guessed, this will be the first of many feature requests for lsst-build as I try to switch from my own bot tool and find things that seem to be missing).