This format uses the path matching algorithm as the .gitignore format.
The paths need to be prefixed with a / to become absolute, otherwise it
will match all of these files.
The paths will also match any of the sub-paths by default so it's not
necessary to use the `*` like in bash globbing.
This sets up the Darwin-maintainers team as CODEOWNERS for Darwin paths. So anyone in that team will get notified (instead of just listing individuals).
/cc @org/darwin-maintainers
Some time ago GitHub introduced the CODEOWNERS file. The file is similar
to the MAINTAINERS file that was proposed in
https://github.com/NixOS/nixpkgs/issues/13602. Code owners will
automatically receive a review request.