feat(tvix): filter src via lib.fileset HEAD r/8169 canon

Previously changing any file (including default.nix or README.md) would
cause Nix to compute a different derivation path, resulting in needing
to (very often redundantly) rebuild the crate/package. With this change
you can expect less rebuilds.

Crate2nix currently does its own insufficient src filtering and it does
not expose an API to override the filtering, so instead I created a
function that we can use to override the src to have stricter filtering.

I implemented the filtering for all of the workspace members, if you
want to modify any of them, please read the lib.fileset docs
https://nixos.org/manual/nixpkgs/unstable/#sec-functions-library-fileset

Change-Id: I7ab5a0064a76938d14f7f65801be9f3a5c3bad04
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11714
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>

0 files changed, 0 insertions, 0 deletions