nh clean all --keep-daily

[bbigras]

I use nixos-rebuild switch multiple times a day instead of using nixos-rebuild test so I end up with multiple generations per day.

So for me, it would be nice to be able to only keep 1 generation (the latest) per day. Normally, the last one of the day is the one I'm happy with (unless I'm tweaking stuff before and after midnight).

[bbigras]

Right now, I'm running:

nix-env -p /nix/var/nix/profiles/system --list-generations \
  | awk '{print $1, $2}' \
  | sort -k2,2 -k1,1rn \
  | awk 'seen[$2]++ {print $1}' \
  | xargs -r nix-env -p /nix/var/nix/profiles/system --delete-generations

before nh clean all --keep-since 7d --keep 4