Ability to force expire individual tarballs and artifacts downloaded with builtins.fetch*

[copumpkin]

I think we can set the (somewhat awkwardly named) tarball-ttl option today but that applies to all artifacts downloaded that way. It would be nice to be able to expire them manually. I could probably modify the .info file to shift the timestamp back, but that feels awkward.

cc @edolstra

[copumpkin]

I think the mechanism today would be to rm ${XDG_CACHE_DIR:-~/.cache}/nix/tarballs/* or something.

[asmodehn]

So, what would be the simplest way today to get one specific tarball to expire, in order to re-download it often/everytime ?

[deliciouslytyped]

An optional ttl argument for fetch functions sounds sufficient?

[stale]

I marked this as stale due to inactivity. → More info

[nixos-discourse]

This issue has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/local-flake-based-nix-search-nix-run-and-nix-shell/13433/11

[stale]

I marked this as stale due to inactivity. → More info

[toraritte]

Still relevant. Currently my only solution is to delete the offending cached file from the Nix store via nix-store --delete.

[nixos-discourse]

This issue has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/infinite-loop-when-importing-fetched-nix-expression-with-relative-path/27032/1