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| infowski | OK, so... This is somewhat related to binary cache self-hosting... For context - I've been experimenting with setting up a solution for automatic/transparent local cache sharing across machines in the same LAN, via avahi-based wrapper around Harmonia. This worked great during my initial testing.
Now I've noticed that somehow most of the paths in my local nix stores (ones that I am 99% certain were pulled from https://cache.nixos.org) don't actually contain any signatures (looking at Harmonia narinfo / ValidPaths table inspection in /nix/var/nix/db/db.sqlite). If I manually run nix store copy-sigs --all -s https://cache.nixos.org/ I see cache.nixos.org-1 signature for all the paths I check again. Any new paths that were just fetched during eg. nix-shell -p ... also have correct sigs...
I see this behaviour on at least 2 vastly different configs, on different long-running machines (nix 2.18 & nixos 23.11, nix 2.28.4 & nixos 25.05) - db.sqlite usually has sigs for ~10% of paths (1747/13143, 2790/22476 - after nix-collect-garbage + copy-sigs on latter mentioned above it's up to 9938/19420)
Any idea what could be a reason for that? Maybe some GC/optimise-related behaviour? I had a quick glance at cppnix source but don't see anything obvious...
I'll go back to trying to reproduce this, but if anyone has any hints...
| 12:11:03 |
| infowski | (also, never [knowingly?] used --no-check-sigs, and all my nix.settings options are on nixos defaults) | 12:12:47 |
| infowski | * (also, never [knowingly?] used --no-check-sigs, and all my nix.settings options are on nixos defaults; also sorry for wall of text) | 12:13:27 |
| infowski | Hmmm... Most of those paths in question come from nixos-rebuild updates... Wonder if that matters... 🤔 | 12:23:46 |
| 12 Sep 2025 |
| Theo Paris left the room. | 01:43:06 |
| infowski | OK, nevermind, I think I am just dumb 🙃 | 11:12:19 |
