| 7 May 2022 |
 Zhaofeng Li | Any links to docs on this nix apply? | 02:29:50 |
 David Arnold (blaggacao) | Afaic, it's not exposed anywhere yet. I can ask for more details next week. | 02:32:48 |
| David Arnold (blaggacao) | I assume the main benefit is that the cache integrity of the flake is not destroyed. | 02:33:09 |
| David Arnold (blaggacao) | Ot came up during a discussion about nix-eval-cavhe. | 02:33:22 |
| David Arnold (blaggacao) | * Ot came up during a discussion about nix-eval-cache. | 02:33:31 |
| David Arnold (blaggacao) | Maybe this? https://github.com/NixOS/nix/blob/master/src/nix/bundle.cc#L78 | 02:37:29 |
| David Arnold (blaggacao) | Anyway, the design pattern is pretty similar / the same. | 02:38:03 |
| Zhaofeng Li | Taking a look in a bit, thanks 👍 | 02:44:01 |
| David Arnold (blaggacao) | Looks like that is the function, the counterpart is pretty simple: https://github.com/NixOS/bundlers/blob/master/flake.nix | 02:48:42 |
| David Arnold (blaggacao) | So in essence, one flake.is "wrapped around" the other. | 02:49:00 |
| David Arnold (blaggacao) | * So in essence, one flake is "wrapped around" the other. | 02:49:10 |
| David Arnold (blaggacao) | You could also think of it in terms of 'passing arguments to flakes'. | 02:49:37 |
| David Arnold (blaggacao) | Or 'flake inheritence' | 02:49:51 |
 dantefromhell | CRTified: The downside is this woukd only work with raspberrys plus I dont use the SD-Cards (long term reliability) since USB boot is now possible. | 10:41:56 |
| dantefromhell | From research it feels possible to get NixOS LIVE booted on all devices (kexec, pxe, usb sticks) so my hope is to build something nix-based from there for installation & management. | 10:46:14 |
 CRTified | In reply to @dantefromhell:matrix.org
CRTified: The downside is this woukd only work with raspberrys plus I dont use the SD-Cards (long term reliability) since USB boot is now possible. You are free to create arbitrary layouts, so you can dd it on other media, too. I'm using RockPis and boot them from NVMe :) But I get your point, the same thing for x86 might be a bit more effort I think | 10:47:07 |
| dantefromhell | The first issue I recognized with colmena is the hostname match check for local deploys.
That breaks fresh installs and machine renames, no? | 10:47:21 |
| dantefromhell | CRTified: the dd approach is also suboptimal with differing disc size. it needs some post-processing... | 10:48:47 |
| CRTified | The aarch64 installer image autoresizes on boot | 10:49:21 |
| dantefromhell | CRTified: and stuff like ZFS raidZ might be impossible (would need to test) | 10:50:17 |
| CRTified | https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/installer/sd-card/sd-image.nix#L242-L267 here's what's done to expand on boot | 10:51:01 |
| Zhaofeng Li | In reply to @dantefromhell:matrix.org
The first issue I recognized with colmena is the hostname match check for local deploys.
That breaks fresh installs and machine renames, no? When renaming machines, you can override which node apply-local selects with --node. For fresh installs, you need to run the activation script when chrooted into the new root (ex: the external script I linked) and the normal logic doesn't work. | 18:21:34 |
| 8 May 2022 |
| dantefromhell | * yeah I feel there's this recursive dependency on nix all over the nix ecosystem | 11:20:53 |
| dantefromhell | In reply to @zhaofeng:zhaofeng.li
When renaming machines, you can override which node apply-local selects with --node. For fresh installs, you need to run the activation script when chrooted into the new root (ex: the external script I linked) and the normal logic doesn't work. Thx for the details. Will check them out ASAP | 11:21:57 |
| 10 May 2022 |
|  andi- left the room. | 18:56:41 |
| 13 May 2022 |
|  snartvellental joined the room. | 08:02:27 |
| snartvellental | hey folks, using colmena with joy, i am using it in CI and was wondering how people cache colmena builds on CI servers? | 08:03:02 |
 Linux Hackerman | snartvellental: you can use a Nix binary cache. Unfortunately there's no stable interface for populating a binary cache currently, but you can put `extra-substituters = file:///path/to/persistent/cache/dir/?trusted=1` in a nix.conf that gets picked up for the build, and use `nix copy --option experimental-features nix-command --all --to file:///path/to/persistent/cache/dir/` at the end of the build | 08:07:35 |
| Linux Hackerman | You can also use some S3-compatible storage rather than local storage if you prefer | 08:08:10 |
| snartvellental | I have played around with cachix in the past, thanks for your message Linux Hackerman , I will have a look :) | 08:08:58 |
