| 15 Aug 2025 |
 fzakaria | Sergei Zimmerman (xokdvium): i finished https://github.com/NixOS/nix/pull/13757
John Ericson i kind of went a bit wild in that and used c++ to setup the test case... There's so little examples of how to setup a Store etc.. in a unit test.
I wanted to see what that's like rather than just a functional bash test.
| 05:22:12 |
| fzakaria | 1 line fix, 200 line test | 05:22:52 |
 John Ericson | there is a GTest class in libstore test support that opens a store btw | 05:24:05 |
| John Ericson | maybe that will help? | 05:24:09 |
| John Ericson | * there is a GTest class in libstore-test-support that opens a store btw | 05:24:21 |
| John Ericson | I forget whether it is a dummy:// store | 05:24:28 |
| John Ericson | (got to go to bed now, though) | 05:26:08 |
| fzakaria | gnight! I think the Input has to actually write to the store ? so dummy:// isn't good enough (i think?) | 05:27:54 |
| fzakaria | I thought maybe there could be memory:// but I got it all working... the auto registering of things so you can just do "auto" was really confusing to learn | 05:28:21 |
| John Ericson | I have a draft PR for that | 05:36:32 |
| John Ericson | or maybe it's not even draft | 05:36:38 |
| John Ericson | feel free to go take it | 05:36:43 |
| John Ericson | we just needed a use-case for it, and now we have one | 05:36:50 |
| John Ericson | (it was always gonna be unit testing) | 05:37:02 |
|  muneer changed their profile picture. | 10:32:21 |
| fzakaria | i can take it up after; right now having the store be temporary directory for just fetching inputs feels okay -- but I want it. | 15:35:40 |
| fzakaria | is there a way to use Nix as a C++ lib in a separate project? | 15:35:49 |
 Sergei Zimmerman (xokdvium) | In reply to @fzakaria:one.ems.host
is there a way to use Nix as a C++ lib in a separate project? Pretty easy to do so. Just needs pkg-config integration in your build system. I assume you are going to use bazel? | 15:44:21 |
| fzakaria | No; i'm happy to use Meson, Cmake or w/e.
(Bazel would be cool though)
Having a nix derivation that builds it even cooler. | 15:48:42 |
| fzakaria | (I'm not familiar with pkg-config)
One more question: How does one run a particular flake check only.
I'm trying to validate a check that is failing | 15:49:12 |
| fzakaria | nix build -f flake.nix checks.x86_64-linux.nix-fetchers-tests-run
error: attribute 'checks' in selection path 'checks.x86_64-linux.nix-fetchers-tests-run' not found
| 15:50:35 |
 dramforever | nix build .#checks.x86_64-linux.nix-fetchers-tests-run | 15:51:50 |
| fzakaria | ty | 15:51:56 |
| dramforever | quote that if you shell doesn't like it | 15:52:08 |
| Sergei Zimmerman (xokdvium) | Both cmake and meson are pretty easy to set up. Recent enough cmake made this much easier with https://cmake.org/cmake/help/latest/module/FindPkgConfig.html | 15:54:20 |
| Sergei Zimmerman (xokdvium) | You can also do nix build -f . checks.x86_64-linux.nix-fetchers-tests-run, since we are using flake-compat | 15:55:14 |
| Sergei Zimmerman (xokdvium) | Or (nix-build) | 15:55:30 |
| Sergei Zimmerman (xokdvium) | * Or nix-build | 15:55:36 |
| fzakaria | it assumes it was installed on the system ?
So Nix installed via the system will install the shared libraries and headers or is there a -dev version needed. | 15:56:09 |
| fzakaria | (If i were to use Nix as a buildInput) | 15:56:21 |
