Nix based CI on PRs! - #14
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This reduces overall time, but more imporantly disk usage. Which is currently preventing CI from running at all.
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February 20, 2026 20:43
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I like having formatting / linting checks as separate GitHub checks, so that 1) we get quick feedback if formatting fails 2) we still know if code builds / test pass. Is that something that would be possible in this setup ? |
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Yes it is! |
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Looks very good! |
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Adds a Nix-based CI! This CI simply runs
nix build .#hydraJobs.x86_64-linux.required.native, which you can also run locally! Together with that change, it also cleans up a bunch of stuff from theouroboros-consensusNix infra that we don't really need/want. Primarily the different GHC versions, and the cross compilation stuff.It does format and lint our code, which is nice. And also explains changes I made to existing Haskell code.
Finally, to avoid excessive build times, a cachix cache was created and is pushed to in CI. If you ever update the index states, this CI might fail due to disk usage, in which case you will likely have to push the nix store paths to the cachix store manually.