Questions regarding cache.nixos.org

Poscat · March 23, 2020, 3:01am

who is operating cache.nixos.org?
who decides which derivation gets built and cached?
is there a mailing list that tracks the decisions made by those operators?

danieldk · March 23, 2020, 5:55am

NixOS/nixpkgs/blob/3c4c703368637f6440f554c97357d2a265d72d90/pkgs/top-level/release.nix

/* This file defines the builds that constitute the Nixpkgs.
   Everything defined here ends up in the Nixpkgs channel.  Individual
   jobs can be tested by running:

   $ nix-build pkgs/top-level/release.nix -A <jobname>.<system>

   e.g.

   $ nix-build pkgs/top-level/release.nix -A coreutils.x86_64-linux
*/
{ nixpkgs ? { outPath = (import ../../lib).cleanSource ../..; revCount = 1234; shortRev = "abcdef"; revision = "0000000000000000000000000000000000000000"; }
, officialRelease ? false
  # The platforms for which we build Nixpkgs.
, supportedSystems ? [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" ]
, limitedSupportedSystems ? [ "i686-linux" ]
  # Strip most of attributes when evaluating to spare memory usage
, scrubJobs ? true
  # Attributes passed to nixpkgs. Don't build packages marked as unfree.
, nixpkgsArgs ? { config = { allowUnfree = false; inHydra = true; }; }
}:

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edolstra · March 23, 2020, 8:27am

It’s operated by the NixOS Foundation, though cache.nixos.org is backed by an S3 bucket sponsored by Infor, and served by a CDN sponsored by Fastly. There is no mailing list, but most of the infrastructure is defined here: GitHub - NixOS/infra: NixOS configurations for nixos.org and its servers