Commit ea9594ba authored by Christian Kögler's avatar Christian Kögler
Browse files

nixos/nix: restructure default for system-features 

Assign default for option system-features at the common place. It
allows use to re-use the default value in cause of setting the option.
parent ad2781b7

nixos/modules/config/nix.nix

+15 −15
Original line number Diff line number Diff line
@@ -27,7 +27,6 @@ let 
    literalExpression

    mapAttrsToList

    mkAfter

    mkDefault

    mkIf

    mkOption

    mkRenamedOptionModuleWith
@@ -316,15 +315,25 @@ in 


            system-features = mkOption {

              type = types.listOf types.str;

              example = [ "kvm" "big-parallel" "gccarch-skylake" ];

              default =

                [

                  "nixos-test"

                  "benchmark"

                  "big-parallel"

                  "kvm"

                ]

                ++ optionals (pkgs.stdenv.hostPlatform ? gcc.arch) (

                  # a builder can run code for `gcc.arch` and inferior architectures

                  [ "gccarch-${pkgs.stdenv.hostPlatform.gcc.arch}" ]

                  ++ map (x: "gccarch-${x}") (

                    systems.architectures.inferiors.${pkgs.stdenv.hostPlatform.gcc.arch} or [ ]

                  )

                );

              defaultText = literalExpression ''[ "nixos-test" "benchmark" "big-parallel" "kvm" "gccarch-<arch>" ]'';

              description = ''

                The set of features supported by the machine. Derivations

                can express dependencies on system features through the

                `requiredSystemFeatures` attribute.



                By default, pseudo-features `nixos-test`, `benchmark`,

                and `big-parallel` used in Nixpkgs are set, `kvm`

                is also included if it is available.

              '';

            };
@@ -350,7 +359,6 @@ in 
            use-sandbox = true;

            show-trace = true;



            system-features = [ "big-parallel" "kvm" "recursive-nix" ];

            sandbox-paths = [ "/bin/sh=''${pkgs.busybox-sandbox-shell.out}/bin/busybox" ];

          }

        '';
@@ -377,14 +385,6 @@ in 
      trusted-public-keys = [ "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=" ];

      trusted-users = [ "root" ];

      substituters = mkAfter [ "https://cache.nixos.org/" ];

      system-features = mkDefault (

        [ "nixos-test" "benchmark" "big-parallel" "kvm" ] ++

        optionals (pkgs.stdenv.hostPlatform ? gcc.arch) (

          # a builder can run code for `gcc.arch` and inferior architectures

          [ "gccarch-${pkgs.stdenv.hostPlatform.gcc.arch}" ] ++

          map (x: "gccarch-${x}") (systems.architectures.inferiors.${pkgs.stdenv.hostPlatform.gcc.arch} or [])

        )

      );

    };

  };

}