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|
{ config, pkgs, lib, ... }:
with lib;
{
options.vuizvui = {
modifyNixPath = mkOption {
type = types.bool;
default = true;
description = ''
Whether to modify NIX_PATH for vuizvui, so that <nixpkgs> points
to the path within the Nix channel instead of the
<literal>nixpkgs</literal> or <literal>nixos</literal> channel from the
root user.
'';
};
enableGlobalNixpkgsConfig = mkOption {
type = types.bool;
default = false;
description = ''
Enabling this links <literal>nixos-config</literal> to be used by
<literal>nixpkgs-config</literal>, which essentially means that
attributes defined in <option>nixpkgs.config</option> are also in effect
for user environments.
'';
};
channelName = mkOption {
type = types.str;
default = "vuizvui";
description = ''
The channel name which is used to refer to <literal>vuizvui</literal>.
'';
};
requiresTests = mkOption {
type = types.listOf types.package;
default = [];
description = ''
A list of derivations which have to succeed in order to trigger a
channel update for the current configuration/machine.
'';
};
};
config = let
nixpkgs = import ../../nixpkgs-path.nix;
system = config.nixpkgs.system;
in {
nixpkgs.config.packageOverrides = pkgs: {
# XXX: REAAAALLLY UGLY hack to force the Headcounter Hydra to rebuild GHC
# and all its packages and not use binary substitution.
haskellPackages = pkgs.haskellPackages.override {
ghc = pkgs.haskellPackages.ghc.overrideDerivation (const {
forceRebuild = true;
});
};
inherit (import ../../pkgs {
# We need to make sure to incorporate other package overrides,
# otherwise we are unable to override packages in vuizvui.*.
pkgs = pkgs // config.nixpkgs.config.packageOverrides pkgs;
}) vuizvui;
};
nix.binaryCachePublicKeys = [
"headcounter.org:/7YANMvnQnyvcVB6rgFTdb8p5LG1OTXaO+21CaOSBzg="
];
environment.variables.NIXPKGS_CONFIG = let
nixpkgsCfg = toString (pkgs.writeText "nixpkgs-try-config.nix" ''
if (builtins.tryEval <nixpkgs-config>).success
then import <nixpkgs-config>
else {}
'');
in mkIf config.vuizvui.enableGlobalNixpkgsConfig (mkForce nixpkgsCfg);
nix.nixPath = let
rootChannelsPath = "/nix/var/nix/profiles/per-user/root/channels";
channelPath = "${rootChannelsPath}/${config.vuizvui.channelName}";
nixosConfig = "/etc/nixos/configuration.nix";
nixpkgsConfig = "nixpkgs-config=${pkgs.writeText "nixpkgs-config.nix" ''
(import ${nixpkgs}/nixos/lib/eval-config.nix {
modules = [ ${nixosConfig} ];
}).config.nixpkgs.config
''}";
nixPath = [
"vuizvui=${channelPath}"
"nixpkgs=${channelPath}/nixpkgs"
"nixos-config=${nixosConfig}"
rootChannelsPath
] ++ optional config.vuizvui.enableGlobalNixpkgsConfig nixpkgsConfig;
in mkIf config.vuizvui.modifyNixPath (mkOverride 90 nixPath);
_module.args.tests = import ../../lib/get-tests.nix {
inherit nixpkgs system;
};
};
}
|
