{ config, pkgs, lib, ... }:
with lib;
let
rootChannelsPath = "/nix/var/nix/profiles/per-user/root/channels";
channelPath = "${rootChannelsPath}/${config.vuizvui.channelName}";
in {
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
nixpkgs or nixos channel from the
root user.
'';
};
enableGlobalNixpkgsConfig = mkOption {
type = types.bool;
default = false;
description = ''
Enabling this links nixos-config to be used by
nixpkgs-config, which essentially means that
attributes defined in are also in effect
for user environments.
'';
};
channelName = mkOption {
type = types.str;
default = "vuizvui";
description = ''
The channel name which is used to refer to vuizvui.
'';
};
};
config = {
# Expose all packages in ../../pkgs as pkgs.vuizvui in modules.
nixpkgs.overlays = singleton (pkgs: const {
vuizvui = import ../../pkgs { inherit pkgs; };
});
nix.binaryCaches = [ "https://headcounter.org/hydra/" ];
nix.binaryCachePublicKeys = [
"headcounter.org:/7YANMvnQnyvcVB6rgFTdb8p5LG1OTXaO+21CaOSBzg="
];
environment.variables.NIXPKGS_CONFIG = let
nixpkgsCfg = toString (pkgs.writeText "nixpkgs-try-config.nix" ''
if (builtins.tryEval ).success
then import
else {}
'');
in mkIf config.vuizvui.enableGlobalNixpkgsConfig (mkForce nixpkgsCfg);
nix.nixPath = let
nixosConfig = "/etc/nixos/configuration.nix";
nixpkgsConfig = "nixpkgs-config=${pkgs.writeText "nixpkgs-config.nix" ''
(import ${pkgs.path}/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);
# correct path used by command-not-found which is enabled by default
programs.command-not-found.dbPath =
mkDefault "${channelPath}/nixpkgs/programs.sqlite";
};
}