nix-config/modules/programs/steam/default.nix

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{ config, lib, pkgs, ... }:
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let
cfg = config.my.programs.steam;
in
{
options.my.programs.steam = with lib; {
enable = mkEnableOption "steam configuration";
dataDir = mkOption {
type = types.str;
default = "$XDG_DATA_HOME/steamlib";
example = "/mnt/steam/";
description = ''
Which directory should be used as HOME to run steam.
'';
};
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};
config = lib.mkIf cfg.enable {
programs.steam = {
enable = true;
};
environment.systemPackages = builtins.map lib.hiPrio [
# Respect XDG conventions, leave my HOME alone
(pkgs.writeScriptBin "steam" ''
#!/bin/sh
mkdir -p "${cfg.dataDir}"
HOME="${cfg.dataDir}" exec ${pkgs.steam}/bin/steam "$@"
'')
# Same, for GOG and other such games
(pkgs.writeScriptBin "steam-run" ''
#!/bin/sh
mkdir -p "${cfg.dataDir}"
HOME="${cfg.dataDir}" exec ${pkgs.steam-run-native}/bin/steam-run "$@"
'')
];
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};
}