home(steam): port to home

home/steam/nixos.nix

@@ -0,0 +1,29 @@
+{ pkgs
+, lib
+, config
+, ... }: with lib; let
+  cfg = config.home.steam;
+  persist = [ ".steam" ".local/share/Steam" ];
+in {
+  imports = [ ./config.nix ];
+
+  options.home.steam = {
+    enable = mkEnableOption "steam software and environment";
+    package = mkOption {
+      type = with types; package;
+      default = config.programs.steam.package;
+      description = "steam package";
+    };
+    allUsers = mkEnableOption "set up for all users";
+  };
+
+  config = {
+    users.homeModules = [
+      # this module passes steam configuration to home-manager
+      { passthrough.steam = cfg; }
+    ];
+
+    users.home.persist.directories = with cfg; mkIf (enable && allUsers) persist;
+    users.home.persistApp.directories = with cfg; mkIf (enable && !allUsers) persist;
+  };
+}