gtk2: allow configuration of gtkrc file

Closes #519

modules/misc/gtk.nix

@@ -92,6 +92,18 @@ in {
             <filename>~/.gtkrc-2.0</filename>.
           '';
         };
+
+        configLocation = mkOption {
+          type = types.path;
+          default = "${config.home.homeDirectory}/.gtkrc-2.0";
+          defaultText =
+            literalExample ''"''${config.home.homeDirectory}/.gtkrc-2.0"'';
+          example =
+            literalExample ''"''${config.xdg.configHome}/gtk-2.0/gtkrc"'';
+          description = ''
+            The location to put the GTK configuration file.
+          '';
+        };
       };
 
       gtk3 = {
@@ -154,10 +166,12 @@ in {
     home.packages = optionalPackage cfg.font ++ optionalPackage cfg.theme
       ++ optionalPackage cfg.iconTheme;
 
-    home.file.".gtkrc-2.0".text =
+    home.file.${cfg2.configLocation}.text =
       concatStringsSep "\n" (mapAttrsToList formatGtk2Option ini) + "\n"
       + cfg2.extraConfig;
 
+    home.sessionVariables.GTK2_RC_FILES = cfg2.configLocation;
+
     xdg.configFile."gtk-3.0/settings.ini".text =
       toGtk3Ini { Settings = ini // cfg3.extraConfig; };
 

tests/default.nix

@@ -86,6 +86,7 @@ import nmt {
   ] ++ lib.optionals pkgs.stdenv.hostPlatform.isLinux [
     ./modules/config/i18n
     ./modules/misc/debug
+    ./modules/misc/gtk
     ./modules/misc/numlock
     ./modules/misc/pam
     ./modules/misc/qt
@@ -106,10 +107,10 @@ import nmt {
     ./modules/services/fluidsynth
     ./modules/services/kanshi
     ./modules/services/lieer
-    ./modules/services/redshift-gammastep
     ./modules/services/pbgopy
     ./modules/services/playerctld
     ./modules/services/polybar
+    ./modules/services/redshift-gammastep
     ./modules/services/sxhkd
     ./modules/services/window-managers/i3
     ./modules/services/window-managers/sway

tests/modules/misc/gtk/default.nix

@@ -0,0 +1,5 @@
+{
+  gtk2-basic-config = ./gtk2-basic-config.nix;
+  gtk2-config-file-location = ./gtk2-config-file-location.nix;
+}
+

tests/modules/misc/gtk/gtk-basic-config-expected.conf

@@ -0,0 +1 @@
+gtk-can-change-accels = 1

tests/modules/misc/gtk/gtk2-basic-config.nix

@@ -0,0 +1,21 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+  config = {
+    gtk = {
+      enable = true;
+      gtk2.extraConfig = "gtk-can-change-accels = 1";
+    };
+
+    nmt.script = ''
+      assertFileExists home-files/.gtkrc-2.0
+      assertFileContents home-files/.gtkrc-2.0 ${
+        ./gtk-basic-config-expected.conf
+      } 
+      assertFileRegex home-path/etc/profile.d/hm-session-vars.sh \
+          'GTK2_RC_FILES=.*/.gtkrc-2.0'
+    '';
+  };
+}

tests/modules/misc/gtk/gtk2-config-file-location.nix

@@ -0,0 +1,16 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+  config = {
+    gtk.enable = true;
+    gtk.gtk2.configLocation = "${config.xdg.configHome}/gtk-2.0/gtkrc";
+
+    nmt.script = ''
+      assertFileExists home-files/.config/gtk-2.0/gtkrc
+      assertFileRegex home-path/etc/profile.d/hm-session-vars.sh \
+          'GTK2_RC_FILES=.*/\.config/gtk-2.0/gtkrc'
+    '';
+  };
+}