nixos/environment: set GTK_DATA_PREFIX

Many desktop environment modules are already setting
this so it already makes sense to just do this globally.

6 files changed, 2 insertions, 29 deletions

diff --git a/nixos/modules/programs/environment.nix b/nixos/modules/programs/environment.nix
index 5a11c7cdabc..d92c4189159 100644
--- a/nixos/modules/programs/environment.nix
+++ b/nixos/modules/programs/environment.nix
@@ -22,6 +22,7 @@ in
         EDITOR = mkDefault "nano";
         XCURSOR_PATH = [ "$HOME/.icons" ];
         XDG_CONFIG_DIRS = [ "/etc/xdg" ]; # needs to be before profile-relative paths to allow changes through environment.etc
+        GTK_DATA_PREFIX = "${config.system.path}"; # needed for gtk2 apps to find themes
       };
 
     environment.profiles = mkAfter
diff --git a/nixos/modules/services/editors/emacs.nix b/nixos/modules/services/editors/emacs.nix
index ba7ec967919..d791b387665 100644
--- a/nixos/modules/services/editors/emacs.nix
+++ b/nixos/modules/services/editors/emacs.nix
@@ -95,13 +95,7 @@ in {
 
     environment.systemPackages = [ cfg.package editorScript desktopApplicationFile ];
 
-    environment.variables = {
-      # This is required so that GTK applications launched from Emacs
-      # get properly themed:
-      GTK_DATA_PREFIX = "${config.system.path}";
-    } // (if cfg.defaultEditor then {
-        EDITOR = mkOverride 900 "${editorScript}/bin/emacseditor";
-      } else {});
+    environment.variables.EDITOR = mkIf cfg.defaultEditor (mkOverride 900 "${editorScript}/bin/emacseditor");
   };
 
   meta.doc = ./emacs.xml;
diff --git a/nixos/modules/services/x11/desktop-managers/enlightenment.nix b/nixos/modules/services/x11/desktop-managers/enlightenment.nix
index 9914b668709..3745069f6ea 100644
--- a/nixos/modules/services/x11/desktop-managers/enlightenment.nix
+++ b/nixos/modules/services/x11/desktop-managers/enlightenment.nix
@@ -48,10 +48,6 @@ in
     services.xserver.desktopManager.session = [
     { name = "Enlightenment";
       start = ''
-        # Set GTK_DATA_PREFIX so that GTK can find the themes
-        export GTK_DATA_PREFIX=${config.system.path}
-        # find theme engines
-        export GTK_PATH=${config.system.path}/lib/gtk-3.0:${config.system.path}/lib/gtk-2.0
         export XDG_MENU_PREFIX=e-
 
         export GST_PLUGIN_PATH="${GST_PLUGIN_PATH}"
diff --git a/nixos/modules/services/x11/desktop-managers/mate.nix b/nixos/modules/services/x11/desktop-managers/mate.nix
index d7a871c9c70..4563583e070 100644
--- a/nixos/modules/services/x11/desktop-managers/mate.nix
+++ b/nixos/modules/services/x11/desktop-managers/mate.nix
@@ -48,12 +48,6 @@ in
       name = "mate";
       bgSupport = true;
       start = ''
-        # Set GTK_DATA_PREFIX so that GTK can find the themes
-        export GTK_DATA_PREFIX=${config.system.path}
-
-        # Find theme engines
-        export GTK_PATH=${config.system.path}/lib/gtk-3.0:${config.system.path}/lib/gtk-2.0
-
         export XDG_MENU_PREFIX=mate-
 
         # Let caja find extensions
diff --git a/nixos/modules/services/x11/desktop-managers/xfce.nix b/nixos/modules/services/x11/desktop-managers/xfce.nix
index e3249aef50c..6965c6d2646 100644
--- a/nixos/modules/services/x11/desktop-managers/xfce.nix
+++ b/nixos/modules/services/x11/desktop-managers/xfce.nix
@@ -107,12 +107,6 @@ in
       start = ''
         ${cfg.extraSessionCommands}
 
-        # Set GTK_PATH so that GTK can find the theme engines.
-        export GTK_PATH="${config.system.path}/lib/gtk-2.0:${config.system.path}/lib/gtk-3.0"
-
-        # Set GTK_DATA_PREFIX so that GTK can find the Xfce themes.
-        export GTK_DATA_PREFIX=${config.system.path}
-
         ${pkgs.runtimeShell} ${pkgs.xfce.xinitrc} &
         waitPID=$!
       '';
diff --git a/nixos/modules/services/x11/desktop-managers/xfce4-14.nix b/nixos/modules/services/x11/desktop-managers/xfce4-14.nix
index 57d1268d655..458d4a2f422 100644
--- a/nixos/modules/services/x11/desktop-managers/xfce4-14.nix
+++ b/nixos/modules/services/x11/desktop-managers/xfce4-14.nix
@@ -114,12 +114,6 @@ in
       name = "xfce4-14";
       bgSupport = true;
       start = ''
-        # Set GTK_PATH so that GTK can find the theme engines.
-        export GTK_PATH="${config.system.path}/lib/gtk-2.0:${config.system.path}/lib/gtk-3.0"
-
-        # Set GTK_DATA_PREFIX so that GTK can find the Xfce themes.
-        export GTK_DATA_PREFIX=${config.system.path}
-
         ${pkgs.runtimeShell} ${pkgs.xfce4-14.xinitrc} &
         waitPID=$!
       '';