From 4ebbfbebf46dc5cd84ed5c51162c08fd2ecf0542 Mon Sep 17 00:00:00 2001
From: lassulus <lassulus@lassul.us>
Date: Mon, 4 Apr 2022 18:19:51 +0200
Subject: [PATCH] l: add themes.nix

---
 lass/2configs/baseX.nix  |  1 +
 lass/2configs/themes.nix | 46 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)
 create mode 100644 lass/2configs/themes.nix

diff --git a/lass/2configs/baseX.nix b/lass/2configs/baseX.nix
index 249410371..cbe592d52 100644
--- a/lass/2configs/baseX.nix
+++ b/lass/2configs/baseX.nix
@@ -13,6 +13,7 @@ in {
     ./pipewire.nix
     ./tmux.nix
     ./xmonad.nix
+    ./themes.nix
     {
       krebs.per-user.lass.packages = [
         pkgs.sshuttle
diff --git a/lass/2configs/themes.nix b/lass/2configs/themes.nix
new file mode 100644
index 000000000..dd98b2ef2
--- /dev/null
+++ b/lass/2configs/themes.nix
@@ -0,0 +1,46 @@
+{ config, lib, pkgs, ... }: let
+
+    switch-theme = pkgs.writers.writeDashBin "switch-theme" ''
+      if test -e "/etc/themes/$1"; then
+        ${pkgs.rsync}/bin/rsync --chown=lass:users -a --delete "/etc/themes/$1/" /var/theme/config/
+        echo "$1" > /var/theme/current_theme
+        chown lass:users /var/theme/current_theme
+        ${pkgs.procps}/bin/pkill -HUP xsettingsd
+
+      else
+        echo "theme $1 not found"
+      fi
+    '';
+
+in {
+  systemd.services.xsettingsd = {
+    wantedBy = [ "multi-user.target" ];
+    environment.DISPLAY = ":0";
+    serviceConfig = {
+      ExecStart = "${pkgs.xsettingsd}/bin/xsettingsd -c /var/theme/config/xsettings.conf";
+      User = "lass";
+    };
+  };
+  systemd.tmpfiles.rules = [
+    "d /var/theme/ 755 lass users"
+  ];
+  environment.systemPackages = [
+    switch-theme
+  ];
+  environment.etc = {
+    "themes/light/xsettings.conf".text = ''
+      Net/ThemeName "Adwaita" 
+    '';
+    "themes/dark/xsettings.conf".text = ''
+      Net/ThemeName "Adwaita-dark" 
+    '';
+  };
+  system.activationScripts.theme.text = ''
+    if test -e /var/theme/current_theme; then
+      ${switch-theme}/bin/switch-theme "$(cat /var/theme/current_theme)" ||
+      ${switch-theme}/bin/switch-theme dark
+    else
+      ${switch-theme}/bin/switch-theme dark
+    fi
+  '';
+}