Better eww

modules/home/wayland/apps/eww/default.nix

@@ -1,9 +1,13 @@
 { lib, config, pkgs, ... }:
 let
+  ensureDaemon = pkgs.custom.eww-ensure-daemon;
+
   openOnCurrentScreen = pkgs.writeShellScriptBin "eww-open-on-current-screen" ''
     window="$1"
     shift
 
+    ${ensureDaemon}/bin/eww-ensure-daemon || exit 1
+
     screen="$(hyprctl monitors -j | ${lib.getExe pkgs.jq} -r '.[] | select(.focused == true) | .name' | head -n1)"
 
     if [ -n "$screen" ]; then
@@ -13,6 +17,21 @@ let
     exec ${lib.getExe pkgs.eww} open "$window" "$@"
   '';
 
+  # Escape hatch: tears down every eww process (including orphaned daemons that
+  # own unreachable surfaces), clears the stale socket, and brings back a single
+  # daemon with the bar. `pkill -x` matches the process name exactly so it can
+  # never match a wrapper script or a shell that merely mentions eww.
+  ewwReset = pkgs.writeShellScriptBin "eww-reset" ''
+    ${pkgs.systemd}/bin/systemctl --user stop eww.service >/dev/null 2>&1 || true
+    ${pkgs.procps}/bin/pkill -x -u "$(id -u)" eww >/dev/null 2>&1 || true
+    sleep 1
+    ${pkgs.procps}/bin/pkill -9 -x -u "$(id -u)" eww >/dev/null 2>&1 || true
+    rm -f "''${XDG_RUNTIME_DIR:-/run/user/$(id -u)}"/eww-server_*
+
+    ${ensureDaemon}/bin/eww-ensure-daemon || exit 1
+    exec ${lib.getExe pkgs.eww} open bar --screen 0
+  '';
+
   # Wraps a static script file with a bash launcher that prepends Nix store
   # bin dirs to PATH — keeps the source files unchanged.
   mkScript = name: src: inputs: pkgs.writeShellScriptBin name ''
@@ -43,7 +62,26 @@ let
 in {
 
   config = lib.mkIf (config.usercfg.wm == "Wayland") {
-    home.packages = [ pkgs.eww openOnCurrentScreen ];
+    home.packages = [ pkgs.eww openOnCurrentScreen ensureDaemon ewwReset ];
+
+    # One explicitly-managed daemon, so no client ever races to spawn a rival.
+    # ExecStartPre clears a socket left behind by an unclean exit, which would
+    # otherwise make the fresh daemon look reachable to clients before it binds.
+    systemd.user.services.eww = {
+      Unit = {
+        Description = "eww daemon";
+        PartOf = [ "graphical-session.target" ];
+        After = [ "graphical-session.target" ];
+      };
+      Service = {
+        Type = "simple";
+        ExecStartPre = "${pkgs.bash}/bin/bash -c 'rm -f \"\${XDG_RUNTIME_DIR:-/run/user/$(id -u)}\"/eww-server_*'";
+        ExecStart = "${lib.getExe pkgs.eww} daemon --no-daemonize";
+        Restart = "on-failure";
+        RestartSec = 1;
+      };
+      Install.WantedBy = [ "graphical-session.target" ];
+    };
 
     xdg.configFile = lib.mkMerge [
       {