fix eww

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

@@ -2,6 +2,16 @@
 let
   ensureDaemon = pkgs.custom.eww-ensure-daemon;
 
+  ewwCleanStart = pkgs.writeShellScript "eww-clean-start" ''
+    uid="$(${pkgs.coreutils}/bin/id -u)"
+    runtime_dir="''${XDG_RUNTIME_DIR:-/run/user/$uid}"
+
+    ${pkgs.procps}/bin/pkill -TERM -x -u "$uid" eww >/dev/null 2>&1 || true
+    ${pkgs.coreutils}/bin/sleep 0.2
+    ${pkgs.procps}/bin/pkill -KILL -x -u "$uid" eww >/dev/null 2>&1 || true
+    ${pkgs.coreutils}/bin/rm -f "$runtime_dir"/eww-server_*
+  '';
+
   openOnCurrentScreen = pkgs.writeShellScriptBin "eww-open-on-current-screen" ''
     window="$1"
     shift
@@ -75,9 +85,9 @@ in {
       };
       Service = {
         Type = "simple";
-        ExecStartPre = "${pkgs.bash}/bin/bash -c 'rm -f \"\${XDG_RUNTIME_DIR:-/run/user/$(id -u)}\"/eww-server_*'";
+        ExecStartPre = "${ewwCleanStart}";
         ExecStart = "${lib.getExe pkgs.eww} daemon --no-daemonize";
-        Restart = "on-failure";
+        Restart = "always";
         RestartSec = 1;
       };
       Install.WantedBy = [ "graphical-session.target" ];

packages/eww-ensure-daemon/default.nix

@@ -1,19 +1,58 @@
-{ lib, writeShellScriptBin, eww, systemd }:
+{ lib
+, writeShellScriptBin
+, coreutils
+, eww
+, procps
+, systemd
+, util-linux
+}:
 
 # `eww open` silently becomes a NEW daemon when it can't reach the socket,
 # rebinding the same socket path and orphaning the previous daemon. The old
 # daemon keeps rendering its layer-shell surfaces but no longer answers any
 # `eww close` — that is the "zombie panel I can't close" / "bar opened twice".
-# Every open path must go through here first, so the socket is always live
+# Every open path must go through here first, so the socket is always live and
-# before a client touches it and no client ever self-daemonizes.
+# owned by the managed user service before a client touches it.
 writeShellScriptBin "eww-ensure-daemon" ''
-  ${lib.getExe eww} ping >/dev/null 2>&1 && exit 0
+  eww=${lib.getExe eww}
+  uid="$(${coreutils}/bin/id -u)"
+  runtime_dir="''${XDG_RUNTIME_DIR:-/run/user/$uid}"
+  lock_file="$runtime_dir/eww-ensure-daemon.lock"
 
-  ${systemd}/bin/systemctl --user start eww.service >/dev/null 2>&1 || true
+  service_active() {
+    ${systemd}/bin/systemctl --user is-active --quiet eww.service
+  }
 
-  for _ in $(seq 1 100); do
+  daemon_healthy() {
-    ${lib.getExe eww} ping >/dev/null 2>&1 && exit 0
+    "$eww" ping >/dev/null 2>&1 && service_active
-    sleep 0.1
+  }
-  done
+
-  exit 1
+  wait_for_ping() {
+    i=0
+    while [ "$i" -lt 100 ]; do
+      daemon_healthy && return 0
+      ${coreutils}/bin/sleep 0.1
+      i=$((i + 1))
+    done
+    return 1
+  }
+
+  daemon_healthy && exit 0
+
+  ${coreutils}/bin/mkdir -p "$runtime_dir"
+  (
+    ${util-linux}/bin/flock -x 9
+
+    daemon_healthy && exit 0
+
+    ${systemd}/bin/systemctl --user stop eww.service >/dev/null 2>&1 || true
+    ${procps}/bin/pkill -TERM -x -u "$uid" eww >/dev/null 2>&1 || true
+    ${coreutils}/bin/sleep 0.2
+    ${procps}/bin/pkill -KILL -x -u "$uid" eww >/dev/null 2>&1 || true
+    ${coreutils}/bin/rm -f "$runtime_dir"/eww-server_*
+
+    ${systemd}/bin/systemctl --user reset-failed eww.service >/dev/null 2>&1 || true
+    ${systemd}/bin/systemctl --user start eww.service >/dev/null 2>&1 || true
+    wait_for_ping
+  ) 9>"$lock_file"
 ''