kde-frameworks.kdesu: search the daemon first in /run/wrappers/bin

If looking first in libexec, the eventually wrapped one in
/run/wrappers/bin can not be found.

This allows wrapping the daemon so that it can be run with sgid
privileges.

pkgs/development/libraries/kde-frameworks/kdesu-search-for-wrapped-daemon-first.patch

@@ -0,0 +1,38 @@
+From 01af4d2a098e5819c09bca37568941dcd4b89d0b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Jos=C3=A9=20Romildo=20Malaquias?= <malaquias@gmail.com>
+Date: Thu, 16 Jul 2020 13:21:42 -0300
+Subject: [PATCH] Search for the daemon first in /run/wrappers/bin
+
+If looking first in libexec, the eventually wrapped one in
+/run/wrappers/bin can not be found.
+---
+ src/client.cpp | 13 ++++++++-----
+ 1 file changed, 8 insertions(+), 5 deletions(-)
+
+diff --git a/src/client.cpp b/src/client.cpp
+index 44fbacd..6b5abf5 100644
+--- a/src/client.cpp
++++ b/src/client.cpp
+@@ -378,11 +378,14 @@ int KDEsuClient::stopServer()
+ 
+ static QString findDaemon()
+ {
+-    QString daemon = QFile::decodeName(CMAKE_INSTALL_FULL_LIBEXECDIR_KF5 "/kdesud");
+-    if (!QFile::exists(daemon)) { // if not in libexec, find it in PATH
+-        daemon = QStandardPaths::findExecutable(QStringLiteral("kdesud"));
+-        if (daemon.isEmpty()) {
+-            qWarning() << "kdesud daemon not found.";
++    QString daemon = QFile::decodeName("/run/wrappers/bin/kdesud");
++    if (!QFile::exists(daemon)) { // if not in wrappers
++        daemon = QFile::decodeName(CMAKE_INSTALL_FULL_LIBEXECDIR_KF5 "/kdesud");
++        if (!QFile::exists(daemon)) { // if not in libexec, find it in PATH
++            daemon = QStandardPaths::findExecutable(QStringLiteral("kdesud"));
++            if (daemon.isEmpty()) {
++                qWarning() << "kdesud daemon not found.";
++            }
+         }
+     }
+     return daemon;
+-- 
+2.27.0
+

pkgs/development/libraries/kde-frameworks/kdesu.nix

@@ -11,4 +11,5 @@ mkDerivation {
   buildInputs = [ kcoreaddons ki18n kpty kservice qtbase ];
   propagatedBuildInputs = [ kpty ];
   outputs = [ "out" "dev" ];
+  patches = [ ./kdesu-search-for-wrapped-daemon-first.patch ];
 }