Backport fix for waitpid errors

And suggests mutter since this is the default compositor.

Resolves: https://issues.redhat.com/browse/RHEL-46355

0001-wlheadless-Ignore-os.waitpid-1-0-error.patch

@@ -0,0 +1,49 @@
+From 2f43fc2d1b57c7945576bf2950b236416c0403dd Mon Sep 17 00:00:00 2001
+From: Niels De Graef <ndegraef@redhat.com>
+Date: Thu, 4 Jul 2024 17:09:41 +0200
+Subject: [PATCH] wlheadless: Ignore os.waitpid(-1, 0) error
+
+There's a chance that all child processes have already stopped running
+by the time we're cleaning up. If we then try to wait on child processes
+to finish (using `os.waitpid(-1, 0)`, the function will throw a
+`ChildProcessError`, which makes the whole script fail, with the
+following error message:
+
+```
+Traceback (most recent call last):
+  File "/usr/bin/wlheadless-run", line 90, in <module>
+    wlheadless_common.cleanup()
+    ~~~~~~~~~~~~~~~~~~~~~~~~~^^
+  File "/usr/lib/python3.13/site-packages/wlheadless/wlheadless_common.py", line 151, in cleanup
+    self.__cleanup_tempdir()
+    ~~~~~~~~~~~~~~~~~~~~~~^^
+  File "/usr/lib/python3.13/site-packages/wlheadless/wlheadless_common.py", line 136, in __cleanup_tempdir
+    os.waitpid(-1, 0)
+    ~~~~~~~~~~^^^^^^^
+ChildProcessError: [Errno 10] No child processes
+```
+
+Just ignore the error if it happens.
+---
+ src/wlheadless/wlheadless_common.py | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/src/wlheadless/wlheadless_common.py b/src/wlheadless/wlheadless_common.py
+index 556c0f7..d056f3b 100644
+--- a/src/wlheadless/wlheadless_common.py
++++ b/src/wlheadless/wlheadless_common.py
+@@ -133,7 +133,10 @@ class WlheadlessCommon:
+     def __cleanup_tempdir(self):
+         """ Removes our temporary XDG_RUNTIME_DIR directory if empty. """
+         if self.xdg_runtime_dir:
+-            os.waitpid(-1, 0)
++            try:
++                os.waitpid(-1, 0)
++            except ChildProcessError:
++                pass
+             try:
+                 rmtree(self.xdg_runtime_dir)
+             except OSError as error:
+-- 
+2.45.2
+

xwayland-run.spec

@@ -1,12 +1,15 @@
 Name:           xwayland-run
 Version:        0.0.4
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Set of utilities to run headless X/Wayland clients
 
 License:        GPL-2.0-or-later
 URL:            https://gitlab.freedesktop.org/ofourdan/xwayland-run
 Source0:        %{url}/-/archive/%{version}/%{name}-%{version}.tar.bz2
 
+# https://gitlab.freedesktop.org/ofourdan/xwayland-run/-/merge_requests/19
+Patch1: 0001-wlheadless-Ignore-os.waitpid-1-0-error.patch
+
 BuildArch:      noarch
 
 BuildRequires:  meson >= 0.60.0
@@ -16,6 +19,7 @@ Requires:       (weston or cage or kwin-wayland or mutter or gnome-kiosk)
 Requires:       xorg-x11-server-Xwayland
 Requires:       xorg-x11-xauth
 Requires:       dbus-daemon
+Suggests:       mutter
 
 # Provide names of the other utilities included
 Provides:       wlheadless-run = %{version}-%{release}
@@ -53,6 +57,10 @@ Xwayland and various Wayland compositor headless.
 
 
 %changelog
+* Tue Jul 09 2024 Olivier Fourdan <ofourdan@redhat.com> - 0.0.4-2
+- Backport fix for waitpid errors (RHEL-46355)
+- Suggest mutter since this is the default compositor
+
 * Mon Jul  1 2024 Olivier Fourdan <ofourdan@redhat.com> - 0.0.4-1
 - Update to 0.0.4
 - Require xorg-x11-xauth and dbus-daemon