[mutter/bilelmoussaoui/wayland-server-subproject: 2/2] build: Add a wayland subproject

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit d6886fe3944be49bf038da7b6bd5b379f70e42d2
Author: Bilal Elmoussaoui <belmouss redhat com>
Date:   Wed Jul 27 14:47:36 2022 +0200

    build: Add a wayland subproject
    
    It allows building mutter even if the installed wayland-server / client
    is older than the required one

 meson.build              | 9 +++++++--
 subprojects/wayland.wrap | 5 +++++
 2 files changed, 12 insertions(+), 2 deletions(-)
---
diff --git a/meson.build b/meson.build
index 60936dd68b..03dd1c376d 100644
--- a/meson.build
+++ b/meson.build
@@ -197,8 +197,13 @@ if have_gles2
 endif
 
 if have_wayland
-  wayland_server_dep = dependency('wayland-server', version: wayland_server_req)
-  wayland_client_dep = dependency('wayland-client', version: wayland_server_req)
+  wayland_build_options = ['dtd_validation=false', 'tests=false', 'documentation=false']
+  wayland_server_dep = dependency('wayland-server', version: wayland_server_req,
+                                fallback: ['wayland', 'wayland_server_dep'],
+                                default_options: wayland_build_options)
+  wayland_client_dep = dependency('wayland-client', version: wayland_server_req,
+                                fallback: ['wayland', 'wayland_client_dep'],
+                                default_options: wayland_build_options)
   wayland_protocols_dep = dependency('wayland-protocols',
                                      version: wayland_protocols_req)
   wayland_egl_dep = dependency('wayland-egl')
diff --git a/subprojects/wayland.wrap b/subprojects/wayland.wrap
new file mode 100644
index 0000000000..57ea88e585
--- /dev/null
+++ b/subprojects/wayland.wrap
@@ -0,0 +1,5 @@
+[wrap-git]
+directory=wayland
+url=https://gitlab.freedesktop.org/wayland/wayland.git
+revision=main
+depth=1