From 54f24fe4b0770cce07ed9181aecb8150dc4680dc Mon Sep 17 00:00:00 2001
From: Michael Tretter <m.tretter@pengutronix.de>
Date: Wed, 24 Jan 2024 11:41:53 +0100
Subject: [PATCH] meson: allow building plugins with GTK 4 examples

Only the examples of the fallbackswitch, livesync, and togglerecord
plugins require the gtk, gio, and gst-plugin-gtk4 features. The plugins
themselves don't actually have a dependency on GTK.

Only add the features (and examples) if the examples are actually
enabled to allow building these plugins without the GTK dependency.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1438>
---
 meson.build | 41 ++++++++++++++++++++++++++---------------
 1 file changed, 26 insertions(+), 15 deletions(-)

diff --git a/meson.build b/meson.build
index 163f655f..b60ee8a4 100644
--- a/meson.build
+++ b/meson.build
@@ -201,6 +201,32 @@ plugins = {
   },
 }
 
+if get_option('examples').allowed()
+  plugins += {
+    'fallbackswitch': {
+      'library': 'libgstfallbackswitch',
+      'examples': ['gtk-fallbackswitch'],
+      'features': ['gtk', 'gio', 'gst-plugin-gtk4'],
+    },
+    'livesync': {
+      'library': 'libgstlivesync',
+      'examples': ['gtk-livesync'],
+      'features': ['gtk', 'gio', 'gst-plugin-gtk4'],
+    },
+    'togglerecord': {
+      'library': 'libgsttogglerecord',
+      'examples': ['gtk-recording'],
+      'features': ['gtk', 'gio', 'gst-plugin-gtk4'],
+    },
+  }
+else
+  plugins += {
+    'fallbackswitch': { 'library': 'libgstfallbackswitch'},
+    'livesync': { 'library': 'libgstlivesync'},
+    'togglerecord': { 'library': 'libgsttogglerecord'},
+  }
+endif
+
 # Won't build on platforms where it bundles the sources because of:
 # https://github.com/qnighy/libwebp-sys2-rs/issues/12
 # the fix is:
@@ -279,21 +305,6 @@ if get_option('gtk4').allowed()
       'extra-deps': {'gtk4': '>=4.6'},
       'features': gtk4_features,
     },
-    'fallbackswitch': {
-      'library': 'libgstfallbackswitch',
-      'examples': ['gtk-fallbackswitch'],
-      'features': ['gtk', 'gio', 'gst-plugin-gtk4'],
-    },
-    'livesync': {
-      'library': 'libgstlivesync',
-      'examples': ['gtk-livesync'],
-      'features': ['gtk', 'gio', 'gst-plugin-gtk4'],
-    },
-    'togglerecord': {
-      'library': 'libgsttogglerecord',
-      'examples': ['gtk-recording'],
-      'features': ['gtk', 'gio', 'gst-plugin-gtk4'],
-    },
   }
 endif