AppImage: don't use bundled Wayland libraries

Don't use bundled Wayland libraries when running on Wayland but use it
otherwise to satisfy possibly unsatisfied dependencies.

See also previous commit - Wayland libraries seem not to be portable and
prevent SDL2 native run on Wayland. After this change, SDL2 runs on
U22.04 in Weston (without Xwayland).

data/scripts/Linux-AppImage/AppRun

@@ -161,6 +161,13 @@ setup_vaapi() {
         fi
 }
 
+setup_wayland() {
+        # use bundled Wayland libs only when not running on Wayland, otherwise system ones
+        if [ -z "${WAYLAND_DISPLAY-}" ]; then
+                LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$AI_LIB_PATH/wayland"
+        fi
+}
+
 add_whitelist() {
         if expr "$1" : /tmp >/dev/null; then
                 printf -- "$separator--read-write=%s --mkdir=%s" "$1" "$1"
@@ -202,6 +209,7 @@ get_firejail_whitelist() {
 }
 
 setup_vaapi
+setup_wayland
 # shellcheck source=/dev/null
 . "$DIR/scripts/jack_preload.sh"
 

data/scripts/Linux-AppImage/create-appimage.sh

@@ -70,6 +70,12 @@ for n in "$APPPREFIX"/bin/* "$APPPREFIX"/lib/ultragrid/* $PLUGIN_LIBS; do
         done
 done
 
+# hide Wayland libraries
+if ls $APPPREFIX/lib/libwayland-* >/dev/null 2>&1; then
+        mkdir $APPPREFIX/lib/wayland
+        mv $APPPREFIX/lib/libwayland-* $APPPREFIX/lib/wayland
+fi
+
 if command wget >/dev/null && wget -V | grep -q https; then
         dl() {
                 wget -O - ${GITHUB_TOKEN+--header "Authorization: token $GITHUB_TOKEN"} "$1"