weston-init: Add module support for the weston-start helper

To make weston-start more flexible we now support module loading. For
such modules, following functions can be used:

 - add_weston_argument
 - add_openvt_argument

(From OE-Core rev: 3e7c4d06aaa1fccc1a18f4431122603cc4a9bbe9)

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-graphics/wayland/weston-init.bb

@@ -11,7 +11,10 @@ S = "${WORKDIR}"
 do_install() {
 	install -Dm755 ${WORKDIR}/init ${D}/${sysconfdir}/init.d/weston
 	install -Dm0644 ${WORKDIR}/weston.service ${D}${systemd_system_unitdir}/weston.service
+
+	# Install weston-start script
 	install -Dm755 ${WORKDIR}/weston-start ${D}${bindir}/weston-start
+	sed -i 's,@DATADIR@,${datadir},g' ${D}${bindir}/weston-start
 }
 
 inherit allarch update-rc.d distro_features_check systemd

meta/recipes-graphics/wayland/weston-init/weston-start

@@ -9,6 +9,19 @@ usage() {
 EOF
 }
 
+## Module support
+modules_dir=@DATADIR@/weston-start
+
+# Add weston extra argument
+add_weston_argument() {
+	weston_args="$weston_args $1"
+}
+
+# Add openvt extra argument
+add_openvt_argument() {
+	openvt_args="$openvt_args $1"
+}
+
 if test $# -lt 2; then
 	usage
 	exit 1
@@ -32,6 +45,19 @@ done
 
 weston_args=$*
 
+# Load and run modules
+if [ -d "$modules_dir" ]; then
+	for m in "$modules_dir"/*; do
+		# Skip backup files
+		if [ "`echo $m | sed -e 's/\~$//'`" != "$m" ]; then
+			continue
+		fi
+
+		# process module
+		. $m
+	done
+fi
+
 if test -z "$XDG_RUNTIME_DIR"; then
     export XDG_RUNTIME_DIR=/run/user/`id -u`
     mkdir --parents $XDG_RUNTIME_DIR