use generators for wayland protocol gen

examples/compositor/xdg_shell.c

@@ -3,7 +3,7 @@
 #include <wlr/util/log.h>
 #include <stdlib.h>
 #include "compositor.h"
-#include "compositor/protocols/xdg-shell.h"
+#include "xdg-shell-unstable-v6-protocol.h"
 
 static void resource_destructor(struct wl_client *client,
 		struct wl_resource *resource) {

examples/meson.build

@@ -8,32 +8,32 @@ executable('pointer', 'pointer.c', dependencies: dep_wlr, link_with: lib_shared)
 executable('touch', 'touch.c', dependencies: dep_wlr, link_with: lib_shared)
 executable('tablet', 'tablet.c', dependencies: dep_wlr, link_with: lib_shared)
 
+wayland_scanner = find_program('wayland-scanner')
+wl_protocol_dir = dep_wayland_proto.get_pkgconfig_variable('pkgdatadir')
+
+wayland_scanner_server = generator(wayland_scanner,
+		output: '@BASENAME@-protocol.h',
+		arguments: ['server-header', '@INPUT@', '@OUTPUT@'])
+
+wayland_scanner_code = generator(wayland_scanner,
+		output: '@BASENAME@-protocol.c',
+		arguments: ['code', '@INPUT@', '@OUTPUT@'])
+
 compositor_src = [
     'compositor/main.c',
     'compositor/wl_compositor.c',
     'compositor/wl_shell.c',
     'compositor/xdg_shell.c',
-	'compositor/protocols/xdg-shell.c',
 ]
 
-wayland_scanner = find_program('wayland-scanner')
-wayland_protocols_pkgdatadir = dep_wayland_proto.get_pkgconfig_variable('pkgdatadir')
-
-protocols_src = meson.current_source_dir() + '/compositor/protocols'
-run_command(['mkdir', '-p', protocols_src])
-
 protocols = [
-	['/unstable/xdg-shell/xdg-shell-unstable-v6.xml', 'xdg-shell']
+	[ 'unstable', 'xdg-shell', 'xdg-shell-unstable-v6.xml' ]
 ]
 
 foreach p : protocols
-	xml = wayland_protocols_pkgdatadir + p[0]
-
-	run_command([wayland_scanner, 'code', xml,
-		protocols_src + '/' + p[1] + '.c'])
-
-	run_command([wayland_scanner, 'server-header', xml,
-		protocols_src + '/' + p[1] + '.h'])
+	xml = join_paths([wl_protocol_dir] + p)
+	compositor_src += wayland_scanner_code.process(xml)
+	compositor_src += wayland_scanner_server.process(xml)
 endforeach
 
 executable('compositor', compositor_src, dependencies: dep_wlr, link_with: lib_shared)