sdbus++: events: add meson support for registry generation

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ia8b95c291256726fdb729bcf886fa7f664ead4a5
diff --git a/example/gen/net/poettering/meson.build b/example/gen/net/poettering/meson.build
index 6f65217..62b350e 100644
--- a/example/gen/net/poettering/meson.build
+++ b/example/gen/net/poettering/meson.build
@@ -14,3 +14,17 @@
     ],
 )
 
+generated_others += custom_target(
+    'net/poettering/Calculator__registry'.underscorify(),
+    input: [ '../../../yaml/net/poettering/Calculator.events.yaml',  ],
+    output: [ 'Calculator.json' ],
+    depend_files: sdbusplusplus_depfiles,
+    command: [
+        sdbuspp_gen_meson_prog, '--command', 'registry',
+        '--output', meson.current_build_dir(),
+        '--tool', sdbusplusplus_prog,
+        '--directory', meson.current_source_dir() / '../../../yaml',
+        'net/poettering/Calculator',
+    ],
+)
+