build: Make g-ir-scanner warnings fatal when -werror is set

This should help catching problems with introspection in CI.

This also pulls out some common arguments to the gnome.generate_gir
call.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3528>

clutter/clutter/meson.build

@@ -323,9 +323,7 @@ if have_introspection
     ],
     dependencies: [cogl_deps],
     extra_args: clutter_introspection_args + ['--c-include=clutter/clutter.h'],
-    install_dir_gir: pkglibdir,
-    install_dir_typelib: pkglibdir,
-    install: true,
+    kwargs: introspection_common,
   )
 
   libmutter_cally_gir = gnome.generate_gir(libmutter_clutter,
@@ -344,9 +342,7 @@ if have_introspection
     ],
     dependencies: [cogl_deps],
     extra_args: clutter_introspection_args,
-    install_dir_gir: pkglibdir,
-    install_dir_typelib: pkglibdir,
-    install: true
+    kwargs: introspection_common,
   )
 endif
 

cogl/cogl-pango/meson.build

@@ -60,9 +60,7 @@ if have_introspection
       '-UCOGL_COMPILATION',
       '-DG_LOG_DOMAIN="CoglPango"',
     ],
-    install_dir_gir: pkglibdir,
-    install_dir_typelib: pkglibdir,
-    install: true
+    kwargs: introspection_common,
   )
 endif
 

cogl/cogl/meson.build

@@ -426,9 +426,7 @@ if have_introspection
       '-DCOGL_GIR_SCANNING',
     ],
     header: 'cogl/cogl.h',
-    install_dir_gir: pkglibdir,
-    install_dir_typelib: pkglibdir,
-    install: true
+    kwargs: introspection_common,
   )
 endif
 

meson.build

@@ -324,6 +324,13 @@ if have_introspection
     '--quiet',
     '-U_GNU_SOURCE',
   ]
+
+  introspection_common = {
+    'install_dir_gir': pkglibdir,
+    'install_dir_typelib': pkglibdir,
+    'install': true,
+    'fatal_warnings': get_option('werror'),
+  }
 endif
 
 have_documentation = get_option('docs')

mtk/mtk/meson.build

@@ -67,9 +67,7 @@ if have_introspection
       'Graphene-1.0',
     ],
     extra_args: mtk_introspection_args + ['--c-include=mtk/mtk.h'],
-    install_dir_gir: pkglibdir,
-    install_dir_typelib: pkglibdir,
-    install: true,
+    kwargs: introspection_common,
   )
 
 endif

src/meson.build

@@ -1274,9 +1274,7 @@ if have_introspection
     ],
     export_packages: 'libmutter-@0@'.format(libmutter_api_version),
     extra_args: mutter_c_args + introspection_args,
-    install_dir_gir: pkglibdir,
-    install_dir_typelib: pkglibdir,
-    install: true
+    kwargs: introspection_common,
   )
 endif
 

src/tests/meson.build

@@ -98,9 +98,7 @@ if have_introspection
       mutter_deps,
     ],
     extra_args: mutter_c_args + introspection_args,
-    install_dir_gir: pkglibdir,
-    install_dir_typelib: pkglibdir,
-    install: true
+    kwargs: introspection_common,
   )
 endif