gnome: allow generator outputs as gdbus-codegen inputs

GeneratedLists as sources to `gnome.gdbus_codegen` worked until
version 0.60 of Meson, but broke in 0.61 because of the conversion to
typed_pos_args and typed_kwargs.  Reinstate this by adding them to the
decorators and annotations.

Note that gdbus_codegen desugars to two custom_targets and therefore the
generator is invoked twice.  This is not optimal, but it should not be
an issue and can be changed later.

Fixes: 53a187ba2 ("modules/gnome: use typed_pos_args for gdbus_codegen", 2021-11-01)
Fixes: ef52e6093 ("modules/gnome: use typed_kwargs for gdbus_codegen", 2021-11-08)

3 files changed, 14 insertions, 3 deletions

diff --git a/mesonbuild/modules/gnome.py b/mesonbuild/modules/gnome.py
index e503ee9..f0ef03c 100644
--- a/mesonbuild/modules/gnome.py
+++ b/mesonbuild/modules/gnome.py
@@ -32,7 +32,7 @@ from .. import mesonlib
 from .. import mlog
 from ..build import CustomTarget, CustomTargetIndex, Executable, GeneratedList, InvalidArguments
 from ..dependencies import Dependency, PkgConfigDependency, InternalDependency
-from ..interpreter.type_checking import DEPENDS_KW, DEPEND_FILES_KW, INSTALL_DIR_KW, INSTALL_KW, NoneType, in_set_validator
+from ..interpreter.type_checking import DEPENDS_KW, DEPEND_FILES_KW, INSTALL_DIR_KW, INSTALL_KW, NoneType, SOURCES_KW, in_set_validator
 from ..interpreterbase import noPosargs, noKwargs, FeatureNew, FeatureDeprecated
 from ..interpreterbase import typed_kwargs, KwargInfo, ContainerTypeInfo
 from ..interpreterbase.decorators import typed_pos_args
@@ -1570,11 +1570,11 @@ class GnomeModule(ExtensionModule):
     def gtkdoc_html_dir(self, state: 'ModuleState', args: T.Tuple[str], kwargs: 'TYPE_kwargs') -> str:
         return os.path.join('share/gtk-doc/html', args[0])
 
-    @typed_pos_args('gnome.gdbus_codegen', str, optargs=[(str, mesonlib.File, build.CustomTarget, build.CustomTargetIndex)])
+    @typed_pos_args('gnome.gdbus_codegen', str, optargs=[(str, mesonlib.File, build.CustomTarget, build.CustomTargetIndex, build.GeneratedList)])
     @typed_kwargs(
         'gnome.gdbus_codegen',
         _BUILD_BY_DEFAULT.evolve(since='0.40.0'),
-        KwargInfo('sources', ContainerTypeInfo(list, (str, mesonlib.File, build.CustomTarget, build.CustomTargetIndex)), since='0.46.0', default=[], listify=True),
+        SOURCES_KW.evolve(since='0.46.0'),
         KwargInfo('extra_args', ContainerTypeInfo(list, str), since='0.47.0', default=[], listify=True),
         KwargInfo('interface_prefix', (str, NoneType)),
         KwargInfo('namespace', (str, NoneType)),
diff --git a/test cases/frameworks/7 gnome/gdbus/meson.build b/test cases/frameworks/7 gnome/gdbus/meson.build
index d749033..fdb3896 100644
--- a/test cases/frameworks/7 gnome/gdbus/meson.build
+++ b/test cases/frameworks/7 gnome/gdbus/meson.build
@@ -79,6 +79,14 @@ gdbus_src_cti = gnome.gdbus_codegen(
   annotations : [],
 )
 
+gdbus_src_gen = gnome.gdbus_codegen(
+  'generated-gdbus-generator-src',
+  copyfile_gen.process('data/com.example.Sample.xml'),
+  interface_prefix : 'com.example.',
+  namespace : 'Sample',
+  annotations : [],
+)
+
 gdbus_exe = executable('gdbus-test', 'gdbusprog.c',
   gdbus_src,
   include_directories : includes,
diff --git a/test cases/frameworks/7 gnome/meson.build b/test cases/frameworks/7 gnome/meson.build
index 920bc6a..5f438cb 100644
--- a/test cases/frameworks/7 gnome/meson.build
+++ b/test cases/frameworks/7 gnome/meson.build
@@ -1,6 +1,9 @@
 project('gobject-introspection', 'c')
 
 copyfile = find_program('copyfile.py')
+copyfile_gen = generator(copyfile,
+  output: '@BASENAME@Gen.xml',
+  arguments : ['@INPUT@', '@OUTPUT@'])
 
 glib = dependency('glib-2.0', required: false)
 if not glib.found()