gnome: allow custom targets as gdbus-codegen inputs

Custom targets 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 custom targets to the
decorators and annotations.

While generators also used to work, they are a bit tricky because
gdbus_codegen desugars to two custom_targets and therefore the generator
is invoked twice.  This should not be a problem, but be explicit and
leave that to a separate commit to highlight the problem.

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)

4 files changed, 23 insertions, 2 deletions

diff --git a/test cases/frameworks/7 gnome/resources/copyfile.py b/test cases/frameworks/7 gnome/copyfile.py
index 7e44c48dd..7e44c48dd 100644
--- a/test cases/frameworks/7 gnome/resources/copyfile.py
+++ b/test cases/frameworks/7 gnome/copyfile.py
diff --git a/test cases/frameworks/7 gnome/gdbus/meson.build b/test cases/frameworks/7 gnome/gdbus/meson.build
index 682abfffe..d749033e9 100644
--- a/test cases/frameworks/7 gnome/gdbus/meson.build
+++ b/test cases/frameworks/7 gnome/gdbus/meson.build
@@ -58,6 +58,27 @@ else
   includes = include_directories('..')
 endif
 
+# check that custom targets work
+gdbus_xml_ct = custom_target('built xml sources for gdbus',
+  output: 'com.example.SampleCustomTarget.xml',
+  input: 'data/com.example.Sample.xml',
+  command : [copyfile, '@INPUT@', '@OUTPUT@'])
+
+gdbus_src_ct = gnome.gdbus_codegen(
+  'generated-gdbus-customtarget-src',
+  gdbus_xml_ct,
+  interface_prefix : 'com.example.',
+  namespace : 'Sample',
+  annotations : [],
+)
+gdbus_src_cti = gnome.gdbus_codegen(
+  'generated-gdbus-customtargetindex-src',
+  gdbus_xml_ct[0],
+  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 9f8640609..920bc6a82 100644
--- a/test cases/frameworks/7 gnome/meson.build
+++ b/test cases/frameworks/7 gnome/meson.build
@@ -1,5 +1,7 @@
 project('gobject-introspection', 'c')
 
+copyfile = find_program('copyfile.py')
+
 glib = dependency('glib-2.0', required: false)
 if not glib.found()
   error('MESON_SKIP_TEST glib not found.')
diff --git a/test cases/frameworks/7 gnome/resources/meson.build b/test cases/frameworks/7 gnome/resources/meson.build
index 180b33851..60fc8481e 100644
--- a/test cases/frameworks/7 gnome/resources/meson.build
+++ b/test cases/frameworks/7 gnome/resources/meson.build
@@ -1,8 +1,6 @@
 # There are two tests here, because the 2nd one depends on a version of
 # GLib (2.51.1) that is very recent at the time of writing.
 
-copyfile = find_program('copyfile.py')
-
 simple_gresource = configure_file(
   input : 'simple.gresource.xml',
   output : 'simple-gen.gresource.xml',