[glib: 1/2] docs: Fix configuration with gtk_doc=true and installed_tests=false

[Sebastian Dröge <sdroege src gnome org>]

commit 84ad802c3a8c4f6aec37d4eb2d44b5dbbbbc0097
Author: Chris Mayo <aklhfex gmail com>
Date:   Fri Mar 27 19:33:12 2020 +0000

    docs: Fix configuration with gtk_doc=true and installed_tests=false
    
    Skip the gdbus-object-manager-example which is generated as part of
    testing.
    
    Program xsltproc found: YES (/usr/bin/xsltproc)
    Run-time dependency gtk-doc found: YES 1.32
    
    docs/reference/gio/gdbus-object-manager-example/meson.build:1:0: ERROR:
    Unknown variable "libgdbus_example_objectmanager_dep".

 docs/reference/gio/meson.build | 47 +++++++++++++++++++++++++-----------------
 1 file changed, 28 insertions(+), 19 deletions(-)
---
diff --git a/docs/reference/gio/meson.build b/docs/reference/gio/meson.build
index b25d11b41..a4e67ca82 100644
--- a/docs/reference/gio/meson.build
+++ b/docs/reference/gio/meson.build
@@ -1,5 +1,7 @@
 if get_option('gtk_doc')
-  subdir('gdbus-object-manager-example')
+  if installed_tests_enabled
+    subdir('gdbus-object-manager-example')
+  endif
   subdir('xml')
 
   ignore_headers = [
@@ -160,6 +162,30 @@ if get_option('gtk_doc')
     copy : true,
   )
 
+  content_files = [
+    'overview.xml',
+    'migrating-posix.xml',
+    'migrating-gnome-vfs.xml',
+    'migrating-gconf.xml',
+    'migrating-gdbus.xml',
+    'gio-querymodules.xml',
+    'glib-compile-schemas.xml',
+    'glib-compile-resources.xml',
+    'gapplication.xml',
+    'gsettings.xml',
+    'gresource.xml',
+    'gdbus.xml',
+    'gdbus-codegen.xml',
+  ]
+
+  if installed_tests_enabled
+    content_files += [
+      gdbus_example_objectmanager_xml,
+      gdbus_example_objectmanager_sources,
+      gdbus_object_manager_example_doc
+    ]
+  endif
+
   gnome.gtkdoc('gio',
     main_xml : 'gio-docs.xml',
     namespace : 'g',
@@ -173,24 +199,7 @@ if get_option('gtk_doc')
     mkdb_args : [
       '--ignore-files=' + ' '.join(ignore_sources),
     ],
-    content_files : [
-      'overview.xml',
-      'migrating-posix.xml',
-      'migrating-gnome-vfs.xml',
-      'migrating-gconf.xml',
-      'migrating-gdbus.xml',
-      'gio-querymodules.xml',
-      'glib-compile-schemas.xml',
-      'glib-compile-resources.xml',
-      'gapplication.xml',
-      'gsettings.xml',
-      'gresource.xml',
-      'gdbus.xml',
-      'gdbus-codegen.xml',
-      gdbus_example_objectmanager_xml,
-      gdbus_example_objectmanager_sources,
-      gdbus_object_manager_example_doc,
-    ],
+    content_files : content_files,
     expand_content_files : [
       'overview.xml',
       'migrating-posix.xml',