Add mkdb_args support to gnome.gtkdoc()

There are cases where we need to specify arguments to gtkdoc-mkdb, like
telling it to scan extensions that are not '.h' and '.c'. Let's add a
new named argument to gnome.gtkdoc(), as well as the plumbing needed for
the gtk-doc helper script.

mesonbuild/modules/gnome.py

@@ -697,6 +697,7 @@ class GnomeModule(ExtensionModule):
         args += self._unpack_args('--scanobjsargs=', 'scanobjs_args', kwargs)
         args += self._unpack_args('--gobjects-types-file=', 'gobject_typesfile', kwargs, state)
         args += self._unpack_args('--fixxrefargs=', 'fixxref_args', kwargs)
+        args += self._unpack_args('--mkdbargs=', 'mkdb_args', kwargs)
         args += self._unpack_args('--html-assets=', 'html_assets', kwargs, state)
         args += self._unpack_args('--content-files=', 'content_files', kwargs, state)
         args += self._unpack_args('--expand-content-files=', 'expand_content_files', kwargs, state)

mesonbuild/scripts/gtkdochelper.py

@@ -32,6 +32,7 @@ parser.add_argument('--scanargs', dest='scanargs', default='')
 parser.add_argument('--scanobjsargs', dest='scanobjsargs', default='')
 parser.add_argument('--gobjects-types-file', dest='gobject_typesfile', default='')
 parser.add_argument('--fixxrefargs', dest='fixxrefargs', default='')
+parser.add_argument('--mkdbargs', dest='mkdbargs', default='')
 parser.add_argument('--ld', dest='ld', default='')
 parser.add_argument('--cc', dest='cc', default='')
 parser.add_argument('--ldflags', dest='ldflags', default='')
@@ -55,7 +56,8 @@ def gtkdoc_run_check(cmd, cwd):
         raise MesonException('\n'.join(err_msg))
 
 def build_gtkdoc(source_root, build_root, doc_subdir, src_subdirs,
-                 main_file, module, html_args, scan_args, fixxref_args,
+                 main_file, module,
+                 html_args, scan_args, fixxref_args, mkdb_args,
                  gobject_typesfile, scanobjs_args, ld, cc, ldflags, cflags,
                  html_assets, content_files, ignore_headers, namespace,
                  expand_content_files, mode):
@@ -141,6 +143,8 @@ def build_gtkdoc(source_root, build_root, doc_subdir, src_subdirs,
     if len(main_file) > 0:
         # Yes, this is the flag even if the file is in xml.
         mkdb_cmd.append('--main-sgml-file=' + main_file)
+    # Add user-specified arguments
+    mkdb_cmd += mkdb_args
     gtkdoc_run_check(mkdb_cmd, abs_out)
 
     # Make HTML documentation
@@ -185,6 +189,10 @@ def run(args):
         fixxrefargs = options.fixxrefargs.split('@@')
     else:
         fixxrefargs = []
+    if len(options.mkdbargs) > 0:
+        mkdbargs = options.mkdbargs.split('@@')
+    else:
+        mkdbargs = []
     build_gtkdoc(
         options.sourcedir,
         options.builddir,
@@ -195,6 +203,7 @@ def run(args):
         htmlargs,
         scanargs,
         fixxrefargs,
+        mkdbargs,
         options.gobject_typesfile,
         scanobjsargs,
         options.ld,