doc: Split API reference per platform

We can only include win32 APIs when building for Windows because gtkdoc
needs to compile the GObject classes for introspection.

docs/reference/gio/concat-files-helper.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+# Copyright (C) 2018 Collabora Inc.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General
+# Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
+#
+# Author: Xavier Claessens <xavier.claessens@collabora.com>
+
+import sys
+
+if len(sys.argv) < 3:
+  print('Usage: {} <output file> <input file 1> ...'.format(os.path.basename(sys.argv[0])))
+  sys.exit(1)
+
+with open(sys.argv[1], 'w') as outfile:
+    for fname in sys.argv[2:]:
+        with open(fname) as infile:
+            for line in infile:
+                outfile.write(line)