[geocode-glib: 1/2] Fix meson docs building

[Bastien Nocera <hadess src gnome org>]

commit f8f12718116babcfb1fb7e6b4f604d69e22e1953
Author: Alberto Fanjul <albertofanjul gmail com>
Date:   Sun Jun 24 10:42:25 2018 +0200

    Fix meson docs building

 docs/geocode-glib-docs.xml | 1 +
 docs/meson.build           | 6 ++++++
 2 files changed, 7 insertions(+)
---
diff --git a/docs/geocode-glib-docs.xml b/docs/geocode-glib-docs.xml
index f110f90..f829ea8 100644
--- a/docs/geocode-glib-docs.xml
+++ b/docs/geocode-glib-docs.xml
@@ -3,6 +3,7 @@
                "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd";
 [
   <!ENTITY % local.common.attrib "xmlns:xi  CDATA  #FIXED 'http://www.w3.org/2003/XInclude'">
+  <!ENTITY version SYSTEM "version.xml">
 ]>
 <book id="index">
   <bookinfo>
diff --git a/docs/meson.build b/docs/meson.build
index 0f56871..8a03a32 100644
--- a/docs/meson.build
+++ b/docs/meson.build
@@ -17,6 +17,12 @@ private_headers = [
   'geocode-nominatim-test.h',
 ]
 
+version_xml_conf = configuration_data()
+version_xml_conf.set('VERSION', meson.project_version())
+configure_file(input: 'version.xml.in',
+               output: 'version.xml',
+               configuration: version_xml_conf)
+
 glib_prefix = dependency('glib-2.0').get_pkgconfig_variable('prefix')
 glib_docpath = join_paths(glib_prefix, 'share', 'gtk-doc', 'html')
 docpath = join_paths(datadir, 'gtk-doc', 'html')