[gobject-introspection/wip/tingping/meson] Build docs

[Patrick Griffis <pgriffis src gnome org>]

commit 01f26d46f2fdda7efc00b424258de8fe63939940
Author: Patrick Griffis <tingping tingping se>
Date:   Thu Oct 26 10:00:30 2017 -0400

    Build docs

 docs/meson.build           |    4 ++++
 docs/reference/meson.build |   41 +++++++++++++++++++++++++++++++++++++++++
 meson_options.txt          |    4 ++++
 3 files changed, 49 insertions(+), 0 deletions(-)
---
diff --git a/docs/meson.build b/docs/meson.build
index 1ffde1f..cebaad8 100644
--- a/docs/meson.build
+++ b/docs/meson.build
@@ -1,2 +1,6 @@
 install_man('g-ir-compiler.1', 'g-ir-generate.1', 'g-ir-scanner.1')
 install_data('gir-1.2.rnc', install_dir: join_paths(get_option('datadir'), 'gir-1.0'))
+
+if get_option('gtk-doc')
+  subdir('reference')
+endif
diff --git a/docs/reference/meson.build b/docs/reference/meson.build
new file mode 100644
index 0000000..b617311
--- /dev/null
+++ b/docs/reference/meson.build
@@ -0,0 +1,41 @@
+gnome = import('gnome')
+
+version_conf = configuration_data()
+version_conf.set('GI_VERSION', meson.project_version())
+
+version_xml = configure_file(
+  input: 'version.xml.in',
+  output: 'version.xml',
+  configuration: version_conf,
+)
+
+ignore_headers = [
+  'cmph',
+  'girnode.h',
+  'girparser.h',
+  'girwriter.h',
+  'girmodule.h',
+  'girepository-private.h',
+]
+
+gnome.gtkdoc('gi',
+  main_xml: 'gi-docs.xml',
+  dependencies: girepo_dep,
+  src_dir: 'girepository',
+  html_assets: 'images/overview.png',
+  content_files: [
+    'overview-building.xml',
+    'overview-programming.xml',
+    'gi-gir-reference.xml',
+    'gi-struct-hierarchy.xml',
+  ],
+  scan_args: [
+    '--rebuild-types',
+    '--ignore-headers=' + ' '.join(ignore_headers),
+  ],
+  mkdb_args: [
+    '--name-space=g',
+    '--ignore-files=cmph',
+  ],
+  install: true,
+)
diff --git a/meson_options.txt b/meson_options.txt
index 3d113cb..29224b7 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -10,6 +10,10 @@ option('glib-src-dir', type: 'string',
   description: 'Source directory for glib - needed to add docs to gir'
 )
 
+option('gtk-doc', type: 'boolean', value: false,
+  description: 'Build and install documentation'
+)
+
 option('gir_build', type: 'boolean',
   description: 'Windows: post build (gir) stuff'
 )