[nautilus] meson: make doc generation opt-in

[Ernestas Kulik <ernestask src gnome org>]

commit 2c22594624f04d781e192b35412e2d20e9a04aba
Author: Ernestas Kulik <ernestask src gnome org>
Date:   Wed Mar 1 18:08:50 2017 +0200

    meson: make doc generation opt-in
    
    Since Continuous does not have GTK-Doc and jhbuild users don’t usually
    care about generating documentation, it makes sense to disable it by
    default.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=779420

 meson.build       |    5 ++++-
 meson_options.txt |    3 +++
 2 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/meson.build b/meson.build
index 25910c7..d8ae100 100644
--- a/meson.build
+++ b/meson.build
@@ -116,7 +116,10 @@ subdir ('src')
 subdir ('test')
 subdir ('data')
 subdir ('po')
-subdir ('docs')
+
+if get_option ('enable-gtk-doc')
+    subdir ('docs')
+endif
 
 if get_option ('enable-desktop')
     subdir ('nautilus-desktop')
diff --git a/meson_options.txt b/meson_options.txt
index 9025527..ac4b74a 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -24,3 +24,6 @@ option ('enable-packagekit',
 option ('enable-tracker',
         type: 'boolean',
         value: true)
+option ('enable-gtk-doc',
+        type: 'boolean',
+        value: false)