[grilo-plugins/sam/grilo-subproject] build: Allow building grilo as a Meson subproject

[Sam Thursfield <sthursfield src gnome org>]

commit 15915cc8fb39c3db3839b088a2b0c16d7e977984
Author: Sam Thursfield <sam afuera me uk>
Date:   Sun Sep 29 16:56:26 2019 +0200

    build: Allow building grilo as a Meson subproject
    
    If a new enough version of Grilo isn't installed when trying to build
    grilo-plugins, Meson will now automatically clone the repo from Gitlab
    and build that.
    
    This can be disabled with the `--wrap-mode=nodownload` configure time
    option.
    
    Depends on: https://gitlab.gnome.org/GNOME/grilo/merge_requests/50

 meson.build            | 3 ++-
 subprojects/grilo.wrap | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index f0fd5142..b965658d 100644
--- a/meson.build
+++ b/meson.build
@@ -34,7 +34,8 @@ grilo_required_info = '>= @0@'.format(grilo_required)
 glib_dep = dependency('glib-2.0', version: glib2_required_info, required: true)
 gmodule_dep = dependency('gmodule-2.0', version: glib2_required_info, required: true)
 gobject_dep = dependency('gobject-2.0', version: glib2_required_info, required: true)
-grilo_dep = dependency('grilo-0.3', version: grilo_required_info, required: true)
+grilo_dep = dependency('grilo-0.3', version: grilo_required_info, required: true,
+                       fallback: ['grilo', 'libgrl_dep'])
 
 pkgconf = configuration_data()
 pkgconf.set('VERSION', plugin_version)
diff --git a/subprojects/grilo.wrap b/subprojects/grilo.wrap
new file mode 100644
index 00000000..4dafc57c
--- /dev/null
+++ b/subprojects/grilo.wrap
@@ -0,0 +1,4 @@
+[wrap-git]
+directory = grilo
+url = https://gitlab.gnome.org/gnome/grilo
+revision = head