Do not write X-Kudo-RecentRelease for new versions of the metadata

Software centers can trivially work this out, e.g. something like:
https://git.gnome.org/browse/gnome-software/commit/?id=ad6c09c2eadb903151f3eb14a3962da160795dad

4 files changed, 30 insertions, 9 deletions

diff --git a/libappstream-builder/asb-context.c b/libappstream-builder/asb-context.c
index 75de2d3..c5d32b1 100644
--- a/libappstream-builder/asb-context.c
+++ b/libappstream-builder/asb-context.c
@@ -410,6 +410,23 @@ asb_context_get_add_cache_id (AsbContext *ctx)
 }
 
 /**
+ * asb_context_get_api_version:
+ * @ctx: A #AsbContext
+ *
+ * Gets the target metadata API version.
+ *
+ * Returns: floating point
+ *
+ * Since: 0.1.0
+ **/
+gdouble
+asb_context_get_api_version (AsbContext *ctx)
+{
+	AsbContextPrivate *priv = GET_PRIVATE (ctx);
+	return priv->api_version;
+}
+
+/**
  * asb_context_get_temp_dir:
  * @ctx: A #AsbContext
  *
diff --git a/libappstream-builder/asb-context.h b/libappstream-builder/asb-context.h
index 2da3115..0462d4d 100644
--- a/libappstream-builder/asb-context.h
+++ b/libappstream-builder/asb-context.h
@@ -92,6 +92,7 @@ const gchar	*asb_context_get_temp_dir	(AsbContext	*ctx);
 gboolean	 asb_context_get_add_cache_id	(AsbContext	*ctx);
 gboolean	 asb_context_get_extra_checks	(AsbContext	*ctx);
 gboolean	 asb_context_get_use_package_cache (AsbContext	*ctx);
+gdouble		 asb_context_get_api_version	(AsbContext	*ctx);
 
 gboolean	 asb_context_setup		(AsbContext	*ctx,
 						 GError		**error);
diff --git a/libappstream-builder/asb-plugin.h b/libappstream-builder/asb-plugin.h
index 7eaafc4..274aca7 100644
--- a/libappstream-builder/asb-plugin.h
+++ b/libappstream-builder/asb-plugin.h
@@ -44,6 +44,7 @@ struct AsbPlugin {
 	gboolean		 enabled;
 	gchar			*name;
 	AsbPluginPrivate	*priv;
+	AsbContext		*ctx;
 };
 
 typedef enum {
diff --git a/libappstream-builder/plugins/asb-plugin-hardcoded.c b/libappstream-builder/plugins/asb-plugin-hardcoded.c
index 5443875..ba42dce 100644
--- a/libappstream-builder/plugins/asb-plugin-hardcoded.c
+++ b/libappstream-builder/plugins/asb-plugin-hardcoded.c
@@ -261,15 +261,17 @@ asb_plugin_process_app (AsbPlugin *plugin,
 
 	/* has the application been updated in the last year */
 	releases = as_app_get_releases (AS_APP (app));
-	for (i = 0; i < releases->len; i++) {
-		release = g_ptr_array_index (releases, i);
-		secs = (g_get_real_time () / G_USEC_PER_SEC) -
-			as_release_get_timestamp (release);
-		days = secs / (60 * 60 * 24);
-		if (days < 365) {
-			as_app_add_metadata (AS_APP (app),
-					     "X-Kudo-RecentRelease", "", -1);
-			break;
+	if (asb_context_get_api_version (plugin->ctx) <= 0.8) {
+		for (i = 0; i < releases->len; i++) {
+			release = g_ptr_array_index (releases, i);
+			secs = (g_get_real_time () / G_USEC_PER_SEC) -
+				as_release_get_timestamp (release);
+			days = secs / (60 * 60 * 24);
+			if (days < 365) {
+				as_app_add_metadata (AS_APP (app),
+						     "X-Kudo-RecentRelease", "", -1);
+				break;
+			}
 		}
 	}