[gnome-software] packagekit common: Use plugin cache

[Kalev Lember <klember src gnome org>]

commit d134bf5710c84fbd6bd31b492d8c467b2c3b79bc
Author: Kalev Lember <klember redhat com>
Date:   Tue Mar 27 11:03:04 2018 +0200

    packagekit common: Use plugin cache
    
    This avoids getting duplicate results for various package search
    functions that don't set up unique id (we normally use unique id for
    duplicate filtering).

 plugins/packagekit/packagekit-common.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/plugins/packagekit/packagekit-common.c b/plugins/packagekit/packagekit-common.c
index f20497af..bc9f9366 100644
--- a/plugins/packagekit/packagekit-common.c
+++ b/plugins/packagekit/packagekit-common.c
@@ -253,9 +253,13 @@ gs_plugin_packagekit_add_results (GsPlugin *plugin,
                g_autoptr(GsApp) app = NULL;
                package = g_ptr_array_index (array_filtered, i);
 
-               app = gs_app_new (NULL);
-               gs_app_add_source (app, pk_package_get_name (package));
-               gs_app_add_source_id (app, pk_package_get_id (package));
+               app = gs_plugin_cache_lookup (plugin, pk_package_get_id (package));
+               if (app == NULL) {
+                       app = gs_app_new (NULL);
+                       gs_app_add_source (app, pk_package_get_name (package));
+                       gs_app_add_source_id (app, pk_package_get_id (package));
+                       gs_plugin_cache_add (plugin, pk_package_get_id (package), app);
+               }
                gs_app_set_name (app,
                                 GS_APP_QUALITY_LOWEST,
                                 pk_package_get_name (package));