[gnome-software] Return the error details in the GError if the offline update failed

[Richard Hughes <rhughes src gnome org>]

commit da9ca5353c0263de7c66dc9e807c176c4a249644
Author: Richard Hughes <richard hughsie com>
Date:   Tue Nov 19 15:32:04 2013 +0000

    Return the error details in the GError if the offline update failed

 src/plugins/gs-plugin-packagekit-offline.c |   24 ++++++++++++++++++------
 1 files changed, 18 insertions(+), 6 deletions(-)
---
diff --git a/src/plugins/gs-plugin-packagekit-offline.c b/src/plugins/gs-plugin-packagekit-offline.c
index ca54f47..bc3a2a4 100644
--- a/src/plugins/gs-plugin-packagekit-offline.c
+++ b/src/plugins/gs-plugin-packagekit-offline.c
@@ -54,8 +54,8 @@ gs_plugin_add_updates_historical (GsPlugin *plugin,
                                  GError **error)
 {
        gboolean ret = TRUE;
-       gboolean success;
        gchar **package_ids = NULL;
+       gchar *error_details = NULL;
        gchar *packages = NULL;
        gchar **split;
        GKeyFile *key_file = NULL;
@@ -76,12 +76,23 @@ gs_plugin_add_updates_historical (GsPlugin *plugin,
                goto out;
 
        /* only return results if successful */
-       success = g_key_file_get_boolean (key_file,
-                                         PK_OFFLINE_UPDATE_RESULTS_GROUP,
-                                         "Success",
-                                         NULL);
-       if (!success)
+       ret = g_key_file_get_boolean (key_file,
+                                     PK_OFFLINE_UPDATE_RESULTS_GROUP,
+                                     "Success",
+                                     NULL);
+       if (!ret) {
+               error_details = g_key_file_get_string (key_file,
+                                                      PK_OFFLINE_UPDATE_RESULTS_GROUP,
+                                                      "ErrorDetails",
+                                                      error);
+               if (error_details == NULL)
+                       goto out;
+               g_set_error_literal (error,
+                                    GS_PLUGIN_ERROR,
+                                    GS_PLUGIN_ERROR_FAILED,
+                                    error_details);
                goto out;
+       }
 
        /* get list of package-ids */
        packages = g_key_file_get_string (key_file,
@@ -111,6 +122,7 @@ gs_plugin_add_updates_historical (GsPlugin *plugin,
                g_strfreev (split);
        }
 out:
+       g_free (error_details);
        g_free (packages);
        g_strfreev (package_ids);
        if (key_file != NULL)