[gnome-software] Add --prefer-local to prefer the local data to the distro AppStream metadata

[Richard Hughes <rhughes src gnome org>]

commit b59375cd5bf75a3e5044647d4a74878f4315a800
Author: Richard Hughes <richard hughsie com>
Date:   Tue Jul 1 09:36:43 2014 +0100

    Add --prefer-local to prefer the local data to the distro AppStream metadata
    
    Users can also use GNOME_SOFTWARE_PREFER_LOCAL=1 in the environment settings.
    
    Resolves: https://bugzilla.gnome.org/show_bug.cgi?id=732466

 src/gs-application.c              |    7 +++++++
 src/gs-cmd.c                      |    7 +++++++
 src/plugins/gs-plugin-appstream.c |    4 ++++
 3 files changed, 18 insertions(+), 0 deletions(-)
---
diff --git a/src/gs-application.c b/src/gs-application.c
index 0f6903b..69d521b 100644
--- a/src/gs-application.c
+++ b/src/gs-application.c
@@ -514,6 +514,7 @@ gs_application_local_command_line (GApplication *app, gchar ***args, gint *statu
        gchar *local_filename = NULL;
        gchar *id = NULL;
        gboolean activate_ui = TRUE;
+       gboolean prefer_local = FALSE;
        gboolean version = FALSE;
        gboolean profile = FALSE;
        gboolean verbose = FALSE;
@@ -534,6 +535,8 @@ gs_application_local_command_line (GApplication *app, gchar ***args, gint *statu
                  _("Set the specified debugging level"), _("ID") },
                { "profile", 0, 0, G_OPTION_ARG_NONE, &profile,
                  _("Show profiling information for the service"), NULL },
+               { "prefer-local", '\0', 0, G_OPTION_ARG_NONE, &prefer_local,
+                 "Prefer local file sources to AppStream", NULL },
                { "version", 0, 0, G_OPTION_ARG_NONE, &version, NULL, NULL },
                { NULL}
        };
@@ -553,6 +556,10 @@ gs_application_local_command_line (GApplication *app, gchar ***args, gint *statu
        if (verbose)
                g_setenv ("G_MESSAGES_DEBUG", "all", TRUE);
 
+       /* prefer local sources */
+       if (prefer_local)
+               g_setenv ("GNOME_SOFTWARE_PREFER_LOCAL", "true", TRUE);
+
        if (version) {
                g_print ("gnome-software " VERSION "\n");
                *status = 0;
diff --git a/src/gs-cmd.c b/src/gs-cmd.c
index c56f340..e9288fd 100644
--- a/src/gs-cmd.c
+++ b/src/gs-cmd.c
@@ -186,6 +186,7 @@ main (int argc, char **argv)
        GsCategory *category = NULL;
        GsPluginLoader *plugin_loader = NULL;
        GsProfile *profile = NULL;
+       gboolean prefer_local = FALSE;
        gboolean ret;
        gboolean show_results = FALSE;
        guint64 refine_flags = GS_PLUGIN_REFINE_FLAGS_DEFAULT;
@@ -201,6 +202,8 @@ main (int argc, char **argv)
                  "Set any refine flags required for the action", NULL },
                { "repeat", '\0', 0, G_OPTION_ARG_INT, &repeat,
                  "Repeat the action this number of times", NULL },
+               { "prefer-local", '\0', 0, G_OPTION_ARG_NONE, &prefer_local,
+                 "Prefer local file sources to AppStream", NULL },
                { NULL}
        };
 
@@ -224,6 +227,10 @@ main (int argc, char **argv)
                goto out;
        }
 
+       /* prefer local sources */
+       if (prefer_local)
+               g_setenv ("GNOME_SOFTWARE_PREFER_LOCAL", "true", TRUE);
+
        /* parse any refine flags */
        refine_flags = gs_cmd_parse_refine_flags (refine_flags_str, &error);
        if (refine_flags == G_MAXUINT64) {
diff --git a/src/plugins/gs-plugin-appstream.c b/src/plugins/gs-plugin-appstream.c
index 050daea..ae66a65 100644
--- a/src/plugins/gs-plugin-appstream.c
+++ b/src/plugins/gs-plugin-appstream.c
@@ -136,6 +136,10 @@ gs_plugin_startup (GsPlugin *plugin, GCancellable *cancellable, GError **error)
 
        /* Parse the XML */
        gs_profile_start (plugin->profile, "appstream::startup");
+       if (g_getenv ("GNOME_SOFTWARE_PREFER_LOCAL") != NULL) {
+               as_store_set_add_flags (plugin->priv->store,
+                                       AS_STORE_ADD_FLAG_PREFER_LOCAL);
+       }
        ret = as_store_load (plugin->priv->store,
                             AS_STORE_LOAD_FLAG_APP_INFO_SYSTEM |
                             AS_STORE_LOAD_FLAG_APP_INFO_USER |