[gnome-software] Allow the metadata to select the minimum required client version

[Richard Hughes <rhughes src gnome org>]

commit aa1179f69a68d55571bee9974663474e78c44c5d
Author: Richard Hughes <richard hughsie com>
Date:   Wed Dec 21 15:58:54 2016 +0000

    Allow the metadata to select the minimum required client version
    
    This allows us to have new markup specified in the AppData or AppStream XML:
    
      <requires>
        <id compare="ge" version="3.24.0">org.gnome.Software.desktop</id>
      </requires>
    
    If this <component> should only be shown in newer versions of gnome-software.
    Be careful if you use this feature, as commits may be backported into older
    releases.

 src/plugins/gs-appstream.c |   21 +++++++++++++++++++++
 1 files changed, 21 insertions(+), 0 deletions(-)
---
diff --git a/src/plugins/gs-appstream.c b/src/plugins/gs-appstream.c
index bb5e24f..7af6954 100644
--- a/src/plugins/gs-appstream.c
+++ b/src/plugins/gs-appstream.c
@@ -511,6 +511,10 @@ gs_appstream_refine_app (GsPlugin *plugin,
                         AsApp *item,
                         GError **error)
 {
+#if AS_CHECK_VERSION(0,6,7)
+       AsRequire *req;
+       g_autoptr(GError) error_local = NULL;
+#endif
        GHashTable *urls;
        GPtrArray *array;
        GPtrArray *pkgnames;
@@ -538,6 +542,23 @@ gs_appstream_refine_app (GsPlugin *plugin,
                gs_app_set_state (app, as_app_get_state (item));
        }
 
+#if AS_CHECK_VERSION(0,6,7)
+       /* is compatible */
+       req = as_app_get_require_by_value (item,
+                                          AS_REQUIRE_KIND_ID,
+                                          "org.gnome.Software.desktop");
+       if (req != NULL) {
+               if (!as_require_version_compare (req, PACKAGE_VERSION, &error_local)) {
+                       g_set_error (error,
+                                    GS_PLUGIN_ERROR,
+                                    GS_PLUGIN_ERROR_NOT_SUPPORTED,
+                                    "not for this gnome-software: %s",
+                                    error_local->message);
+                       return FALSE;
+               }
+       }
+#endif
+
        /* types we can never launch */
        switch (gs_app_get_kind (app)) {
        case AS_APP_KIND_ADDON: