Gtk.RecentManager doesn't flush updates

[Kerrick Staley <mail kerrickstaley com>]

Hello,

I'm trying to modify the recent files list from a Vala program. I construct
a Gtk.RecentManager and call its remove_item() and add_full() methods, but
neither has any effect; the recent files list is unchanged (and
~/.local/share/recently-used.xbel is unmodified). I notice in strace that
it opens ~.local/share/recently-used.xbel as read-only:
    open("/home/kerrick/.local/share/recently-used.xbel", O_RDONLY) = 8
meaning it can't possibly modify the file. What am I doing wrong?

My code follows:
using Gtk;

void main(string[] args)
{
    var rm = RecentManager.get_default();

    string uri = "file://" + Environment.get_current_dir();
    Gtk.RecentData data = Gtk.RecentData();
    data.mime_type = "inode/directory";
    data.app_name = "gnome-terminal";
    data.app_exec = "gnome-terminal";
    rm.add_full(uri, data);
}

Thanks,
Kerrick