[packagekit] [Q] How "GetDepends" connect with "get_depends"

[NZzi]

NZzi wrote:
> 
> hi all:
> 
> i wonder how "pkcon get-updates package" implement,


sorry, is "pkcon get-depends package", not "pkcon get-update
package"


> so i browse packagekit code, but i know little
> about dbus, so after a whole day, i still can not
> understand how "GetDepends" connect with "get_depends".
> 
> i browse from pk-console.c:
> 
> } else if (strcmp (mode, "get-depends") == 0) {
>     ...
>     ret = pk_console_get_depends (client, filters, value, &error);
> }
> 
> pk_console_get_depends()->pk_client_get_depends()->
> ret = dbus_g_proxy_call (client->priv->proxy, "GetDepends", error,...)
> 
> i study some dbus docs, i konw dbus_g_proxy_call() call
> "GetDepends" method through proxy object(client->priv->proxy),
> but the "real" dependency-process function is get-depends() in
> yumBackend.py. and i found it's backend_get_depends()(in
> pk-backend-yum.c) invokd the get-depends().
> 
> but i don't know how dbus_g_proxy_call (client->priv->proxy, 
> "GetDepends"...)
> invoke backend_get_depends()(in pk-backend-yum.c)
> 
> can anyone give me some hints, thanks advance
>