libvirtxml unmarshaling of SystemInfo seems missing/broken

Hello,

I am trying to get the SystemInfo using the Go API, similarly to what I do for example when getting capabilities.

Getting capabilities is as easy as doing:

    var (
        err error
        xmldata string
        caps libvirtxml.Caps
    )

    xmldata, err = hv.conn.GetCapabilities()
    err = caps.Unmarshal(xmldata)

Instead, there is no SystemInfo.Unmarshal(), so one is left attempting to use libvirtxml.DomainSysInfo , which contains similar information, but the only APIs I could find require roughly this mess:

    var (
        smbios libvirtxml.DomainSysInfo
        r io.Reader
        decoder *xml.Decoder
        start xml.StartElement
        attr xml.Attr
    )
    xmldata, err = hv.conn.GetSysinfo(0)
    r = strings.NewReader(xmldata)
    decoder = xml.NewDecoder(r)
    attr = xml.Attr {
        Name:  xml.Name { Local: "type" },
        Value: "smbios",
    }
    start = xml.StartElement {
        Name: xml.Name { Local: "sysinfo" },
        Attr: []xml.Attr { attr },
    }
    err = smbios.UnmarshalXML(decoder, start)

    /* I get err="EOF" here! */

The issues I see are:

1. It is cumbersome not to have a SysInfo type with the .Unmarshal() method, just like Caps for capabilities, to avoid all the error-prone stuff above.

2. I still do not get it to parse the XML correctly, I keep getting err=="EOF". I am trying to get the SMBIOS part of the structure filled, and it is not evident to me what is going wrong.