#if $getVar("system_name","") != ""
mac_exists() { \
    ip -o link | grep -i "$1" 2>/dev/null >/dev/null; \
    return $?; \
}; \
get_ifname() { \
    IFNAME=\$(ip -o link | grep -i "$1" | sed -e 's/^[0-9]*: //' -e 's/:.*//'); \
}; \
    #set ikeys = $interfaces.keys()
    #import re
    #set $vlanpattern = $re.compile("[a-zA-Z0-9]+[\.:][0-9]+")
    #set $routepattern = $re.compile("[0-9/.]+:[0-9.]+")
    #for $iname in $ikeys
        #set $idata         = $interfaces[$iname]
        #set $mac           = $idata["mac_address"]
        #set $static        = $idata["static"]
        #set $management    = $idata["management"]
        #set $ip            = $idata["ip_address"]
        #set $netmask       = $idata["netmask"]
        #set $iface_type    = $idata["interface_type"]
        #set $iface_master  = $idata["interface_master"]
        #set $static_routes = $idata["static_routes"]
        #if not $management or $mac == ""
            #continue
        #end if
if mac_exists $mac; then \
    get_ifname $mac; \
    echo "d-i netcfg/choose_interface string \$IFNAME" >> /tmp/pre_install_network_config; \
        #if $static and $ip != ""
    echo "d-i netcfg/get_ipaddress string $ip" >> /tmp/pre_install_network_config; \
            #if $netmask == ""
                #set $netmask = "255.255.255.0"
            #end if
    echo "d-i netcfg/get_netmask string $netmask" >> /tmp/pre_install_network_config; \
        #else
            #continue
        #end if
fi; \
    #end for
#end if
debconf-set-selections /tmp/pre_install_network_config; \