#! /bin/bash

# modified from upstream fai example
error=0; trap 'error=$(($?>$error?$?:$error))' ERR # save maximum error code

if ! ifclass STABLE; then
    if ifclass VM; then
        # older distro still uses eth0
        if ifclass BELENOS64; then
            NIC1=eth0
        else
            # For a vm, we only get  ID_NET_NAME_MAC from below,
            # but when it reboots, it uses ID_NET_NAME_SLOT.
            NIC1=ens3
        fi
    else
        # get persistent interface name. Note, these class conditions
        # will need to get modified for new oses. testing vm doesn't use
        # it right now, but other vms do I'm sure.
        for field in ID_NET_NAME_FROM_DATABASE \
                         ID_NET_NAME_ONBOARD \
                         ID_NET_NAME_SLOT \
                         ID_NET_NAME_PATH \
                         ID_NET_NAME_MAC; do
            name=$(udevadm info /sys/class/net/$NIC1 | sed -rn "s/^E: $field=(.+)/\1/p")
            if [[ $name ]]; then
                NIC1=$name
                break
            fi
        done
        if [[ ! $name ]]; then
            echo "$0: error: could not find systemd predictable network name"
            exit 1
        fi
    fi
fi

if ifclass DHCPC && [ $FAI_ACTION = "install" -o $FAI_ACTION = "dirinstall" ]
then
    if ifclass VM; then
        cat > $target/etc/network/interfaces <<-EOF
        # generated by FAI
        auto lo $NIC1
        iface lo inet loopback
        iface $NIC1 inet dhcp
EOF
    else
        cat > $target/etc/network/interfaces <<-EOF
        # generated by FAI
        auto lo br0
        iface lo inet loopback
        iface $NIC1 inet manual
        # make a bridge by default so we can have bridged vms.
        # Some example I read had stp on, but i don't need stp,
        # and it causes a vm to fail pxe boot, presumably unless
        # you add some delay.
        # http://wiki.libvirt.org/page/PXE_boot_%28or_dhcp%29_on_guest_failed
        iface br0 inet dhcp
          bridge_ports $NIC1
          bridge_stp off
          bridge_maxwait 0
EOF
    fi
elif [ $FAI_ACTION = "install" -o $FAI_ACTION = "dirinstall" ]
then
    [ -n "$IPADDR" ] && cat > $target/etc/network/interfaces <<-EOF
        # generated by FAI
        auto lo $NIC1
        iface lo inet loopback
        iface $NIC1 inet static
          address $IPADDR
          netmask $NETMASK
          broadcast $BROADCAST
          gateway $GATEWAYS
EOF
    [ -n "$NETWORK" ] && echo "localnet $NETWORK" > $target/etc/networks
    if [ ! -L $target/etc/resolv.conf -a -e /etc/resolv.conf ]; then
	cp -p /etc/resolv.conf $target/etc
    fi
fi

# here fcopy is mostly used, when installing a client for running in a
# different subnet than during the installation
fcopy -iM /etc/resolv.conf
fcopy -iM /etc/network/interfaces /etc/networks

exit $error