Chroot: Now use a network unit for systemd-networkd

debian/chroot.install

@@ -201,28 +201,31 @@ sed -i 's;target;;g' /target/etc/fstab
 sed -i 's;//;;g' /target/etc/fstab
 ## }}}
 ## Network {{{
+### Get all informations from current network configuration in rescue mode
 net_device=$(ip r | grep "^default" | head -1 | cut -d" " -f5)
 net_address=$(ip r | grep -vE "(^default|metric)" | grep "${net_device}.*src" | head -1 | awk -F" " '{print $NF}')
+read -r net_mac_address </sys/class/net/"${net_device}"/address
 net_netmask=$(ipcalc "${net_address}" | awk '/Netmask:/{print $2;}')
+net_netmask_cidr=$(ipcalc "${net_address}" | awk '/Netmask:/{print $4;}')
 net_broadcast=$(ip a s dev "${net_device}" | awk '/inet.*brd/{print $4}')
 net_network=$(ip r | grep -vE "(^default|metric)" | grep "src ${net_address}" | head -1 | cut -d"/" -f1)
 net_gateway=$(ip r | grep "^default" | head -1 | cut -d" " -f3)
 
-printf '%b' "auto lo
-iface lo inet loopback
+### Create a network unit for systemd-networkd
+printf '%b' "[Match]
+MACAddress=${net_mac_address}
 
-auto ${net_device}
-iface ${net_device} inet static
-	address ${net_address}
-	netmask ${net_netmask}
-	network ${net_network}
-	broadcast ${net_broadcast}
-	gateway ${net_gateway}
-	# FDN DNS - https://www.fdn.fr/actions/dns/
-	dns-nameserver 80.67.169.12
-	dns-nameserver 80.67.169.40
+[Network]
+Description=network interface with default route without dhcp
+DHCP=no
+Address=${net_address}/${net_netmask_cidr}
+Gateway=${net_gateway}
+IPv6AcceptRA=no
+DNS=80.67.169.12
+" > /target/etc/systemd/network/50-default.network
 
-source-directory /etc/network/interfaces.d" > /target/etc/network/interfaces
+### Ensure to enable systemd-networkd at startup
+chroot /target systemctl enable systemd-networkd
 
 ## }}}
 ## Ensure to remount device {{{