initrd-network_install

#!/usr/bin/env bash

check_systemd_hook()
{
    declare -F add_systemd_unit > /dev/null 2>&1
    if [[ ! $? -eq 0 ]]; then
        echo "systemd hook is not enabled; exit"
        return 1
    fi
}

check_network_file()
{
    ls /etc/systemd/network/*.initramfs > /dev/null 2>&1
    if [[ $? -ne 0 ]]; then
        echo "network hook is enabled, but there are no .initramfs files under\
/etc/systemd/network; exit"
        return 1
    fi
}

add_network_user()
{
    cat << EOF >> "${BUILDROOT}/etc/passwd"
systemd-network:x:1999:1999:systemd Network Management:/:/usr/bin/nologin
EOF
    cat << EOF >> "${BUILDROOT}/etc/group"
systemd-network:x:1999:
EOF
    cat << EOF >> "${BUILDROOT}/etc/shadow"
systemd-network:!*:18420::::::
EOF
}

build ()
{
    check_systemd_hook || return 0
    check_network_file || return 0
    add_systemd_unit initrd-network.service
    systemctl --root "${BUILDROOT}" enable initrd-network.service
    add_network_user
    mkdir -p "${BUILDROOT}/etc/systemd/network"
    for network in /etc/systemd/network/*.initramfs; do
        initramfs_strip=${network//\.initramfs/}
        echo "Added ${network} to ${initramfs_strip}"
        add_file "${network}" "${initramfs_strip}"
    done
}

help ()
{
    cat << EOF
This hook sets up the `systemd-networkd.service` systemd service and copies
over any `*.initramfs` files in `/etc/systemd/network`.
EOF
}