#!/bin/sh

genesis_is_host_root() {
    [ -f /proc/cmdline ] || return 1
    host_root=$(stat -c '%i %d' / 2>/dev/null) || return 1
    init_root=$(stat -c '%i %d' /proc/1/root/. 2>/dev/null) || return 1
    [ "$host_root" = "$init_root" ]
}

genesis_mknb_exists() {
    [ -x /opt/xcat/sbin/mknb ]
}

genesis_is_service_node() {
    if command -v rpm >/dev/null 2>&1 \
        && rpm -q xCATsn >/dev/null 2>&1; then
        return 0
    fi
    command -v dpkg-query >/dev/null 2>&1 || return 1
    dpkg-query -W -f='${Status}' xcatsn 2>/dev/null \
        | grep -q '^install ok installed$'
}

genesis_uses_shared_tftp() {
    [ -x /opt/xcat/sbin/tabdump ] || return 1
    sharedtftp=$(
        /opt/xcat/sbin/tabdump site 2>/dev/null \
            | awk -F '"' '$2 == "sharedtftp" { print $4; exit }'
    )
    [ "$sharedtftp" = 1 ]
}

genesis_run_mknb() {
    # shellcheck disable=SC1091
    [ ! -r /etc/profile.d/xcat.sh ] || . /etc/profile.d/xcat.sh
    /opt/xcat/sbin/mknb "$1"
}

genesis_activation_main() {
    architecture=$1
    case "$architecture" in
        x86|x86_64|ppc64|ppc64le|armv7hf|aarch64|riscv64) ;;
        *)
            echo "Invalid Genesis architecture: $architecture" >&2
            return 0
            ;;
    esac

    genesis_is_host_root || return 0
    genesis_mknb_exists || return 0
    if genesis_is_service_node && genesis_uses_shared_tftp; then
        return 0
    fi
    if ! genesis_run_mknb "$architecture"; then
        echo "WARNING: mknb $architecture failed; rerun it after xcatd is available." >&2
    fi
    return 0
}

genesis_activation_main "$@"