#!/usr/bin/env bash
set -eu

usage() {
    echo example: $0 build samhain boot
}

deploy() {
    HOST=$1
    if [ $# -gt 2 ]; then
        METHOD=$2
    else
        METHOD="switch"
    fi

    nix eval --raw deploy.${HOST} -f . | bash -s -- ${METHOD}
}

install() {
    HOST=$1
    nix build -f . hosts.$HOST.config.system.build.toplevel
    CLOSURE=$(readlink result)
    nix-store --export $(nix-store -qR ./result) | ssh root@$HOST nix-store --import --store /mnt
    ssh root@$HOST nixos-install --system $CLOSURE
}

main() {
    if [ $# -lt 2 ]; then
        usage
    else 
        CMD=$1
        shift

        $CMD $@
    fi
}

main "$@"