#!/bin/bash
set -euo pipefail

ssh_register_node() {
    local alias="$1"
    local ip="$2"
    local config_file="${HOME}/.ssh/config"

    if [[ ! -f "${config_file}" ]]; then
        touch "${config_file}"
        chmod 600 "${config_file}"
    fi

    if ! grep -q "Host.*[[:space:]]${alias}\([[:space:]]\|$\)" "${config_file}" 2>/dev/null; then
        printf "\nHost %s\n    Hostname %s\n" "${alias}" "${ip}" >> "${config_file}"
    fi
}