#!/bin/sh
set -e

#host="$1"
id="$HOME/.ssh/id_rsa.pub";

[ -e "$id" ] || ssh-keygen

read key < "$id" || exit 1;

remote_cmd='
  test -d "$HOME/.ssh" || mkdir -m 0700 "$HOME/.ssh" || exit 1;
  if grep "^'"$key"'$" "$HOME/.ssh/authorized_keys" >/dev/null 2>&1; then
    echo already authorized;
    exit;
  else
    echo '"$key"' >> "$HOME/.ssh/authorized_keys";
  fi
'; # remote_cmd

ssh "$@" "$remote_cmd" || exit 1;