#!/bin/sh

BASEDIR=$(cd $(dirname "${BASH_SOURCE[0]}")/.. && pwd)
SSH_KEY=${BASEDIR}/$(ls ${BASEDIR} | egrep '.pem$' | head -n 1)

if [ $# -lt 1 ]; then
  >&2 echo "Execute command on each host."
  >&2 echo "Usage: $0 <cmd> | $0 -f <file>"
  exit 1
fi

NOMASTER=0
if [ "$1" == "--no-master" ]; then
  NOMASTER=1
  shift
fi

if [ "$1" == "-f" ]; then
  file=$2
else
  cmd="$@"
fi

user=$(whoami)
N=0
for host in $(cat ${BASEDIR}/hosts | grep -v "^#" | awk '{print $1}')
do
  if [ "${NOMASTER}" == "1" ] && cat ${BASEDIR}/hosts | grep "master" | grep ${host} >/dev/null
  then
    continue
  fi

  N=$(expr ${N} + 1)
  if [ "x${cmd}" != "x" ]; then
    exe_cmd=$(echo "${cmd}" | sed "s/\${N}/${N}/")
    echo "${user}@${host}> ${exe_cmd}"
    echo "${exe_cmd}" | ssh -T ${host}
  else
    echo "${user}@${host}> ${file}"
    ${file}> ssh -T ${host}
  fi
  echo "(exit $?)"
  echo ""
done