#! /bin/sh -f
##############################################################################
#
# remexec
#
##############################################################################

##### Parse Option ###########################################################
while getopts "h:u:" FLAG; do
  case ${FLAG} in
  h) TARGET="${OPTARG}" ;;
  u) REMUSER="${OPTARG}@" ;;
  esac
done
shift $(( ${OPTIND} - 1 ))

SCRIPTS="${@}"

if [ -z "$TARGET" -o -z "${SCRIPTS}" ]; then
  echo >&2 "Usage: $0 -h Target [-u user] scripts"
  exit 1
fi

if [ -z "${REMUSER}" ]; then
  REMUSER="${USER}@"
fi

##### Check Scripts ##########################################################
ERROR=0
for i in ${SCRIPTS}; do
  if [ ! -e "${i}" ]; then
    echo "Error ${i} is not exist"
    ERROR=1
  fi
done

if [ ${ERROR} -ne 0 ]; then
  exit 1
fi

unset ERROR

##### Generate Scripts #######################################################
atexit() {
  [ ! -z "${TMPFILE}" ] && rm -f "${TMPFILE}"
}
trap atexit EXIT
trap 'trap - EXIT; atexit; exit -1' INT PIPE TERM

TMPFILE=$(mktemp)

cat << __END__ >> ${TMPFILE}
#! /bin/sh
##### Preamble
SUDO=`which sudo`
[ -z "\${SUDO}" ] && echo "Do not have sudo!. exit" && exit 1
__END__

for i in ${SCRIPTS}; do
  echo "##### from ${i}" >> ${TMPFILE}
  cat ${i} >> ${TMPFILE}
done

##### Execute Scripts ########################################################
TGTSCR=`ssh -q ${REMUSER}${TARGET} mktemp`
scp -q -rp ${TMPFILE} "${REMUSER}${TARGET}:${TGTSCR}"
ssh -q -t "${REMUSER}${TARGET}" "/bin/sh ${TGTSCR}"
ssh -q "${REMUSER}${TARGET}" "/bin/rm ${TGTSCR}"