#! /bin/sh
###
### Front-end dispatch for key-management scripts
###
### (c) 2011 Mark Wooding
###

###----- Licensing notice ---------------------------------------------------
###
### This program is free software; you can redistribute it and/or modify
### it under the terms of the GNU General Public License as published by
### the Free Software Foundation; either version 2 of the License, or
### (at your option) any later version.
###
### This program is distributed in the hope that it will be useful,
### but WITHOUT ANY WARRANTY; without even the implied warranty of
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
### GNU General Public License for more details.
###
### You should have received a copy of the GNU General Public License
### along with this program; if not, write to the Free Software Foundation,
### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

set -e

quis=${0##*/}
PACKAGE=@PACKAGE@
VERSION=@VERSION@

: ${KEYS=@pkgconfdir@}
: ${KEYSLIB=@pkglibdir@}
export KEYS KEYSLIB

###--------------------------------------------------------------------------
### Help.

usage="usage: $quis COMMAND [ARGUMENTS ...]"

version () {
  echo "$PACKAGE version $VERSION"
}

help () {
  rc=0
  version
  case $# in
    0)
      cat <<EOF

$usage

Options:
  -h		Show this help text.
  -v		Show the program version number.

Commands installed:
EOF
      cd "$KEYSLIB"
      for i in *; do
	case "$i" in *.*) continue ;; esac
	if [ ! -x "$i" ]; then continue; fi
	sed -n "/<<HELP/{n;s/^/	$i /;p;q;}" "$i"
      done
      ;;
    *)
      for i in "$@"; do
	echo
	if [ ! -x "$KEYSLIB"/"$i" ]; then
	  echo >&2 "$quis: unrecognized command \`$i'"
	  rc=1
	  continue
	elif ! KEYS_HELP=t "$KEYSLIB"/"$i"; then
	  rc=1
	fi
      done
      ;;
  esac
  return $rc
}

###--------------------------------------------------------------------------
### Command dispatch.

while getopts "hv" opt; do
  case "$opt" in
    h) help; exit ;;
    v) version; exit ;;
    *) echo >&2 "$usage"; exit 1 ;;
  esac
done
shift $((OPTIND - 1))

case $# in 0) echo >&2 "$usage"; exit 1 ;; esac
cmd=$1; shift
case "$cmd" in help) help "$@"; exit ;; esac
if [ ! -x "$KEYSLIB"/"$cmd" ]; then
  echo >&2 "$quis: unrecognized command \`$cmd'"
  exit 1
fi

unset KEYS_HELP
exec "$KEYSLIB"/"$cmd" "$@"

###----- That's all, folks --------------------------------------------------