#! /bin/sh

TOP_DIR=$(dirname $0)
LAST_DIR=$PWD

if test ! -f $TOP_DIR/configure.ac; then
   echo "You must execute this script from the top level directory."
   exit 1
fi

# hack for freebsd -- jilles
[ -d /usr/local/libexec/autoconf259 ] && PATH="$PATH:/usr/local/libexec/autoconf259"
[ -d /usr/local/libexec/automake19 ] && PATH="$PATH:/usr/local/libexec/automake19"

AUTOCONF=${AUTOCONF:-autoconf}
ACLOCAL=${ACLOCAL:-aclocal}
AUTOHEADER=${AUTOHEADER:-autoheader}

dump_help_screen ()
{
   echo "Usage: $0 [options]"
   echo 
   echo "options:"
   echo "  -n           skip CVS changelog creation"
   echo "  -h,--help    show this help screen"
   echo
   exit 0
}

parse_options ()
{
   while test "$1" != ""; do
      case $1 in
         -h|--help)
            dump_help_screen
            ;;
         -n)
            SKIP_CVS_CHANGELOG=yes
            ;;
         *)
            echo Invalid argument - $1
            dump_help_screen
            ;;
      esac
      shift
   done
}

run_or_die ()
{
   COMMAND=$1
   
   # check for empty commands
   if test -z "$COMMAND"; then
      echo "*warning* no command specified"
      return 1
   fi

   shift;

   OPTIONS="$@"
   
   # print a message
   echo -n "*info* running $COMMAND"
   if test -n "$OPTIONS"; then
      echo " ($OPTIONS)"
   else
      echo
   fi

   # run or die
   $COMMAND $OPTIONS; RESULT=$?
   if test $RESULT -ne 0; then
      echo "*error* $COMMAND failed. (exit code = $RESULT)"
      exit 1
   fi
   
   return 0
}

parse_options "$@"

cd $TOP_DIR

run_or_die $ACLOCAL -I m4
run_or_die $AUTOHEADER
run_or_die $AUTOCONF

cd $LAST_DIR