#!/usr/bin/env bash
#
# $Id: isatool,v 1.22 2005/05/17 07:58:47 wenzelm Exp $
# Author: Markus Wenzel, TU Muenchen
#
# Isabelle tool starter.

if [ -L "$0" ]; then
  TARGET="$(LC_ALL=C ls -l "$0" | sed 's/.* -> //')"
  exec "$(cd "$(dirname "$0")"; cd "$(pwd -P)"; cd "$(dirname "$TARGET")"; pwd)/$(basename "$TARGET")" "$@"
fi


## settings

PRG="$(basename "$0")"

ISABELLE_HOME="$(cd "$(dirname "$0")"; cd "$(pwd -P)"; cd ..; pwd)"
source "$ISABELLE_HOME/lib/scripts/getsettings" || exit 2


## diagnostics

function usage()
{
  echo
  echo "Usage: $PRG TOOL [ARGS ...]"
  echo
  echo "  Start Isabelle utility program TOOL with ARGS. Pass \"-?\" to TOOL"
  echo "  for more specific help."
  echo
  echo "  Available tools are:"
  (
    ORIG_IFS="$IFS"
    IFS=":"
    for DIR in $ISABELLE_TOOLS
    do
      cd "$DIR"
      for T in *
      do
        if [ -f "$T" -a -x "$T" ]; then
          DESCRLINE=$(fgrep DESCRIPTION: "$T" | sed -e 's/^.*DESCRIPTION: *//')
          echo "    $T - $DESCRLINE"
        fi
      done
    done
    IFS="$ORIG_IFS"
  )
  exit 1
}

function fail()
{
  echo "$1" >&2
  exit 2
}


## args

[ "$#" -lt 1 -o "$1" = "-?" ] && usage

TOOLNAME="$1"
shift


## main

ORIG_IFS="$IFS"
IFS=":"
for DIR in $ISABELLE_TOOLS
do
  TOOL="$DIR/$TOOLNAME"
  [ -f "$TOOL" -a -x "$TOOL" ] && exec "$TOOL" "$@"
done
IFS="$ORIG_IFS"

fail "Unknown Isabelle tool: $TOOLNAME"
