#!/usr/bin/env bash

#

# $Id$

# Author: Markus Wenzel, TU Muenchen

# License: GPL (GNU GENERAL PUBLIC LICENSE)

#

# Isabelle tool starter -- provides settings environment

# and keeps your PATH name space clean.

## settings

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

ISABELLE_HOME="$(dirname "$0")/.."

. "$ISABELLE_HOME/lib/scripts/getsettings" || \

  { echo "$PRG probably not called from its original place!"; 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"

      echo

      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"

  )

  echo

  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"