#!/usr/bin/env bash

 #

 # Author: Markus Wenzel, TU Muenchen

 #

 # Isabelle tool wrapper.

 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

 splitarray ":" "$ISABELLE_TOOLS"; TOOLS=("${SPLITARRAY[@]}")

 ## diagnostics

 function usage()

 {

   echo

   echo "Usage: $PRG NAME [ARGS ...]"

   echo

   echo "  Start Isabelle tool NAME with ARGS; pass \"-?\" for tool specific help."

   echo

   echo "  Available tools are:"

   for DIR in "${TOOLS[@]}"

   do

     if [ -d "$DIR" ]; then

       for TOOL in "$DIR"/*

       do

         if [ -f "$TOOL" -a -x "$TOOL" ]; then

           NAME="$(basename "$TOOL")"

           DESCRLINE="$(fgrep DESCRIPTION: "$TOOL" | sed -e 's/^.*DESCRIPTION: *//')"

           echo "    $NAME - $DESCRLINE"

         fi

       done

     fi

   done

   exit 1

 }

 function fail()

 {

   echo "$1" >&2

   exit 2

 }

 ## args

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

 TOOLNAME="$1"

 shift

 ## main

 for DIR in "${TOOLS[@]}"

 do

   TOOL="$DIR/$TOOLNAME"

   [ -f "$TOOL" -a -x "$TOOL" ] && exec "$TOOL" "$@"

 done

 fail "Unknown Isabelle tool: $TOOLNAME"