bin/isatool

make symlink handling compatible with whitespaces

#!/usr/bin/env bash
#
# $Id$
# Author: Markus Wenzel, TU Muenchen
#
# Isabelle tool starter -- provides settings environment
# and keeps your PATH name space clean.

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


## 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"