#!/bin/bash

#
# determine the LOGON root directory, assuming this script resides in a 
# `bin' sub-directory that is shared across platforms.
#
if [ -z "${LOGONROOT}" ]; then
  path=$(dirname $0)
  if [ "${path#./}" != "${path}" ]; then
    path="$(pwd)/${path#./}"
  fi
  if [ "${path#/}" = "${path}" ]; then
    if [ "${path}" = "." ]; then
      path="$(pwd)";
    else 
      path="$(pwd)/${path}"
    fi
  fi
  LOGONROOT="${path%/bin}";
  export LOGONROOT;
fi

#
# include a shared set of shell functions and global parameters, including the
# architecture identifier .LOGONOS.
#
. ${LOGONROOT}/etc/library.bash;

#
# as of mid-2011, the standard (i.e. more or less supported) LOGON binaries 
# are always 32-bit; why duplicate the build effort, for no obvious benefit in
# in running 64-bit PET binaries?                               (5-aug-11; oe)
#
if [ "${1}" == "-s" -o "${1}" == "--stable" ]; then
  #
  # for legacy users, a 'stable' binary, compiled off release 1.0
  #
  shift 1;
  LOGONOS=linux.x86.32;
  binary=${LOGONROOT}/uio/bin/${LOGONOS}/sflop;
elif [ "${1}" == "-t" -o "${1}" == "--test" ]; then
  #
  # for developers, a 'testing' binary (possibly compiled off some branch)
  #
  shift 1;
  LOGONOS=linux.x86.32;
  binary=${LOGONROOT}/uio/bin/${LOGONOS}/tflop;
elif [ "${1}" == "-l" -o "${1}" == "--local" ]; then
  #
  # use a locally compiled binary, external to the LOGON tree
  #
  shift 1;
  binary=${HOME}/src/pet/trunk/debug/flop/flop;
else
  #
  # the 'standard' binary, compiled off the (latest and greatest) trunk
  #
  binary=${LOGONROOT}/uio/bin/${LOGONOS}/flop;
fi

#
# set up dynamic linker search path, so as to find our shared libraries
#
if [ "${LOGONOS%%.*}" == "linux" ]; then
  if [ -z "${LD_LIBRARY_PATH}" ]; then
    LD_LIBRARY_PATH=${LOGONROOT}/uio/lib/${LOGONOS};
  else
    LD_LIBRARY_PATH=${LOGONROOT}/uio/lib/${LOGONOS}:${LD_LIBRARY_PATH};
  fi
  export LD_LIBRARY_PATH;
fi

[ -x "${binary}" ] || binary=${LOGONROOT}/uio/bin/${LOGONOS}/flop;
exec ${binary} "$@"