#!/bin/sh

nargs=$#
args="$*"

# error message function
err () {
	echo "`basename $0`: $@" 1>&2
	exit 1
}

# Add to the path variable named by $1 the component $2.  $3 must be
# "append" or "prepend" to indicate where the component is added.

addpath () {
    eval value=\"\$$1\"
    case "$value" in
	*:$2:*|*:$2|$2:*|$2)
	    result="$value"
	    ;;
	"")
	    result="$2"
	    ;;
	*)
	    case "$3" in
		p*)
		    result="$2:${value}"
		    ;;
		*)
		    result="${value}:$2"
		    ;;
	    esac
    esac
    eval $1=$result
    unset result value
}

# convenience routine which appends a string to a path.
append () {
    addpath "$1" "$2" append
}

# convenience routine which prepends a string to a path.
prepend () {
    addpath "$1" "$2" prepend
}


case "X${ARBHOME}" in
  X)
	if [ -x /usr/arb/bin/arb ];then
		ARB=/usr/arb/bin/arb
	else
	      case "$0" in
		/*)
		       ARB="$0";;
		*)
		     if ARB=`which $0`; then
		       echo $ARB
		     else
		       ARB=`pwd`/$0
		     fi;;
	      esac
	fi

	ARBBIN=`dirname $ARB`
	export ARBBIN
	ARBHOME=`dirname $ARBBIN`
	export ARBHOME
    	echo "Environment Variable ARBHOME was empty"
esac

echo "Using ARBHOME='$ARBHOME'"

prepend PATH			$ARBHOME/bin
prepend LD_LIBRARY_PATH		$ARBHOME/lib
append  LD_LIBRARY_PATH		/usr/dt/lib
append  LD_LIBRARY_PATH		/usr/openwin/lib
append  LD_LIBRARY_PATH		$ARBHOME/lib/addlibs
prepend SHLIB_PATH		$ARBHOME/lib
append  SHLIB_PATH		$ARBHOME/lib/addlibs

# environment variables that this shell script sets/changes:
export LD_LIBRARY_PATH MANPATH PATH ARBHOME SHLIB_PATH

# global envs:

export PWD HOME USER

if [ -x $ARBHOME/bin/ghostview ] ; then
  GS_LIB="$ARBHOME/DEPOT/ghostscript"
  export GS_LIB
fi

ARB_PID="$$"; export ARB_PID

ARB_PROPERTIES=${HOME}/.arb_prop

if [ ! -d ${ARB_PROPERTIES} ] ; then
  echo "Directory ${ARB_PROPERTIES} not found - creating ..."
  mkdir ${ARB_PROPERTIES}
fi

if [ "X$ARBMACROHOME" = "X" ] ; then
  ARBMACROHOME="${ARB_PROPERTIES}/macros";
  export ARBMACROHOME
fi
if [ ! -d ${ARBMACROHOME} ] ; then
  echo "Directory $ARBMACROHOME not found - creating ..."
  mkdir ${ARBMACROHOME}
fi

if [ "X$ARBMACRO" = "X" ] ; then
  ARBMACRO="$ARBHOME/lib/macros"
  export ARBMACRO
fi
if [ ! -d ${ARBMACRO} ] ; then
  echo "Directory $ARBMACRO not found - creating ..."
  mkdir ${ARBMACRO}
fi

if [ "X$GDE_HELP_DIR" = "X" ] ; then
  GDE_HELP_DIR="$ARBHOME/GDEHELP"
  export GDE_HELP_DIR
fi

# Default Texteditor/CMDTOOL used by ARB
. $ARBHOME/lib/config.`uname`

# save LD_LIBRARY_PATH
ARB_LIBRARY_PATH="${LD_LIBRARY_PATH}"
export ARB_LIBRARY_PATH

if [ "$args" = "shell" ]; then
    echo "Opening an ARB shell"
    sh
else    
    if [ "$1" = "trace" ]; then
        shift
        $ARBHOME/SH/arb_trace $*
    else
        echo "Please wait while the program ARB is starting ....."
        (arb_ntree $args;arb_clean >/dev/null 2>&1;echo ARB done) &
    fi
fi