#!/bin/sh

# $Header$

#

#

# startup script for smalltalk

# actually, simply calls stx, passing all arguments.

#

# In previous versions, smalltalk used to be the executable itself.

# This lead to problems on systems, where things like LD_LIBRARY_PATH

# should be set in advance. 

# Now, here is a place to do such things ...

#

# -x name specifies an explicit executable

#         to avoid executing another stx from some directory along the PATH

#         (i.e to force use: ./smalltalk -x ./stx)

#

# -X name specifies an explicit path to the stx executable 

#         to avoid executing another stx from some directory along the PATH

#         (i.e to force use: ./smalltalk -X .)

#         [almost the same as above]

#

# -ldd    show ldd-output (to debug, which libs are loaded)

#

# all other args go to stx & the user classes

#

STX=stx

STX_BINDIR=.

DEBUGGER=

if test -x `dirname $0`/stx; then

    STX_BINDIR=`dirname $0`

    STX=$STX_BINDIR/stx

#    cd $STX_BINDIR

fi

if [ "$STX_LIBDIR" != "" ]

then

    if [ ! -f $STX_LIBDIR/smalltalk.rc ]

    then

       echo "smalltalk [warning]: ignore wrong STX_LIBDIR setting"

       STX_LIBDIR=""

    fi

fi

# notice: STXLIBDIR is filled in here by install-sh script

if test -z "$STX_LIBDIR"

then

    bindir=`dirname $0`

    case "$bindir" in

        /* )

        ;;

        .* )

        bindir=`( cd $bindir; pwd ) 2> /dev/null`

        ;;

    esac

    if [ -d ${bindir}/../lib ]

    then

        STX_LIBDIR=`cd ${bindir}/../lib ; pwd`

    fi

fi

if [ -z "$STX_LIBDIR" ]

then

    if [ -d ../lib ]

    then

        STX_LIBDIR=`cd ../lib ; pwd`

    fi

fi

if [ ! -d "$STX_LIBDIR" ]

then

    if [ -d ../lib ]

    then

        STX_LIBDIR=`cd ../lib ; pwd`

    fi

fi

if test -z "$STX_PACKAGEDIR"

then

    if [ -d ../packages ]

    then

        STX_PACKAGEDIR=`cd .. ; pwd`

    else

        if [ -d $STX_LIBDIR/../packages ]

        then

            STX_PACKAGEDIR=`cd $STX_LIBDIR/../packages ; pwd`

        else

            if [ -f $STX_BINDIR/smalltalk.rc ]

            then

                STX_PACKAGEDIR=`cd $STX_BINDIR/../../.. ; pwd`

            fi

        fi

    fi

fi

if test -z "$STX_TOPDIR"

then

    if [ -f ../lib/smalltalk.rc ]

    then

        STX_TOPDIR=`cd .. ; pwd`

    else

       if [ -f $STX_LIBDIR/../lib/smalltalk.rc ]

       then

           STX_TOPDIR=`cd $STX_LIBDIR/.. ; pwd`

       else

           if [ -f $STX_BINDIR/smalltalk.rc ]

           then

              STX_TOPDIR=`cd $STX_BINDIR/../.. ; pwd`

           fi

       fi

    fi

fi

# echo STX_LIBDIR is $STX_LIBDIR

# echo STX_TOPDIR is $STX_TOPDIR

# echo STX_PACKAGEDIR is $STX_PACKAGEDIR

export STX_LIBDIR STX_PACKAGEDIR STX_TOPDIR

# echo STX is $STX

if [ "$1" = "--help" ]

then    

    echo "

usage: smalltalk [-x prog] [-X dir] [--ldd] [--gdb] 

args to startup script:

   -x prog ................ use prog instead of stx as executable

   -X dir ................. use stx from dir instead of default (PATH)

   --ldd .................. show which shared libraries are used

   --gdb .................. run with gdb-Debugger (type r in debugger to start)

   --cgdb ................. run with cgdb-Debugger (type r in debugger to start)

   --callgrind ............ run under callgrind profiler tool

   --stap SCRIPT .......... run given systemtap script, passing stx command as 

                            stap -c 'stx ...' Systemtap may not be compiled in.

"

    exec $STX --help

    exit 0

fi

if [ "$1" = "-x" ]

then

    shift

    STX=$1

    shift

fi

if [ "$1" = "-X" ]

then

    shift

    STX=$1/stx

    shift

fi

if [ "$1" = "--gdb" ]

then

    shift

    DEBUGGER=gdb

fi

if [ "$1" = "--cgdb" ]

then

    shift

    DEBUGGER=cgdb

fi

if [ "$1" = "--callgrind" ]

then

    shift

    DEBUGGER="valgrind --tool=callgrind --instr-atstart=no"

fi

if [ "$1" = "--stap" ]

then

    shift

    if [ -z "$1" ]; then 

        echo "--stap requires systemtap script to run"

        exit 1

    fi

    if [ ! -r "$1" ]; then

        echo "$1 is not a readable systemtap script"

        echo "--stap requires systemtap script to run"

        exit 1

    fi

    STAPSCRIPT=$1

    shift

fi

if [ "$1" = "--ldd" ]

then

    shift

    DEBUGLIB=yes

fi

#

#

# some have Xlibs in /usr/openwin/lib ...

#

if [ -d /usr/openwin/lib ]

then

    if [ "$LD_LIBRARY_PATH" != "" ]

    then

    LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/openwin/lib:/usr/local/lib/smalltalk/lib

    else

    LD_LIBRARY_PATH=/usr/openwin/lib:/usr/local/lib/smalltalk/lib

    fi

    if [ "$SHLIB_PATH" != "" ]

    then

    SHLIB_PATH=$SHLIB_PATH:/usr/openwin/lib:/usr/local/lib/smalltalk/lib

    else

    SHLIB_PATH=/usr/openwin/lib:/usr/local/lib/smalltalk/lib

    fi

else

    if [ "$LD_LIBRARY_PATH" != "" ]

    then

    LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib/smalltalk/lib

    else

    LD_LIBRARY_PATH=/usr/local/lib/smalltalk/lib

    fi

    if [ "$SHLIB_PATH" != "" ]

    then

    SHLIB_PATH=$SHLIB_PATH:/usr/local/lib/smalltalk/lib

    else

    SHLIB_PATH=/usr/local/lib/smalltalk/lib

    fi

fi

#

# my own libs may be found in STX_LIBDIR/lib

# STX_LIBDIR is to be set to the top of the smalltalk installation

# (i.e. where all the .rc files are located)

#

if [ "$STX_LIBDIR" != "" ]

then

    if [ "$STX_LIBDIR" != "/usr/local/smalltalk" ]

    then

    LD_LIBRARY_PATH=$STX_LIBDIR:$STX_LIBDIR/lib:$LD_LIBRARY_PATH

    SHLIB_PATH=$STX_LIBDIR:$STX_LIBDIR/lib:$SHLIB_PATH

    fi

else

    STX_LIBDIR=$STX_BINDIR

fi

#

# and in STX_BINDIR

#

if [ "$STX_BINDIR" != "" ]

then

    if [ "$STX_BINDIR" != "/usr/local/bin" ]

    then

    LD_LIBRARY_PATH=$STX_BINDIR:$LD_LIBRARY_PATH

    SHLIB_PATH=$STX_BINDIR:$SHLIB_PATH

    fi

fi

LD_LIBRARY_PATH=.:./lib:$LD_LIBRARY_PATH

SHLIB_PATH=.:./lib:$SHLIB_PATH

export LD_LIBRARY_PATH

export SHLIB_PATH

#

# if started via ./smalltalk, prepend . to the PATH 

# (to allow test of ./stx even when stx is found along the PATH)

#

case $0 in

    ./*)

    PATH=.:$PATH

    export PATH

    ;;

esac

#

# debugging which stx & shared libs are used ...

#

whichOne=`/bin/sh -c "type $STX"`

if [ "$STX" = "stx" ]

then

  if [ -f stx ]

  then

    whichOne=`/bin/sh -c "type stx"`

    if [ "$whichOne" != "stx is ./stx" ]

    then

      echo "************* WARNING the executed" $whichOne

      echo "************* (may not be appropriate for used shared libs)"

      echo "************* Try './smalltalk -ldd' for more details"

      echo "************* or force the local stx to be used with"

      echo "************* './smalltalk -x ./stx'"

      echo

    fi

  fi

fi

if [ "$DEBUGLIB" = "yes" ]

then

  echo "used " $whichOne

  echo "used LD_LIBRARY_PATH is " $LD_LIBRARY_PATH

  echo "used SHLIB_PATH is " $SHLIB_PATH

  echo "used STX_LIBDIR is " $STX_LIBDIR

  case `uname` in

    HP-UX*)

      chatr $STX

      ;;

    *)

      ldd -r $STX

      ;;

  esac

fi

#

# how did HP mess up things so badly ?

# It takes a veeeery long time for stx to start

# (the spinning wheel is shown when stx's main 

#  starts to run - all the time in between is

#  spent in the systems loader ...)

#

# if [ "`uname`" = "HP-UX" ]

# then

#     echo "Please be patient - hp systems are very slow."

# fi

PATH=$PATH:$STX_BINDIR

export PATH

# echo PATH is $PATH

# echo DISPLAY is $DISPLAY

if [ ! -z "$STAPSCRIPT" ]; then

    echo "$STX_TOPDIR/stx/hacking/tapset"

    CMD="$STX $@"

    echo "$CMD"

    exec stap --unprivileged $STAPSCRIPT -I "$STX_TOPDIR/hacking/tapset" -c "$CMD"

fi

exec $DEBUGGER $STX ${1+"$@"}