Multiple VW versions on Linux

Andres Fortier wrote:
> Hi list,
>         I've moved from Windows to Ubuntu a couple of months ago and for
> the first time I have to deal with moving code from 7.3.1 to 7.4.1,
> which means having two VW installations in Linux. In windows I used to
> make an association between .im and VisualWorks.exe, and then configure
> an .ini file to match images versions with the desired VM. Is there
> anything similar in Linux?

Hello,

we have written simple shell script (see attached vw file) that
uses file utility to determine VW version from image file (see
attached magic file). But you will have to tweak the script to
use proper install dirs and such...

Hope this helps,

Ladislav Lenart

# Magic local data for file(1) command.
# Insert here your local magic data. Format is described in magic(5).

0               string          exec\ visual    Cincom Visual Works
>68             byte            74                                       7.4 image
>68             byte            73                                      7.3 image
>68             byte            72                                      7.2 image
>68             byte            71                                       7.1 image
>68             byte            70                                      7.0 image


#!/bin/bash


VW_INSTALL_DIR=/opt/vw
GS_INSTALL_DIR=/opt/gemstone


# determine image and image version
args=
IMAGE=
for arg in $@; do
        if [ -r "$arg" -a -n "`file -m "$HOME/.fvwm/scripts/magic" "$arg" | grep 'Cincom Visual Works 7\.[0-4] image'`" ]
        then
                IMAGE="$arg"
        else
                args="$args $arg"
        fi
done

if [ -z "$IMAGE" ]
then
        echo "Please specify a valid image file."
        exit 1
fi


VW_VERSION=`file -m "$HOME/.fvwm/scripts/magic" "$IMAGE" | sed -n 's/.*Cincom Visual Works \(7\.[0-4]\) image/\1/p'`


if [ ! -d "$VW_INSTALL_DIR/$VW_VERSION" -o ! -x "$VW_INSTALL_DIR/$VW_VERSION/bin/linux86/visual" ]
then
        echo "No VisualWorks v$VW_VERSION found in $VW_INSTALL_DIR!"
        exit 1
fi


VISUALWORKS="$VW_INSTALL_DIR/$VW_VERSION"


# setup GemStone
if [ -r /etc/gemstone/config ]
then
        GEMSTONE=/opt/gemstone
        . /etc/gemstone/config
        export GEMSTONE
elif [ -d "$GS_INSTALL_DIR" ]
then
        GEMSTONE="$GS_INSTALL_DIR"
        export GEMSTONE
fi


# setup the rest of environment
HOSTNAME=`hostname`

export VISUALWORKS
export HOSTNAME

cd `dirname "$IMAGE"`
IMAGE=`basename "$IMAGE"`

echo "VW_VERSION:  $VW_VERSION"
echo "VISUALWORKS: $VISUALWORKS"
echo "HOSTNAME:    $HOSTNAME"
echo "PWD:         $PWD"
echo "GEMSTONE:    $GEMSTONE"
echo "IMAGE:       $IMAGE"


# execute vw
cmd="$VISUALWORKS/bin/linux86/visual -h32m -=$IMAGE $args"
echo $cmd

exec $cmd