Switch Grail's Versions using Symlinks.

grails-version.sh

#!/bin/sh
 
##
## Switches grails versions by changing the the symlink ~/grails to a
## ~/grails-$VERSION
##
## Author: Dan Lynn ([email protected])
## Modified: Mike Kusold ([email protected])
 
if [ -z "$1" ]; then
    cat <<End-of-message
Usage:
    $0 [version]
 
The version argument must be a valid grails installation and comes in the standard grails versioning scheme.
 
Examples:
    $0 1.3.7
    $0 1.1.1
 
End-of-message
 
    exit 1
fi
 
DIRNAME="/usr/share/grails"
NEW_GRAILS_HOME="$DIRNAME/$1"
 
if [ ! -d $NEW_GRAILS_HOME ]; then
    echo "$NEW_GRAILS_HOME doesn't exist!" >&2
    exit 1
fi
 
rm "/usr/bin/grails"
rm "/usr/bin/grails-debug"
rm "/usr/bin/startGrails"
rm -r "/usr/share/grails/current"

ln -s $NEW_GRAILS_HOME/bin/grails "/usr/bin/grails"
ln -s $NEW_GRAILS_HOME/bin/grails-debug "/usr/bin/grails-debug"
ln -s $NEW_GRAILS_HOME/bin/startGrails "/usr/bin/startGrails"
ln -s $NEW_GRAILS_HOME "/usr/share/grails/current"