auto switches symlinks to your grails project

.auto_grails_switch.sh

#!/bin/bash

# This is ~/.auto_grails_switch, and it switches your grails runtime.

# 1. add this file to the bottom of ~/.bashrc
# source ~/.auto_grails_switch.sh

# 2. Make sure .auto_grails_switch is run every time you change dir. add \$(auto_grails_switch) to PS1
# PS1='debian_chroot:+($debian_chroot)}\$(auto_grails_switch)\$ ' 

# 3. make a grails symlink for the first time.
# ln -sf /opt/grails-2.0.0 /opt/grails

# 4. Update the GRAILS_INSTALLATIONS variable.

# 5. restart your shell and you're done.

GRAILS_INSTALLATIONS=/opt

function switch_grails {
         if [ "$(stat -c %N $GRAILS_INSTALLATIONS/grails | cut -d '>' -f2 | tr -d ' ' )" != "$(stat -c %N $GRAILS_INSTALLATIONS/grails-$1)" ]
         then
	         #echo 'setting'
                 rm -f $GRAILS_INSTALLATIONS/grails
		 ln -sf $GRAILS_INSTALLATIONS/grails-$1 $GRAILS_INSTALLATIONS/grails
	 fi
}

function auto_grails_switch {
   if [ -e "application.properties" ] 
   then
       GRAILS_TARGET_VERSION=$(grep "app.grails.version" application.properties | cut -d"=" -f2)
       if [ $GRAILS_TARGET_VERSION ]
       then
	   switch_grails $GRAILS_TARGET_VERSION
       fi
   fi
}