OSX sbt launcher. Download sbt-launch.jar, put this script next to it, and create a symbolic link to this script on your path.

sbt

CWD=`pwd`

SELF=$0

cd `dirname $SELF`
SELF=`basename $SELF`

# Iterate down a (possible) chain of symlinks
while [ -L "$SELF" ]
do
    SELF=`readlink $SELF`
    cd `dirname $SELF`
    SELF=`basename $SELF`
done

# Compute the canonicalized name by finding the physical path 
# for the directory we're in and appending the target file.
PHYS_DIR=`pwd -P`
LAUNCH="$PHYS_DIR"/sbt-launch.jar

cd $CWD

SBT_OPTS="-Xms512M -Xmx1536M -Xss1M -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=256M"
java $SBT_OPTS -jar "$LAUNCH" "$@"