Manage JDK symlinks on OS X

symlink-java

#!/bin/bash -eu

# Example: sudo symlink-java jdk1.8.0_40.jdk jdk1.8.0_45.jdk

OLD_JDK=$1
NEW_JDK=$2

SYMLINK_DIR=/usr/bin
TARGET_DIR=/Library/Java/JavaVirtualMachines/$NEW_JDK/Contents/Home/bin

for file in $(ls -l $SYMLINK_DIR |grep "$OLD_JDK" |awk '{ print $9 }'); do
  if [ -n $file ]; then
    echo "Removing $SYMLINK_DIR/$file"
    rm $SYMLINK_DIR/$file
  fi
done

for file in $(ls $TARGET_DIR); do
  echo "Linking $SYMLINK_DIR/$file -> $TARGET_DIR/$file"
  ln -s $TARGET_DIR/$file $SYMLINK_DIR/$file
done