Installer script for JDKs

java_installer.sh

#!/bin/bash

JDK_FILE="jdk-8u20-linux-x64.tar.gz"
JDK_URL="https://s3.amazonaws.com/com.brightcove.rna.repo.dev/${JDK_FILE}"
JDK_ARCHIVE="${HOME}/${JDK_FILE}"
JDKS_DIR="${HOME}/jdks"
JDK_DIR="${JDKS_DIR}/jdk1.8.0_20"

# ensure jdks directory exists
mkdir -p $JDKS_DIR

if [ ! -f "${JDK_ARCHIVE}" ]; then
  echo "Downloading ${JDK_FILE}"
  wget --nv -O ${JDK_ARCHIVE} --no-cookies --no-check-certificate ${JDK_URL}
fi
if [ ! -d "${JDK_DIR}" ]; then
  echo "Extracting ${JDK_FILE} to ${JDK_DIR}"
  tar -zxf ${JDK_ARCHIVE} -C /${JDKS_DIR}
fi
if [ "$JAVA_HOME" != "$JDK_DIR" ]; then
  echo "Setting JAVA_HOME to ${JDK_DIR}"
  export JAVA_HOME="${JDK_DIR}"
  echo "Adding ${JAVA_HOME}/bin to PATH"
  export PATH="${JAVA_HOME}/bin:${PATH}"
fi