bin/update_java at master · Tailszefox/bin · GitHub

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#!/bin/bash

# Update the Java browser plugin

mkdir -p /tmp/java_plugin_install

cd /tmp/java_plugin_install

downloadPage=`curl -s -L http://www.oracle.com/technetwork/java/javase/downloads/index.html | grep -E --only-matching "/technetwork/java/javase/downloads/jdk8-downloads-([0-9]*).html" | head -1`

echo "Download page is http://www.oracle.com$downloadPage"

fileUrl=`curl -s -L "http://www.oracle.com$downloadPage" | grep -E --only-matching "http://download.oracle.com/otn-pub/java/jdk/8u(\w+)-(\w+)/([0-9a-f]+)/jdk-8u(\w+)-linux-x64.tar.gz" | head -1`

regexVersion="8u([0-9]+)"
[[ $fileUrl =~ $regexVersion ]]
availableVersion="${BASH_REMATCH[1]}"

javaVersion=`java -version 2>&1 | grep version`
regexCurrentVersion="_([0-9]+)"
[[ $javaVersion =~ $regexCurrentVersion ]]
currentVersion="${BASH_REMATCH[1]}"

echo "Current version: $currentVersion"
echo "Available version: $availableVersion"

if [[ $currentVersion -eq $availableVersion ]]; then
    echo "No update needed"
    exit
fi

echo "Ready to download $fileUrl..."

wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" $fileUrl

echo "Making deb..."
make-jpkg jdk-8u*-linux-x64.tar.gz

echo "Installing deb..."
sudo dpkg -i oracle-java8-jdk_8u*_amd64.deb

echo "Done, cleaning up"
rm jdk-8u*-linux-x64.tar.gz oracle-java8-jdk_8u*_amd64.deb