A downloader to get a portable OpenJDK (customized "tinyMediaManager" script included)

openjdk_portable_downloader.sh

#!/bin/bash

OVERWRITE_EXISTING=0
CLEANUP_DESTINATION=1
# relatibe path (from script location) to java storage path
DIR_DESTINATION="./java_portable"
SITE_OPENJDK="https://jdk.java.net/archive/"

# ----------------------- DO NOT EDIT BELOW THIS LINE -----------------------

# set internal vars
DIR_TEMP=$(mktemp -d)

ABSOLUTE_PATH="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
DIR_DESTINATION=$ABSOLUTE_PATH/$DIR_DESTINATION
echo "OpenJDK destination path  : $DIR_DESTINATION"

if [[ "$OSTYPE" == "linux-gnu" ]]; then
	PLATFORM="linux"
elif [[ "$OSTYPE" == "darwin"* ]]; then
	PLATFORM="osx"
elif [[ "$OSTYPE" == "cygwin" ]]; then
	PLATFORM="windows"
	echo "Platform not supported at the moment. Abort."
	exit 1
elif [[ "$OSTYPE" == "msys" ]]; then
	PLATFORM="windows"
	echo "Platform not supported at the moment. Abort."
	exit 1
elif [[ "$OSTYPE" == "win32" ]]; then
	Echo "Platform (32-bit) not supported. Abort."
	exit 1
elif [[ "$OSTYPE" == "freebsd"* ]]; then
	PLATFORM="linux"
else
	echo "Platform can not be detected. Abort."
	exit 1
fi


# get latest openjdk link
# get website content
DUMMY1=$(curl -s "$SITE_OPENJDK")
# get all links
DUMMY2=$(echo "$DUMMY1" | grep -Eo "(http|https)://[a-zA-Z0-9./?=_-]*(\.tar\.gz)")
# get first link auf all links of specified platform
DOWNLOAD=$(echo "$DUMMY2" | grep "$PLATFORM" | head -n 1)
# download openjdk
SITE_VERSION=$(echo "$DOWNLOAD" | sed -e 's#.*jdk-\(.*\)_.*#\1#' | sed -e 's#^\(.*\)_.*#\1#')

TEMPFILE="$DIR_TEMP/temp.openjdk-$PLATFORM-$SITE_VERSION.tar.gz"


# Cleaup obsolete versions
if [ $CLEANUP_DESTINATION -eq 1 ]; then
	echo "Clean up destination dir..."
	find "$DIR_DESTINATION/" -mindepth 1 -maxdepth 1 -not -name "openjdk-$PLATFORM-$SITE_VERSION" -print0 | xargs -0 rm -rf
fi

# check if platform/version already exists
if [[ -d "$DIR_DESTINATION/openjdk-$PLATFORM-$SITE_VERSION" ]]; then
    if [ $OVERWRITE_EXISTING -eq 0 ]; then
        echo "Version seems to exists in destination directory. Abort."
    	exit 1
    else
		echo "Overwritung existing version..."
	fi
fi

# downloading openjdk
echo "Downloading OpenJDK v.$SITE_VERSION / $PLATFORM. Please wait..."
curl -s -o "$TEMPFILE" "$DOWNLOAD"

# extract openjdk
tar -xf "$TEMPFILE" -C "$DIR_TEMP/" --strip=3
# get downloaded version
VERSION=$("$DIR_TEMP/Home/bin/java" --version | head -n 1 | awk '{ print $2 }')

# prepare destination directory
mkdir -p "$DIR_DESTINATION"
FINALDIR="$DIR_DESTINATION/openjdk-$PLATFORM-$SITE_VERSION"

echo "OS detected               : $PLATFORM"
echo "Temporary dir             : $DIR_TEMP"
#osascript -e "tell application \"System Events\" to display dialog \"DEBUG: $DIR_TEMP\""
echo "OpenJDK download link     : $DOWNLOAD"
echo "OpenJDK link version      : $SITE_VERSION"
echo "OpenJDK version           : $VERSION"
echo "OpenJDK destination path  : $DIR_DESTINATION"
echo "OpenJDK downloaded version: $FINALDIR"
echo "Please press CTRL+C to abort NOW! (waiting 5 seconds)"
sleep 5

echo "Remove old files and dirs..."
# remove old openjdk (if exists)
if [ ! -z "$FINALDIR" ]; then rm -rf "$FINALDIR/"; fi
# copy downloaded openjdk to destination
cp -Rp "$DIR_TEMP/Home" "$FINALDIR"
# copy downloaded tar to destination (as backup; will be deleted at next activated cleanup!)
#cp $TEMPFILE $DIR_DESTINATION/

# remove downloaded/extracted temp parts
if [ ! -z "$DIR_TEMP" ]; then rm -rf "$DIR_TEMP/"; fi
if [ -f "$TEMPFILE" ]; then rm -rf "$TEMPFILE"; fi

echo "Done."

tinyMediaManagerOSX.sh

#!/bin/sh
#####################################################################################
# This is a "kickstarter" for OSX; we need to do some logic here, because in OSX
# there is no way to provide an updater and the app itself inside one app.
# There is exactly one "entry point" per .app which is defined in the info.plist.
# In our case this is JavaApplicationStub which is a simple shellscript that launches
# this shellscript. Here we do differend checks
#
# a) search the right Java JVM
# b) decide whether we need to launch the updater or launch tmm
#
#####################################################################################

# find the path where to execute tmm
PRG=$0
while [ -h "$PRG" ]; do
    ls=`ls -ld "$PRG"`
    link=`expr "$ls" : '^.*-> \(.*\)$' 2>/dev/null`
    if expr "$link" : '^/' 2> /dev/null >/dev/null; then
        PRG="$link"
    else
        PRG="`dirname "$PRG"`/$link"
    fi
done

progdir=`dirname "$PRG"`

# check if tmm has been executed in a read only environment
if [ ! -w "$progdir" ]; then
  osascript -e "tell application \"System Events\" to display dialog \"ERROR launching tinyMediaManager!

You need to execute tinyMediaManager from a writeable location (e.g. the Applications folder)\" with title \"tinyMediaManager\" buttons {\" OK \"} default button 1 with icon path to resource \"tmm.icns\" in bundle (path to me)"
  exit 1
fi

# By default Mac OS X LC_ALL is set to "C", which means files with special characters will not be found.
export LC_ALL="en_US.UTF-8"

# --- rfuehrer: start ---
ABSOLUTE_PATH="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
"$ABSOLUTE_PATH/openjdk_portable_downloader.sh"
JAVACMD=$(find "$ABSOLUTE_PATH" -type f -name "java" -perm +0111 -print | head -n 1)

# # search for the right JVM - priority is java 8
# if [ -x /usr/libexec/java_home ]; then
#   JAVA_HOME="`/usr/libexec/java_home -v 1.8 -F`"
#   export JAVA_HOME
# fi

# if [ ! -f "$JAVA_HOME/bin/java" -a -x "/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java" ]; then
#   JAVA_HOME="/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home"
#   export JAVA_HOME
# fi
# JAVACMD="${JAVA_HOME}/bin/java"

#if [ ! -f "$JAVACMD" -o ! -x "$JAVACMD" ]; then
#  # display error message with applescript
#  osascript -e "tell application \"System Events\" to display dialog \"ERROR launching tinyMediaManager!

##You need to have JAVA installed on your Mac!
##Visit http://java.com for more information...\" with title \"tinyMediaManager\" buttons {\" OK \"} default button 1 with icon path to resource \"tmm.icns\" in bundle (path to me)"
#  
#  # and open java.com
#  open http://java.com
#  
#  # exit with error
#  exit 1
#fi
# --- rfuehrer: end ---

# have a look if we need to launch the updater or tmm directly
if [ -f tmm.jar ]; then
  ARGS="-Dsilent=noupdate"
else
  ARGS="-Xdock:name=`tinyMediaManager updater`"
  ARGS="$ARGS -Xdock:icon=../tmm.icns"
fi

ARGS="$ARGS -Djava.net.preferIPv4Stack=true -Dappbase=http://www.tinymediamanager.org/"

# execute it :)
# --- rfuehrer: start ---
exec "$JAVACMD" ${ARGS} -jar getdown.jar .
# --- rfuehrer: end ---