bash script to switch the symlink that PATH and JAVA_HOME use for the JDK currently in use

gistfile1.txt

if [[ -d /opt/build/resources/jdk ]]; then
	servertype="build"
else
	servertype="code"
fi
jdkpath=/opt/$servertype/resources/jdk/jdk
export PATH=$jdkpath/bin:$PATH
export JAVA_HOME=$jdkpath

setjdk.sh

#!/bin/bash

if [[ -d /opt/build/resources/jdk ]]; then
	servertype="build"
else
	servertype="code"
fi

jdks=/opt/$servertype/resources/jdk

if [[ ! -d /opt/$servertype/resources/jdk ]]; then
	echo "no JDKs found"
	exit 1
fi

if [[ -L $jdks/jdk ]]; then
	current=$(file $jdks/jdk | sed "s/\`/\'/" | cut -f2 -d\' | sed 's/jdk//')
	if [[ "$current" == "latest" ]]; then
		currentptr=$(file $jdks/jdk | sed "s/\`/\'/" | cut -f2 -d\' | sed 's/jdk//')
		current=$(file $jdks/latest | sed "s/\`/\'/" | cut -f2 -d\' | sed 's/jdk//')
	fi
fi

if [[ -L $jdks/latest ]]; then
	latest=$(file $jdks/latest | sed "s/\`/\'/" | cut -f2 -d\' | sed 's/jdk//')
fi

versions=$(find $jdks -type d "jdk[1-9]" | xargs | sed 's/jdk//g')

count=0
for version in $versions; do
	((count++))
	promptstring="$count) $version"
	if [[ $version == $current ]]; then
		currentnum=$count
		promptstring="$promptstring (active)"
	fi
	if [[ $version == $latest ]]; then
		latestnum=$count
		promptstring="$promptstring (latest)"
	fi
	echo $promptstring
	versionsarray[$count]="$version"
done

until [[ $choice -ge 1 && $choice -le $count ]]; do
	read -p "Choose a JDK version [1-$count]: " choice
done
jdk=${versionsarray[$choice]}

if [[ "${versionsarray[$latestnum]}" == "$jdk" ]]; then
	jdkname=latest
else
	jdkname=jdk$jdk
fi

if [[ $current == $jdk ]]; then
	echo "JDK already set to $current"
	exit
fi

cd $jdks 
rm jdk && ln -s $jdkname jdk