findjvmtest.xml

<project name="findjvmtest" default="findjvm.jdk8">
	<target name="-findjvms.base">
		<property file="jvms.properties" />
		<available property="tools.exec.javahome" value="/usr/libexec/java_home" file="/usr/libexec/java_home" />
		<condition property="tools.exec.reg" value="reg.exe">
			<os family="windows" />
		</condition>
	</target>
	
	<target name="-findjvm.jdk8.mac" unless="jvm.8.loc" if="tools.exec.javahome">
		<exec outputproperty="jvm.8.loc.tmp" resultproperty="jvm.8.loc.res" failifexecutionfails="false" executable="${tools.exec.javahome}">
			<arg value="-v" />
			<arg value="1.8" />
		</exec>
		<condition property="jvm.8.loc" value="${jvm.8.loc.tmp}">
			<equals arg1="${jvm.8.loc.res}" arg2="0" />
		</condition>
	</target>
	
	<target name="-findjvm.jdk8.win" depends="-findjvms.base" unless="jvm.8.loc" if="tools.exec.reg">
		<exec outputproperty="jvm.8.loc.tmp" resultproperty="jvm.8.loc.res" failifexecutionfails="false" executable="${tools.exec.reg}">
			<arg value="query" />
			<arg value="HKLM\\Software\\JavaSoft\\Java Runtime Environment\\1.8" />
			<arg value="/v" />
			<arg value="JavaHome" />
			<arg value="/e" />
		</exec>
		
		<condition property="jvm.8.loc" value="${jvm.8.loc.tmp}">
			<equals arg1="${jvm.8.loc.res}" arg2="0" />
		</condition>
	</target>
	
	<target name="-findjvm.jdk8.manual" depends="-findjvms.base" unless="jvm.8.loc">
		<input message="Cannot find the location to a JDK/JRE8 installation; enter the full path to the dir so that resolving 'bin/java' relative to it works, and runs java 1.8. Don't have one? Press enter." addproperty="jvm.8.loc" />
		<echoproperties destfile="jvms.properties" regex="jvm\.\d+\.loc" />
	</target>
	
	<target name="findjvm.jdk8" depends="-findjvms.base, -findjvm.jdk8.mac, -findjvm.jdk8.win, -findjvm.jdk8.manual">
		<echo>Using ${jvm.8.loc}/bin/java for running 1.8 tests</echo>
	</target>
</project>