git ant tasks

build.xml

<?xml version="1.0" encoding="UTF-8"?>
<project>

    <!-- Copied almost verbatim from: http://stackoverflow.com/questions/2974106/how-to-lookup-the-latest-git-commit-hash-from-an-ant-build-scripto-->

    <available file=".git" type="dir" property="git.present"/>

    <target name="git.revision" description="Store git revision in ${repository.version}" if="git.present">
        <exec executable="git" outputproperty="git.revision" failifexecutionfails="false" errorproperty="">
            <arg value="describe"/>
            <arg value="--tags"/>
            <arg value="--always"/>
            <arg value="HEAD"/>
        </exec>
        <condition property="repository.version" value="${git.revision}" else="unknown">
            <and>
                <isset property="git.revision"/>
                <length string="${git.revision}" trim="yes" length="0" when="greater"/>
            </and>
        </condition>
    </target>
    
    <target name="replace-tokens">
        <copy file="index.html.template" tofile="index.html" overwrite="yes">
            <filterchain>
                <replacetokens>
                    <token key="repository.version" value="${repository.version}" />
                </replacetokens>
            </filterchain>
        </copy>
    </target>
</project>