ANT Build File for numbering versions

build.xml

<?xml version="1.0" encoding="UTF-8"?> 
<project name="Numbers" default="dist" basedir=".">      
    <property name="version.file" location="${basedir}/build.properties"/>      
    <target name="inc.revision.properties" unless="no.increment.revision">         
        <propertyfile file="${version.file}">             
            <entry key="minor.number" default="0" operation="=" type="int"/>             
            <entry key="major.number" default="1" operation="="  type="int"/>             
            <entry key="build.number" default="0" operation="+"  type="int"/>         
        </propertyfile>     
    </target>      
    <target name="inc.minor.properties" unless="no.increment.minor">         
        <propertyfile file="${version.file}">             
            <entry key="minor.number" default="0" operation="+" type="int"/>             
            <entry key="major.number" default="1" operation="=" type="int"/>             
            <entry key="build.number" value="0" operation="="  type="int"/>         
        </propertyfile>     
    </target>      
    <target name="inc.major" if="inc.major">         
        <property name="no.increment.minor" value="true" />         
        <property name="no.increment.revision" value="true" />         
        <propertyfile file="${version.file}">             
            <entry key="minor.number" value="0" operation="=" type="int"/>             
            <entry key="major.number" default="1" operation="+" type="int"/>             
            <entry key="build.number" value="0" operation="=" type="int"/>  
        </propertyfile>         
        <load.version.info/>     
    </target>      
    <target name="inc.minor" depends="inc.major,inc.minor.properties">         
        <property name="no.increment.revision" value="true"/>         
        <load.version.info/>     
    </target>      
    <target name="inc.revision" depends="inc.major,inc.revision.properties">         
        <load.version.info/>     
    </target>      
    <macrodef name="load.version.info">         
        <sequential>   
            <tstamp>
                <format property="operation.date" pattern="dd-MMM-yyyy HH:mm:ss"/>
            </tstamp>
            <property file="${version.file}"/>             
            <checksum file="${version.file}" property="sha1.number" algorithm="SHA" format="CHECKSUM"/>             
            <echo>Version: ${major.number}.${minor.number}.${build.number}</echo>             
            <echo>SHA1: ${sha1.number}</echo>   
            <propertyfile file="${version.file}">             
                <entry key="migration.release.version" value="${major.number}.${minor.number}.${build.number}-alpha"/>  
            </propertyfile>
            <echo file="../routing-version.json" append="false"  
            message="{&quot;version&quot;: &quot;${major.number}.${minor.number}.${build.number}-alpha&quot;,  &quot;release&quot;: &quot;${migration.release.name}&quot;,  &quot;release-date&quot;: &quot;${operation.date}&quot;}">
            </echo>
        </sequential>     
    </macrodef>      
    <target name="compile" depends="inc.revision" description="Compile Task"/>      
    <target name="dist" depends="inc.minor, compile" description="Dest Task"/>  
</project>