custom_rules.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="Opencaching4Locus-overrides">
	
	<target name="generate-build-info" depends="-pre-compile" />
	
	<target name="-pre-compile">
        <echo>Release preprocessing</echo>
        <xpath input="${manifest.abs.file}" expression="/manifest/@package"
                output="release.user.application.packageName" />
        <tstamp>
            <format property="release.user.timestamp" pattern="yyyy-MM-dd HH:mm" />
        </tstamp>
		<exec executable="git" failonerror="true">
		    <arg line="describe --dirty --tags" />
		    <redirector outputproperty="release.user.version" logerror="true" />
		</exec>
		<propertybyreplace name="release.user.application.packageDir" input="${release.user.application.packageName}" 
			replace="." with="/" />
		<property name="release.user.infoFile" value="${gen.absolute.dir}/${release.user.application.packageDir}/BuildInfo.java" />
		<echo append="false" file="${release.user.infoFile}">/**
</echo>
        <echo append="true" file="${release.user.infoFile}"> * Automatically generated file. DO NOT MODIFY
</echo>
        <echo append="true" file="${release.user.infoFile}"> * Call ant generate-build-info to regenerate this file
</echo>
	    <echo append="true" file="${release.user.infoFile}"> */
</echo>
		<echo append="true" file="${release.user.infoFile}">package ${release.user.application.packageName};
</echo>
		<echo append="true" file="${release.user.infoFile}">public class BuildInfo {
</echo>
		<echo append="true" file="${release.user.infoFile}">    public final static String TIMESTAMP="${release.user.timestamp}";
</echo>
	    <echo append="true" file="${release.user.infoFile}">    public final static String GIT_VERSION="${release.user.version}";
</echo>
		<echo append="true" file="${release.user.infoFile}">}
</echo>
	</target>
	
	<!-- 
	   Expected key releases.dir in local.properties
	-->
	
	<target name="-post-build" if="build.is.mode.release" 
		depends="-post-build-0,-print-git-local-modifications">
	</target>
	
    <target name="-post-build-0">
    	<echo>Release postprocessing</echo>
        <xpath input="${manifest.abs.file}" expression="/manifest/@android:versionCode"
                output="release.final.application.versionCode" />
        <xpath input="${manifest.abs.file}" expression="/manifest/@android:versionName"
                output="release.final.application.versionName" />
    	<tstamp>
    		<format property="release.final.timestamp" pattern="yyyyMMdd" />
    	</tstamp>
        <property name="release.final.dir" value="${releases.dir}${release.final.timestamp}" />        
        <mkdir dir="${release.final.dir}" />
    	<property name="release.final.dir.abs" location="${release.final.dir}" />
    	<property name="release.final.apk0" 
    		value="${release.final.dir.abs}/${ant.project.name}-${release.final.application.versionCode}" />
    	<condition property="release.final.beta" value="-beta" else="">
    		   <contains string="${release.final.application.versionName}" substring="beta"/>
    	</condition>
        <property name="release.final.apk" value="${release.final.apk0}${release.final.beta}.apk" />
        <property name="release.final.mappings" 
            value="${release.final.dir.abs}/mapping-${release.final.application.versionCode}.txt" />
    	<property name="release.final.version" 
            value="${release.final.dir.abs}/version-${release.final.application.versionCode}.txt" />
    	<move tofile="${release.final.apk}" file="${out.final.file}"/>
    	<copy
    		file="${out.absolute.dir}/proguard/mapping.txt"
    		tofile="${release.final.mappings}" />
    	<echo>Release APK saved to: ${release.final.apk}</echo>
    	
    	<echo>Saving git-info to: ${release.final.version}</echo>
    	<echo append="false" file="${release.final.version}" message="git-tag: " />
        <exec executable="git" failonerror="false">
        	<arg line="describe --tags HEAD" />
        	<redirector append="true" output="${release.final.version}" logerror="true" />
    	</exec>
    	<echo append="true" file="${release.final.version}" message="git-rev: " />
        <exec executable="git" failonerror="false">
            <arg line="rev-parse HEAD" />
            <redirector append="true" output="${release.final.version}" logerror="true" />
        </exec>

        <exec executable="git" failonerror="false">
            <arg line="status --porcelain" />
            <redirector outputproperty="release.final.git.localModifications" logerror="true" />
        </exec>

    	<condition property="release.final.git.localModifications.present">
    		<length string="${release.final.git.localModifications}" when="greater" length="2" trim="true" />
    	</condition>
    </target>
	<target name="-print-git-local-modifications" if="release.final.git.localModifications.present">
        <echo append="true" file="${release.final.version}" 
        	message="git-local-modifications: ${line.separator}${release.final.git.localModifications}" />
		<echo level="warning">*** Local Git modifications has been found!!!</echo>
	</target>
</project>