build-helper.xml

<project name="build-helper" default="">
	
	<property name="downloadsDir" value="/tmp"/>

	<macrodef name="extract-version">
		<attribute name="property"/>
		<attribute name="file"/>
		<sequential>
			<loadfile property="@{property}" srcFile="@{file}">
				<filterchain>
					<linecontains>
						<contains value="Bundle-Version: "/>
					</linecontains>
					<striplinebreaks/>
					<tokenfilter>
					      <filetokenizer/>
					      <replaceregex pattern="Bundle-Version: ([0-9A-Z.]*)"
					                    flags="s"
					                    replace="\1"/>
					</tokenfilter>
				</filterchain>
			</loadfile>
		</sequential>
	</macrodef>

	<macrodef name="extract-symbolic-name">
		<attribute name="property"/>
		<attribute name="file"/>
		<sequential>
			<loadfile property="@{property}" srcFile="@{file}">
				<filterchain>
					<linecontains>
						<contains value="Bundle-SymbolicName: "/>
					</linecontains>
					<striplinebreaks/>
					<tokenfilter>
					      <filetokenizer/>
					      <replaceregex pattern="Bundle-SymbolicName: ([0-9A-Z.]*)"
					                    flags="s"
					                    replace="\1"/>
					</tokenfilter>
				</filterchain>
			</loadfile>
		</sequential>
	</macrodef>
	
	<target name="getContent">
		<basename property="file" file="${url}"/>
		<antcall target="getBundle">
			<param name="file" value="${file}" />
			<param name="url" value="${url}"/>
		</antcall>
		<antcall target="unpackBundle">
			<param name="file" value="${file}" />
			<param name="unpackDest" value="${dest}"/>
			<param name="isUnpackedFile" value="${dest}/.extracted"/>
		</antcall>
	</target>
		
	<target name="getBundle">
		<!-- <echo message="getDependenciesHelper.xml: basedir = ${basedir}"/> -->
		<!-- requires the following params to be set -->
		<!--
			<property name="url"/> [url to download and unpack, eg., https://.../.../foo.zip]
			<property name="file"/> [filename of the url to download and unpack, eg., foo.zip]
    	-->
		<!-- get the zip or tar.gz from the remote server if it's not already been downloaded -->
		<available file="${downloadsDir}/${file}" property="theZipExists"/>
		<antcall target="downloadFile">
			<param name="theFile" value="${file}"/>
			<param name="theURL" value="${url}"/>
		</antcall>
	</target>
	<target name="unpackBundle">
		<!-- requires the following params to be set -->
		<!--
			<property name="file"/> [filename of the url to download and unpack, eg., foo.zip]
    		<property name="unpackDest"/> [path where to unpack, eg., ${buildDirectory}/.. or .]
    		<property name="isUnpackedFile"/> [filename and path for which if it exists we can assume that the unpack has already occurred, eg., ./plugins/org.eclipse.foo/plugin.xml]
    	-->
		<sequential>
			<!-- check if we've done this already -->
			<available property="isUnpacked" file="${isUnpackedFile}"/>

    		<!-- check the bundle type and unpack it accordingly -->
			<condition property="isAZip"><contains string="${file}" substring=".zip" /></condition>
			<condition property="isATar"><contains string="${file}" substring=".tar.gz" /></condition>
			<antcall target="unzipFile"><param name="theFile" value="${downloadsDir}/${file}"/><param name="theDir" value="${unpackDest}"/></antcall>
			<antcall target="untarFile"><param name="theFile" value="${downloadsDir}/${file}"/><param name="theDir" value="${unpackDest}"/></antcall>

			<!-- reset these properties for the next loop -->
			<condition property="isAZip"><contains string="a" substring="z"/></condition>
			<condition property="isATar"><contains string="a" substring="z"/></condition>
			<condition property="isUnpacked"><contains string="a" substring="z"/></condition>
		</sequential>
	</target>


	<!-- helper methods -->
	<target name="downloadFile" unless="theZipExists"><get src="${theURL}" dest="${downloadsDir}/${theFile}" usetimestamp="true"/><touch file="${downloadsDir}/${theFile}"/></target>
	<target name="unzipFile" unless="isUnpacked" if="isAZip"><unzip src="${theFile}" dest="${theDir}" overwrite="true" /></target>
	<target name="untarFile" unless="isUnpacked" if="isATar"><untar src="${theFile}" dest="${theDir}" overwrite="true" compression="gzip"/></target>
	<target name="unpackJar" unless="isUnpacked" if="jarExists"><unjar src="${theJar}" dest="${theDir}" overwrite="true"/></target>
</project>