build.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="freenet-autodep" default="all" basedir=".">
	<description>
Freenet is free software that lets you publish and retrieve information without
fear of censorship. To achieve this, the network is entirely decentralized, and
all actions are anonymous. Without anonymity, there can never be true freedom
of speech, and without decentralization the network would be vulnerable to attack.

This file is to build Freenet with minimal effort. It will check for Freenet's
dependencies and requirements, and will try to satisfy these if they are not
available (possibly using *pre-built blobs*). This requires the optional ANT
tasks (ant-apache-bsf) and (if using Java &lt;6) bsf and rhino.
	</description>

	<import file="build-clean.xml"/>

	<!-- =================================================================== -->
	<!-- Dependencies (contrib, ie. freenet-ext.jar)                         -->
	<!-- =================================================================== -->

	<target name="dep-ext" description="try to ensure that Freenet-related dependencies are available">
		<trydep property="contrib.present">
			<condition><available classname="freenet.node.ExtVersion" classpathref="lib.path"/></condition>
			<tasks>
				<antcall target="build-ext"/>
				<antcall target="get-ext"/>
			</tasks>
			<fail message="could neither build nor download freenet-ext.jar"/>
		</trydep>
	</target>

	<target name="get-ext">
		<get src="http://checksums.freenetproject.org/cc/freenet-ext.jar" dest="${lib}/freenet-ext.jar"
			verbose="true" usetimestamp="true"/>
	</target>

	<target name="build-ext" depends="suppress-ext" unless="${suppress.ext}">
		<ant inheritAll="false" antfile="${contrib.dir}/build.xml" />
	</target>

	<target name="clean-ext" depends="suppress-ext" unless="${suppress.ext}">
		<ant inheritAll="false" antfile="${contrib.dir}/build.xml" target="clean"/>
	</target>

	<target name="suppress-ext" if="${suppress.ext}">
		<echo message="suppress.ext is set to true, so clean-ext and build-ext will skip" />
	</target>

	<!-- =================================================================== -->
	<!-- Generate GWT code                                                   -->
	<!-- =================================================================== -->

	<target name="dep-gjs" description="try to ensure that the GWT-generated javascript is available">
		<trydep property="gjs.present">
			<condition><available file="${gjs.dst}" type="dir"/></condition>
			<tasks>
				<antcall target="build-gjs"/>
				<antcall target="checkout-gjs"/>
			</tasks>
			<fail message="could neither build nor checkout generated javascript"/>
		</trydep>
	</target>

	<target name="checkout-gjs" depends="clean-gjs" description="checkout pre-generated javascript from VCS">
		<exec executable="git">
			<arg value="checkout" />
			<arg value="${gjs.dst}" />
		</exec>
	</target>

	<!-- =================================================================== -->
	<!-- Helper tasks                                                        -->
	<!-- =================================================================== -->

	<scriptdef name="trydep" language="javascript">
		<!-- property to test for to see if the dependency has been satisfied -->
		<attribute name="property"/>
		<!-- "condition" task to maybe set the above property -->
		<element name="condition" type="condition"/>
		<!-- tasks to run, one by one, until the property is set -->
		<element name="tasks" classname="org.apache.tools.ant.Target"/>
		<!-- optional "fail" task to run, if none of the tasks succeeded -->
		<element name="fail" type="fail"/>
		<!-- optional name of dependency, used in the default fail message -->
		<attribute name="name"/>
		<![CDATA[
			var prop = attributes.get("property")
			var cond = elements.get("condition").get(0)
			if (!prop) { self.fail("trydep: property attribute not given"); }
			cond.getProxy().setProperty(prop)

			function condition() {
				cond.execute()
				return project.getProperty(prop)
			}

			var taskel = elements.get("tasks")
			var tasks = taskel? taskel.get(0).getTasks(): []

			var name = attributes.get("name")
			var desc = name? "dependency " + name: "property " + prop
			var failel = elements.get("fail")
			var failtask = failel? failel.get(0): null

			function trydep() {
				if (condition()) { return; }
				for (var i=0; i<tasks.length; ++i) {
					task = tasks[i]
					task.maybeConfigure()
					self.log("trying to satisfy " + desc + "...")
					try {
						task.execute()
					} catch (e) {
						if (!(e.javaException instanceof org.apache.tools.ant.BuildException)) { throw e; }
						self.log("task failed: " + e.javaException)
					}

					if (condition()) { return; }
				}

				if (failtask) {
					failtask.execute();
				} else {
					self.fail("could not satisfy " + desc);
				}
			}

			trydep()
		]]>
	</scriptdef>

</project>