<project name="common">
	<property name="test.ant.file" location="${gwt.root}/${project.tail}/build.xml" />
	<condition property="project.valid">
		<equals arg1="${ant.file}" arg2="${test.ant.file}" />
	</condition>
	<fail unless="project.valid" message="This build file is in an inconsistent state." />

	<!-- Global Properties -->
	<property environment="env" />
	<property name="gwt.version" value="${env.GWT_VERSION}" />
	<property name="gwt.tools" location="${env.GWT_TOOLS}" />
	<property name="gwt.tools.lib" location="${gwt.tools}/lib" />
	<property name="gwt.tools.antlib" location="${gwt.tools}/antlib" />
	<property name="gwt.tools.redist" location="${gwt.tools}/redist" />
	<property name="gwt.build" location="${gwt.root}/build" />
	<property name="gwt.build.out" location="${gwt.build}/out" />
	<property name="gwt.build.lib" location="${gwt.build}/lib" />
	<property name="gwt.build.jni" location="${gwt.build}/jni" />
	<property name="gwt.build.staging" location="${gwt.build}/staging" />
	<property name="gwt.build.dist" location="${gwt.build}/dist" />
	<property name="project.build" location="${gwt.build.out}/${project.tail}" />
	<property name="project.lib" location="${gwt.build.lib}/gwt-${ant.project.name}.jar" />
	<property name="project.jni" location="${gwt.build}/${project.tail}" />
	<property name="unjar.out" location="${project.build}/unjar" />
	<property name="javac.out" location="${project.build}/bin" />
	<property name="javac.debug" value="true" />
	<property name="javac.debuglevel" value="lines,vars,source" />
	<property name="javac.source" value="1.4" />
	<property name="javac.nowarn" value="true" />

	<!-- Sanity check -->
	<available file="${gwt.tools}" type="dir" property="gwt.tools.exists" />
	<fail unless="gwt.tools.exists" message="Cannot find '${gwt.tools}' tools directory; perhaps you should define the GWT_TOOLS environment variable" />

	<!-- Global Custom Tasks -->
	<presetdef name="gwt.javac">
		<javac srcdir="src" destdir="${javac.out}" classpath="${unjar.out}" debug="${javac.debug}" debuglevel="${javac.debuglevel}" source="${javac.source}" nowarn="${javac.nowarn}" />
	</presetdef>

	<presetdef name="gwt.jar">
		<jar destfile="${project.lib}" update="true" duplicate="preserve" index="true" />
	</presetdef>

	<macrodef name="gwt.untar">
		<attribute name="src" />
		<attribute name="dest" />
		<sequential>
			<!-- GNU tar handles permissions and symlinks correctly -->
			<exec executable="tar" failonerror="true">
				<arg value="-xpzf" />
				<arg file="@{src}" />
				<arg value="-C" />
				<arg file="@{dest}" />
			</exec>
		</sequential>
	</macrodef>

	<target name="antcall.unjar.maybe" unless="unjar.upToDate">
		<mkdir dir="${unjar.out}" />
		<unjar src="${unjar.path}" dest="${unjar.out}" overwrite="true" />
		<touch file="${unjar.flagFile}" />
	</target>

	<target name="antcall.unjar">
		<basename property="unjar.name" file="${unjar.path}" />
		<property name="unjar.flagFile" value="${project.build}/${unjar.name}.unjar" />
		<uptodate property="unjar.upToDate" srcfile="${unjar.path}" targetfile="${unjar.flagFile}" />
		<antcall target="antcall.unjar.maybe" />
	</target>

	<macrodef name="gwt.unjar">
		<attribute name="toollib" default="" />
		<attribute name="path" default="${gwt.tools.lib}/@{toollib}" />
		<sequential>
			<antcall target="antcall.unjar">
				<param name="unjar.path" value="@{path}" />
			</antcall>
		</sequential>
	</macrodef>

	<macrodef name="property.ensure">
		<attribute name="name" />
		<attribute name="location" />
		<sequential>
			<property name="@{name}" location="@{location}" />
			<available file="${@{name}}" property="@{name}.exists" />
			<fail unless="@{name}.exists" message="Cannot find dependency ${@{name}}" />
		</sequential>
	</macrodef>

	<macrodef name="gwt.checkstyle">
		<element name="sourcepath" implicit="yes" optional="true"/>
		<sequential>
			<taskdef resource="checkstyletask.properties" classpath="${gwt.tools.antlib}/checkstyle-all-4.2.jar;${gwt.build.lib}/gwt-customchecks.jar" />
			<checkstyle config="${gwt.root}/eclipse/settings/code-style/gwtCheckStyle.xml" maxWarnings="0">
				<property key="checkstyle.header.file" file="${gwt.root}/eclipse/settings/code-style/google.header" />
				<sourcepath />
			</checkstyle>
		</sequential>
	</macrodef>

	<!-- Default implementations of the required targets; projects should
	override the ones that matter -->
	<target name="all" depends="verify" />
	<target name="verify" depends="checkstyle, test" description="Verify this project" />
	<target name="checkstyle" description="Static analysis of source" />
	<target name="test" depends="build" description="Test this project" />
	<target name="build" description="Build and (maybe) package this project" />

	<target name="clean" description="Cleans this project's intermediate and output files">
		<delete dir="${project.build}" />
	</target>

</project>