In Eclipse tutti i vari progetti comunicano attraverso una reference: per Ant come dovrei fare?
Non conosco Eclipse, normalmente uso Netbeans. Netbeans ha la possibilita' di mettere nel proprio progetto un riferimento ad un altro progetto, ed immagino che sia la stessa cosa per Eclipse, e che i reference non siano altro che i .jar ottenuti compilando i progetti referenziati.
Se cosi' fosse, potresti risolvere la cosa creando un nuovo nodo in build.xml che va a copiare i .jar che ti interessano, e che poi devi mettere nel tuo path.
Ora sono al lavoro, posso dedicarti solo pochi minuti.
Ti metto qui un file ant che ho scritto per fare la stessa cosa su un mio progetto, spero ti possa servire per riferimento. Potrai notare che vado ad aggiungere le librerie jar al path, copiare i file, creare il .jar finale:
<project name="ConfTag" default="dist" basedir=".">
<description>
LogTools - Tag configuration application
</description>
<property name="radix" location="." />
<property name="distPath" value="com/sottovento/conftag" />
<property name="package" value="conftag" />
<property name="src" location="${radix}/source/${distPath}" />
<property name="build" location="${radix}/build/${distPath}" />
<property name="dist" location="${radix}/package_out" />
<property name="lib" location="${radix}/lib" />
<property name="docs" location="${radix}/docs" />
<property name="chk" location="${radix}/chk/${distPath}" />
<property name="conffiles" location="${radix}/config/confTag" />
<!-- Preparing classpath to reach JCLASS libraries, remote spy libraries and Application libraries -->
<path id="project.class.path">
<pathelement path="${src}" />
<fileset dir="${lib}">
<include name="**/*.jar" />
</fileset>
</path>
<!-- First target, initialising -->
<target name="init">
<!-- Create the time stamp -->
<tstamp/>
<!-- Create the directory structure used by compile -->
<delete dir="${radix}/build" />
<mkdir dir="${build}" />
</target>
<!-- Compiling targets -->
<target name="compile" depends="init" description="Compile all the sources" >
<!-- Compile the java code from ${src} into ${build} -->
<javac srcdir="${src}" destdir="${radix}/build">
<classpath refid="project.class.path" />
</javac>
</target>
<!-- Copying the config files in distribution directory. Additional files are required for setup, configuration, ... -->
<target name="copy" description="Copy configuration files into distribution directory" >
<mkdir dir="${dist}/${package}/config" />
<sync todir="${dist}/${package}" >
<fileset dir="${conffiles}" />
</sync>
</target>
<!-- Copy the libraries to distribution directory -->
<target name="copylib" description="Copy the needed libraries into distribution directory" >
<sync todir="${dist}/lib" >
<fileset dir="${lib}" />
</sync>
</target>
<!-- Preparing manifest file -->
<target name="manifest" depends="compile" description="Prepare manifest file" >
<mkdir dir="${build}/META-INF" />
<manifest file="${build}/META-INF/MANIFEST.MF">
<attribute name="Built-By" value="sottovento" />
<attribute name="Company" value="xxxxxxxxxx AG EAI2 Office"/>
<attribute name="Content" value="Tag configuration application"/>
<attribute name="Main-Class" value="com.sottovento.conftag.ConfTag" />
<attribute name="Class-Path" value=" ../lib/liquidlnf.jar" />
</manifest>
</target>
<!-- Preparing distribution -->
<target name="dist" depends="compile, copy, manifest, copylib" description="Code distribution preparation" >
<!-- Create distribution directory -->
<mkdir dir="${dist}/${package}" />
<!-- Put everything in ${build} into the level2.jar file -->
<jar destfile="${dist}/${package}/conftag.jar"
basedir="${radix}/build" manifest="${build}/META-INF/MANIFEST.MF" >
<include name="**" />
<exclude name="META-INF/**" />
<exclude name="/build.xml" />
</jar>
<!--
<sync todir="${dist}/${package}/lib" >
<fileset dir="${dist}/lib" />
</sync>
-->
</target>
<!-- Target for cleanup build directories -->
<target name="clean" description="Clean up" >
<!-- Delete the ${build} and ${dist} directory trees -->
<delete dir="${build}" />
<delete dir="${dist}/${package}" />
<delete dir="${build}/META-INF" />
</target>
<!-- Target for javadoc generation -->
<target name="doc" description="Generate Javadoc documentation" >
<mkdir dir="${docs}/${distPath}" />
<javadoc packagenames="com.sottovento.conftag.*"
sourcepath="${src}"
classpathref="project.class.path"
destdir="${docs}/${distPath}"
author="true"
version="true"
use="true"
private="true"
windowtitle="Conftag API documentation" />
</target>
</project>