ant script to assemble an extension

This ant script helps to package an extension

<?xml version="1.0"?>
This build file was written by Régis Décamps <decamps@users.sf.net>

<project name="blogmark" default="createxpi">
       <property name="VERSION" value="1.3-rc1"/>
       <property name="DESCRIPTION" value="New context-menu item to add
                                           the current page in your Blogmarks"/>
       XPI file is created after "chrome/blogmark.jar"               is created, which is then stuffed into "blogmark.xpi"
       <target name="createxpi" depends="createjar"
               description="Assemble the final build blogmark.xpi">
               <zip destfile="blogmark-${VERSION}.xpi">
                        <zipfileset dir="." includes="chrome/blogmark.jar" />
                        <zipfileset dir="." includes="install.rdf" />
                </zip>
        </target>

       Everything inside the chrome directory is zipped into chrome/blogmark.jar
       <target name="createjar" depends="templates" description="Assemble the jar">
                <jar destfile="chrome/blogmark.jar">
                       <fileset dir="chrome/">
                               <include name="**/*"/>
                               <exclude name="**/*~"/>
                               <exclude name="**/*.tpl.*"/>
                               <exclude name="blogmark.jar"/>
                       </fileset>
                </jar>
        </target>

       <target name="templates" description="Generate files from templates.">
               <copy file="chrome/content/blogmark/contents.rdf.tpl.xml"
                     tofile="chrome/content/blogmark/contents.rdf"
                     overwrite="true">
                       <filterchain>
                               <replacetokens>
                                       <token key="VERSION" value="${VERSION}"/>
                                       <token key="DESCRIPTION" value="${DESCRIPTION}"/>
                               </replacetokens>
                       </filterchain>
               </copy>
               <copy file="chrome/content/blogmark/about.xul.tpl.xml"
                       tofile="chrome/content/blogmark/about.xul"
                       overwrite="true">
                       <filterchain>
                               <replacetokens>
                                       <token key="VERSION" value="${VERSION}"/>
                               </replacetokens>
                       </filterchain>
               </copy>
               <copy file="install.rdf.tpl.xml"
                       tofile="install.rdf"
                       overwrite="true">
                       <filterchain>
                               <replacetokens>
                                       <token key="VERSION" value="${VERSION}"/>
                                       <token key="DESCRIPTION" value="${DESCRIPTION}"/>
                               </replacetokens>
                       </filterchain>
               </copy>
       </target>
</project>