There isn't antlib.xml in my ant-contrib-0.3

问题:

I am trying to use task for. I tried with this task definition:

    <taskdef resource="net/sf/antcontrib/antlib.xml">
        <classpath>
            <pathelement location="${infrastructure-base-dir}/apache-ant-1.9.6/lib/ant-contrib-0.3.jar"/>
        </classpath>
    </taskdef>

But didn't work. This message appear:

Problem: failed to create task or type for

So I decider to unzip ant-contrib-0.3.jar to see what's inside. And there wasn't antlib.xml in this path: net/sf/antcontrib/. So what would you advise me in order to make task FOR to work?

回答1:

Try this:

1. In your build.xml

   <taskdef name="for-contrib" classname="net.sf.antcontrib.logic.ForTask" classpath="${basedir}/lib/ant-contrib-1.0b3.jar" />

2. Place jar file file in correct location, i.e. in lib folder at same level as build.xml.

3. Use the for as needed, i.e

   <for-contrib list="a,b,c,d,e" param="letter"> <sequential> <echo>Letter @{letter}</echo> </sequential> </for>

For task documentation

回答2:

The following build file will install Ant contrib automatically

<project name="ant-contrib-tasks" default="build">

    <available classname="net.sf.antcontrib.logic.ForTask" property="contrib.installed"/>

    <target name="install-contrib" unless="contrib.installed">
        <mkdir dir="${user.home}/.ant/lib"/>
        <get dest="${user.home}/.ant/lib/ant-contrib.jar" src="http://search.maven.org/remotecontent?filepath=ant-contrib/ant-contrib/1.0b3/ant-contrib-1.0b3.jar"/>
        <fail message="Ant Contrib installed - Run Ant again"/>
    </target>

    <target name="build" depends="install-contrib">
      <taskdef resource="net/sf/antcontrib/antlib.xml"/>

        <for param="file">
            <fileset dir="." includes="*.txt"/>
            <sequential>
                <echo message="Found file @{file}"/>
            </sequential>
        </for>
    </target>

</project>