Ant:仅当定义了path时才将文件添加到zip中

Question

我必须创建一个ant目标，将组件.jar添加到zip文件中。问题是我没有总是定义组件的版本。例如:

    <zip destfile="${dist.dir}result-${result-version}.zip">
       <fileset dir="${dist.dir}" includes="maincomponent-${maincomponenet-version}*.jar"/>
       <fileset dir="${second-componenet-folder}" includes="${second-component-version}.jar" />
   </zip>

如果没有定义second-component-version属性，我如何添加一些条件来创建带有主组件的zip ?

Answer 1

Using Condition and isset (conditions):

<target name="zip">
    <fileset id="main" dir="${dist.dir}" includes="maincomponent-${maincomponenet-version}.jar" />
    <fileset id="component" dir="${second-componenet-folder}" includes="${second-component-version}.jar" />
    <condition property="jar.file" value="component" else="main">
        <isset property="second-component-version"/>
    </condition>
    <zip destfile="${dist.dir}/result-${result-version}.zip">
        <fileset refid="${jar.file}" />
    </zip>
</target>