ant:exec的宏，用于回显它执行的命令，包括参数

目前我这样做：

  <echo message="cd ${build.dir}/scripts ; ./update.sh ${arg1} ${arg2} ${arg3} ${arg4} ${arg5} ${arg6} ; cd -" />
  <exec dir="${build.dir}/scripts"
        executable="./update.sh"
        resultproperty="update.result" >
    <arg value="${arg1}"/>
    <arg value="${arg2}"/>
    <arg value="${arg3}"/>
    <arg value="${arg4}"/>
    <arg value="${arg5}"/>
    <arg value="${arg6}"/>
  </exec>

其结果与上述相同

其中，

execWithEcho

将是定义如下的宏：

<macrodef name="execWithEcho">
  <attribute name="attr.dir"
             description="Directory to run exec in."/>
  <attribute name="attr.executable"
             description="The executable target."/>
  <attribute name="attr.resultProperty"
             description="The property to set the retern value of the target executable/"/>
  <sequential>
    <echo message="//TODO implement echo in execWithEcho"/>
    <exec dir="@{attr.dir}"
          executable="@{attr.executable}"
          resultProperty="@{attr.resultProperty}">
          <!-- args go here -->
    </exec>
  </sequential>
</macrodef>

这里我不确定的是如何迭代传入的所有子

元素；以echo语句所需的方式将它们连接到单个字符串中

---

提前谢谢

看到马克的答案了吗？把回音放在update.sh中不是比放在ant中更容易吗？

<macrodef name="execWithEcho">
  <attribute name="attr.dir"
             description="Directory to run exec in."/>
  <attribute name="attr.executable"
             description="The executable target."/>
  <attribute name="attr.resultProperty"
             description="The property to set the retern value of the target executable/"/>
  <sequential>
    <echo message="//TODO implement echo in execWithEcho"/>
    <exec dir="@{attr.dir}"
          executable="@{attr.executable}"
          resultProperty="@{attr.resultProperty}">
          <!-- args go here -->
    </exec>
  </sequential>
</macrodef>