title: Passing command line parameters to target that uses them in exec
body: <p>ant bootstrap arg1 arg2 arg3</p>
  <p>I need to echo &quot;arg1 arg2 arg3&quot; so that I can call a program with those arguments</p>
  <p>Searching the web the following should work but does not.</p>
  <pre><code> &lt;target name=&quot;bootstrap&quot;&gt;
       &lt;echo&gt;${arg0} ${arg1} ${arg2} &lt;/echo&gt;
       &lt;!--exec executable=&quot;cmd&quot;&gt;
          &lt;arg value=&quot;${arg0}&quot;/&gt;
          &lt;arg value=&quot;${arg1}&quot;/&gt;
          &lt;arg value=&quot;${arg2}&quot;/&gt;
       &lt;/exec--&gt;
   &lt;/target&gt;
  </code></pre>
  <p>Also, any thoughts on what if the user passes in 5 args or 1 arg.  I need to fail it does not not have the right number of args.</p>