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<html lang="en-us"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="UTF-8"><meta name="copyright" content="(C) Copyright 2019"><meta name="DC.rights.owner" content="(C) Copyright 2019"><meta name="DC.type" content="task"><meta name="description" content="You can add an Ant target to the pre-processing pipeline. This enables you to insert additional processing before or after the pre-processing chain or a specific step in the pre-processing operation."><meta name="DC.subject" content="plug-ins, Ant, preprocessing"><meta name="keywords" content="plug-ins, Ant, preprocessing"><meta name="DC.relation" scheme="URI" content="../topics/plugin-applications.html"><meta name="DC.relation" scheme="URI" content="../extension-points/plugin-extension-points-pre-processing.html"><meta name="DC.relation" scheme="URI" content="../topics/plugins-installing.html"><meta name="DC.format" content="HTML5"><meta name="DC.identifier" content="plugin-antpreprocess"><meta name="DC.language" content="en-US"><link rel="stylesheet" type="text/css" href="../css/commonltr.css"><link rel="stylesheet" type="text/css" href="../css/dita-ot-doc.css"><title>Adding an Ant target to the pre-processing pipeline</title></head><body id="plugin-antpreprocess"><header role="banner"><div class="header">
  <p>DITA Open Toolkit</p>
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  <h1 class="title topictitle1" id="ariaid-title1">Adding an Ant target to the pre-processing pipeline</h1>
  
  
  <div class="body taskbody"><p class="shortdesc">You can add an Ant target to the pre-processing pipeline. This enables you to insert additional processing
    before or after the pre-processing chain or a specific step in the pre-processing operation.</p>
    <section class="section context"><div class="tasklabel"><h2 class="sectiontitle tasklabel">About this task</h2></div>
      <p class="p">You can use the <code class="ph codeph">depend.preprocess.pre</code> and <code class="ph codeph">depend.preprocess.post</code> extension
        points to run a target before or after the entire pre-processing operation. In addition, there are extension
        points that enable you to run an Ant target before specific pre-processing steps.</p>
      <div class="note tip note_tip"><span class="note__title">Tip:</span> For maximum compatibility with future versions of
            DITA-OT, most plug-ins should use the extension points that run <strong class="ph b">before</strong> or <strong class="ph b">after</strong>
            pre-processing.</div>
    </section>
    <section><div class="tasklabel"><h2 class="sectiontitle tasklabel">Procedure</h2></div><ol class="ol steps"><li class="li step stepexpand">
        <span class="ph cmd">Define and integrate the new Ant target.</span>
      </li><li class="li step stepexpand">
        <span class="ph cmd">Create the following <span class="ph filepath">plugin.xml</span> file:</span>
        <div class="itemgroup info"><pre class="pre codeblock language-xml normalize-space show-line-numbers show-whitespace"><code>&lt;plugin id="<var class="keyword varname">plugin-id</var>"&gt;
  &lt;feature extension="<var class="keyword varname">extension-point</var>" value="<var class="keyword varname">Ant-target</var>"/&gt;
&lt;/plugin&gt;</code></pre>where
          <ul class="ul">
            <li class="li"><var class="keyword varname">plugin-id</var> is the plug-in identifier.</li>
            <li class="li"><var class="keyword varname">extension-point</var> is a pre-processing extension point.</li>
            <li class="li"><var class="keyword varname">Ant-target</var> is the name of the Ant target.</li>
          </ul></div>
      </li><li class="li step stepexpand">
        <span class="ph cmd">Install the plug-in.</span>
      </li></ol></section>
    <section class="section result"><div class="tasklabel"><h2 class="sectiontitle tasklabel">Results</h2></div>The new target is added to the Ant dependency list. The new target is now always run in conjunction with the
      specified step in the pre-processing pipeline.</section>
    <section class="example"><h2 class="title sectiontitle">Example</h2>
      
      <p class="p">The following <span class="ph filepath">plugin.xml</span> file specifies that the
          <span class="keyword parmname">myAntTargetBeforeChunk</span> target is always run before the <code class="ph codeph">chunk</code> step in the
        pre-processing stage.</p>
      <pre class="pre codeblock language-xml normalize-space show-line-numbers show-whitespace"><code>&lt;plugin id="com.example.extendchunk"&gt;
  &lt;feature extension="depend.preprocess.chunk.pre" 
           value="myAntTargetBeforeChunk"/&gt;
&lt;/plugin&gt;</code></pre>
      <p class="p">It assumes that the <span class="keyword parmname">myAntTargetBeforeChunk</span> target has already been defined and
        integrated.</p>
      <div class="note caution note_caution"><span class="note__title">CAUTION:</span> The internal order of preprocessing steps is
            subject to change between versions of DITA-OT. New versions may remove, reorder, combine, or add steps to
            the process, so the extension points <strong class="ph b">within</strong> the preprocessing stage should only be used if absolutely
            necessary.</div>
    </section>
  </div>
<nav role="navigation" class="related-links"><div class="familylinks"><div class="parentlink"><strong>Parent topic:</strong> <a class="link" href="../topics/plugin-applications.html" title="Plug-ins allow you to extend the functionality of DITA-OT. This might entail adding support for specialized document types, integrating processing overrides, or defining new output transformations.">Plug-in applications</a></div></div><div class="linklist relinfo reltasks"><strong>Related tasks</strong><br><ul class="linklist"><li class="linklist"><a class="link" href="../topics/plugins-installing.html" title="Use the dita command to install a plug-in.">Installing plug-ins</a></li></ul></div><div class="linklist relinfo relref"><strong>Related reference</strong><br><ul class="linklist"><li class="linklist"><a class="link" href="../extension-points/plugin-extension-points-pre-processing.html" title="You can use these extension points to run an Ant target before or after the pre-processing stage. If necessary, you can also run an Ant target before a specific pre-processing step — but this approach is not recommended.">Pre-processing extension points</a></li></ul></div></nav></article></main></body></html>