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POAnt macrodef compilation task
 

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    <p>I have a compiler (and language) I am building that is normally invoked thus:</p> <pre><code>java -jar nc.jar \ -p some/referenced/package.nc \ -p framework.nc \ source1.ns source2.ns sourceN.ns \ -o output/package.nc </code></pre> <p>I'd like to include a task in my ANT build file that invokes the compiler to compile the standard library and all test cases, but specifying each separate compiler invocation as a <code>&lt;java&gt;</code> task is painful:</p> <pre><code>&lt;target name="framework" depends="compiler" description="Build the n framework"&gt; &lt;!-- More compile steps --&gt; &lt;java jar="nc.jar" fork="true"&gt; &lt;arg value="-p"/&gt; &lt;arg path="../nframework/build/n.core.nc"/&gt; &lt;arg path="../nframework/n/debug/DebugPrint.ns"/&gt; &lt;arg path="../nframework/n/debug/Trace.ns"/&gt; &lt;arg value="-o"/&gt; &lt;arg path="../nframework/build/n.debug.nc"/&gt; &lt;/java&gt; &lt;!-- More compile steps --&gt; &lt;/target&gt; </code></pre> <p>I would like to create an ANT task of some sort that can simplify this into something like:</p> <pre><code>&lt;target name="framework" depends="compiler" description="Build the n framework"&gt; &lt;!-- More compile steps --&gt; &lt;nc output="../nframework/build/n.debug.nc"&gt; &lt;link-package path="../nframework/build/n.core.nc"/&gt; &lt;src&gt; &lt;fileset dir="../nframework/n/debug" includes="**/*.ns"/&gt; &lt;/src&gt; &lt;/nc&gt; &lt;!-- More compile steps --&gt; &lt;/target&gt; </code></pre> <p>To this end, I tried macrodef:</p> <pre><code>&lt;macrodef name="nc"&gt; &lt;attribute name="output"/&gt; &lt;element name="link-package"/&gt; &lt;element name="src"/&gt; &lt;sequential&gt; &lt;java jar="nc.jar" fork="true"&gt; &lt;arg value="-p"/&gt; &lt;!-- This doesn't do what I want --&gt; &lt;link-package/&gt; &lt;!-- Neither does this --&gt; &lt;src/&gt; &lt;arg value="-o"/&gt; &lt;arg path="@{output}"/&gt; &lt;/java&gt; &lt;/sequential&gt; &lt;/macrodef&gt; </code></pre> <p>I've tried several variations on the above, but each errors out with something like: /home/jwarner/code/nlang/nc/build.xml:55: java doesn't support nested "fileset" element.</p> <p>Is there a way to do this without extending ANT itself? Alternatively, would it be fairly easy to add an ant task to my compiler? I'm not terribly picky about the syntax of the final <code>&lt;nc&gt;</code> task.</p>
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    1. USJoshua Warner
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    1. COYou mentioned that you didn't want to extend Ant itself, but if you don't get a simple answer to your problem I thought I'd mention that creating your own Ant task is very easy. Have a look at http://ant.apache.org/manual/develop.html#writingowntask
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      1. USKevin Stembridge
    2. COCould it mean exactly what it says? <java> can't take a fileset. You'd have to pass your paths in as a string, like <src>../nframework/n/debug</src>. I'd copy the javac task myself.
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      1. USBrian Henk
    3. CO@Kevin: You are right - I just looked in to that, and it seems much easier than I thought. So much more so than this `<macrodef>` approach, that if you posted "Extend Ant" as an answer (perhaps with an example of what methods would need to be defined in the task class), I'd accept it.
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      1. USJoshua Warner
 

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