Determine which file has an error when running YUI compressor from Ant

I don't know how the yuicompressor works, I assume that it works on one file at a time.

If this is true, you can do it with for from ant-contrib. You would need to install ant-contrib prior.

<taskdef resource="net/sf/antcontrib/antcontrib.properties" classpath="${global.dir}/bin_data/ant-contrib-0.6.jar"/><for param="file">  <path>    <fileset dir="${global.dir}/" includes="**/*.js">      <exclude name="*.min.js" />    </fileset>  </path>  <sequential>    <echo>youcompressor for @{file}</echo> <!-- Will output each file and help debugging -->    <exec executable="yuicompressor"> <!-- I took the args from the official documentation-->      <arg value="--type=js" />      <arg value="-o" />      <arg value="'.js$:-min.js'" />      <arg value="@{file}" />    </exec>  </sequential></for>

Try using this option:

-v, --verbose Display informational messages and warnings.

There is a nice entry in the documentation for a cases like yours:

Don't hesitate to use the -v option. Although not a replacement for JSLint, it will output some helpful hints when it senses that something might be wrong with your code.

Did you try

<apply … verbose="true">

Whether to print a summary after execution or not. Since Ant 1.6.

Ideally it would print a statement before attempting to execute on the file, but having a summary afterwards at least lets you see the last successful file, which should point you to the broken file as the filesets are usually alphanumerically sequenced.