Different targets on Different OS with Ant

Question

I have an ant target I don't want called unless I am running ant on Linux (Not called on Windows)

<target name="jar.all" depends="clean,compile.nic,jar,jar.resources"/>

The target that I don't want called on Windows is: compile.nic

How can I do this?

Answer 1

Here is a real-world example for Windows vs. UNIX commands. The ELSE improves on previous answers.

<condition property="maven.executable" value="mvn.bat" else="mvn">
  <os family="windows" />
</condition>

<target name="clean">
  <exec executable="${maven.executable}">
    <arg value="clean" />
  </exec>
</target>

Answer 2

Can I make the Ant copy task OS-specific?

Additionally some tasks support os attribute. for example exec:

<exec executable="cmd" os="windows"/>