Phing - How to interact with the shell

If you ever wonder how to answer prompts of commands you execute through the Phing exec task, here is the solution. It's easy but since I didn't find it explicitly documented anywhere I thought I'd write it down in public:

<target name="interact">
    <exec command="somecommand" passthru="true" />
</target>

The solution is to set passthru="true". Then the prompts will be displayed by phing and you can answer them as if you were calling the commands directly in the shell. Works on Linux and Windows.