Question

Explain what is fail task in Apche-Ant with example?

Answer 1

Ant provides the fail task which allows to fail the build if a condition is not met. For example the following task would check for the existence of a file and if this file is not present the build would fail.

<fail message="PDF file was not created.">
   <condition>
      <not>
          <available file="${pdf.dir}/path/book.pdf" />
      </not>
    </condition>
</fail>

Or you can check for the number of files generated.

<fail message="Files are missing.">
    <condition>
        <not>
            <resourcecount count="2">
                <fileset id="fs" dir="." includes="one.txt,two.txt"/>
            </resourcecount>
        </not>
    </condition>
</fail>