Using ant, Fail if the file contains "SUCCESS" string

Question

Basically I want to check if the file contains "SUCCESS" string. If string not found then ant has to exit with error message. Please help me on this. I tried many links but did'nt get this answer

Answer 1

You can do this with the Ant fail task, assuming the file to check is called log.txt:

<fail message="SUCCESS Found...failing">
    <condition>
        <resourcecontains resource="log.txt" substring="SUCCESS"/>
    </condition>
</fail>

Here's an alternative approach, that you could adapt if you have more than one file to check.

<fileset id="success.file" dir="." includes="log.txt">
    <contains text="SUCCESS"/>
</fileset>
<fail message="SUCCESS Found...failing">
    <condition>
        <resourcecount when="greater" count="0" refid="success.file" />
    </condition>
</fail>

If none of the files in the fileset contain the string 'SUCCESS' then the fileset will be empty, so the build will not fail.