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

Basically I want to check if the file contains "SUCC开发者_运维问答ESS" 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

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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.

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If you are on Linux, you could simply wrap the Get command with the exec target in Ant

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