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https://issues.apache.org/jira/browse/SPARK-5312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15037808#comment-15037808
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Sean Owen commented on SPARK-5312:
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[~boyork] are you going to do more with this?

> Use sbt to detect new or changed public classes in PRs
> ------------------------------------------------------
>
>                 Key: SPARK-5312
>                 URL: https://issues.apache.org/jira/browse/SPARK-5312
>             Project: Spark
>          Issue Type: Improvement
>          Components: Project Infra
>            Reporter: Nicholas Chammas
>            Priority: Minor
>
> We currently use an [unwieldy grep/sed 
> contraption|https://github.com/apache/spark/blob/19556454881e05a6c2470d406d50f004b88088a2/dev/run-tests-jenkins#L152-L174]
>  to detect new public classes in PRs.
> -Apparently, sbt lets you get a list of public classes [much more 
> directly|http://www.scala-sbt.org/0.13/docs/Howto-Inspect-the-Build.html] via 
> {{show compile:discoveredMainClasses}}. We should use that instead.-
> There is a tool called [ClassUtil|http://software.clapper.org/classutil/] 
> that seems to help give this kind of information much more directly. We 
> should look into using that.



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