[jira] [Commented] (SPARK-4501) Create build/mvn to automatically download maven/zinc/scalac

["Sean Owen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-4501?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14219173#comment-14219173 ] 

Sean Owen commented on SPARK-4501:
----------------------------------

Automatically setting up zinc sounds like a good idea just for Jenkins. It sounds like it won't interfere with other zinc installations -- and ideally, doesn't even download zinc if it's running.

Installing Maven may be overkill? just about any system already has mvn on it right? Just thinking about the build complexity here vs value added.

> Create build/mvn to automatically download maven/zinc/scalac
> ------------------------------------------------------------
>
>                 Key: SPARK-4501
>                 URL: https://issues.apache.org/jira/browse/SPARK-4501
>             Project: Spark
>          Issue Type: New Feature
>          Components: Build
>            Reporter: Patrick Wendell
>            Assignee: Prashant Sharma
>
> For a long time we've had the sbt/sbt and this works well for users who want to build Spark with minimal dependencies (only Java). It would be nice to generalize this to maven as well and have build/sbt and build/mvn, where build/mvn was a script that downloaded Maven, Zinc, and Scala locally and set them up correctly. This would be totally "opt in" and people using system maven would be able to continue doing so.
> My sense is that very few maven users are currently using Zinc even though from some basic tests I saw a huge improvement from using this. Also, having a simple way to use Zinc would make it easier to use Maven on our jenkins test machines.



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