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https://issues.apache.org/jira/browse/KAFKA-139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13420728#comment-13420728
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derek commented on KAFKA-139:
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1. +package will compile, test, and package for all cross-build Scala versions
(2.8.0, 2.9.1), while package simply runs it for the default Scala version
(2.8.0). See https://github.com/harrah/xsbt/wiki/Cross-Build for more details.
2. I'll upload a new patch with Release.scala removed
3. I'm not sure. As part of the patch I had to upgrade scalatest, so this may
be some change in behavior there
4. With a multi-module project, SBT 0.10+ will run a given command for all
subprojects. If you want to run a command for a particular sub-project you can
prefix it with "projectname/". For example, to run the test above, just do:
core/test-only kafka.integration.LazyInitProducerTest
> cross-compile multiple Scala versions
> -------------------------------------
>
> Key: KAFKA-139
> URL: https://issues.apache.org/jira/browse/KAFKA-139
> Project: Kafka
> Issue Type: Improvement
> Components: packaging
> Affects Versions: 0.8
> Reporter: Chris Burroughs
> Labels: build
> Fix For: 0.8
>
> Attachments: kafka-sbt0-11-3-0.8-v2.patch,
> kafka-sbt0-11-3-0.8-v3.patch, kafka-sbt0-11-3-0.8.patch, kafka-sbt0-11-3.patch
>
>
> Since scala does not maintain binary compatibly between versions,
> organizations tend to have to move all of there code at the same time. It
> would thus be very helpful if we could cross build multiple scala versions.
> http://code.google.com/p/simple-build-tool/wiki/CrossBuild
> Unclear if this would require KAFKA-134 or just work.
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