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[SPARK-4429][BUILD] Build for Scala 2.11 using sbt fails. #3342

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ueshin wants to merge 3 commits into from
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[SPARK-4429][BUILD] Build for Scala 2.11 using sbt fails. #3342

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ce98d0f
Set non-empty value to system property "scala-2.11" if the property e…
ueshin Nov 17, 2014
4eef52b
Remove unneeded condition.
ueshin Nov 18, 2014
14d86e8
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ueshin Nov 19, 2014
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13 changes: 6 additions & 7 deletions project/SparkBuild.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -101,14 +101,13 @@ object SparkBuild extends PomBuild {
v.split("(\\s+|,)").filterNot(_.isEmpty).map(_.trim.replaceAll("-P", "")).toSeq
}

if (profiles.exists(_.contains("scala-"))) {
profiles
} else if (System.getProperty("scala-2.11") != null) {
profiles ++ Seq("scala-2.11")
} else {
println("Enabled default scala profile")
profiles ++ Seq("scala-2.10")
if (System.getProperty("scala-2.11") == "") {
// To activate scala-2.11 profile, replace empty property value to non-empty value
// in the same way as Maven which handles -Dname as -Dname=true before executes build process.
// see: https://github.com/apache/maven/blob/maven-3.0.4/maven-embedder/src/main/java/org/apache/maven/cli/MavenCli.java#L1082
System.setProperty("scala-2.11", "true")
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@pwendell pwendell Nov 19, 2014

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Could you add a comment here and link to the maven code this is replicating? It might be tricky for other developers to understand why this exists.

}
profiles
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@sryza sryza Nov 18, 2014

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Why do we no longer need to turn the scala-2.10 profile on in this case? Will Maven turn it on automatically?

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@ueshin ueshin Nov 18, 2014

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Yes, the profile scala-2.10 is activated by the condition:

<property><name>!scala-2.11</name></property>

so Maven will turn it on if the property scala-2.11 is null or empty.

}

Properties.envOrNone("SBT_MAVEN_PROPERTIES") match {
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