provide possibility to set up data dir

src/main/scala/scoverage/ScoverageKeys.scala

@@ -18,4 +18,5 @@ object ScoverageKeys {
   lazy val coverageCleanSubprojectFiles = settingKey[Boolean]("removes subproject data after an aggregation")
   lazy val coverageOutputTeamCity = settingKey[Boolean]("turn on teamcity reporting")
   lazy val coverageScalacPluginVersion = settingKey[String]("version of scalac-scoverage-plugin to use")
+  lazy val coverageDataDir = settingKey[File]("directory where the measurements will be stored to use")
 }

src/main/scala/scoverage/ScoverageSbtPlugin.scala

@@ -44,11 +44,12 @@ object ScoverageSbtPlugin extends AutoPlugin {
     addCommandAlias("coverageOn", ";set coverageEnabled in ThisBuild := true") ++
     addCommandAlias("coverageOff", ";set coverageEnabled in ThisBuild := false")
 
-  override def projectSettings: Seq[Setting[_]] = Seq(
+  override def projectSettings: Seq[Setting[_]] = super.projectSettings ++ Seq(
     ivyConfigurations += ScoveragePluginConfig,
     coverageReport := coverageReport0.value,
     coverageAggregate := coverageAggregate0.value,
-    aggregate in coverageAggregate := false
+    aggregate in coverageAggregate := false,
+    coverageDataDir := crossTarget.value
   ) ++ coverageSettings ++ scalacSettings
 
   private lazy val coverageSettings = Seq(
@@ -77,7 +78,7 @@ object ScoverageSbtPlugin extends AutoPlugin {
         }
         Seq(
           Some(s"-Xplugin:${pluginPath.getAbsolutePath}"),
-          Some(s"-P:scoverage:dataDir:${crossTarget.value.getAbsolutePath}/scoverage-data"),
+          Some(s"-P:scoverage:dataDir:${coverageDataDir.value.getAbsolutePath}/scoverage-data"),
           Option(coverageExcludedPackages.value.trim).filter(_.nonEmpty).map(v => s"-P:scoverage:excludedPackages:$v"),
           Option(coverageExcludedFiles.value.trim).filter(_.nonEmpty).map(v => s"-P:scoverage:excludedFiles:$v"),
           // rangepos is broken in some releases of scala so option to turn it off
@@ -103,7 +104,7 @@ object ScoverageSbtPlugin extends AutoPlugin {
   }
 
   private lazy val coverageReport0 = Def.task {
-    val target = crossTarget.value
+    val target = coverageDataDir.value
     val log = streams.value.log
 
     log.info(s"Waiting for measurement data to sync...")
@@ -132,12 +133,12 @@ object ScoverageSbtPlugin extends AutoPlugin {
     val log = streams.value.log
     log.info(s"Aggregating coverage from subprojects...")
 
-    val xmlReportFiles = crossTarget.all(aggregateFilter).value map (_ / "scoverage-report" / Constants
+    val xmlReportFiles = coverageDataDir.all(aggregateFilter).value map (_ / "scoverage-report" / Constants
       .XMLReportFilename) filter (_.isFile())
     CoverageAggregator.aggregate(xmlReportFiles, coverageCleanSubprojectFiles.value) match {
       case Some(cov) =>
         writeReports(
-          crossTarget.value,
+          coverageDataDir.value,
           sourceDirectories.all(aggregateFilter).value.flatten,
           cov,
           coverageOutputCobertura.value,

src/sbt-test/scoverage/data-dir/build.sbt

@@ -0,0 +1,16 @@
+version := "0.1"
+
+scalaVersion := "2.10.4"
+
+libraryDependencies += "org.specs2" %% "specs2" % "2.3.13" % "test"
+
+coverageDataDir := target.value
+
+coverageMinimum := 80
+
+coverageFailOnMinimum := true
+
+resolvers ++= {
+  if (sys.props.get("plugin.version").map(_.endsWith("-SNAPSHOT")).getOrElse(false)) Seq(Resolver.sonatypeRepo("snapshots"))
+  else Seq.empty
+}

src/sbt-test/scoverage/data-dir/project/plugins.sbt

@@ -0,0 +1,14 @@
+val pluginVersion = sys.props.getOrElse(
+  "plugin.version",
+  throw new RuntimeException(
+    """|The system property 'plugin.version' is not defined.
+       |Specify this property using the scriptedLaunchOpts -D.""".stripMargin))
+
+addSbtPlugin("org.scoverage" % "sbt-scoverage" % pluginVersion)
+
+resolvers ++= {
+  if (pluginVersion.endsWith("-SNAPSHOT"))
+    Seq(Resolver.sonatypeRepo("snapshots"))
+  else
+    Seq.empty
+}

src/sbt-test/scoverage/data-dir/src/main/scala/GoodCoverage.scala

@@ -0,0 +1,6 @@
+object GoodCoverage {
+
+  def sum(num1: Int, num2: Int) = {
+    num1 + num2
+  }
+}

src/sbt-test/scoverage/data-dir/src/test/scala/GoodCoverageSpec.scala

@@ -0,0 +1,13 @@
+import org.specs2.mutable._
+
+/**
+ * Created by tbarke001c on 7/8/14.
+ */
+class GoodCoverageSpec extends Specification {
+
+  "GoodCoverage" should {
+    "sum two numbers" in {
+      GoodCoverage.sum(1, 2) mustEqual 3
+    }
+  }
+}

src/sbt-test/scoverage/data-dir/test

@@ -0,0 +1,7 @@
+# run scoverage
+> clean
+> coverage
+> test
+> coverageReport
+$ exists target/scoverage-data
+$ exists target/scoverage-report