Introduce `buildDirectory` setting.

This settings determines location of where class files, jars, and other
build products will go. By default, it's `./build-sbt`. It makes it easier
to compare what Ant and sbt builds do.

Also, changed `SettingKey` to `settingKey`. The latter is a macro that
automatically determines `label` of a setting and takes a description as
argument. Before that, `SettingKey("my desc")` would create a setting key
with `label` set to "my desc". Not what we wanted.

1 files changed, 6 insertions, 4 deletions

diff --git a/build.sbt b/build.sbt
index c0e8a4fb0d..842bf41d23 100644
--- a/build.sbt
+++ b/build.sbt
@@ -70,7 +70,7 @@ lazy val commonSettings = Seq[Setting[_]](
   scalaSource in Compile := (sourceDirectory in Compile).value,
   javaSource in Compile := (sourceDirectory in Compile).value,
   target := (baseDirectory in ThisBuild).value / "target" / name.value,
-  classDirectory in Compile := (baseDirectory in ThisBuild).value / "build/quick/classes" / name.value,
+  classDirectory in Compile := buildDirectory.value / "quick/classes" / name.value,
   artifactPath in packageBin in Compile := {
     // two lines below are copied over from sbt's sources:
     // https://github.com/sbt/sbt/blob/0.13/main/src/main/scala/sbt/Defaults.scala#L628
@@ -80,7 +80,7 @@ lazy val commonSettings = Seq[Setting[_]](
     // uncomment the other definition of the `resolvedArtifactName`
     val resolvedArtifact = artifact.value
     val resolvedArtifactName = s"${resolvedArtifact.name}.${resolvedArtifact.extension}"
-    (baseDirectory in ThisBuild).value / "build/pack/lib" / resolvedArtifactName
+    buildDirectory.value / "pack/lib" / resolvedArtifactName
   },
   // given that classDirectory is overriden to be _outside_ of target directory, we have
   // to make sure its being cleaned properly
@@ -158,8 +158,8 @@ def configureAsSubproject(project: Project): Project = {
   (project in base).settings(commonSettings: _*)
 }
 
-lazy val copyrightString = SettingKey[String]("Copyright string.")
-
+lazy val buildDirectory = settingKey[File]("The directory where all build products go. By default ./build")
+lazy val copyrightString = settingKey[String]("Copyright string.")
 lazy val generateVersionPropertiesFile = taskKey[File]("Generating version properties file.")
 
 lazy val generateVersionPropertiesFileImpl: Def.Initialize[Task[File]] = Def.task {
@@ -208,3 +208,5 @@ lazy val generateVersionPropertiesFileImpl: Def.Initialize[Task[File]] = Def.tas
 
   propFile
 }
+
+buildDirectory in ThisBuild := (baseDirectory in ThisBuild).value / "build-sbt"