Update sbt to 0.13.16; add Scala 2.12 support. (#639)

* Update sbt to 0.13.16; add Scala 2.12 support.
To clean, test, and build Scala 2.11 and Scala 2.12 versions:
  % sbt +clean +test +publishLocal

* Update Travis to test in 2.11.11 and 2.12.3

* Try different way of providing Travis Scala version

* Attempt to get verilator built before tests.

1 files changed, 44 insertions, 15 deletions

diff --git a/build.sbt b/build.sbt
index 1bb393fc..637e2390 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,13 +2,11 @@
 
 // sbt-site - sbt-ghpages
 
-site.settings
+enablePlugins(SiteScaladocPlugin)
 
-site.includeScaladoc()
+enablePlugins(GhpagesPlugin)
 
-ghpages.settings
-
-git.remoteRepo := "git@github.com:ucb-bar/firrtl.git"
+git.remoteRepo := "git@github.com:freechipsproject/firrtl.git"
 
 // Firrtl code
 
@@ -20,19 +18,49 @@ version := "1.1-SNAPSHOT"
 
 scalaVersion := "2.11.11"
 
-javacOptions ++= Seq("-source", "1.7", "-target", "1.7")
+crossScalaVersions := Seq("2.11.11", "2.12.3")
+
+def scalacOptionsVersion(scalaVersion: String): Seq[String] = {
+  Seq() ++ {
+    // If we're building with Scala > 2.11, enable the compile option
+    //  switch to support our anonymous Bundle definitions:
+    //  https://github.com/scala/bug/issues/10047
+    CrossVersion.partialVersion(scalaVersion) match {
+      case Some((2, scalaMajor: Int)) if scalaMajor < 12 => Seq()
+      case _ => Seq("-Xsource:2.11")
+    }
+  }
+}
+
+scalacOptions := scalacOptionsVersion(scalaVersion.value)
+
+def javacOptionsVersion(scalaVersion: String): Seq[String] = {
+  Seq() ++ {
+    // Scala 2.12 requires Java 8, but we continue to generate
+    //  Java 7 compatible code until we need Java 8 features
+    //  for compatibility with old clients.
+    CrossVersion.partialVersion(scalaVersion) match {
+      case Some((2, scalaMajor: Int)) if scalaMajor < 12 =>
+        Seq("-source", "1.7", "-target", "1.7")
+      case _ =>
+        Seq("-source", "1.8", "-target", "1.8")
+    }
+  }
+}
+
+javacOptions ++= javacOptionsVersion(scalaVersion.value)
 
 libraryDependencies += "org.scala-lang" % "scala-reflect" % scalaVersion.value
 
-libraryDependencies += "com.typesafe.scala-logging" %% "scala-logging" % "3.5.0"
+libraryDependencies += "com.typesafe.scala-logging" %% "scala-logging" % "3.7.2"
 
-libraryDependencies += "ch.qos.logback" % "logback-classic" % "1.1.7"
+libraryDependencies += "ch.qos.logback" % "logback-classic" % "1.2.3"
 
 libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.1" % "test"
 
 libraryDependencies += "org.scalacheck" %% "scalacheck" % "1.13.4" % "test"
 
-libraryDependencies += "com.github.scopt" %% "scopt" % "3.5.0"
+libraryDependencies += "com.github.scopt" %% "scopt" % "3.6.0"
 
 libraryDependencies += "net.jcazevedo" %% "moultingyaml" % "0.4.0"
 
@@ -54,14 +82,15 @@ antlr4GenListener in Antlr4 := false // default = true
 
 antlr4PackageName in Antlr4 := Option("firrtl.antlr")
 
+antlr4Version in Antlr4 := "4.7"
+
 // ScalaDoc
 
-import UnidocKeys._
+enablePlugins(ScalaUnidocPlugin)
+
+doc in Compile := (doc in ScalaUnidoc).value
 
-lazy val customUnidocSettings = unidocSettings ++ Seq (
-  doc in Compile := (doc in ScalaUnidoc).value,
-  target in unidoc in ScalaUnidoc := crossTarget.value / "api"
-)
+//target in unidoc in ScalaUnidoc := crossTarget.value / "api"
 
 autoAPIMappings := true
 
@@ -71,4 +100,4 @@ scalacOptions in Compile in doc ++= Seq(
   "-doc-version", version.value,
   "-doc-title", name.value,
   "-doc-root-content", baseDirectory.value+"/root-doc.txt"
-)
+) ++ scalacOptionsVersion(scalaVersion.value)