Report git-hash used to package the distribution - Closes #1319

2 files changed, 22 insertions, 1 deletions

diff --git a/src/dotty/tools/dotc/repl/InterpreterLoop.scala b/src/dotty/tools/dotc/repl/InterpreterLoop.scala
index 8b1000f2e..b3ac41c55 100644
--- a/src/dotty/tools/dotc/repl/InterpreterLoop.scala
+++ b/src/dotty/tools/dotc/repl/InterpreterLoop.scala
@@ -66,7 +66,8 @@ class InterpreterLoop(compiler: Compiler, config: REPL.Config)(implicit ctx: Con
     output.flush()
   }
 
-  val version = ".next (pre-alpha)"
+  val gitHash = ManifestInfo.attributes.getOrElse("Git-Hash", "unknown")
+  val version = s".next (pre-alpha, git-hash: $gitHash)"
 
   /** The main read-eval-print loop for the interpreter.  It calls
    *  `command()` for each line of input.
diff --git a/src/dotty/tools/dotc/repl/ManifestInfo.scala b/src/dotty/tools/dotc/repl/ManifestInfo.scala
new file mode 100644
index 000000000..206dccd67
--- /dev/null
+++ b/src/dotty/tools/dotc/repl/ManifestInfo.scala
@@ -0,0 +1,20 @@
+package dotty.tools.dotc.repl
+
+import java.net.JarURLConnection
+import scala.collection.JavaConversions._
+
+object ManifestInfo {
+
+  val attributes: Map[String, String] = {
+    for {
+      resourceUrl <- Option(getClass.getResource(getClass.getSimpleName + ".class"))
+      urlConnection = resourceUrl.openConnection() if urlConnection.isInstanceOf[JarURLConnection]
+      manifest <- Option(urlConnection.asInstanceOf[JarURLConnection].getManifest)
+    } yield {
+      manifest.getMainAttributes.foldLeft(Map[String, String]())(
+        (map, attribute) => map + (attribute._1.toString -> attribute._2.toString)
+      )
+    }
+  }.getOrElse(Map())
+
+}