Add date and hash to publishing version

2 files changed, 22 insertions, 2 deletions

diff --git a/project/Build.scala b/project/Build.scala
index c07fab230..85a7bb861 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -25,7 +25,8 @@ object DottyBuild extends Build {
   override def settings: Seq[Setting[_]] = {
     super.settings ++ Seq(
       scalaVersion in Global := "2.11.5",
-      version in Global := "0.1-SNAPSHOT",
+      version in Global :=
+        "0.1-SNAPSHOT-" + VersionUtil.commitDate + "-" + VersionUtil.gitHash,
       organization in Global := "ch.epfl.lamp",
       organizationName in Global := "LAMP/EPFL",
       organizationHomepage in Global := Some(url("http://lamp.epfl.ch")),
@@ -208,7 +209,8 @@ object DottyBuild extends Build {
         "org.scala-sbt" % "api" % sbtVersion.value % "test",
         "org.specs2" %% "specs2" % "2.3.11" % "test"
       ),
-      version := "0.1.1-SNAPSHOT",
+      version :=
+        "0.1.1-SNAPSHOT-" + VersionUtil.commitDate + "-" + VersionUtil.gitHash,
       // The sources should be published with crossPaths := false, the binaries
       // are unused so it doesn't matter.
       crossPaths := false,
diff --git a/project/VersionUtil.scala b/project/VersionUtil.scala
new file mode 100644
index 000000000..338cf2d95
--- /dev/null
+++ b/project/VersionUtil.scala
@@ -0,0 +1,18 @@
+import scala.sys.process.Process
+
+object VersionUtil {
+  def executeScript(scriptName: String) = {
+    val cmd =
+      if (System.getProperty("os.name").toLowerCase.contains("windows"))
+        s"cmd.exe /c scripts\\build\\$scriptName.bat -p"
+      else s"scripts/build/$scriptName"
+    Process(cmd).lines.head.trim
+  }
+
+  /** Seven letters of the SHA hash is considered enough to uniquely identify a
+   *  commit, albeit extremely large projects - such as the Linux kernel - need
+   *  more letters to stay unique
+   */
+  def gitHash = executeScript("get-scala-commit-sha").substring(0, 7)
+  def commitDate = executeScript("get-scala-commit-date")
+}