Putting the sha where it belongs.

build.sbt

name := "test-build"

organization := "org.cosomojo"

version := "1.0.0-SNAPSHOT"

val sha = settingKey[String]("current git commit SHA")
sha in ThisBuild := Process("git rev-parse HEAD").lines.head.take(8)
version :=  s"${version.value}" + (if (version.value.contains("-SNAPSHOT"))  "" else s"-${sha.value}")

enablePlugins(BuildInfoPlugin)
buildInfoKeys     ++= Seq[BuildInfoKey](
  name,
  version,
  scalaVersion,
  sbtVersion,
  sha
)