customizing build parameters

Signed-off-by: Yitao Li <[email protected]>

build.sbt

@@ -29,9 +29,9 @@ lazy val formattingPreferences = {
 }
 
 lazy val compilationSettings = scalariformSettings ++ Seq(
-  version := "0.6.0-SNAPSHOT",
+  version := sys.props.getOrElse("version", default = "0.6.0-SNAPSHOT"),
   organization := "com.twosigma",
-  scalaVersion := "2.12.10",
+  scalaVersion := sys.props.getOrElse("scala.version", default = "2.12.8"),
   assemblyOption in assembly := (assemblyOption in assembly).value.copy(includeScala = false),
   javacOptions ++= Seq("-source", "1.7", "-target", "1.7"),
   compileOrder in Compile := CompileOrder.JavaThenScala,
@@ -58,7 +58,7 @@ lazy val versions = new {
   val commons_math = "3.5"
   val joda_time = "2.9.4"
   val httpclient = "4.3.2" // Note that newer versions need to be configured
-  val spark = "3.0.0-preview2" // sys.props.getOrElse("spark.version", default = "2.4.3")
+  val spark = sys.props.getOrElse("spark.version", default = "2.4.3")
   val scalatest = "3.0.8"
   val scalacheck = "1.12.6"
   val grizzled_slf4j = "1.3.0"

scripts/build_spark_3.0_artifacts.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+set -e
+
+sbt -Dversion='0.6.1-SNAPSHOT' -Dscala.version='2.12.10' -Dspark.version='3.0.0-preview2' assemblyNoTest