Cannot pass arguments using sbt to gatling simulation - scala

Question

Regarding to Gatling SBT execute a specific simulation topic is there any way to pass argument to simulation?
I've been trying passing command from any CLI like:
sbt -Dx=1 -Dy=2 -Dz=3 "gatling:testOnly fooSimulation"
and:
sbt "-Dx=1 -Dy=2 -Dz=3 gatling:testOnly fooSimulation"
and all similar variations, but in result it gives just a null value.
Same thing I was trying to do in sbt shell, because I use it as well, but no success at all. Maybe my specific configuration in build.sbt is the main reason why it doesn't work. Nevertheless I do not want to pass the arguments in config file, it should be dynamic.
build.sbt
name := "Gatling"
version := "0.1"
scalaVersion := "2.12.11"
enablePlugins(GatlingPlugin)
fork := true
scalacOptions := Seq(
"-encoding", "UTF-8", "-target:jvm-1.8", "-deprecation",
"-feature", "-unchecked", "-language:implicitConversions", "-language:postfixOps")
libraryDependencies += "io.gatling.highcharts" % "gatling-charts-highcharts" % "3.3.1" % Test
libraryDependencies += "io.gatling" % "gatling-test-framework" % "3.3.1" % Test
libraryDependencies += "org.json4s" % "json4s-native_2.12" % "3.6.7" % Test
libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.8" % Test
libraryDependencies += "com.microsoft.sqlserver" % "mssql-jdbc" % "7.2.2.jre8" % Test
libraryDependencies += "org.springframework.boot" % "spring-boot-starter" % "2.3.5.RELEASE" % Test
libraryDependencies += "com.typesafe" % "config" % "1.4.1" % Test
Test / javaOptions += "-DpropertiesFile=./src/test/resources/application.properties"
plugins.sbt
addSbtPlugin("io.gatling" % "gatling-sbt" % "3.2.0")
Example code:
class FooSimulation extends Simulation {
before {
println(s"x=${System.getProperty("x")}")
println(s"y=${System.getProperty("y")}")
println(s"z=${System.getProperty("z")}")
}
setUp(
scenario("Foo")
.exec( foo chain builder )
.inject( foo injection )
).protocols( foo protocol )
}
Additionally my sbt shell is running with prefix sbt:gatling, maybe this is the reason?

Answer 1

sbt -Dx=1 -Dy=2 -Dz=3 "gatling:testOnly fooSimulation" is correct.
But the modern sbt syntax is sbt -Dx=1 -Dy=2 -Dz=3 "Gatling/testOnly fooSimulation".
If it doesn't work, you probably have a typo somewhere, or possibly your version of sbt and Gatling are way too old and your should upgrade.