Start multiple docker containers (#4)

* Start multiple docker containers

* Remove experimental code

* Remove this too

* Update README

Author: matthewdunbar

README.md

@@ -28,7 +28,7 @@ starting up dynamodb-local and binding it to port 8000 on the host. When the tes
 container will be shutdown.
 
 ```
-testDockerConfig := Some(DockerConfig("amazon/dynamodb-local", 8000, 8000)),
+testDockerConfig := Seq(DockerConfig("amazon/dynamodb-local", 8000, 8000)),
 testDockerStart  := testDockerStart.dependsOn(Test / compile).value,
 Test / test      := (Test / test).dependsOn(testDockerStart).value,
 Test / testOnly  := (Test / testOnly).dependsOn(testDockerStart).evaluated,

src/main/scala/com/lifeway/sbt/testdocker/StartTestDocker.scala

@@ -12,10 +12,11 @@ import scala.util.Try
 object StartTestDocker {
   private def isHostPortActive(port: Int): Boolean = Try(new Socket("localhost", port).close()).isSuccess
   def apply(
-      dockerConfigOpt: Option[DockerConfig],
+      dockerConfig: Seq[DockerConfig],
       streamz: TaskStreams
   ): Unit = {
-    dockerConfigOpt.fold(streamz.log.error("DOCKER WILL NOT BE STARTING. CONFIGURATION NOT PROVIDED")) { config =>
+    if (dockerConfig.length == 0) streamz.log.error("DOCKER WILL NOT BE STARTING. CONFIGURATION NOT PROVIDED")
+    dockerConfig.foreach { config =>
       val containerImage = config.image
       val containerPort  = config.containerPort
       val hostPort       = config.hostPort

src/main/scala/com/lifeway/sbt/testdocker/StopTestDocker.scala

@@ -7,7 +7,7 @@ import TestDockerKeys.DockerConfig
 import scala.sys.process._
 
 object StopTestDocker {
-  def apply(dockerConfig: Option[DockerConfig], streamz: TaskStreams): Unit = {
+  def apply(dockerConfig: Seq[DockerConfig], streamz: TaskStreams): Unit = {
     dockerConfig.foreach { config =>
       streamz.log.info(s"Stopping test-docker on port ${config.hostPort}")
       s"docker stop sbt-testdocker-${config.hostPort}".!

src/main/scala/com/lifeway/sbt/testdocker/TestDockerKeys.scala

@@ -9,14 +9,14 @@ import scala.concurrent.duration._
 
 object TestDockerKeys {
   case class DockerConfig(image: String, containerPort: Int, hostPort: Int)
-  lazy val testDockerConfig = settingKey[Option[DockerConfig]]("Container image, container port, and host port to use.")
+  lazy val testDockerConfig = settingKey[Seq[DockerConfig]]("Container image, container port, and host port to use.")
 
   lazy val testDockerStart   = TaskKey[Unit]("start-test-docker")
   lazy val testDockerStop    = TaskKey[Unit]("stop-test-docker")
   lazy val testDockerCleanup = TaskKey[Tests.Cleanup]("test-docker-test-cleanup")
 
   lazy val baseTestDockerSettings = Seq(
-    testDockerConfig := None,
+    testDockerConfig := Nil,
     testDockerStart := StartTestDocker(
       testDockerConfig.value,
       streams.value