From fb455acf5d10c2d457fa4011056ac17696e2d3e4 Mon Sep 17 00:00:00 2001
From: Jakob Odersky <jakob@driver.xyz>
Date: Mon, 28 Aug 2017 15:19:21 -0700
Subject: Package integration tests

---
 .../xyz.driver.sbt/IntegrationTestPackaging.scala  | 86 ++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 src/main/scala/xyz.driver.sbt/IntegrationTestPackaging.scala

diff --git a/src/main/scala/xyz.driver.sbt/IntegrationTestPackaging.scala b/src/main/scala/xyz.driver.sbt/IntegrationTestPackaging.scala
new file mode 100644
index 0000000..a5a16bc
--- /dev/null
+++ b/src/main/scala/xyz.driver.sbt/IntegrationTestPackaging.scala
@@ -0,0 +1,86 @@
+package xyz.driver.sbt
+
+import java.nio.file._
+
+import scala.collection.JavaConverters._
+
+import com.typesafe.sbt.packager._
+import com.typesafe.sbt.packager.Keys._
+import com.typesafe.sbt.packager.docker._
+import com.typesafe.sbt.packager.docker.DockerPlugin.autoImport.Docker
+import com.typesafe.sbt.packager.universal._
+import com.typesafe.sbt.packager.universal.UniversalPlugin.autoImport._
+import sbt._
+import sbt.Keys._
+
+object IntegrationTestPackaging extends AutoPlugin {
+
+  override def requires = UniversalPlugin && DockerPlugin
+  override def trigger  = AllRequirements
+
+  object autoImport {
+    val IntegrationTest = config("it") extend (Test) // make test classes available
+  }
+  import autoImport._
+
+  private def list(base: Path): Seq[(Path, String)] = base match {
+    case _ if Files.isRegularFile(base) => Seq(base -> base.getFileName.toString)
+    case _ if Files.isDirectory(base) =>
+      Files.walk(base).iterator().asScala.toSeq.map { file =>
+        file -> base.relativize(file).toString
+      }
+  }
+
+  override def projectSettings = Seq(
+    mappings in Universal ++= {
+      val cp: Seq[(File, String)] = (dependencyClasspath in IntegrationTest).value
+        .map(_.data.toPath)
+        .flatMap(list)
+        .map {
+          case (file, location) =>
+            file.toFile -> ("lib-it/" + location)
+        }
+
+      val tests: Seq[(File, String)] = list((packageBin in IntegrationTest).value.toPath)
+        .map {
+          case (file, location) =>
+            file.toFile -> ("lib-it/" + location)
+        }
+
+      val script = {
+        def libs(mappings: Seq[(File, String)]): String =
+          mappings
+            .map {
+              case (_, location) =>
+                s"$$bin_dir/../$location"
+            }
+            .mkString(":")
+        s"""|#!/bin/bash
+            |bin_dir="$$(dirname "$$(readlink -f "$$0")")"
+            |exec java \\
+            |        -cp "${libs(tests ++ cp)}" \\
+            |        org.scalatest.tools.Runner \\
+            |        -o \\
+            |        -R "${libs(tests)}"
+            |""".stripMargin
+      }
+
+      val scriptFile = (resourceManaged in IntegrationTest).value / "runit"
+      IO.write(scriptFile, script)
+      scriptFile.setExecutable(true)
+
+      cp ++ tests ++ Seq(scriptFile -> s"bin/${normalizedName.value}-it")
+    },
+    dockerCommands in Docker := {
+      (dockerCommands in Docker).value ++ Seq(
+        ExecCmd("RUN", "mkdir", "-p", "/test"),
+        ExecCmd("RUN",
+                "ln",
+                "-s",
+                s"${(defaultLinuxInstallLocation in Docker).value}/bin/${normalizedName.value}-it",
+                "/test/run_integration_test.sh")
+      )
+    }
+  )
+
+}
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