Add sbt-shading excludeDependencies test

sbt-shading/src/sbt-test/sbt-shading/exclude-dependencies/build.sbt

@@ -0,0 +1,17 @@
+
+enablePlugins(coursier.ShadingPlugin)
+shadingNamespace := "test.shaded"
+shadeNamespaces += "argonaut"
+
+libraryDependencies ++= Seq(
+  "com.github.alexarchambault" %% "argonaut-shapeless_6.2" % "1.2.0-M5" % "shaded",
+  // directly depending on that one for it not to be shaded
+  "org.scala-lang" % "scala-reflect" % scalaVersion.value
+)
+
+excludeDependencies += SbtExclusionRule("com.chuusai", "shapeless_2.11")
+
+scalaVersion := "2.11.8"
+organization := "io.get-coursier.test"
+name := "shading-exclude-dependencies"
+version := "0.1.0-SNAPSHOT"

sbt-shading/src/sbt-test/sbt-shading/exclude-dependencies/project/plugins.sbt

@@ -0,0 +1,31 @@
+{
+  val pluginVersion = sys.props.getOrElse(
+    "plugin.version",
+    throw new RuntimeException(
+      """|The system property 'plugin.version' is not defined.
+         |Specify this property using the scriptedLaunchOpts -D.""".stripMargin
+    )
+  )
+
+  addSbtPlugin("io.get-coursier" % "sbt-shading" % pluginVersion)
+}
+
+// for the locally publish jarjar
+resolvers += Resolver.mavenLocal
+
+val coursierJarjarVersion = "1.0.1-coursier-SNAPSHOT"
+
+def coursierJarjarFoundInM2 =
+  (file(sys.props("user.home")) / s".m2/repository/org/anarres/jarjar/jarjar-core/$coursierJarjarVersion").exists()
+
+def jarjarVersion =
+  if (coursierJarjarFoundInM2)
+    coursierJarjarVersion
+  else
+    sys.error(
+      "Ad hoc jarjar version not found. Run\n" +
+      "  git clone https://github.com/alexarchambault/jarjar.git && cd jarjar && git checkout 249c8dbb970f8 && ./gradlew install\n" +
+      "to run this test"
+    )
+
+libraryDependencies += "org.anarres.jarjar" % "jarjar-core" % jarjarVersion

sbt-shading/src/sbt-test/sbt-shading/exclude-dependencies/src/main/scala/Main.scala

@@ -0,0 +1,44 @@
+import java.io.File
+import java.nio.file.Files
+
+import argonaut._
+
+object Main extends App {
+
+  def excludeCheck(): Unit = {
+    val className = "shapeless.HList"
+    val loader = Thread.currentThread.getContextClassLoader
+
+    val found =
+      try {
+        loader.loadClass(className)
+        true
+      } catch {
+        case _: java.lang.ClassNotFoundException => false
+      }
+
+    assert(!found, s"Expected class $className not to be found")
+  }
+
+  excludeCheck()
+
+  val expectedClassName =
+    if (args.contains("--shaded"))
+      "test.shaded.argonaut.Json"
+    else
+      // Don't use the literal "argonaut.Json", that seems to get
+      // changed to "test.shaded.argonaut.Json" by shading
+      "argonaut" + '.' + "Json"
+
+  val className = classOf[Json].getName
+
+  Console.err.println(s"Expected class name: $expectedClassName")
+  Console.err.println(s"Class name: $className")
+
+  if (className != expectedClassName)
+    sys.error(s"Expected class name $expectedClassName, got $className")
+
+  val msg = Json.obj().nospaces
+
+  Files.write(new File("output").toPath, msg.getBytes("UTF-8"))
+}

sbt-shading/src/sbt-test/sbt-shading/exclude-dependencies/test

@@ -0,0 +1,9 @@
+$ delete output
+> run
+$ exists output
+> publishLocal
+$ exec java -jar coursier launch io.get-coursier.test:shading-exclude-dependencies_2.11:0.1.0-SNAPSHOT
+-$ exec java -jar coursier launch io.get-coursier.test:shading-exclude-dependencies_2.11:0.1.0-SNAPSHOT -- --shaded
+> shading:publishLocal
+-$ exec java -jar coursier launch io.get-coursier.test:shading-exclude-dependencies_2.11:0.1.0-SNAPSHOT
+$ exec java -jar coursier launch io.get-coursier.test:shading-exclude-dependencies_2.11:0.1.0-SNAPSHOT -- --shaded