Swap over to simplified Mill module/source layout from SBT's

Removes a lot of useless folders and gives us a chance to exercise this simplified layout. Support for the SBT layout is still verified by our integration tests

17 files changed, 637 insertions, 0 deletions

diff --git a/scalalib/test/resources/gen-idea/idea/libraries/modules_scala-xml_2.12_1.0.6_scala-xml_2.12-1.0.6-sources.jar.xml b/scalalib/test/resources/gen-idea/idea/libraries/modules_scala-xml_2.12_1.0.6_scala-xml_2.12-1.0.6-sources.jar.xml
new file mode 100644
index 00000000..a6398d46
--- /dev/null
+++ b/scalalib/test/resources/gen-idea/idea/libraries/modules_scala-xml_2.12_1.0.6_scala-xml_2.12-1.0.6-sources.jar.xml
@@ -0,0 +1,7 @@
+<component name="libraryTable">
+    <library name="modules_scala-xml_2.12_1.0.6_scala-xml_2.12-1.0.6-sources.jar">
+        <CLASSES>
+            <root url="jar:COURSIER_HOME/cache/v1/https/repo1.maven.org/maven2/org/scala-lang/modules/scala-xml_2.12/1.0.6/scala-xml_2.12-1.0.6-sources.jar!/"/>
+        </CLASSES>
+    </library>
+</component>
\ No newline at end of file
diff --git a/scalalib/test/resources/gen-idea/idea/libraries/modules_scala-xml_2.12_1.0.6_scala-xml_2.12-1.0.6.jar.xml b/scalalib/test/resources/gen-idea/idea/libraries/modules_scala-xml_2.12_1.0.6_scala-xml_2.12-1.0.6.jar.xml
new file mode 100644
index 00000000..5e21f3f3
--- /dev/null
+++ b/scalalib/test/resources/gen-idea/idea/libraries/modules_scala-xml_2.12_1.0.6_scala-xml_2.12-1.0.6.jar.xml
@@ -0,0 +1,7 @@
+<component name="libraryTable">
+    <library name="modules_scala-xml_2.12_1.0.6_scala-xml_2.12-1.0.6.jar">
+        <CLASSES>
+            <root url="jar:COURSIER_HOME/cache/v1/https/repo1.maven.org/maven2/org/scala-lang/modules/scala-xml_2.12/1.0.6/scala-xml_2.12-1.0.6.jar!/"/>
+        </CLASSES>
+    </library>
+</component>
\ No newline at end of file
diff --git a/scalalib/test/resources/gen-idea/idea/libraries/scala-compiler_2.12.4_scala-compiler-2.12.4-sources.jar.xml b/scalalib/test/resources/gen-idea/idea/libraries/scala-compiler_2.12.4_scala-compiler-2.12.4-sources.jar.xml
new file mode 100644
index 00000000..fe9d533a
--- /dev/null
+++ b/scalalib/test/resources/gen-idea/idea/libraries/scala-compiler_2.12.4_scala-compiler-2.12.4-sources.jar.xml
@@ -0,0 +1,7 @@
+<component name="libraryTable">
+    <library name="scala-compiler_2.12.4_scala-compiler-2.12.4-sources.jar">
+        <CLASSES>
+            <root url="jar:COURSIER_HOME/cache/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-compiler/2.12.4/scala-compiler-2.12.4-sources.jar!/"/>
+        </CLASSES>
+    </library>
+</component>
\ No newline at end of file
diff --git a/scalalib/test/resources/gen-idea/idea/libraries/scala-compiler_2.12.4_scala-compiler-2.12.4.jar.xml b/scalalib/test/resources/gen-idea/idea/libraries/scala-compiler_2.12.4_scala-compiler-2.12.4.jar.xml
new file mode 100644
index 00000000..ec0460d7
--- /dev/null
+++ b/scalalib/test/resources/gen-idea/idea/libraries/scala-compiler_2.12.4_scala-compiler-2.12.4.jar.xml
@@ -0,0 +1,7 @@
+<component name="libraryTable">
+    <library name="scala-compiler_2.12.4_scala-compiler-2.12.4.jar">
+        <CLASSES>
+            <root url="jar:COURSIER_HOME/cache/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-compiler/2.12.4/scala-compiler-2.12.4.jar!/"/>
+        </CLASSES>
+    </library>
+</component>
\ No newline at end of file
diff --git a/scalalib/test/resources/gen-idea/idea/libraries/scala-library_2.12.4_scala-library-2.12.4-sources.jar.xml b/scalalib/test/resources/gen-idea/idea/libraries/scala-library_2.12.4_scala-library-2.12.4-sources.jar.xml
new file mode 100644
index 00000000..a1278e29
--- /dev/null
+++ b/scalalib/test/resources/gen-idea/idea/libraries/scala-library_2.12.4_scala-library-2.12.4-sources.jar.xml
@@ -0,0 +1,7 @@
+<component name="libraryTable">
+    <library name="scala-library_2.12.4_scala-library-2.12.4-sources.jar">
+        <CLASSES>
+            <root url="jar:COURSIER_HOME/cache/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-library/2.12.4/scala-library-2.12.4-sources.jar!/"/>
+        </CLASSES>
+    </library>
+</component>
\ No newline at end of file
diff --git a/scalalib/test/resources/gen-idea/idea/libraries/scala-library_2.12.4_scala-library-2.12.4.jar.xml b/scalalib/test/resources/gen-idea/idea/libraries/scala-library_2.12.4_scala-library-2.12.4.jar.xml
new file mode 100644
index 00000000..bbd957f0
--- /dev/null
+++ b/scalalib/test/resources/gen-idea/idea/libraries/scala-library_2.12.4_scala-library-2.12.4.jar.xml
@@ -0,0 +1,7 @@
+<component name="libraryTable">
+    <library name="scala-library_2.12.4_scala-library-2.12.4.jar">
+        <CLASSES>
+            <root url="jar:COURSIER_HOME/cache/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-library/2.12.4/scala-library-2.12.4.jar!/"/>
+        </CLASSES>
+    </library>
+</component>
\ No newline at end of file
diff --git a/scalalib/test/resources/gen-idea/idea/libraries/scala-reflect_2.12.4_scala-reflect-2.12.4-sources.jar.xml b/scalalib/test/resources/gen-idea/idea/libraries/scala-reflect_2.12.4_scala-reflect-2.12.4-sources.jar.xml
new file mode 100644
index 00000000..09db75bb
--- /dev/null
+++ b/scalalib/test/resources/gen-idea/idea/libraries/scala-reflect_2.12.4_scala-reflect-2.12.4-sources.jar.xml
@@ -0,0 +1,7 @@
+<component name="libraryTable">
+    <library name="scala-reflect_2.12.4_scala-reflect-2.12.4-sources.jar">
+        <CLASSES>
+            <root url="jar:COURSIER_HOME/cache/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-reflect/2.12.4/scala-reflect-2.12.4-sources.jar!/"/>
+        </CLASSES>
+    </library>
+</component>
\ No newline at end of file
diff --git a/scalalib/test/resources/gen-idea/idea/libraries/scala-reflect_2.12.4_scala-reflect-2.12.4.jar.xml b/scalalib/test/resources/gen-idea/idea/libraries/scala-reflect_2.12.4_scala-reflect-2.12.4.jar.xml
new file mode 100644
index 00000000..f23b80f6
--- /dev/null
+++ b/scalalib/test/resources/gen-idea/idea/libraries/scala-reflect_2.12.4_scala-reflect-2.12.4.jar.xml
@@ -0,0 +1,7 @@
+<component name="libraryTable">
+    <library name="scala-reflect_2.12.4_scala-reflect-2.12.4.jar">
+        <CLASSES>
+            <root url="jar:COURSIER_HOME/cache/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-reflect/2.12.4/scala-reflect-2.12.4.jar!/"/>
+        </CLASSES>
+    </library>
+</component>
\ No newline at end of file
diff --git a/scalalib/test/resources/gen-idea/idea/misc.xml b/scalalib/test/resources/gen-idea/idea/misc.xml
new file mode 100644
index 00000000..2726692f
--- /dev/null
+++ b/scalalib/test/resources/gen-idea/idea/misc.xml
@@ -0,0 +1,5 @@
+<project version="4">
+    <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8 (1)" project-jdk-type="JavaSDK">
+        <output url="file://$PROJECT_DIR$/target/idea_output"/>
+    </component>
+</project>
\ No newline at end of file
diff --git a/scalalib/test/resources/gen-idea/idea/modules.xml b/scalalib/test/resources/gen-idea/idea/modules.xml
new file mode 100644
index 00000000..374b9a1f
--- /dev/null
+++ b/scalalib/test/resources/gen-idea/idea/modules.xml
@@ -0,0 +1,8 @@
+<project version="4">
+    <component name="ProjectModuleManager">
+        <modules>
+            <module fileurl="file://$PROJECT_DIR$/.idea_modules/root.iml" filepath="$PROJECT_DIR$/.idea_modules/root.iml"/>
+            <module fileurl="file://$PROJECT_DIR$/.idea_modules/.iml" filepath="$PROJECT_DIR$/.idea_modules/.iml"/>
+        </modules>
+    </component>
+</project>
\ No newline at end of file
diff --git a/scalalib/test/resources/gen-idea/idea_modules/iml b/scalalib/test/resources/gen-idea/idea_modules/iml
new file mode 100644
index 00000000..548865f1
--- /dev/null
+++ b/scalalib/test/resources/gen-idea/idea_modules/iml
@@ -0,0 +1,22 @@
+<module type="JAVA_MODULE" version="4">
+    <component name="NewModuleRootManager">
+        <output url="file://$MODULE_DIR$/../target/workspace/gen-idea/out/compile/dest/classes"/>
+        <exclude-output/>
+        <content url="file://$MODULE_DIR$/../target/workspace/hello-world/src/src">
+            <sourceFolder url="file://$MODULE_DIR$/../target/workspace/hello-world/src/src" isTestSource="false"/>
+        </content>
+        <content url="file://$MODULE_DIR$/../target/workspace/hello-world/src/resources">
+            <sourceFolder url="file://$MODULE_DIR$/../target/workspace/hello-world/src/resources" isTestSource="false" type="java-resource"/>
+        </content>
+        <orderEntry type="inheritedJdk"/>
+        <orderEntry type="sourceFolder" forTests="false"/>
+        <orderEntry type="library" name="modules_scala-xml_2.12_1.0.6_scala-xml_2.12-1.0.6-sources.jar" level="project"/>
+        <orderEntry type="library" name="modules_scala-xml_2.12_1.0.6_scala-xml_2.12-1.0.6.jar" level="project"/>
+        <orderEntry type="library" name="scala-compiler_2.12.4_scala-compiler-2.12.4-sources.jar" level="project"/>
+        <orderEntry type="library" name="scala-compiler_2.12.4_scala-compiler-2.12.4.jar" level="project"/>
+        <orderEntry type="library" name="scala-library_2.12.4_scala-library-2.12.4-sources.jar" level="project"/>
+        <orderEntry type="library" name="scala-library_2.12.4_scala-library-2.12.4.jar" level="project"/>
+        <orderEntry type="library" name="scala-reflect_2.12.4_scala-reflect-2.12.4-sources.jar" level="project"/>
+        <orderEntry type="library" name="scala-reflect_2.12.4_scala-reflect-2.12.4.jar" level="project"/>
+    </component>
+</module>
\ No newline at end of file
diff --git a/scalalib/test/resources/gen-idea/idea_modules/root.iml b/scalalib/test/resources/gen-idea/idea_modules/root.iml
new file mode 100644
index 00000000..dcf5f7fc
--- /dev/null
+++ b/scalalib/test/resources/gen-idea/idea_modules/root.iml
@@ -0,0 +1,9 @@
+<module type="JAVA_MODULE" version="4">
+    <component name="NewModuleRootManager">
+        <output url="file://$MODULE_DIR$/../out"/>
+        <content url="file://$MODULE_DIR$/.."/>
+        <exclude-output/>
+        <orderEntry type="inheritedJdk"/>
+        <orderEntry type="sourceFolder" forTests="false"/>
+    </component>
+</module>
\ No newline at end of file
diff --git a/scalalib/test/resources/hello-world/src/Main.scala b/scalalib/test/resources/hello-world/src/Main.scala
new file mode 100644
index 00000000..14139d6f
--- /dev/null
+++ b/scalalib/test/resources/hello-world/src/Main.scala
@@ -0,0 +1,12 @@
+import scala.collection._ // unused import to check unused imports warning
+import java.nio.file.{Files, Paths}
+
+object Main extends App {
+
+  val person = Person.fromString("rockjam:25")
+  val greeting = s"hello ${person.name}, your age is: ${person.age}"
+  println(greeting)
+  val resultPath = Paths.get(args(0))
+  Files.createDirectories(resultPath.getParent)
+  Files.write(resultPath, greeting.getBytes)
+}
diff --git a/scalalib/test/resources/hello-world/src/Result.scala b/scalalib/test/resources/hello-world/src/Result.scala
new file mode 100644
index 00000000..d7d29a51
--- /dev/null
+++ b/scalalib/test/resources/hello-world/src/Result.scala
@@ -0,0 +1,7 @@
+object Person {
+  def fromString(s: String): Person = {
+    val Array(name, age) = s.split(":")
+    Person(name, age.toInt)
+  }
+}
+case class Person(name: String, age: Int)
diff --git a/scalalib/test/src/mill/scalalib/GenIdeaTests.scala b/scalalib/test/src/mill/scalalib/GenIdeaTests.scala
new file mode 100644
index 00000000..36945f65
--- /dev/null
+++ b/scalalib/test/src/mill/scalalib/GenIdeaTests.scala
@@ -0,0 +1,78 @@
+package mill.scalalib
+
+import ammonite.ops._
+import mill._
+
+import mill.util.{TestEvaluator, TestUtil}
+import utest._
+
+object GenIdeaTests extends TestSuite {
+
+  val basePath = pwd / 'target / 'workspace / "gen-idea"
+  val outPath = basePath / 'out
+  val workingSrcPath = basePath / 'src
+
+  trait HelloWorldModule extends scalalib.ScalaModule {
+    def scalaVersion = "2.12.4"
+    def basePath = HelloWorldTests.workingSrcPath
+  }
+
+  object HelloWorld extends TestUtil.BaseModule with HelloWorldModule
+
+  val helloWorldEvaluator = new TestEvaluator(
+    HelloWorld,
+    outPath,
+    workingSrcPath
+  )
+
+  def tests: Tests = Tests {
+    'genIdeaTests - {
+      helloWorldEvaluator(HelloWorld.scalaVersion)
+      val x = GenIdea.xmlFileLayout(helloWorldEvaluator.evaluator, HelloWorld)
+      val pp = new scala.xml.PrettyPrinter(999, 4)
+
+      for((relPath, xml) <- GenIdea.xmlFileLayout(helloWorldEvaluator.evaluator, HelloWorld)){
+        write.over(basePath/ "generated"/ relPath, pp.format(xml))
+      }
+
+      Seq(
+        "gen-idea/idea_modules/iml" ->
+          basePath / "generated" / ".idea_modules" /".iml",
+        "gen-idea/idea_modules/root.iml" ->
+          basePath / "generated" / ".idea_modules" /"root.iml",
+        "gen-idea/idea/libraries/scala-reflect_2.12.4_scala-reflect-2.12.4-sources.jar.xml" ->
+          basePath / "generated" / ".idea" / "libraries" / "scala-reflect_2.12.4_scala-reflect-2.12.4-sources.jar.xml",
+        "gen-idea/idea/libraries/scala-reflect_2.12.4_scala-reflect-2.12.4.jar.xml" ->
+          basePath / "generated" / ".idea" / "libraries" / "scala-reflect_2.12.4_scala-reflect-2.12.4.jar.xml",
+        "gen-idea/idea/libraries/scala-library_2.12.4_scala-library-2.12.4.jar.xml" ->
+          basePath / "generated" / ".idea" / "libraries" / "scala-library_2.12.4_scala-library-2.12.4.jar.xml",
+        "gen-idea/idea/libraries/modules_scala-xml_2.12_1.0.6_scala-xml_2.12-1.0.6.jar.xml" ->
+          basePath / "generated" / ".idea" / "libraries" / "modules_scala-xml_2.12_1.0.6_scala-xml_2.12-1.0.6.jar.xml",
+        "gen-idea/idea/libraries/modules_scala-xml_2.12_1.0.6_scala-xml_2.12-1.0.6-sources.jar.xml" ->
+          basePath / "generated" / ".idea" / "libraries" / "modules_scala-xml_2.12_1.0.6_scala-xml_2.12-1.0.6-sources.jar.xml",
+        "gen-idea/idea/libraries/scala-compiler_2.12.4_scala-compiler-2.12.4-sources.jar.xml" ->
+          basePath / "generated" / ".idea" / "libraries" / "scala-compiler_2.12.4_scala-compiler-2.12.4-sources.jar.xml",
+        "gen-idea/idea/libraries/scala-library_2.12.4_scala-library-2.12.4-sources.jar.xml" ->
+          basePath / "generated" / ".idea" / "libraries" / "scala-library_2.12.4_scala-library-2.12.4-sources.jar.xml",
+        "gen-idea/idea/libraries/scala-compiler_2.12.4_scala-compiler-2.12.4.jar.xml" ->
+          basePath / "generated" / ".idea" / "libraries" / "scala-compiler_2.12.4_scala-compiler-2.12.4.jar.xml",
+        "gen-idea/idea/modules.xml" ->
+          basePath / "generated" / ".idea" / "modules.xml",
+        "gen-idea/idea/misc.xml" ->
+          basePath / "generated" / ".idea" / "misc.xml",
+      ).foreach { case (resource, generated) =>
+          println("checking "+resource)
+          val resourceString = scala.io.Source.fromResource(resource).getLines().mkString("\n")
+          val generatedString = normaliseLibraryPaths(read! generated)
+
+          assert(resourceString == generatedString)
+        }
+    }
+  }
+
+
+  private val libPathRegex =  """([\w/]+)/.coursier""".r
+  private def normaliseLibraryPaths(in: String): String = {
+    libPathRegex.replaceAllIn(in, "COURSIER_HOME")
+  }
+}
diff --git a/scalalib/test/src/mill/scalalib/HelloWorldTests.scala b/scalalib/test/src/mill/scalalib/HelloWorldTests.scala
new file mode 100644
index 00000000..8ac45bf3
--- /dev/null
+++ b/scalalib/test/src/mill/scalalib/HelloWorldTests.scala
@@ -0,0 +1,400 @@
+package mill.scalalib
+
+import java.util.jar.JarFile
+
+import ammonite.ops._
+import ammonite.ops.ImplicitWd._
+import mill._
+import mill.define.Target
+import mill.eval.{Evaluator, Result}
+import mill.scalalib.publish._
+import mill.util.{TestEvaluator, TestUtil}
+import sbt.internal.inc.CompileFailed
+import utest._
+
+import scala.collection.JavaConverters._
+
+
+object HelloWorldTests extends TestSuite {
+  trait HelloWorldModule extends scalalib.ScalaModule {
+    def scalaVersion = "2.12.4"
+    def basePath = HelloWorldTests.workingSrcPath
+  }
+
+  object HelloWorld extends TestUtil.BaseModule with HelloWorldModule
+  object CrossHelloWorld extends TestUtil.BaseModule {
+    object cross extends Cross[HelloWorldCross]("2.10.6", "2.11.11", "2.12.3", "2.12.4")
+    class HelloWorldCross(v: String) extends HelloWorldModule {
+      def scalaVersion = v
+    }
+  }
+
+  object HelloWorldWithMain extends TestUtil.BaseModule with HelloWorldModule {
+    def mainClass = Some("Main")
+  }
+
+  object HelloWorldWithMainAssembly extends TestUtil.BaseModule with HelloWorldModule {
+    def mainClass = Some("Main")
+    def assembly = T{
+      mill.modules.Jvm.createAssembly(
+        runClasspath().map(_.path).filter(exists),
+        prependShellScript = prependShellScript(),
+        mainClass = mainClass()
+      )
+    }
+  }
+
+  object HelloWorldWarnUnused extends TestUtil.BaseModule with HelloWorldModule {
+    def scalacOptions = T(Seq("-Ywarn-unused"))
+  }
+
+  object HelloWorldFatalWarnings extends TestUtil.BaseModule with HelloWorldModule {
+    def scalacOptions = T(Seq("-Ywarn-unused", "-Xfatal-warnings"))
+  }
+
+  object HelloWorldWithPublish extends TestUtil.BaseModule with HelloWorldModule with PublishModule {
+    def artifactName = "hello-world"
+    def publishVersion = "0.0.1"
+
+    def pomSettings = PomSettings(
+      organization = "com.lihaoyi",
+      description = "hello world ready for real world publishing",
+      url = "https://github.com/lihaoyi/hello-world-publish",
+      licenses = Seq(
+        License("Apache License, Version 2.0",
+          "http://www.apache.org/licenses/LICENSE-2.0")),
+      scm = SCM(
+        "https://github.com/lihaoyi/hello-world-publish",
+        "scm:git:https://github.com/lihaoyi/hello-world-publish"
+      ),
+      developers =
+        Seq(Developer("lihaoyi", "Li Haoyi", "https://github.com/lihaoyi"))
+    )
+  }
+  object HelloWorldScalaOverride extends TestUtil.BaseModule with HelloWorldModule {
+    override def scalaVersion: Target[String] = "2.11.11"
+  }
+  val srcPath = pwd / 'scalalib / 'test / 'resources / "hello-world"
+  val basePath = pwd / 'target / 'workspace / "hello-world"
+  val workingSrcPath = basePath / 'src
+  val outPath = basePath / 'out
+  val mainObject = workingSrcPath / 'src / "Main.scala"
+
+
+
+
+  val helloWorldEvaluator = new TestEvaluator(
+    HelloWorld,
+    outPath,
+    workingSrcPath
+  )
+  val helloWorldWithMainEvaluator = new TestEvaluator(
+    HelloWorldWithMain,
+    outPath,
+    workingSrcPath
+  )
+  val helloWorldWithMainAssemblyEvaluator = new TestEvaluator(
+    HelloWorldWithMainAssembly,
+    outPath,
+    workingSrcPath
+  )
+  val helloWorldFatalEvaluator = new TestEvaluator(
+    HelloWorldFatalWarnings,
+    outPath,
+    workingSrcPath
+  )
+  val helloWorldOverrideEvaluator = new TestEvaluator(
+    HelloWorldScalaOverride,
+    outPath,
+    workingSrcPath
+  )
+  val helloWorldCrossEvaluator = new TestEvaluator(
+    CrossHelloWorld,
+    outPath,
+    workingSrcPath
+  )
+
+
+  def tests: Tests = Tests {
+    prepareWorkspace()
+    'scalaVersion - {
+      'fromBuild - {
+        val Right((result, evalCount)) = helloWorldEvaluator(HelloWorld.scalaVersion)
+
+        assert(
+          result == "2.12.4",
+          evalCount > 0
+        )
+      }
+      'override - {
+        val Right((result, evalCount)) = helloWorldOverrideEvaluator(HelloWorldScalaOverride.scalaVersion)
+
+        assert(
+          result == "2.11.11",
+          evalCount > 0
+        )
+      }
+    }
+    'scalacOptions - {
+      'emptyByDefault - {
+        val Right((result, evalCount)) = helloWorldEvaluator(HelloWorld.scalacOptions)
+
+        assert(
+          result.isEmpty,
+          evalCount > 0
+        )
+      }
+      'override - {
+        val Right((result, evalCount)) = helloWorldFatalEvaluator(HelloWorldFatalWarnings.scalacOptions)
+
+        assert(
+          result == Seq("-Ywarn-unused", "-Xfatal-warnings"),
+          evalCount > 0
+        )
+      }
+    }
+    'compile - {
+      'fromScratch - {
+        val Right((result, evalCount)) = helloWorldEvaluator(HelloWorld.compile)
+
+        val analysisFile = result.analysisFile
+        val outputFiles = ls.rec(result.classes.path)
+        val expectedClassfiles = compileClassfiles.map(outPath / 'compile / 'dest / 'classes / _)
+        assert(
+          result.classes.path == outPath / 'compile / 'dest / 'classes,
+          exists(analysisFile),
+          outputFiles.nonEmpty,
+          outputFiles.forall(expectedClassfiles.contains),
+          evalCount > 0
+        )
+
+        // don't recompile if nothing changed
+        val Right((_, unchangedEvalCount)) = helloWorldEvaluator(HelloWorld.compile)
+        assert(unchangedEvalCount == 0)
+      }
+      'recompileOnChange - {
+        val Right((_, freshCount)) = helloWorldEvaluator(HelloWorld.compile)
+        assert(freshCount > 0)
+
+        write.append(mainObject, "\n")
+
+        val Right((_, incCompileCount)) = helloWorldEvaluator(HelloWorld.compile)
+        assert(incCompileCount > 0, incCompileCount < freshCount)
+      }
+      'failOnError - {
+        write.append(mainObject, "val x: ")
+
+        val Left(Result.Exception(err, _)) = helloWorldEvaluator(HelloWorld.compile)
+
+        assert(err.isInstanceOf[CompileFailed])
+
+        val paths = Evaluator.resolveDestPaths(
+          outPath,
+          HelloWorld.compile.ctx.segments
+        )
+
+        assert(
+          ls.rec(paths.dest / 'classes).isEmpty,
+          !exists(paths.meta)
+        )
+        // Works when fixed
+        write.over(mainObject, read(mainObject).dropRight("val x: ".length))
+
+        val Right((result, evalCount)) = helloWorldEvaluator(HelloWorld.compile)
+      }
+      'passScalacOptions - {
+        // compilation fails because of "-Xfatal-warnings" flag
+        val Left(Result.Exception(err, _)) = helloWorldFatalEvaluator(HelloWorldFatalWarnings.compile)
+
+        assert(err.isInstanceOf[CompileFailed])
+      }
+    }
+    'runMain - {
+      'runMainObject - {
+        val runResult = basePath / 'out / 'runMain / 'dest / "hello-mill"
+
+        val Right((_, evalCount)) = helloWorldEvaluator(HelloWorld.runMain("Main", runResult.toString))
+        assert(evalCount > 0)
+
+        assert(
+          exists(runResult),
+          read(runResult) == "hello rockjam, your age is: 25"
+        )
+      }
+      'runCross{
+        def cross(v: String) {
+
+          val runResult = basePath / 'out / 'cross / v / 'runMain / 'dest / "hello-mill"
+
+          val Right((_, evalCount)) = helloWorldCrossEvaluator(
+            CrossHelloWorld.cross(v).runMain("Main", runResult.toString)
+          )
+
+          assert(evalCount > 0)
+
+
+          assert(
+            exists(runResult),
+            read(runResult) == "hello rockjam, your age is: 25"
+          )
+        }
+        'v210 - cross("2.10.6")
+        'v211 - cross("2.11.11")
+        'v2123 - cross("2.12.3")
+        'v2124 - cross("2.12.4")
+      }
+
+
+      'notRunInvalidMainObject - {
+        val Left(Result.Exception(err, _)) = helloWorldEvaluator(HelloWorld.runMain("Invalid"))
+
+        assert(
+          err.isInstanceOf[InteractiveShelloutException]
+        )
+      }
+      'notRunWhenComplileFailed - {
+        write.append(mainObject, "val x: ")
+
+        val Left(Result.Exception(err, _)) = helloWorldEvaluator(HelloWorld.runMain("Main"))
+
+        assert(
+          err.isInstanceOf[CompileFailed]
+        )
+      }
+    }
+
+    'forkRun - {
+      'runIfMainClassProvided - {
+        val runResult = basePath / 'out / 'run / 'dest / "hello-mill"
+        val Right((_, evalCount)) = helloWorldWithMainEvaluator(
+          HelloWorldWithMain.forkRun(runResult.toString)
+        )
+
+        assert(evalCount > 0)
+
+
+        assert(
+          exists(runResult),
+          read(runResult) == "hello rockjam, your age is: 25"
+        )
+      }
+      'notRunWithoutMainClass - {
+        val Left(Result.Exception(err, _)) = helloWorldEvaluator(HelloWorld.forkRun())
+
+        assert(
+          err.isInstanceOf[RuntimeException]
+        )
+      }
+    }
+    'run - {
+      'runIfMainClassProvided - {
+        val runResult = basePath / 'out / 'run / 'dest / "hello-mill"
+        val Right((_, evalCount)) = helloWorldWithMainEvaluator(
+          HelloWorldWithMain.run(runResult.toString)
+        )
+
+        assert(evalCount > 0)
+
+
+        assert(
+          exists(runResult),
+          read(runResult) == "hello rockjam, your age is: 25"
+        )
+      }
+      'notRunWithoutMainClass - {
+        val Left(Result.Exception(err, _)) = helloWorldEvaluator(HelloWorld.run())
+
+        assert(
+          err.isInstanceOf[RuntimeException]
+        )
+      }
+    }
+    'jar - {
+      'nonEmpty - {
+        val Right((result, evalCount)) = helloWorldWithMainEvaluator(HelloWorldWithMain.jar)
+
+        assert(
+          exists(result.path),
+          evalCount > 0
+        )
+
+        val jarFile = new JarFile(result.path.toIO)
+        val entries = jarFile.entries().asScala.map(_.getName).toSet
+
+        val manifestFiles = Seq[RelPath](
+          "META-INF" / "MANIFEST.MF"
+        )
+        val expectedFiles = compileClassfiles ++ manifestFiles
+
+        assert(
+          entries.nonEmpty,
+          entries == expectedFiles.map(_.toString()).toSet
+        )
+
+        val mainClass = jarMainClass(jarFile)
+        assert(mainClass.contains("Main"))
+      }
+      'logOutputToFile {
+        helloWorldEvaluator(HelloWorld.compile)
+
+        val logFile = outPath / 'compile / 'log
+        assert(exists(logFile))
+      }
+    }
+    'assembly - {
+      'assembly - {
+        val Right((result, evalCount)) = helloWorldWithMainAssemblyEvaluator(HelloWorldWithMainAssembly.assembly)
+        assert(
+          exists(result.path),
+          evalCount > 0
+        )
+        val jarFile = new JarFile(result.path.toIO)
+        val entries = jarFile.entries().asScala.map(_.getName).toSet
+
+        assert(entries.contains("Main.class"))
+        assert(entries.exists(s => s.contains("scala/Predef.class")))
+
+        val mainClass = jarMainClass(jarFile)
+        assert(mainClass.contains("Main"))
+      }
+      'run - {
+        val Right((result, evalCount)) = helloWorldWithMainAssemblyEvaluator(HelloWorldWithMainAssembly.assembly)
+
+        assert(
+          exists(result.path),
+          evalCount > 0
+        )
+        val runResult = basePath / "hello-mill"
+
+        %%("java", "-jar", result.path, runResult)(wd = basePath)
+
+        assert(
+          exists(runResult),
+          read(runResult) == "hello rockjam, your age is: 25"
+        )
+      }
+    }
+  }
+
+  def jarMainClass(jar: JarFile): Option[String] = {
+    import java.util.jar.Attributes._
+    val attrs = jar.getManifest.getMainAttributes.asScala
+    attrs.get(Name.MAIN_CLASS).map(_.asInstanceOf[String])
+  }
+
+  def compileClassfiles = Seq[RelPath](
+    "Main.class",
+    "Main$.class",
+    "Main$delayedInit$body.class",
+    "Person.class",
+    "Person$.class"
+  )
+
+  def prepareWorkspace(): Unit = {
+    rm(outPath)
+    rm(workingSrcPath)
+    mkdir(outPath)
+    cp(srcPath, workingSrcPath)
+  }
+
+}
diff --git a/scalalib/test/src/mill/scalalib/ResolveDepsTests.scala b/scalalib/test/src/mill/scalalib/ResolveDepsTests.scala
new file mode 100644
index 00000000..d1ddde20
--- /dev/null
+++ b/scalalib/test/src/mill/scalalib/ResolveDepsTests.scala
@@ -0,0 +1,40 @@
+package mill.scalalib
+
+import coursier.Cache
+import coursier.maven.MavenRepository
+import mill.eval.Result.{Failure, Success}
+import mill.eval.{PathRef, Result}
+import mill.util.Loose.Agg
+import utest._
+
+object ResolveDepsTests extends TestSuite {
+  val repos = Seq(Cache.ivy2Local, MavenRepository("https://repo1.maven.org/maven2"))
+
+  def evalDeps(deps: Agg[Dep]): Result[Agg[PathRef]] = Lib.resolveDependencies(repos, "2.12.4", "2.12", deps)
+
+  val tests = Tests {
+    'resolveValidDeps - {
+      val deps = Agg(ivy"com.lihaoyi::pprint:0.5.3")
+      val Success(paths) = evalDeps(deps)
+      assert(paths.nonEmpty)
+    }
+
+    'errOnInvalidOrgDeps - {
+      val deps = Agg(ivy"xxx.yyy.invalid::pprint:0.5.3")
+      val Failure(errMsg) = evalDeps(deps)
+      assert(errMsg.contains("xxx.yyy.invalid"))
+    }
+
+    'errOnInvalidVersionDeps - {
+      val deps = Agg(ivy"com.lihaoyi::pprint:invalid.version.num")
+      val Failure(errMsg) = evalDeps(deps)
+      assert(errMsg.contains("invalid.version.num"))
+    }
+
+    'errOnPartialSuccess - {
+      val deps = Agg(ivy"com.lihaoyi::pprint:0.5.3", ivy"fake::fake:fake")
+      val Failure(errMsg) = evalDeps(deps)
+      assert(errMsg.contains("fake"))
+    }
+  }
+}