Merge remote-tracking branch 'dotty/master' into call-graph-wip-1

Author: nicolasstucki

.drone.yml

@@ -11,12 +11,24 @@ pipeline:
     image: lampepfl/dotty:24-04-2017
     pull: true
     commands:
-      - ln -s /var/cache/drone/ivy2 "$HOME/.ivy2"
-      - sbt -J-Xmx4096m -J-XX:ReservedCodeCacheSize=512m -J-XX:MaxMetaspaceSize=1024m -Ddotty.drone.mem=4096m "${CI_TEST}"
+      - ./project/scripts/sbt "${CI_TEST}"
     when:
       branch:
         exclude: gh-pages
 
+  publish_nightly:
+    image: lampepfl/dotty:24-04-2017
+    pull: true
+    commands:
+      - ./project/scripts/sbt ";clean ;publishLocal" "${CI_PUBLISH}"
+      - ./project/scripts/sbt "sbt-dotty/scripted source-dependencies/*" "${CI_PUBLISH}"
+      - ./project/scripts/sbtPublish ${CI_PUBLISH} $SONATYPE_USER $SONATYPE_PW $PGP_PW
+    volumes:
+      - /home/drone/keys:/keys
+    when:
+      event: deployment
+      environment: nightly
+
   documentation:
     image: lampepfl/dotty:24-04-2017
     pull: true
@@ -38,7 +50,7 @@ matrix:
       CI_PUBLISH: true
     - CI_TEST: legacyTests
       CI_PUBLISH: false
-    - CI_TEST: ;test;sbt-dotty/scripted
+    - CI_TEST: ;test;sbt-dotty/scripted compilerReporter/*;sbt-dotty/scripted discovery/*;sbt-dotty/scripted sbt-dotty/*
       CI_PUBLISH: false
     - CI_TEST: dotty-bootstrapped/test
       CI_PUBLISH: false

.drone.yml.sig

@@ -1 +1 @@
-eyJhbGciOiJIUzI1NiJ9.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.Ib2LCIvmphRVXRKdsgpf8MiRlNwZmtE7d0dRv7u_aMo
+eyJhbGciOiJIUzI1NiJ9.IyBBZnRlciB1cGRhdGluZyB0aGlzIGZpbGUsIHlvdSBuZWVkIHRvIHJlLXNpZ24gaXQ6CiMKIyAtIEluc3RhbGwgW2Ryb25lLWNsaV0oaHR0cDovL3JlYWRtZS5kcm9uZS5pby91c2FnZS9nZXR0aW5nLXN0YXJ0ZWQtY2xpLykKIyAtIENvcHkgeW91ciB0b2tlbiBmcm9tICBodHRwOi8vZG90dHktY2kuZXBmbC5jaC9hY2NvdW50IChDbGljayBTSE9XIFRPS0VOKQojIC0gKGV4cG9ydCBEUk9ORV9UT0tFTj15b3VyLXRva2VuOyBleHBvcnQgRFJPTkVfU0VSVkVSPWh0dHA6Ly9kb3R0eS1jaS5lcGZsLmNoOyBkcm9uZSBzaWduIGxhbXBlcGZsL2RvdHR5KQojCiMgUGxlYXNlIG5vdGUgdGhhdCB0aGUgc2lnbmluZyBjYW4gb25seSBiZSBkb25lIGJ5IGNvbGxhYm9yYXRvcnMuCgpwaXBlbGluZToKICB0ZXN0OgogICAgaW1hZ2U6IGxhbXBlcGZsL2RvdHR5OjI0LTA0LTIwMTcKICAgIHB1bGw6IHRydWUKICAgIGNvbW1hbmRzOgogICAgICAtIC4vcHJvamVjdC9zY3JpcHRzL3NidCAiJHtDSV9URVNUfSIKICAgIHdoZW46CiAgICAgIGJyYW5jaDoKICAgICAgICBleGNsdWRlOiBnaC1wYWdlcwoKICBwdWJsaXNoX25pZ2h0bHk6CiAgICBpbWFnZTogbGFtcGVwZmwvZG90dHk6MjQtMDQtMjAxNwogICAgcHVsbDogdHJ1ZQogICAgY29tbWFuZHM6CiAgICAgIC0gLi9wcm9qZWN0L3NjcmlwdHMvc2J0ICI7Y2xlYW4gO3B1Ymxpc2hMb2NhbCIgIiR7Q0lfUFVCTElTSH0iCiAgICAgIC0gLi9wcm9qZWN0L3NjcmlwdHMvc2J0ICJzYnQtZG90dHkvc2NyaXB0ZWQgc291cmNlLWRlcGVuZGVuY2llcy8qIiAiJHtDSV9QVUJMSVNIfSIKICAgICAgLSAuL3Byb2plY3Qvc2NyaXB0cy9zYnRQdWJsaXNoICR7Q0lfUFVCTElTSH0gJFNPTkFUWVBFX1VTRVIgJFNPTkFUWVBFX1BXICRQR1BfUFcKICAgIHZvbHVtZXM6CiAgICAgIC0gL2hvbWUvZHJvbmUva2V5czova2V5cwogICAgd2hlbjoKICAgICAgZXZlbnQ6IGRlcGxveW1lbnQKICAgICAgZW52aXJvbm1lbnQ6IG5pZ2h0bHkKCiAgZG9jdW1lbnRhdGlvbjoKICAgIGltYWdlOiBsYW1wZXBmbC9kb3R0eToyNC0wNC0yMDE3CiAgICBwdWxsOiB0cnVlCiAgICBjb21tYW5kczoKICAgICAgLSAuL3Byb2plY3Qvc2NyaXB0cy9nZW5Eb2NzICIke0NJX1BVQkxJU0h9IiAkQk9UX1BBU1MKICAgIHdoZW46CiAgICAgIGJyYW5jaDogbWFzdGVyCgogIHNsYWNrOgogICAgaW1hZ2U6IHBsdWdpbnMvc2xhY2sKICAgIGNoYW5uZWw6IGRvdHR5CiAgICB3aGVuOgogICAgICBicmFuY2g6IG1hc3RlcgogICAgICBzdGF0dXM6IGNoYW5nZWQKCm1hdHJpeDoKICBpbmNsdWRlOgogICAgLSBDSV9URVNUOiBkb3R0eS1iaW4tdGVzdHMvdGVzdAogICAgICBDSV9QVUJMSVNIOiB0cnVlCiAgICAtIENJX1RFU1Q6IGxlZ2FjeVRlc3RzCiAgICAgIENJX1BVQkxJU0g6IGZhbHNlCiAgICAtIENJX1RFU1Q6IDt0ZXN0O3NidC1kb3R0eS9zY3JpcHRlZCBjb21waWxlclJlcG9ydGVyLyo7c2J0LWRvdHR5L3NjcmlwdGVkIGRpc2NvdmVyeS8qO3NidC1kb3R0eS9zY3JpcHRlZCBzYnQtZG90dHkvKgogICAgICBDSV9QVUJMSVNIOiBmYWxzZQogICAgLSBDSV9URVNUOiBkb3R0eS1ib290c3RyYXBwZWQvdGVzdAogICAgICBDSV9QVUJMSVNIOiBmYWxzZQo.jkK92hXwTlQ5DGTdeZfSCcyYC-cQT_5bYb6Qa0O-M5o

.gitignore

@@ -17,6 +17,9 @@ project/local-plugins.sbt
 .ensime
 .ensime_cache/
 
+# npm
+node_modules
+
 # Scala-IDE specific
 .scala_dependencies
 .cache
@@ -28,6 +31,11 @@ project/local-plugins.sbt
 classes/
 */bin/
 
+# Dotty IDE
+/.dotty-ide-dev-port
+/.dotty-ide-artifact
+/.dotty-ide.json
+
 # idea
 .idea
 .idea_modules

CONTRIBUTING.md renamed to CONTRIBUTING

@@ -1,6 +1,7 @@
 Dotty
 =====
 [![Build Status](http://dotty-ci.epfl.ch/api/badges/lampepfl/dotty/status.svg)](http://dotty-ci.epfl.ch/lampepfl/dotty)
+[![Community Build Status](https://travis-ci.org/lampepfl/dotty-community-build.svg?branch=master)](https://travis-ci.org/lampepfl/dotty-community-build)
 [![Join the chat at https://gitter.im/lampepfl/dotty](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/lampepfl/dotty?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 * [Homepage](http://dotty.epfl.ch)

README.md

@@ -115,6 +115,11 @@ else
         echo "Failed to parse .packages file"
         build_all
     fi
+
+    if [ ! -f "$INTERFACES_JAR" -o ! -f "$MAIN_JAR" -o ! -f "$DOTTY_LIB_JAR" -o ! -f "$TEST_JAR" ]; then
+        echo ".packages file corrupted, rebuilding"
+        build_all
+    fi
 fi
 
 ################# After this point, jar variables will be set #################
@@ -142,10 +147,6 @@ if [ "$SCALA_LIBRARY_JAR" == "" ]; then
     SCALA_LIBRARY_JAR=$(find_jar "$HOME/.ivy2/cache/org.scala-lang/scala-library/jars" "scala-library-$SCALA_VERSION.jar")
 fi
 
-if [ "$SCALA_REFLECT_JAR" == "" ]; then
-    SCALA_REFLECT_JAR=$(find_jar "$HOME/.ivy2/cache/org.scala-lang/scala-reflect/jars" "scala-reflect-$SCALA_VERSION.jar")
-fi
-
 if [ "$SCALA_ASM_JAR" == "" ]; then
     SCALA_ASM_JAR=$(find_jar "$HOME/.ivy2/cache/org.scala-lang.modules/scala-asm/bundles" "scala-asm-$SCALA_ASM_VERSION.jar")
 fi

bin/common

@@ -20,11 +20,10 @@ CompilerMain=dotty.tools.dotc.Main
 FromTasty=dotty.tools.dotc.FromTasty
 ReplMain=dotty.tools.dotc.repl.Main
 
-if [ ! -f "$SCALA_LIBRARY_JAR" -o ! -f "$SCALA_REFLECT_JAR"  -o ! -f "$SCALA_ASM_JAR" -o ! -f "$SBT_INTERFACE_JAR" ]
+if [ ! -f "$SCALA_LIBRARY_JAR" -o ! -f "$SCALA_ASM_JAR" -o ! -f "$SBT_INTERFACE_JAR" ]
 then
   echo To use this script please set
   echo SCALA_LIBRARY_JAR to point to scala-library-$SCALA_VERSION.jar "(currently $SCALA_LIBRARY_JAR)"
-  echo SCALA_REFLECT_JAR to point to scala-reflect-$SCALA_VERSION.jar "(currently $SCALA_REFLECT_JAR)"
   echo SCALA_ASM_JAR to point to scala-asm-$SCALA_ASM_VERSION.jar "(currently $SCALA_ASM_JAR)"
   echo SBT_INTERFACE_JAR to point to interface-$SBT_VERSION.jar "(currently $SBT_INTERFACE_JAR)"
 fi
@@ -116,9 +115,9 @@ trap onExit INT
 classpathArgs () {
   if [[ "true" == "$bootstrapped" ]]; then
     check_jar "dotty-bootstrapped" "$DOTTY_JAR" "target" 'build_jar "test:runMain dotc.build" target' &> /dev/null
-    toolchain="$DOTTY_JAR:$DOTTY_LIB_JAR:$SCALA_LIBRARY_JAR:$SCALA_REFLECT_JAR:$SCALA_ASM_JAR:$SBT_INTERFACE_JAR"
+    toolchain="$DOTTY_JAR:$DOTTY_LIB_JAR:$SCALA_LIBRARY_JAR:$SCALA_ASM_JAR:$SBT_INTERFACE_JAR"
   else
-    toolchain="$SCALA_LIBRARY_JAR:$DOTTY_LIB_JAR:$SCALA_REFLECT_JAR:$SCALA_ASM_JAR:$SBT_INTERFACE_JAR"
+    toolchain="$SCALA_LIBRARY_JAR:$DOTTY_LIB_JAR:$SCALA_ASM_JAR:$SBT_INTERFACE_JAR"
   fi
   bcpJars="$INTERFACES_JAR:$MAIN_JAR:$DOTTY_LIB_JAR"
   cpJars="$INTERFACES_JAR:$MAIN_JAR:$DOTTY_LIB_JAR:$TEST_JAR"

bin/dotc

@@ -17,9 +17,8 @@ class TestScripts {
 
   private def executeScript(script: String): (Int, String) = {
     val sb = new StringBuilder
-    val ret = Process(script) ! ProcessLogger { line => println(line); sb.append(line) }
+    val ret = Process(script) ! ProcessLogger { line => println(line); sb.append(line + "\n") }
     val output = sb.toString
-    println(output) // For CI, otherwise "terminal inactive for 5m0s, build cancelled"
     (ret, output)
   }
 
@@ -59,7 +58,7 @@ class TestScripts {
 
     val (retDotr, dotrOutput) = executeScript("./bin/dotr HelloWorld")
     assert(
-      retDotr == 0 && dotrOutput == "hello world",
+      retDotr == 0 && dotrOutput == "hello world\n",
       s"Running hello world exited with status: $retDotr and output: $dotrOutput"
     )
   }
@@ -93,8 +92,19 @@ class TestScripts {
 
   /** dotc script should work after corrupting .packages */
   @Test def reCreatesPackagesIfNecessary = doUnlessWindows {
-    executeScript("sed -i.old 's/2.1/2.X/' ./.packages") // That's going to replace 2.11 with 2.X1
-    val (retFirstBuild, _) = executeScript("./bin/dotc ./tests/pos/HelloWorld.scala")
+    import java.nio.file.{Paths, Files}
+    import java.nio.charset.StandardCharsets
+    val contents =
+      """|/Users/fixel/Projects/dotty/interfaces/target/dotty-interfaces-0.1.1-bin-SNAPSHOT-X.jar
+         |/Users/fixel/Projects/dotty/compiler/target/scala-2.11/dotty-compiler_2.1X-0.1.1-bin-SNAPSHOT.jar
+         |/Users/fixel/Projects/dotty/library/target/scala-2.11/dotty-library_2.1X-0.1.1-bin-SNAPSHOT.jar
+         |/Users/fixel/Projects/dotty/doc-tool/target/scala-2.11/dotty-doc_2.1X-0.1.1-bin-SNAPSHOT-tests.jar"""
+      .stripMargin
+
+    Files.write(Paths.get("./.packages"), contents.getBytes(StandardCharsets.UTF_8))
+
+    val (retFirstBuild, output) = executeScript("./bin/dotc ./tests/pos/HelloWorld.scala")
+    assert(output.contains(".packages file corrupted"))
     assert(retFirstBuild == 0, "building dotc failed")
   }
 }

bin/test/TestScripts.scala

@@ -11,14 +11,16 @@ val `dotty-library` = Build.`dotty-library`
 val `dotty-library-bootstrapped` = Build.`dotty-library-bootstrapped`
 val `dotty-sbt-bridge` = Build.`dotty-sbt-bridge`
 val `dotty-sbt-bridge-bootstrapped` = Build.`dotty-sbt-bridge-bootstrapped`
-val `dotty-sbt-scripted-tests` = Build.`dotty-sbt-scripted-tests`
+val `dotty-language-server` = Build.`dotty-language-server`
 val sjsSandbox = Build.sjsSandbox
 val `dotty-bench` = Build.`dotty-bench`
 val `scala-library` = Build.`scala-library`
 val `scala-compiler` = Build.`scala-compiler`
 val `scala-reflect` = Build.`scala-reflect`
 val scalap = Build.scalap
+val dist = Build.dist
 
 val `sbt-dotty` = Build.`sbt-dotty`
+val `vscode-dotty` = Build.`vscode-dotty`
 
 inThisBuild(Build.thisBuildSettings)

build.sbt

@@ -182,7 +182,7 @@ class JSCodeGen()(implicit ctx: Context) {
 
   private def getFileFor(cunit: CompilationUnit, sym: Symbol,
       suffix: String) = {
-    import scala.reflect.io._
+    import dotty.tools.io._
 
     val outputDirectory: AbstractFile = // TODO Support virtual files
       new PlainDirectory(new Directory(new java.io.File(ctx.settings.d.value)))

compiler/sjs/backend/sjs/JSCodeGen.scala

@@ -15,7 +15,7 @@ import java.io.{File => JFile}
 import scala.collection.generic.Clearable
 import scala.collection.mutable
 import scala.reflect.ClassTag
-import scala.reflect.io.{Directory, PlainDirectory, AbstractFile}
+import dotty.tools.io.{Directory, PlainDirectory, AbstractFile}
 import scala.tools.asm.{ClassVisitor, FieldVisitor, MethodVisitor}
 import scala.tools.nsc.backend.jvm.{BCodeHelpers, BackendInterface}
 import dotty.tools.dotc.core._

compiler/src/dotty/tools/backend/jvm/CollectEntryPoints.scala

@@ -12,7 +12,7 @@ import scala.collection.generic.Clearable
 import scala.collection.mutable
 import scala.reflect.ClassTag
 import scala.reflect.internal.util.WeakHashSet
-import scala.reflect.io.{AbstractFile, Directory, PlainDirectory}
+import dotty.tools.io.{AbstractFile, Directory, PlainDirectory}
 import scala.tools.asm.{AnnotationVisitor, ClassVisitor, FieldVisitor, MethodVisitor}
 import scala.tools.nsc.backend.jvm.{BCodeHelpers, BackendInterface}
 import dotty.tools.dotc.core._

compiler/src/dotty/tools/backend/jvm/DottyBackendInterface.scala

@@ -25,15 +25,15 @@ import Symbols._
 import Denotations._
 import Phases._
 import java.lang.AssertionError
-import java.io.{FileOutputStream, File => JFile}
+import java.io.{DataOutputStream, File => JFile}
 
 import scala.tools.asm
 import scala.tools.asm.tree._
 import dotty.tools.dotc.util.{DotClass, Positions}
 import tpd._
 import StdNames._
 
-import scala.reflect.io.{AbstractFile, Directory, PlainDirectory}
+import dotty.tools.io.{AbstractFile, Directory, PlainDirectory}
 
 class GenBCode extends Phase {
   def phaseName: String = "genBCode"
@@ -62,10 +62,10 @@ class GenBCodePipeline(val entryPoints: List[Symbol], val int: DottyBackendInter
 
   val sourceFile = ctx.compilationUnit.source
 
-  /** Convert a `scala.reflect.io.AbstractFile` into a
+  /** Convert a `dotty.tools.io.AbstractFile` into a
    *  `dotty.tools.dotc.interfaces.AbstractFile`.
    */
-  private[this] def convertAbstractFile(absfile: scala.reflect.io.AbstractFile): interfaces.AbstractFile =
+  private[this] def convertAbstractFile(absfile: dotty.tools.io.AbstractFile): interfaces.AbstractFile =
     new interfaces.AbstractFile {
       override def name = absfile.name
       override def path = absfile.path
@@ -206,12 +206,16 @@ class GenBCodePipeline(val entryPoints: List[Symbol], val int: DottyBackendInter
             val dataAttr = new CustomAttr(nme.TASTYATTR.mangledString, binary)
             val store = if (mirrorC ne null) mirrorC else plainC
             store.visitAttribute(dataAttr)
+            val outTastyFile = getFileForClassfile(outF, store.name, ".tasty")
             if (ctx.settings.emitTasty.value) {
-              val outTastyFile = getFileForClassfile(outF, store.name, ".tasty").file
-              val fos = new FileOutputStream(outTastyFile, false)
-              fos.write(binary)
-              fos.close()
-
+              val outstream = new DataOutputStream(outTastyFile.bufferedOutput)
+
+              try outstream.write(binary)
+              finally outstream.close()
+            } else if (!outTastyFile.isVirtual) {
+              // Create an empty file to signal that a tasty section exist in the corresponding .class
+              // This is much cheaper and simpler to check than doing classfile parsing
+              outTastyFile.create()
             }
           }
 

compiler/src/dotty/tools/backend/jvm/GenBCode.scala

@@ -16,7 +16,7 @@ import scala.collection.generic.Clearable
 import scala.collection.mutable
 import scala.collection.mutable.{ListBuffer, ArrayBuffer}
 import scala.reflect.ClassTag
-import scala.reflect.io.{Directory, PlainDirectory, AbstractFile}
+import dotty.tools.io.{Directory, PlainDirectory, AbstractFile}
 import scala.tools.asm.{ClassVisitor, FieldVisitor, MethodVisitor}
 import scala.tools.nsc.backend.jvm.{BCodeHelpers, BackendInterface}
 import dotty.tools.dotc.core._

compiler/src/dotty/tools/backend/jvm/LabelDefs.scala

@@ -52,6 +52,7 @@ class Compiler {
       List(new FirstTransform,      // Some transformations to put trees into a canonical form
            new CheckReentrant),     // Internal use only: Check that compiled program has no data races involving global vars
       List(new CheckStatic,         // Check restrictions that apply to @static members
+           new CheckPhantomCast,    // Checks that no Phantom types in are in casts
            new ElimRepeated,        // Rewrite vararg parameters and arguments
            new RefChecks,           // Various checks mostly related to abstract members and overriding
            new NormalizeFlags,      // Rewrite some definition flags
@@ -135,7 +136,7 @@ class Compiler {
     val start = bootstrap.fresh
       .setOwner(defn.RootClass)
       .setTyper(new Typer)
-      .setMode(Mode.ImplicitsEnabled)
+      .addMode(Mode.ImplicitsEnabled)
       .setTyperState(new MutableTyperState(ctx.typerState, ctx.typerState.reporter, isCommittable = true))
       .setFreshNames(new FreshNameCreator.Default)
     ctx.initialize()(start) // re-initialize the base context with start

compiler/src/dotty/tools/dotc/Compiler.scala

@@ -83,17 +83,15 @@ object FromTasty extends Driver {
           case clsd: ClassDenotation =>
             clsd.infoOrCompleter match {
               case info: ClassfileLoader =>
-                info.load(clsd) match {
-                  case Some(unpickler: DottyUnpickler) =>
-                    val List(unpickled) = unpickler.body(ctx.addMode(Mode.ReadPositions))
+                info.load(clsd)
+                val unpickled = clsd.symbol.asClass.tree
+                if (unpickled != null) {
                     val unit1 = new CompilationUnit(new SourceFile(clsd.symbol.sourceFile, Seq()))
                     unit1.tpdTree = unpickled
-                    unit1.unpicklers += (clsd.classSymbol -> unpickler.unpickler)
                     force.traverse(unit1.tpdTree)
                     unit1
-                  case _ =>
+                } else
                     cannotUnpickle(s"its class file ${info.classfile} does not have a TASTY attribute")
-                }
               case info =>
                 cannotUnpickle(s"its info of type ${info.getClass} is not a ClassfileLoader")
             }

compiler/src/dotty/tools/dotc/FromTasty.scala

@@ -18,7 +18,7 @@ import java.io.{BufferedWriter, OutputStreamWriter}
 import printing.XprintMode
 
 import scala.annotation.tailrec
-import scala.reflect.io.VirtualFile
+import dotty.tools.io.VirtualFile
 import scala.util.control.NonFatal
 
 /** A compiler run. Exports various methods to compile source files */