Update for Metals v0.5 (#77)

* Update for Metals Tin release
* Update Scala version
* Update server flags
* Update atom-package-deps
* Update atom-languageclient
* Update Metals version
* Update Scala.js and enable Google Closure Compiler optimization

Author: laughedelic

build.sbt

@@ -21,7 +21,7 @@ developers := List(Developer(
   url("https://github.com/laughedelic")
 ))
 
-scalaVersion := "2.12.7"
+scalaVersion := "2.12.8"
 scalacOptions ++= Seq(
   "-encoding", "utf8",
   "-feature",
@@ -45,7 +45,10 @@ libraryDependencies ++= Seq(
   "laughedelic" %%% "scalajs-atom-api" % "0.6.0+7-0c17704c",
 )
 
-scalaJSLinkerConfig ~= { _.withSourceMap(true) }
+scalaJSLinkerConfig ~= {
+  _.withSourceMap(true)
+    .withESFeatures(_.withUseECMAScript2015(true)) 
+}
 
 lazy val getCoursier = taskKey[File]("Get coursier binary if missing")
 getCoursier := {
@@ -76,8 +79,8 @@ apmKeywords := Seq(
 apmEngines := Map("atom" -> ">=1.25.0 <2.0.0")
 
 apmDependencies := Map(
-  "atom-languageclient" -> "0.9.8",
-  "atom-package-deps" -> "4.6.2",
+  "atom-languageclient" -> "0.9.9",
+  "atom-package-deps" -> "5.0.0",
   "@atom/source-map-support" -> "0.3.4",
   "s-expression" -> "3.0.3",
   "minimatch" -> "3.0.4",

project/build.properties

@@ -1 +1 @@
-sbt.version=1.2.3
+sbt.version=1.2.8

project/plugins.sbt

@@ -1,4 +1,4 @@
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.25")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.28")
 addSbtPlugin("com.dwijnand" % "sbt-dynver" % "3.1.0")
 addSbtPlugin("ohnosequences" % "sbt-github-release" % "0.7.0")
 addSbtPlugin("laughedelic" % "sbt-atom-package" % "0.1.2")

src/main/scala/servers/Metals.scala

@@ -26,7 +26,7 @@ class HtmlView(title: String) extends js.Object {
 object Metals extends ScalaLanguageServer { server =>
   val name: String = "metals"
   val description: String = "Metals"
-  val defaultVersion: String = "0.3.1"
+  val defaultVersion: String = "0.5.2"
 
   def trigger(projectPath: String): Boolean = {
     (projectPath / ".metals").isDirectory
@@ -39,12 +39,14 @@ object Metals extends ScalaLanguageServer { server =>
 
   override def javaExtraArgs(projectPath: String): Seq[String] =
     Config.metals.javaArgs.get.toSeq ++ Seq(
+      "-Dmetals.extensions=true",
       "-Dmetals.slow-task=status-bar",
       "-Dmetals.status-bar=on",
-      "-Dmetals.file-watcher=custom",
-      "-Dmetals.extensions=true",
-      "-Dmetals.icons=atom",
       "-Dmetals.execute-client-command=on",
+      "-Dmetals.icons=atom",
+      "-Dmetals.signature-help-command='signature-help:view'",
+      "-Dmetals.completion.command='autocomplete-plus:activate'",
+      // "-Dmetals.override-def-format=unicode",
     )
 
   def coursierArgs(projectPath: String): Seq[String] = Seq(
@@ -58,6 +60,9 @@ object Metals extends ScalaLanguageServer { server =>
     "build-connect" -> "Connect to build server",
     "sources-scan" -> "Rescan sources",
     "doctor-run" -> "Run doctor",
+    "compile-cascade" -> "Cascade compile",
+    "compile-cancel" -> "Cancel compilation",
+    "bsp-switch" -> "Switch build server",
   )
 
   lazy val doctorView = new HtmlView("Metals Doctor")
@@ -151,8 +156,7 @@ object MetalsConfig extends ConfigSchema {
       "-XX:+UseG1GC",
       "-XX:+UseStringDeduplication",
       "-Xss4m",
-      "-Xms1G",
-      "-Xmx4G",
+      "-Xms100m",
     )
   )