Merge pull request #25 from VirtusLab/es-version

Add support for parsing es version

Author: lwronski

Diff for: cli/src/org/scalajs/cli/Scalajsld.scala

@@ -26,7 +26,7 @@ import java.io.File
 import java.net.URI
 import java.nio.file.Path
 import java.lang.NoClassDefFoundError
-import org.scalajs.cli.internal.ModuleSplitStyleParser
+import org.scalajs.cli.internal.{EsVersionParser, ModuleSplitStyleParser}
 
 object Scalajsld {
 
@@ -153,6 +153,9 @@ object Scalajsld {
       opt[Unit]("es2015")
         .action { (_, c) => c.copy(esFeatures = c.esFeatures.withESVersion(ESVersion.ES2015)) }
         .text("Use ECMAScript 2015")
+      opt[String]("esVersion")
+        .action { (esV, c) => c.copy(esFeatures = c.esFeatures.withESVersion(EsVersionParser.parse(esV))) }
+        .text("EsVersion " + EsVersionParser.All.mkString("(", ", ", ")"))
       opt[ModuleKind]('k', "moduleKind")
         .action { (kind, c) => c.copy(moduleKind = kind) }
         .text("Module kind " + ModuleKind.All.mkString("(", ", ", ")"))

Diff for: cli/src/org/scalajs/cli/internal/EsVersionParser.scala

@@ -0,0 +1,23 @@
+package org.scalajs.cli.internal
+
+import org.scalajs.linker.interface.ESVersion
+
+import java.util.Locale
+
+object EsVersionParser {
+  def parse(esVersion: String): ESVersion =
+    esVersion.trim.toLowerCase(Locale.ROOT) match {
+        case "es5_1" => ESVersion.ES5_1
+        case "es2015" => ESVersion.ES2015
+        case "es2016" => ESVersion.ES2016
+        case "es2017" => ESVersion.ES2017
+        case "es2018" => ESVersion.ES2018
+        case "es2019" => ESVersion.ES2019
+        case "es2020" => ESVersion.ES2020
+        case "es2021" => ESVersion.ES2021
+        case unknown => throw new IllegalArgumentException(s"Warning: unrecognized argument: $unknown for --esVersion parameter")
+      }
+
+  val All: List[ESVersion] =
+    List(ESVersion.ES5_1, ESVersion.ES2015, ESVersion.ES2016, ESVersion.ES2017, ESVersion.ES2018, ESVersion.ES2019, ESVersion.ES2020, ESVersion.ES2021)
+}