Add source map support

Author: mprevel

examples/build.sbt

@@ -26,12 +26,28 @@ lazy val exampleApp = project.in(file("app"))
     scalaJSUseMainModuleInitializer in Test := false,
     relativeSourceMaps := true,
     skip in packageJSDependencies := false,
+
+    // you can customize and have a static output name for lib and dependencies
+    // instead of having the default files names like app-fastopt.js, ...
+    artifactPath in (Compile, fastOptJS) := {
+      (crossTarget in fastOptJS).value / "main.js"
+    },
+    artifactPath in (Compile, fullOptJS) := {
+      (crossTarget in fullOptJS).value / "main.js"
+    },
+    artifactPath in (Compile, packageJSDependencies) := {
+      (crossTarget in packageJSDependencies).value / "dependencies.js"
+    },
+    artifactPath in (Compile, packageMinifiedJSDependencies) := {
+      (crossTarget in packageMinifiedJSDependencies).value / "dependencies.js"
+    },
+
     chromeManifest := new AppManifest {
       val name = Keys.name.value
       val version = Keys.version.value
       val app = App(
         background = Background(
-          scripts = Chrome.defaultScripts
+          scripts = List("main.js", "dependencies.js")
         )
       )
       override val defaultLocale = Some("en")
@@ -71,9 +87,25 @@ lazy val extension = project.in(file("extension"))
     scalaJSUseMainModuleInitializer in Test := false,
     relativeSourceMaps := true,
     skip in packageJSDependencies := false,
+
+    // you can customize and have a static output name for lib and dependencies
+    // instead of having the default files names like extension-fastopt.js, ...
+    artifactPath in (Compile, fastOptJS) := {
+      (crossTarget in fastOptJS).value / "main.js"
+    },
+    artifactPath in (Compile, fullOptJS) := {
+      (crossTarget in fullOptJS).value / "main.js"
+    },
+    artifactPath in (Compile, packageJSDependencies) := {
+      (crossTarget in packageJSDependencies).value / "dependencies.js"
+    },
+    artifactPath in (Compile, packageMinifiedJSDependencies) := {
+      (crossTarget in packageMinifiedJSDependencies).value / "dependencies.js"
+    },
+
     chromeManifest := new ExtensionManifest {
       val background = Background(
-        scripts = Chrome.defaultScripts
+        scripts = List("main.js", "dependencies.js")
       )
       val name = Keys.name.value
       val version = Keys.version.value

sbt-plugin/src/main/scala/net/lullabyte/Chrome.scala

@@ -7,9 +7,7 @@ import sbt._
 
 object Chrome {
 
-  val mainFileName = "main.js"
-  val dependenciesFileName = "dependencies.js"
-  val defaultScripts = List(dependenciesFileName, mainFileName)
+  val manifestFileName = "manifest.json"
 
   def i18n(msg: String): String = s"__MSG_${msg}__"
 
@@ -20,16 +18,34 @@ object Chrome {
   }
 
   def buildUnpackedDirectory(unpacked: File)(manifest: File, jsLib: File,
-                                             jsDeps: File, resources: Seq[File]): File =  {
+                                             jsDeps: File, resources: Seq[File]): File = {
+
+    val libsAndDependencies = List(
+      jsLib -> unpacked / jsLib.getName,
+      jsDeps -> unpacked / jsDeps.getName
+    )
+
+    val sourceMaps = List(jsLib, jsDeps) map { sourceFile =>
+      val fileName = sourceFile.getName + ".map"
+      val originalSourceMap = sourceFile.getParentFile / fileName
+      originalSourceMap -> unpacked / fileName
+    } filter (_._1.exists())
+
+    val chromeSpecific = List(
+      manifest -> unpacked / manifestFileName
+    )
+
     IO.createDirectory(unpacked)
+
     resources.foreach { resource =>
       IO.copyDirectory(resource, unpacked, overwrite = true, preserveLastModified = true)
     }
-    IO.copy(List(
-      (jsLib, unpacked / mainFileName),
-      (jsDeps, unpacked / dependenciesFileName),
-      (manifest, unpacked / "manifest.json")
-    ), overwrite = true, preserveLastModified = true, preserveExecutable = true)
+
+    IO.copy(
+      libsAndDependencies ::: sourceMaps ::: chromeSpecific,
+      overwrite = true, preserveLastModified = true, preserveExecutable = true
+    )
+
     unpacked
   }
 

sbt-plugin/src/main/scala/net/lullabyte/ChromeSbtPlugin.scala

@@ -20,11 +20,12 @@ object ChromeSbtPlugin extends AutoPlugin {
     val fullOptJsLib = TaskKey[Attributed[File]]("fullOptJsLib")
     val fastOptJsLib = TaskKey[Attributed[File]]("fastOptJsLib")
 
+    private val chromeDir = "chrome"
 
     lazy val baseSettings: Seq[Def.Setting[_]] = Seq(
       fastOptJsLib := (fastOptJS in Compile).value,
       chromeUnpackedFast := {
-        Chrome.buildUnpackedDirectory(target.value / "chrome" / "unpacked-fast")(
+        Chrome.buildUnpackedDirectory(target.value / chromeDir / "unpacked-fast")(
           (chromeGenerateManifest in Compile).value,
           fastOptJsLib.value.data,
           (packageJSDependencies in Compile).value,
@@ -33,15 +34,15 @@ object ChromeSbtPlugin extends AutoPlugin {
       },
       fullOptJsLib := (fullOptJS in Compile).value,
       chromeUnpackedOpt := {
-        Chrome.buildUnpackedDirectory(target.value / "chrome" / "unpacked-opt")(
+        Chrome.buildUnpackedDirectory(target.value / chromeDir / "unpacked-opt")(
           (chromeGenerateManifest in Compile).value,
           fullOptJsLib.value.data,
           (packageMinifiedJSDependencies in Compile).value,
           (resourceDirectories in Compile).value
         )
       },
       chromePackage := {
-        val out = target.value / "chrome"
+        val out = target.value / chromeDir
         val chromeAppDir = chromeUnpackedOpt.value
         val zipFile = new File(out, s"${name.value}.zip")
         val excludeFileNames = Set(
@@ -52,7 +53,7 @@ object ChromeSbtPlugin extends AutoPlugin {
         zipFile
       },
       chromeGenerateManifest := {
-        Chrome.generateManifest(target.value / "chrome" / "generated_manifest.json")(
+        Chrome.generateManifest(target.value / chromeDir / "generated_manifest.json")(
           (chromeManifest in Compile).value
         )
       }