aqua/project/BundleJS.scala

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import sbt.*
import sbt.Keys.*
import org.scalajs.linker.interface.Report
import org.scalajs.sbtplugin.ScalaJSPlugin.autoImport.*
/**
* Utility to add bundling js functionality to a project.
*/
object BundleJS {
// Bundle full js (result of fullLinkJS)
val fullBundleJS = taskKey[Unit]("Full bundle JS")
// Bundle fast js (result of fastLinkJS)
val fastBundleJS = taskKey[Unit]("Fast bundle JS")
/**
* Add full/fast bundle JS tasks to a project.
*
* @param outputFilePath **relative to baseDirectory** path to output file
* @return Seq of settings with tasks
*/
def addBundleJS(
outputFilePath: String // TODO: Accept `File`
) = Seq(
fullBundleJS := Def.taskDyn {
bundleJS(fullLinkJS, outputFilePath)
}.value,
fastBundleJS := Def.taskDyn {
bundleJS(fastLinkJS, outputFilePath)
}.value
)
private def bundleJS(
linkJSTask: TaskKey[Attributed[Report]],
outputFilePath: String
) = Def.taskDyn {
val logger = streams.value.log
val jsDir = (Compile / linkJSTask / scalaJSLinkerOutputDirectory).value
val linkResult = (Compile / linkJSTask).value
val outputFile = baseDirectory.value / outputFilePath
linkResult.data.publicModules.toList match {
case Nil =>
throw new RuntimeException("No public modules generated")
case _ :: _ :: _ =>
throw new RuntimeException("More than one public module generated")
case module :: Nil =>
val jsFile = jsDir / module.jsFileName
Def.task {
logger.info(s"Copying $jsFile to $outputFile")
IO.copyFile(jsFile, outputFile)
}
}
}
}