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package com.lihaoyi.workbench
import scala.concurrent.ExecutionContext.Implicits.global
import sbt._
import sbt.Keys._
import autowire._
import org.scalajs.sbtplugin.ScalaJSPlugin
import org.scalajs.core.tools.io._
import org.scalajs.sbtplugin.ScalaJSPluginInternal._
import org.scalajs.sbtplugin.Implicits._
object WorkbenchSplicePlugin extends AutoPlugin {
override def requires = WorkbenchPlugin
object autoImport {
val updatedJS = taskKey[List[String]]("Provides the addresses of the JS files that have changed")
val spliceBrowsers = taskKey[Unit]("Attempts to do a live update of the code running in the browser while maintaining state")
}
import autoImport._
import WorkbenchBasePlugin.autoImport._
import WorkbenchBasePlugin.server
import ScalaJSPlugin.AutoImport._
val spliceSettings = Seq(
updatedJS := {
var files: List[String] = Nil
((crossTarget in Compile).value * "*.js").get.foreach {
(x: File) =>
streams.value.log.info("workbench: Checking " + x.getName)
FileFunction.cached(streams.value.cacheDirectory / x.getName, FilesInfo.lastModified, FilesInfo.lastModified) {
(f: Set[File]) =>
val fsPath = f.head.getAbsolutePath.drop(new File("").getAbsolutePath.length)
files = fsPath :: files
f
}(Set(x))
}
files
},
updatedJS := {
val paths = updatedJS.value
val url = localUrl.value
paths.map { path =>
s"http://${url._1}:${url._2}$path"
}
},
spliceBrowsers := {
val changed = updatedJS.value
// There is no point in clearing the browser if no js files have changed.
if (changed.length > 0) {
for{
path <- changed
if !path.endsWith(".js.js")
}{
streams.value.log.info("workbench: Splicing " + path)
val url = localUrl.value
val prefix = s"http://${url._1}:${url._2}/"
val s = munge(sbt.IO.read(new sbt.File(path.drop(prefix.length))))
sbt.IO.write(new sbt.File(path.drop(prefix.length) + ".js"), s.getBytes)
server.value.Wire[Api].run(path + ".js").call()
}
}
},
spliceBrowsers <<= spliceBrowsers.triggeredBy(fastOptJS in Compile)
)
override def projectSettings = spliceSettings
def munge(s0: String) = {
var s = s0
s = s.replace("\nvar ScalaJS = ", "\nvar ScalaJS = ScalaJS || ")
s = s.replaceAll(
"\n(ScalaJS\\.c\\.[a-zA-Z_$0-9]+\\.prototype) = (.*?\n)",
"""
|$1 = $1 || {}
|(function(){
| var newProto = $2
| for (var attrname in newProto) { $1[attrname] = newProto[attrname]; }
|})()
|""".stripMargin
)
for(char <- Seq("d", "c", "h", "i", "n", "m")){
s = s.replaceAll("\n(ScalaJS\\." + char + "\\.[a-zA-Z_$0-9]+) = ", "\n$1 = $1 || ")
}
s
}
}
|
