Refactor a bunch of stuff

This helps prepare for WebappComponentsRunnerPlugin.

* Move webapp-runner version number to the outer build configuration
    * Use sbt-buildinfo to propagate it it to WarPackageRunnerPlugin
* Fork tests
* Move .war contents concatenation from WarPackagePlugin to
  WebappComponentsPlugin
* Prefix WarPackageRunnerPlugin keys with `war`
* Move WarPackageRunnerPlugin settings out of War configuration
* Flip webapp contents map from `src -> dest` to `dest -> src`

build.sbt

@@ -20,8 +20,20 @@ semanticdbEnabled := true
 semanticdbVersion := scalafixSemanticdb.revision
 scalacOptions += "-Ywarn-unused-import"
 
+// webapp-runner
+lazy val webappRunnerVersion =
+  settingKey[String]("webapp-runner version")
+webappRunnerVersion := "9.0.68.1"
+libraryDependencies += "com.heroku" % "webapp-runner" % webappRunnerVersion.value intransitive ()
+
+// sbt-buildinfo
+enablePlugins(BuildInfoPlugin)
+buildInfoKeys := Seq[BuildInfoKey](webappRunnerVersion)
+buildInfoPackage := "com.earldouglas.sbt.war"
+
 // Testing
 libraryDependencies += "org.scalatest" %% "scalatest" % "3.2.19" % "test"
+Test / fork := true
 
 // Publish to Sonatype, https://www.scala-sbt.org/release/docs/Using-Sonatype.html
 credentials := List(

project/plugins.sbt

@@ -2,3 +2,4 @@ libraryDependencies += "org.scala-sbt" %% "scripted-plugin" % sbtVersion.value
 addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.2.1")
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")
 addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.12.1")
+addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.12.0")

src/main/scala/com/earldouglas/sbt/war/WarPackagePlugin.scala

@@ -18,22 +18,14 @@ object WarPackagePlugin extends AutoPlugin {
 
   override def requires = WebappComponentsPlugin
 
-  val warContents: Initialize[Task[Seq[(File, String)]]] =
-    Def.task {
-
-      import WebappComponentsPlugin.autoImport._
-
-      WarPackage.getWarContents(
-        webappResources = webappResources.value,
-        webappClasses = webappClasses.value,
-        webappLib = webappLib.value
-      )
-    }
-
   override lazy val projectSettings: Seq[Setting[_]] = {
 
+    val packageContents: Initialize[Task[Seq[(java.io.File, String)]]] =
+      WebappComponentsPlugin.webappContents
+        .map(_.toSeq.map({ case (k, v) => (v, k) }))
+
     val packageTaskSettings: Seq[Setting[_]] =
-      Defaults.packageTaskSettings(pkg, warContents)
+      Defaults.packageTaskSettings(pkg, packageContents)
 
     val packageArtifactSetting: Setting[_] =
       pkg / artifact := Artifact(moduleName.value, "war", "war")

src/main/scala/com/earldouglas/sbt/war/WarPackageRunnerPlugin.scala

@@ -1,5 +1,6 @@
 package com.earldouglas.sbt.war
 
+import sbt.Def.Initialize
 import sbt.Def.settingKey
 import sbt.Def.taskKey
 import sbt.Keys._
@@ -16,10 +17,12 @@ object WarPackageRunnerPlugin extends AutoPlugin {
 
   object autoImport {
     lazy val War = config("war").hide
-    lazy val port = settingKey[Int]("container port")
-    lazy val start = taskKey[Unit]("start container")
-    lazy val join = taskKey[Option[Int]]("join container")
-    lazy val stop = taskKey[Unit]("stop container")
+    lazy val warPort = settingKey[Int]("container port")
+    lazy val warStart = taskKey[Unit]("start container")
+    lazy val warJoin = taskKey[Option[Int]]("join container")
+    lazy val warStop = taskKey[Unit]("stop container")
+    lazy val warForkOptions =
+      settingKey[ForkOptions]("container fork options")
     lazy val webappRunnerVersion =
       settingKey[String]("webapp-runner version")
   }
@@ -30,16 +33,16 @@ object WarPackageRunnerPlugin extends AutoPlugin {
   override val projectConfigurations: Seq[Configuration] = Seq(War)
 
   private lazy val containerInstance =
-    new AtomicReference[Option[ScalaProcess]](
-      Option.empty[ScalaProcess]
-    )
+    new AtomicReference[Option[ScalaProcess]](None)
 
-  private val startTask: Def.Initialize[Task[Unit]] =
+  private val startWar: Initialize[Task[Unit]] =
     Def.task {
+      stopContainerInstance()
+
       val runners: Seq[File] =
         Classpaths
           .managedJars(
-            configuration.value,
+            War,
             classpathTypes.value,
             update.value
           )
@@ -51,8 +54,8 @@ object WarPackageRunnerPlugin extends AutoPlugin {
           streams.value.log.info("[sbt-war] Starting server")
           val process: ScalaProcess =
             Fork.java.fork(
-              (War / forkOptions).value,
-              Seq("-jar", r.file.getPath(), (War / pkg).value.getPath())
+              warForkOptions.value,
+              Seq("-jar", r.file.getPath(), pkg.value.getPath())
             )
           containerInstance.set(Some(process))
         case _ :: _ =>
@@ -67,24 +70,22 @@ object WarPackageRunnerPlugin extends AutoPlugin {
       }
     }
 
-  private val joinTask: Def.Initialize[Task[Option[Int]]] =
+  private val joinWar: Initialize[Task[Option[Int]]] =
     Def.task {
       containerInstance.get.map { _.exitValue }
     }
 
   private def stopContainerInstance(): Unit = {
-    val oldProcess =
-      containerInstance
-        .getAndSet(Option.empty[ScalaProcess])
+    val oldProcess = containerInstance.getAndSet(None)
     oldProcess.foreach(_.destroy())
   }
 
-  private val stopTask: Def.Initialize[Task[Unit]] =
+  private val stopWar: Initialize[Task[Unit]] =
     Def.task {
       stopContainerInstance()
     }
 
-  private val onLoadSetting: Def.Initialize[State => State] =
+  private val onLoadSetting: Initialize[State => State] =
     Def.setting {
       (Global / onLoad).value compose { state: State =>
         state.addExitHook(stopContainerInstance())
@@ -93,20 +94,14 @@ object WarPackageRunnerPlugin extends AutoPlugin {
 
   override lazy val projectSettings =
     Seq(
-      inConfig(War)(
-        Seq(
-          port := 8080,
-          start := startTask.value,
-          join := joinTask.value,
-          stop := stopTask.value,
-          forkOptions := ForkOptions(),
-          webappRunnerVersion := "9.0.68.1"
-        )
-      ),
-      Seq(
-        Global / onLoad := onLoadSetting.value,
-        libraryDependencies +=
-          ("com.heroku" % "webapp-runner" % (War / webappRunnerVersion).value intransitive ()) % War
-      )
-    ).flatten
+      warPort := 8080,
+      warStart := startWar.value,
+      warJoin := joinWar.value,
+      warStop := stopWar.value,
+      warForkOptions := ForkOptions(),
+      webappRunnerVersion := BuildInfo.webappRunnerVersion,
+      Global / onLoad := onLoadSetting.value,
+      libraryDependencies +=
+        ("com.heroku" % "webapp-runner" % webappRunnerVersion.value intransitive ()) % War
+    )
 }

src/main/scala/com/earldouglas/sbt/war/WebappComponents.scala

@@ -17,15 +17,16 @@ object WebappComponents {
     * find all the files it contains.
     *
     * @return
-    *   a mapping from source to destination of webapp resources
+    *   a mapping from destination to source of webapp resources
     */
-  def getResources(resourcesDir: File): Map[File, String] = {
+  def getResources(resourcesDir: File): Map[String, File] = {
     (resourcesDir ** "*").get
+      .filter(_.exists())
       .filter(_.isFile())
-      .flatMap(src =>
+      .flatMap(file =>
         IO
-          .relativize(resourcesDir, src)
-          .map(dst => src -> dst)
+          .relativize(resourcesDir, file)
+          .map(path => path -> file)
       )
       .toMap
   }
@@ -34,38 +35,40 @@ object WebappComponents {
     * directories), traverse to find all the .class files.
     *
     * @return
-    *   a mapping from source to destination of .class files
+    *   a mapping from destination to source of .class files
     */
-  def getClasses(classpath: Seq[File]): Map[File, String] = {
+  def getClasses(classpath: Seq[File]): Map[String, File] = {
 
     val classpathDirs: Seq[File] =
       classpath
+        .filter(_.exists())
         .filter(_.isDirectory())
 
-    val classesMappings: Seq[(File, File)] =
+    val classesMappings: Seq[(String, File)] =
       for {
         classpathDir <- classpathDirs
         classFile <- (classpathDir ** "*").get
+        if classFile.exists()
         if classFile.isFile()
         relativeFile <- IO.relativizeFile(classpathDir, classFile)
-      } yield (classFile, relativeFile)
+        relativePath = s"WEB-INF/classes/${relativeFile.getPath()}"
+      } yield (relativePath, classFile)
 
-    classesMappings
-      .map({ case (src, dst) => src -> dst.getPath() })
-      .toMap
+    classesMappings.toMap
   }
 
   /** Given a classpath (potentially with both .jar files and classes
     * directories), traverse to find all the .jar files.
     *
     * @return
-    *   a mapping from source to destination of .jar files
+    *   a mapping from destination to source of .jar files
     */
-  def getLib(classpath: Seq[File]): Map[File, String] = {
+  def getLib(classpath: Seq[File]): Map[String, File] = {
     classpath
+      .filter(f => f.exists())
       .filter(f => f.isFile())
       .filter(f => f.getName().endsWith(".jar"))
-      .map(src => src -> src.getName())
+      .map(file => s"WEB-INF/lib/${file.getName()}" -> file)
       .toMap
   }
 }

src/main/scala/com/earldouglas/sbt/war/WebappComponentsPlugin.scala

@@ -14,13 +14,13 @@ object WebappComponentsPlugin extends AutoPlugin {
   object autoImport {
 
     lazy val webappResources =
-      taskKey[Map[File, String]]("webapp resources")
+      taskKey[Map[String, File]]("webapp resources")
 
     lazy val webappClasses =
-      taskKey[Map[File, String]]("webapp classes")
+      taskKey[Map[String, File]]("webapp classes")
 
     lazy val webappLib =
-      taskKey[Map[File, String]]("webapp lib")
+      taskKey[Map[String, File]]("webapp lib")
   }
 
   import autoImport._
@@ -32,16 +32,16 @@ object WebappComponentsPlugin extends AutoPlugin {
     val webappResourcesDir: Initialize[File] =
       Def.setting((Compile / sourceDirectory).value / "webapp")
 
-    val webappResourcesTask: Initialize[Task[Map[File, String]]] =
+    val webappResourcesTask: Initialize[Task[Map[String, File]]] =
       Def.task(WebappComponents.getResources(webappResourcesDir.value))
 
     val classpathFiles: Initialize[Task[Seq[File]]] =
       Def.task((Runtime / fullClasspath).value.files)
 
-    val webappClassesTask: Initialize[Task[Map[File, String]]] =
+    val webappClassesTask: Initialize[Task[Map[String, File]]] =
       Def.task(WebappComponents.getClasses(classpathFiles.value))
 
-    val webappLibTask: Initialize[Task[Map[File, String]]] =
+    val webappLibTask: Initialize[Task[Map[String, File]]] =
       Def.task(WebappComponents.getLib(classpathFiles.value))
 
     Seq(
@@ -50,4 +50,11 @@ object WebappComponentsPlugin extends AutoPlugin {
       webappLib := webappLibTask.value
     )
   }
+
+  lazy val webappContents: Initialize[Task[Map[String, File]]] =
+    Def.task {
+      webappResources.value ++
+        webappClasses.value ++
+        webappLib.value
+    }
 }

src/main/scala/com/earldouglas/xwp/WebappPlugin.scala

@@ -105,8 +105,8 @@ object WebappPlugin extends AutoPlugin {
       val resourceFiles: Set[File] =
         WebappComponents
           .getResources(webappResourcesDir)
-          .filterNot(x => x._1.isDirectory())
-          .map(_._1)
+          .map(_._2)
+          .filterNot(_.isDirectory())
           .toSet
 
       cacheify(
@@ -156,7 +156,7 @@ object WebappPlugin extends AutoPlugin {
         (Runtime / fullClasspath).value
           .map(_.data)
 
-      val webappClasses: Map[File, String] =
+      val webappClasses: Map[String, File] =
         WebappComponents.getClasses(classpath)
 
       // copy this project's classes directly to WEB-INF/classes
@@ -166,12 +166,12 @@ object WebappPlugin extends AutoPlugin {
           "classes",
           { in =>
             webappClasses
-              .find { case (src, dest) => src == in }
-              .map { case (src, dest) => webInfDir / "classes" / dest }
+              .find { case (path, file) => file == in }
+              .map { case (path, file) => webInfDir / "classes" / path }
           },
           webappClasses
-            .filter { case (src, dest) => !src.isDirectory }
-            .map { case (src, dest) => src }
+            .filter { case (path, file) => file.isFile() }
+            .map { case (path, file) => file }
             .toSet,
           taskStreams
         )
@@ -186,7 +186,7 @@ object WebappPlugin extends AutoPlugin {
         val outputJar = webappLibDir / jarFilename
 
         Compat.jar(
-          sources = webappClasses,
+          sources = webappClasses.map({ case (k, v) => (v, k) }).toMap,
           outputJar = outputJar,
           manifest = new Manifest
         )
@@ -204,7 +204,7 @@ object WebappPlugin extends AutoPlugin {
       cacheify(
         "lib-deps",
         { in => Some(webappTarget / "WEB-INF" / "lib" / in.getName()) },
-        WebappComponents.getLib(classpath).keySet,
+        WebappComponents.getLib(classpath).values.toSet,
         taskStreams
       )