Add directives for JMH

build.sc

@@ -1045,6 +1045,11 @@ trait CliIntegration extends SbtModule with ScalaCliPublishModule with HasTests
            |
            |  def ghOrg  = "$ghOrg"
            |  def ghName = "$ghName"
+           |
+           |  def jmhVersion = "${Deps.Versions.jmh}"
+           |  def jmhOrg = "${Deps.jmhCore.dep.module.organization.value}"
+           |  def jmhCoreModule = "${Deps.jmhCore.dep.module.name.value}"
+           |  def jmhGeneratorBytecodeModule = "${Deps.jmhGeneratorBytecode.dep.module.name.value}"
            |}
            |""".stripMargin
       if (!os.isFile(dest) || os.read(dest) != code)

modules/build/src/main/scala/scala/build/Build.scala

@@ -459,7 +459,7 @@ object Build {
 
     build0 match {
       case successful: Successful =>
-        if (options.jmhOptions.runJmh.getOrElse(false) && scope == Scope.Main)
+        if (options.jmhOptions.canRunJmh && scope == Scope.Main)
           value {
             val res = jmhBuild(
               inputs,

modules/build/src/main/scala/scala/build/preprocessing/directives/DirectivesPreprocessingUtils.scala

@@ -12,6 +12,7 @@ import scala.build.preprocessing.directives
 object DirectivesPreprocessingUtils {
   val usingDirectiveHandlers: Seq[DirectiveHandler[BuildOptions]] =
     Seq[DirectiveHandler[_ <: HasBuildOptions]](
+      directives.Benchmarking.handler,
       directives.BuildInfo.handler,
       directives.ComputeVersion.handler,
       directives.Exclude.handler,

modules/cli/src/main/scala/scala/cli/commands/bloop/Bloop.scala

@@ -33,7 +33,7 @@ object Bloop extends ScalaCommand[BloopOptions] {
       jvm = opts.jvm,
       coursier = opts.coursier
     )
-    val options = sharedOptions.buildOptions(false, None).orExit(opts.global.logging.logger)
+    val options = sharedOptions.buildOptions().orExit(opts.global.logging.logger)
 
     val javaHomeInfo = opts.compilationServer.bloopJvm
       .map(JvmUtils.downloadJvm(_, options))

modules/cli/src/main/scala/scala/cli/commands/doc/Doc.scala

@@ -30,12 +30,7 @@ object Doc extends ScalaCommand[DocOptions] {
 
   override def buildOptions(options: DocOptions): Option[BuildOptions] =
     sharedOptions(options)
-      .map(shared =>
-        shared.buildOptions(
-          enableJmh = shared.benchmarking.jmh.getOrElse(false),
-          jmhVersion = shared.benchmarking.jmhVersion
-        ).orExit(shared.logger)
-      )
+      .map(shared => shared.buildOptions().orExit(shared.logger))
 
   override def helpFormat: HelpFormat = super.helpFormat.withPrimaryGroup(HelpGroup.Doc)
 

modules/cli/src/main/scala/scala/cli/commands/run/Run.scala

@@ -72,11 +72,8 @@ object Run extends ScalaCommand[RunOptions] with BuildCommandHelpers {
   override def buildOptions(options: RunOptions): Some[BuildOptions] = Some {
     import options.*
     import options.sharedRun.*
-    val logger = options.shared.logger
-    val baseOptions = shared.buildOptions(
-      enableJmh = shared.benchmarking.jmh.contains(true),
-      jmhVersion = shared.benchmarking.jmhVersion
-    ).orExit(logger)
+    val logger      = options.shared.logger
+    val baseOptions = shared.buildOptions().orExit(logger)
     baseOptions.copy(
       mainClass = mainClass.mainClass,
       javaOptions = baseOptions.javaOptions.copy(
@@ -375,7 +372,8 @@ object Run extends ScalaCommand[RunOptions] with BuildCommandHelpers {
 
     val mainClassOpt = build.options.mainClass.filter(_.nonEmpty) // trim it too?
       .orElse {
-        if (build.options.jmhOptions.runJmh.contains(false)) Some("org.openjdk.jmh.Main")
+        if build.options.jmhOptions.enableJmh.contains(true) && !build.options.jmhOptions.canRunJmh
+        then Some("org.openjdk.jmh.Main")
         else None
       }
     val mainClass = mainClassOpt match {

modules/cli/src/main/scala/scala/cli/commands/shared/BenchmarkingOptions.scala

@@ -2,6 +2,7 @@ package scala.cli.commands.shared
 
 import caseapp.*
 
+import scala.build.internal.Constants
 import scala.cli.commands.tags
 
 // format: off
@@ -12,7 +13,7 @@ final case class BenchmarkingOptions(
     jmh: Option[Boolean] = None,
   @Group(HelpGroup.Benchmarking.toString)
   @Tag(tags.experimental)
-  @HelpMessage("Set JMH version")
+  @HelpMessage(s"Set JMH version (default: ${Constants.jmhVersion})")
   @ValueDescription("version")
     jmhVersion: Option[String] = None
 )