Fix classpath problems. Add support for scala.js. Add bootclasspath t…

…o generateDocumentation task

project/Build.scala

@@ -1242,16 +1242,26 @@ object Build {
       libraryDependencies += ("org.scala-js" %%% "scalajs-dom" % "1.1.0").cross(CrossVersion.for3Use2_13)
     )
 
-  def generateDocumentation(targets: Seq[String], name: String, outDir: String, ref: String, params: Seq[String] = Nil) =
+  def generateDocumentation(targets: Seq[String], name: String, outDir: String, ref: String, params: Seq[String] = Nil, addBootclasspath: Boolean = false) =
     Def.taskDyn {
       val distLocation = (dist / pack).value
       val projectVersion = version.value
       IO.createDirectory(file(outDir))
       val stdLibVersion = stdlibVersion(Bootstrapped)
+      val scalaLib = findArtifactPath(externalCompilerClasspathTask.value, "scala-library")
+      val dottyLib = (`scala3-library` / Compile / classDirectory).value
       // TODO add versions etc.
       def srcManaged(v: String, s: String) = s"out/bootstrap/stdlib-bootstrapped/scala-$v/src_managed/main/$s-library-src"
       def scalaSrcLink(v: String, s: String) = s"-source-links:$s=github://scala/scala/v$v#src/library"
       def dottySrcLink(v: String, s: String) = s"-source-links:$s=github://lampepfl/dotty/$v#library/src"
+      def bootclasspath: Seq[String] = if(addBootclasspath) Seq(
+        "-bootclasspath",
+        Seq(
+            scalaLib,
+            dottyLib
+        ).mkString(System.getProperty("path.separator"))
+      ) else Nil
+
       val revision = Seq("-revision", ref, "-project-version", projectVersion)
       val cmd = Seq(
         "-d",
@@ -1260,7 +1270,7 @@ object Build {
         name,
         scalaSrcLink(stdLibVersion, srcManaged(dottyNonBootstrappedVersion, "scala")),
         dottySrcLink(referenceVersion, srcManaged(dottyNonBootstrappedVersion, "dotty"))
-      ) ++ scalacOptionsDocSettings ++ revision ++ params ++ targets
+      ) ++ scalacOptionsDocSettings ++ revision ++ params ++ targets ++ bootclasspath
       import _root_.scala.sys.process._
       Def.task((s"$distLocation/bin/scaladoc" +: cmd).!)
     }
@@ -1310,6 +1320,7 @@ object Build {
         generateDocumentation(
           (Compile / classDirectory).value.getAbsolutePath :: Nil,
           "scaladoc", "scaladoc/output/self", VersionUtil.gitHash,
+          addBootclasspath = true
         )
       }.value,
       generateScalaDocumentation := Def.inputTaskDyn {
@@ -1361,7 +1372,8 @@ object Build {
           (Test / Build.testcasesOutputDir).value,
           "scaladoc testcases",
           "scaladoc/output/testcases",
-          "master")
+          "master",
+          addBootclasspath = true)
       }.value,
 
       Test / buildInfoKeys := Seq[BuildInfoKey](

scaladoc/src/dotty/tools/scaladoc/DocContext.scala

@@ -76,7 +76,7 @@ case class DocContext(args: Scaladoc.Args, compilerContext: CompilerContext):
 
   lazy val snippetCompilerArgs = snippets.SnippetCompilerArgs.load(args.snippetCompiler, args.snippetCompilerDebug)(using compilerContext)
 
-  lazy val snippetChecker = snippets.SnippetChecker(args.classpath, args.tastyDirs)
+  lazy val snippetChecker = snippets.SnippetChecker(args.classpath, args.bootclasspath, args.tastyFiles, compilerContext.settings.scalajs.value(using compilerContext))
 
   lazy val staticSiteContext = args.docsRoot.map(path => StaticSiteContext(
       File(path).getAbsoluteFile(),

scaladoc/src/dotty/tools/scaladoc/Scaladoc.scala

@@ -31,6 +31,7 @@ object Scaladoc:
     tastyDirs: Seq[File] = Nil,
     tastyFiles: Seq[File] = Nil,
     classpath: String = "",
+    bootclasspath: String = "",
     output: File,
     docsRoot: Option[String] = None,
     projectVersion: Option[String] = None,
@@ -174,6 +175,7 @@ object Scaladoc:
         dirs,
         validFiles,
         classpath.get,
+        bootclasspath.get,
         destFile,
         siteRoot.nonDefault,
         projectVersion.nonDefault,

scaladoc/src/dotty/tools/scaladoc/ScaladocSettings.scala

@@ -19,13 +19,14 @@ import dotty.tools.dotc.core.Contexts._
 class ScaladocSettings extends SettingGroup with AllScalaSettings:
   val unsupportedSettings = Seq(
     // Options that we like to support
-    bootclasspath, extdirs, javabootclasspath, encoding, usejavacp,
+    extdirs, javabootclasspath, encoding, usejavacp,
     // Needed for plugin architecture
     plugin,disable,require, pluginsDir, pluginOptions,
     // we need support for sourcepath and sourceroot
     sourcepath, sourceroot
   )
 
+
   val projectName: Setting[String] =
     StringSetting("-project", "project title", "The name of the project.", "", aliases = List("-doc-title"))
 

scaladoc/src/dotty/tools/scaladoc/snippets/SnippetChecker.scala

@@ -5,16 +5,23 @@ import dotty.tools.scaladoc.DocContext
 import java.nio.file.Paths
 import java.io.File
 
-class SnippetChecker(val classpath: String, val tastyDirs: Seq[File]):
+import dotty.tools.io.AbstractFile
+import dotty.tools.dotc.fromtasty.TastyFileUtil
+
+class SnippetChecker(val classpath: String, val bootclasspath: String, val tastyFiles: Seq[File], isScalajs: Boolean):
   private val sep = System.getProperty("path.separator")
   private val cp = List(
-    tastyDirs.map(_.getAbsolutePath()).mkString(sep),
+    tastyFiles
+      .map(_.getAbsolutePath())
+      .map(AbstractFile.getFile(_))
+      .flatMap(t => try { TastyFileUtil.getClassPath(t) } catch { case e: AssertionError => Seq() })
+      .distinct.mkString(sep),
     classpath,
-    System.getProperty("java.class.path")
+    bootclasspath
   ).mkString(sep)
 
 
-  private val compiler: SnippetCompiler = SnippetCompiler(classpath = cp)
+  private val compiler: SnippetCompiler = SnippetCompiler(classpath = cp, scalacOptions = if isScalajs then "-scalajs" else "")
 
   // These constants were found empirically to make snippet compiler
   // report errors in the same position as main compiler.

scaladoc/src/dotty/tools/scaladoc/snippets/SnippetCompiler.scala

@@ -32,6 +32,7 @@ class SnippetCompiler(
     val options = scalacOptions.split("\\s+").toList
     val settings =
       options ::: defaultFlags ::: "-classpath" :: classpath :: Nil
+
     new InteractiveDriver(settings)
   }
 

scaladoc/test/dotty/tools/scaladoc/BaseHtmlTest.scala

@@ -35,6 +35,7 @@ class BaseHtmlTest:
             output = dest.toFile,
             docsRoot = docsRoot,
             projectVersion = Some(projectVersion),
+            bootclasspath = dotty.tools.dotc.util.ClasspathFromClassloader(classOf[Predef$].getClassLoader())
           )
         Scaladoc.run(args)(using testContext)
         op(using ProjectContext(dest))

scaladoc/test/dotty/tools/scaladoc/snippets/SnippetsE2eTest.scala

@@ -38,7 +38,8 @@ abstract class SnippetsE2eTest(testName: String, flag: SCFlags, debug: Boolean)
       output = getTempDir().getRoot,
       projectVersion = Some("1.0"),
       snippetCompiler = List(s"${BuildInfo.test_testcasesSourceRoot}/tests=${flag.flagName}"),
-      snippetCompilerDebug = debug
+      snippetCompilerDebug = debug,
+      bootclasspath = dotty.tools.dotc.util.ClasspathFromClassloader(classOf[Predef$].getClassLoader())
     )
 
   override def withModule(op: DocContext ?=> Module => Unit) =

scaladoc/test/dotty/tools/scaladoc/testUtils.scala

@@ -54,7 +54,8 @@ def testArgs(files: Seq[File] = Nil, dest: File = new File("notUsed")) = Scalado
           name = "Test Project Name",
           output = dest,
           tastyFiles = files,
-          docsRoot = Some("")
+          docsRoot = Some(""),
+          bootclasspath = dotty.tools.dotc.util.ClasspathFromClassloader(classOf[Predef$].getClassLoader())
         )
 
 def testContext = (new ContextBase).initialCtx.fresh.setReporter(new TestReporter)