Doc do not fail for empty (or java) modules

Author: romanowski

community-build/src/scala/dotty/communitybuild/projects.scala

@@ -408,7 +408,7 @@ object projects:
     sbtTestCommand  = "testsJVM/test;testsJS/test;",
     // Hardcode the version to avoid having to deal with something set by sbt-dynver
     sbtPublishCommand   = s"""set every version := "${Versions.munit}"; munitJVM/publishLocal; munitJS/publishLocal; munitScalacheckJVM/publishLocal; munitScalacheckJS/publishLocal; junit/publishLocal""",
-    sbtDocCommand   = "munitJVM/doc",
+    sbtDocCommand   = "junit/doc; munitJVM/doc",
     dependencies = List(scalacheck)
   )
 

scaladoc/src/dotty/tools/scaladoc/tasty/TastyParser.scala

@@ -123,7 +123,7 @@ case class ScaladocTastyInspector()(using ctx: DocContext) extends DocTastyInspe
     val filePaths = ctx.args.tastyFiles.map(_.getAbsolutePath).toList
     val classpath = ctx.args.classpath.split(java.io.File.pathSeparator).toList
 
-    inspectFilesInContext(classpath, filePaths)
+    if filePaths.nonEmpty then inspectFilesInContext(classpath, filePaths)
 
     val all = topLevels.result()
     all.groupBy(_._1).map { case (pckName, members) =>