Fix repeated traversal of packages when generating docs (5x speedup)

1 files changed, 23 insertions, 0 deletions

diff --git a/dottydoc/jvm/test/WhitelistedStdLibMain.scala b/dottydoc/jvm/test/WhitelistedStdLibMain.scala
new file mode 100644
index 000000000..f4a2f9dc6
--- /dev/null
+++ b/dottydoc/jvm/test/WhitelistedStdLibMain.scala
@@ -0,0 +1,23 @@
+package dotty.tools
+package dottydoc
+
+import scala.io.Source
+
+object WhitelistedStandardLib extends DottyDoc {
+  val files: List[String] = {
+    val whitelist = "../../test/dotc/scala-collections.whitelist"
+
+    Source.fromFile(whitelist, "UTF8")
+      .getLines()
+      .map(_.trim) // allow identation
+      .filter(!_.startsWith("#")) // allow comment lines prefixed by #
+      .map(_.takeWhile(_ != '#').trim) // allow comments in the end of line
+      .filter(_.nonEmpty)
+      .filterNot(_.endsWith("package.scala"))
+      .map("../." + _)
+      .toList
+  }
+
+  override def main(args: Array[String]) =
+    super.main("-language:Scala2" +: files.toArray)
+}