Enable ScalaDoc groups, ignore chisel3.internal

This adds the `-groups` option to `scalacOptions`. This makes ScalaDoc
build with group support such that developers can group methods using the
`@group <groupName>` tag.

This also adds the `-skip-packages chisel3.internal` option. This makes
ScalaDoc build while ignoring everything in the chisel3.internal package.

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/build.sbt b/build.sbt
index cf41a0ab..d3049939 100644
--- a/build.sbt
+++ b/build.sbt
@@ -140,6 +140,8 @@ lazy val chisel = (project in file(".")).
     scalacOptions in Test ++= Seq("-language:reflectiveCalls"),
     scalacOptions in Compile in doc ++= Seq(
       "-diagrams",
+      "-groups",
+      "-skip-packages", "chisel3.internal",
       "-diagrams-max-classes", "25",
       "-doc-version", version.value,
       "-doc-title", name.value,