Use scalapb-protoc with Dotty

I’m trying to set up a project with Dotty.

Currently my project/protoc.sbt looks like this:

addSbtPlugin("com.thesamet" % "sbt-protoc" % "0.99.19")

libraryDependencies += "com.thesamet.scalapb" %% "compilerplugin" % "0.8.3"

I’m using libraries compiled to Scala 2.12 by using withDottyCompat in my build.sbt, as explained in the Dotty docs:

lazy val root = project
    .in(file("."))
    .settings(
        libraryDependencies ++= scalaDeps.map(_.withDottyCompat(scalaVersion.value))
                             ++ javaDeps
    )

Unfortunately, it appears that sbt-protoc is adding runtime dependencies using %%, which makes it pick up the Dotty version (currently 0.13):

[error] (update) sbt.librarymanagement.ResolveException: unresolved dependency:
                 com.thesamet.scalapb#scalapb-runtime_0.13;0.8.3: not found

[thesamet]

Sure thing. Note that current snapshot versions of ScalaPB support Dotty 0.27, so the workaround is not necessary in that case, see for example https://oss.sonatype.org/content/repositories/snapshots/com/thesamet/scalapb/scalapb-runtime_0.27/

[thesamet]

I believe this issue can be closed. ScalaPB 0.11.x is tested and released with Scala 3. Usage is documented in https://scalapb.github.io/docs/dotty