JavaUnidocPlugin+GenJavadocPlugin is broken for Scala 2.12.15

[ksen0byte]

The following build.sbt configuration is working with Scala 2.12.10, but is broken for Scala 2.12.15:

Error:

[error] (update) sbt.librarymanagement.ResolveException: Error downloading com.typesafe.genjavadoc:genjavadoc-plugin_2.12.15:0.15

And there is indeed no Maven dependency with such artifactId and version: https://mvnrepository.com/artifact/com.typesafe.genjavadoc/genjavadoc-plugin

build.sbt :

ThisBuild / version := "0.1.0-SNAPSHOT"

ThisBuild / scalaVersion := "2.12.15"

lazy val root = (project in file("."))
  .enablePlugins(JavaUnidocPlugin, GenJavadocPlugin)
  .settings(
    name := "unidoc-plugin-test"
  )

project/build.properties:

sbt.version = 1.5.4

project/plugins.sbt:

addSbtPlugin("com.github.sbt" % "sbt-unidoc" % "0.5.0")

[SethTisue]

try setting unidocGenjavadocVersion to 0.18

a pull request making that the default (instead of the current default, 0.15) would be welcome

[ksen0byte]

Created a PR