Cross compile generate-reference-doc on Scala 3 LTS & Next

Author: Gedochao

.github/workflows/ci.yml

@@ -975,9 +975,9 @@ jobs:
         jvm: "temurin:17"
     - name: Check that reference doc is up-to-date
       run: |
-        ./mill -i generate-reference-doc.run --check || (
+        ./mill -i 'generate-reference-doc[]'.run --check || (
           echo "Reference doc is not up-to-date. Run"
-          echo "  ./mill -i generate-reference-doc.run"
+          echo "  ./mill -i 'generate-reference-doc[]'.run"
           echo "to update it, then commit the result."
           exit 1
         )

.scala-steward.conf

@@ -3,6 +3,6 @@ updates.ignore = [
     { groupId = "com.github.plokhotnyuk.jsoniter-scala", artifactId="jsoniter-scala-core", version="2.13.5.2" }
 ]
 postUpdateHooks = [{
-  command = ["./mill", "-i", "generate-reference-doc.run"],
+  command = ["./mill", "-i", "'generate-reference-doc[]'.run"],
   commitMessage = "Generate the reference doc"
 }]

CONTRIBUTING.md

@@ -47,7 +47,7 @@ will save you from getting a load of comments and speed up the code review.
     - ensure everything compiles at every commit (`./mill -i __.compile`);
     - ensure everything is well formatted at every commit (`scala-cli fmt .` or `scalafmt`);
     - ensure imports are well-ordered at every commit (`./mill -i __.fix`);
-    - ensure reference docs are up-to date at every commit (`./mill -i generate-reference-doc.run`);
+    - ensure reference docs are up-to date at every commit (`./mill -i 'generate-reference-doc[]'.run`);
     - ensure all tests pass at every commit (refer to the [dev docs](DEV.md) on how to run tests);
         - nobody expects you to run all the unit and integration tests for all platforms locally, that'd take too long;
         - just make sure the test suites relevant to your changes pass on your local machine.

build.sc

@@ -132,7 +132,7 @@ object integration extends CliIntegration {
   }
 }
 
-object `docs-tests` extends Cross[DocsTests](Scala.allScala3){
+object `docs-tests` extends Cross[DocsTests](Scala.allScala3) {
   def defaultCrossSegments = Seq(Scala.defaultInternal)
 }
 
@@ -180,10 +180,13 @@ object packager extends ScalaModule with Bloop.Module {
   def mainClass = Some("packager.cli.PackagerCli")
 }
 
-object `generate-reference-doc` extends SbtModule with ScalaCliScalafixModule {
-  def scalaVersion = Scala.defaultInternal
+object `generate-reference-doc` extends Cross[GenerateReferenceDoc](Scala.allScala3) {
+  def defaultCrossSegments = Seq(Scala.defaultInternal)
+}
+
+trait GenerateReferenceDoc extends CrossSbtModule with ScalaCliScalafixModule {
   def moduleDeps = Seq(
-    cli(Scala.defaultInternal)
+    cli(crossScalaVersion)
   )
   def repositoriesTask = T.task(super.repositoriesTask() ++ customRepositories)
   def ivyDeps = Agg(