Add updateCommunityBuild command

Author: OlivierBlanvillain

community-build/test/scala/dotty/communitybuild/CommunityBuildTest.scala

@@ -5,7 +5,9 @@ import java.io.{PrintWriter, File}
 import java.nio.charset.StandardCharsets.UTF_8
 import org.junit.{Ignore, Test}
 import org.junit.Assert.{assertEquals, fail}
+import org.junit.experimental.categories.Category
 
+@Category(Array(classOf[TestCategory]))
 class CommunityBuildTest {
   lazy val communitybuildDir: Path = Paths.get(sys.props("user.dir") + "/community-build/")
 
@@ -147,3 +149,12 @@ class CommunityBuildTest {
   //   command = "compile"
   // )
 }
+
+class TestCategory
+class UpdateCategory
+
+@Category(Array(classOf[UpdateCategory]))
+class CommunityBuildUpdate extends CommunityBuildTest {
+  override def test(project: String, command: String): Unit =
+    super.test(project, command.split("/").head + "/update")
+}

project/Build.scala

@@ -903,6 +903,8 @@ object Build {
 
   val prepareCommunityBuild = taskKey[Unit]("Publish local the compiler and the sbt plugin. Also store the versions of the published local artefacts in two files, community-build/{dotty-bootstrapped.version,sbt-dotty-sbt}.")
 
+  val updateCommunityBuild = taskKey[Unit]("Updates the community build.")
+
   lazy val `community-build` = project.in(file("community-build")).
     settings(commonNonBootstrappedSettings).
     settings(
@@ -920,6 +922,13 @@ object Build {
         IO.write(baseDirectory.value / "sbt-dotty-sbt", pluginText)
         IO.write(baseDirectory.value / "dotty-bootstrapped.version", dottyVersion)
       },
+      updateCommunityBuild := testOnly.in(Test).toTask(
+        " " + "dotty.communitybuild.CommunityBuildUpdate" +
+        " " + "-- --inclue-categories=dotty.communitybuild.UpdateCategory").value,
+      testOptions in Test += Tests.Argument(
+        TestFrameworks.JUnit,
+        "--inclue-categories=dotty.communitybuild.TestCategory",
+      ),
       (Test / testOnly) := ((Test / testOnly) dependsOn prepareCommunityBuild).evaluated,
       (Test / test    ) := ((Test / test    ) dependsOn prepareCommunityBuild).value
     )