Port Mill client over to Java

This helps us avoid accidentally depending on the Scala library, whose classloading takes tens to hundreds of milliseconds.

This removes the last parts of the Scala library used in the client (e.g. lambdas) and reduces `mill show core.compile` from ~380ms to ~290ms

1 files changed, 1 insertions, 1 deletions

diff --git a/build.sc b/build.sc
index 6b2224c5..915a5717 100755
--- a/build.sc
+++ b/build.sc
@@ -215,7 +215,7 @@ def launcherScript(jvmArgs: Seq[String],
      |    exec java $jvmArgsStr $$JAVA_OPTS -cp "$classPathStr" mill.Main "$$@"
      |    ;;
      |  *)
-     |    exec java $jvmArgsStr $$JAVA_OPTS -cp "$classPathStr" mill.ClientMain "$$@"
+     |    exec java $jvmArgsStr $$JAVA_OPTS -cp "$classPathStr" mill.clientserver.Client "$$@"
      |    ;;
      |esac
      """.stripMargin