Warn users rt caching may take a while.

com-lihaoyi · Mar 28, 2018 · cf81275 · cf81275
1 parent 0da406e
commit cf81275
Showing 1 changed file with 8 additions and 3 deletions.
diff --git a/main/src/mill/Main.scala b/main/src/mill/Main.scala
@@ -93,9 +93,6 @@ object Main {
           stderr.println("Build repl needs to be run with the -i/--interactive flag")
           (false, stateCache)
         }else{
-          // Init rt cache here
-          if (mill.clientserver.ClientServer.isJava9OrAbove)
-            Export.rtAt(cliConfig.home.toIO, true)
           val tqs = "\"\"\""
           val config =
             if(!repl) cliConfig
@@ -122,6 +119,14 @@ object Main {
             stateCache
           )
 
+          if (mill.clientserver.ClientServer.isJava9OrAbove) {
+            val rt = cliConfig.home / Export.rtJarName
+            if (!exists(rt)) {
+              runner.printInfo(s"Preparing Java ${System.getProperty("java.version")} runtime; this may take a minute or two ...")
+              Export.rtTo(rt.toIO, false)
+            }
+          }
+
           if (repl){
             runner.printInfo("Loading...")
             (runner.watchLoop(isRepl = true, printing = false, _.run()), runner.stateCache)