'other' has different root

[kthompson]

adding a predefScript(on windows) at C:\Users\Kevin\.mill\ammonite\predefScript.sc and then running build from another volume ie

E:\code\work\test > mill resolve __

Results in 'other' has different root exception.

❯ mill resolve __
Compiling C:\Users\Kevin\.mill\ammonite\predefScript.sc
java.lang.IllegalArgumentException: 'other' has different root
  sun.nio.fs.WindowsPath.relativize(WindowsPath.java:404)
  sun.nio.fs.WindowsPath.relativize(WindowsPath.java:42)
  os.Path.relativeTo(Path.scala:456)
  mill.main.MainRunner$CustomCodeWrapper$.apply(MainRunner.scala:178)
  ammonite.interp.Preprocessor$.wrapCode(Preprocessor.scala:141)
  ammonite.interp.DefaultPreprocessor.$anonfun$transform$2(DefaultPreprocessor.scala:46)
  ammonite.util.Res$Success.map(Res.scala:67)
  ammonite.interp.DefaultPreprocessor.transform(DefaultPreprocessor.scala:42)
  ammonite.interp.Interpreter.compileRunBlock$1(Interpreter.scala:518)
  ammonite.interp.Interpreter.$anonfun$processAllScriptBlocks$15(Interpreter.scala:568)
  ammonite.util.Res$Success.flatMap(Res.scala:62)
  ammonite.interp.Interpreter.$anonfun$processAllScriptBlocks$14(Interpreter.scala:565)
  ammonite.util.Res$Success.flatMap(Res.scala:62)
  ammonite.interp.Interpreter.$anonfun$processAllScriptBlocks$12(Interpreter.scala:562)
  scala.Option.getOrElse(Option.scala:201)
  ammonite.interp.Interpreter.loop$1(Interpreter.scala:562)
  ammonite.interp.Interpreter.processAllScriptBlocks(Interpreter.scala:600)
  ammonite.interp.Interpreter.$anonfun$processModule$6(Interpreter.scala:395)
  ammonite.util.Catching.flatMap(Res.scala:115)
  ammonite.interp.Interpreter.$anonfun$processModule$5(Interpreter.scala:386)
  ammonite.util.Res$Success.flatMap(Res.scala:62)
  ammonite.interp.Interpreter.processModule(Interpreter.scala:376)
  ammonite.interp.Interpreter.$anonfun$initializePredef$3(Interpreter.scala:140)
  ammonite.interp.Interpreter.$anonfun$initializePredef$3$adapted(Interpreter.scala:140)
  ammonite.interp.PredefInitialization$.$anonfun$apply$2(PredefInitialization.scala:79)
  ammonite.util.Res$.$anonfun$fold$1(Res.scala:32)
  scala.collection.LinearSeqOps.foldLeft(LinearSeq.scala:168)
  scala.collection.LinearSeqOps.foldLeft$(LinearSeq.scala:164)
  scala.collection.immutable.List.foldLeft(List.scala:79)
  ammonite.util.Res$.fold(Res.scala:30)
  ammonite.interp.PredefInitialization$.apply(PredefInitialization.scala:67)
  ammonite.interp.Interpreter.initializePredef(Interpreter.scala:142)
  ammonite.Main.$anonfun$instantiateInterpreter$1(Main.scala:189)
  scala.util.Either$RightProjection.flatMap(Either.scala:757)
  ammonite.Main.instantiateInterpreter(Main.scala:146)
  mill.main.MainRunner.$anonfun$runScript$2(MainRunner.scala:108)
  mill.main.RunScript$.runScript(RunScript.scala:43)
  mill.main.MainRunner.$anonfun$runScript$1(MainRunner.scala:115)
  mill.main.MainRunner.watchLoop2(MainRunner.scala:64)
  mill.main.MainRunnerFailed to connect to server

[Huelse]

same problem in windows 10, which my project in D:\
run .\mill.bat version:

Compiling C:\Users\Max\.mill\ammonite\predefScript.sc
java.lang.IllegalArgumentException: 'other' has different root
...

[lefou]

We currently encode foreign modules with a relative path, but under Windows, path with different drive letters can't be made relative to each other. (I think predef scripts are handled as foreign modules.) We probably need to change the handling of foreign modules to also support absolute paths, in case they can't be made relative.

[lihaoyi]

I think we can close this with #2377. Predef scripts are no longer supported, and the alternative meta-builds live in mill-build/build.sc in the same folder and are guaranteed to live in the same filesystem root

[lefou]

Ok, let's close this one. But I think we still can't import external modules which live on other windows drives. We can open a new issue, once we have a reproducer.