Trying to run Ammonite on Windows is a nightmare. Trying to do any useful development on Windows is a huge waste of time. Why would you even bother? Unfortunately while working at a client site I was forced to use Windows. I still needed to install my usual tools, which included Ammonite. After trying to run Ammonite within GitBash on ConEmu, I was greeted with this error:

error] (run-main-0) java.lang.RuntimeException: Nonzero exit value: 1
java.lang.RuntimeException: Nonzero exit value: 1
        at scala.sys.package$.error(package.scala:27)
        at scala.sys.process.ProcessBuilderImpl$AbstractBuilder.slurp(ProcessBuilderImpl.scala:132)
        at scala.sys.process.ProcessBuilderImpl$AbstractBuilder.$bang$bang(ProcessBuilderImpl.scala:102)
        at ammonite.terminal.TTY$.stty(Utils.scala:95)
        at ammonite.terminal.TTY$.init(Utils.scala:74)
        at ammonite.terminal.TermCore$.x$7$lzycompute$1(TermCore.scala:297)
        at ammonite.terminal.TermCore$.x$7$1(TermCore.scala:297)
        at ammonite.terminal.TermCore$.initialConfig$lzycompute$1(TermCore.scala:297)
        at ammonite.terminal.TermCore$.initialConfig$1(TermCore.scala:297)
        at ammonite.terminal.TermCore$.readLine(TermCore.scala:307)
        at ammonite.repl.frontend.AmmoniteFrontEnd.readLine(AmmoniteFrontEnd.scala:114)
        at ammonite.repl.frontend.AmmoniteFrontEnd.action(AmmoniteFrontEnd.scala:26)
        at ammonite.repl.Repl.action(Repl.scala:56)
        at ammonite.repl.Repl.loop$1(Repl.scala:89)
        at ammonite.repl.Main$.run(Main.scala:135)
        at ammonite.repl.Main$$anonfun$main$2.apply(Main.scala:82)
        at ammonite.repl.Main$$anonfun$main$2.apply(Main.scala:81)
        at scala.Option.foreach(Option.scala:257)
        at ammonite.repl.Main$.main(Main.scala:81)
        at ammonite.repl.Main.main(Main.scala)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)

After a little digging around I found the Ammonite-REPL doesn't work on Windows issue in the issue tracker. Oh noes!! But I had to have some Ammonite power for what I was working on. One of comments on the issue by avakhrenev mentioned that swapping out the default frontend in the Repl.scala class to JLineWindows seemed fix the problem.

After cloning the Ammonite project, I updated frontend in the repl/src/main/scala/ammonite/repl/Repl.scala file as follows:

val frontEnd = Ref[FrontEnd](ammonite.repl.frontend.FrontEnd.JLineWindows)

I then tested it through sbt with:

sbt repl/run

The workaround had fixed the issue! Yay!

I proceeded to build the patched version of Ammonite with:

sbt repl/assembly

I then copied the generated executable into my bin directory:

cp repl/target/scala-2.11/ammonite-repl-0.5.6-SNAPSHOT-2.11.7 ~/bin/amm

And now I can run amm as per usual on Windows.

Ammonite on Windows