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Sbt doesn't recognise WSL UNC path - Invalid build URI (no handler available) #7135

@ghost

Description

steps

Start sbt-laucher.jar with a current UNC WSL directory, for example (starting from NuShell, because cmd.exe doesn't support UNC paths well):

\\wsl$\OracleLinux_9\home\user\project > C:\Users\user\apps\jdk-11.0.18\bin\java.exe -Dfile.encoding=UTF-8 -jar C:\Users\user\apps\sbt\bin\sbt-launcher.jar sbtVersion
[info] welcome to sbt 1.8.2 (Oracle Corporation Java 11.0.18)
java.lang.RuntimeException: Invalid build URI (no handler available): file:/wsl$/OracleLinux_9/home/user/project/
        at scala.sys.package$.error(package.scala:30)
        at sbt.internal.Load$.$anonfun$builtinLoader$1(Load.scala:489)
        at sbt.internal.BuildLoader.$anonfun$apply$3(BuildLoader.scala:244)
        at scala.Option.getOrElse(Option.scala:189)
        at sbt.internal.BuildLoader.apply(BuildLoader.scala:244)
        at sbt.internal.Load$.loadURI$1(Load.scala:554)
        at sbt.internal.Load$.loadAll(Load.scala:570)
        at sbt.internal.Load$.loadURI(Load.scala:500)
        at sbt.internal.Load$.load(Load.scala:479)
        at sbt.internal.Load$.$anonfun$apply$1(Load.scala:241)
        at sbt.internal.Load$.timed(Load.scala:1406)
        at sbt.internal.Load$.apply(Load.scala:241)
        at sbt.internal.Load$.defaultLoad(Load.scala:56)
        at sbt.BuiltinCommands$.liftedTree1$1(Main.scala:961)
        at sbt.BuiltinCommands$.doLoadProject(Main.scala:961)
        at sbt.BuiltinCommands$.$anonfun$loadProjectImpl$2(Main.scala:914)
        at sbt.Command$.$anonfun$applyEffect$4(Command.scala:150)
        at sbt.Command$.$anonfun$applyEffect$2(Command.scala:145)
        at sbt.Command$.process(Command.scala:189)
        at sbt.MainLoop$.$anonfun$processCommand$5(MainLoop.scala:245)
        at scala.Option.getOrElse(Option.scala:189)
        at sbt.MainLoop$.process$1(MainLoop.scala:245)
        at sbt.MainLoop$.processCommand(MainLoop.scala:278)
        at sbt.MainLoop$.$anonfun$next$5(MainLoop.scala:163)
        at sbt.State$StateOpsImpl$.runCmd$1(State.scala:289)
        at sbt.State$StateOpsImpl$.process$extension(State.scala:325)
        at sbt.MainLoop$.$anonfun$next$4(MainLoop.scala:163)
        at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
        at sbt.MainLoop$.next(MainLoop.scala:163)
        at sbt.MainLoop$.run(MainLoop.scala:144)
        at sbt.MainLoop$.$anonfun$runWithNewLog$1(MainLoop.scala:119)
        at sbt.io.Using.apply(Using.scala:27)
        at sbt.MainLoop$.runWithNewLog(MainLoop.scala:112)
        at sbt.MainLoop$.runAndClearLast(MainLoop.scala:66)
        at sbt.MainLoop$.runLoggedLoop(MainLoop.scala:51)
        at sbt.MainLoop$.runLogged(MainLoop.scala:42)
        at sbt.StandardMain$.runManaged(Main.scala:223)
        at sbt.xMain$.$anonfun$run$11(Main.scala:133)
        at scala.util.DynamicVariable.withValue(DynamicVariable.scala:62)
        at scala.Console$.withIn(Console.scala:230)
        at sbt.internal.util.Terminal$.withIn(Terminal.scala:578)
        at sbt.internal.util.Terminal$.$anonfun$withStreams$1(Terminal.scala:358)
        at scala.util.DynamicVariable.withValue(DynamicVariable.scala:62)
        at scala.Console$.withOut(Console.scala:167)
        at sbt.internal.util.Terminal$.$anonfun$withOut$2(Terminal.scala:568)
        at scala.util.DynamicVariable.withValue(DynamicVariable.scala:62)
        at scala.Console$.withErr(Console.scala:196)
        at sbt.internal.util.Terminal$.withOut(Terminal.scala:568)
        at sbt.internal.util.Terminal$.withStreams(Terminal.scala:358)
        at sbt.xMain$.withStreams$1(Main.scala:87)
        at sbt.xMain$.run(Main.scala:121)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at sbt.internal.XMainConfiguration.run(XMainConfiguration.java:57)
        at sbt.xMain.run(Main.scala:46)
        at xsbt.boot.Launch$.$anonfun$run$1(Launch.scala:149)
        at xsbt.boot.Launch$.withContextLoader(Launch.scala:176)
        at xsbt.boot.Launch$.run(Launch.scala:149)
        at xsbt.boot.Launch$.$anonfun$apply$1(Launch.scala:44)
        at xsbt.boot.Launch$.launch(Launch.scala:159)
        at xsbt.boot.Launch$.apply(Launch.scala:44)
        at xsbt.boot.Launch$.apply(Launch.scala:21)
        at xsbt.boot.Boot$.runImpl(Boot.scala:78)
        at xsbt.boot.Boot$.run(Boot.scala:73)
        at xsbt.boot.Boot$.main(Boot.scala:21)
        at xsbt.boot.Boot.main(Boot.scala)
[error] Invalid build URI (no handler available): file:/wsl$/OracleLinux_9/home/user/project/
[error] Use 'last' for the full log.
[warn] Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore? (default: r)

problem

Sbt fails.

expectation

Sbt doesn't fail.

notes

JetBrains IDEA seems to work fine with WSL UNC paths, and quick research shows that Java supports UNC paths since the year 1999, so I'm guessing it's something in Sbt's logic?

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