License: Creative Commons Zero v1.0 Universal
A Giter8 template for a Hello World application, used in the Getting Started with Scala guide.
Written in 2017-2022 by the Scala Center
To the extent possible under law, the author(s) have dedicated all copyright and related and neighboring rights to this template to the public domain worldwide. This template is distributed without any warranty. See http://creativecommons.org/publicdomain/zero/1.0/.
Downloaded project successfully with sbt new scala/hello-world.g8 according to these instructions:
https://docs.scala-lang.org/getting-started-sbt-track/getting-started-with-scala-and-sbt-on-the-command-line.html
Within sbt, I type run, and get the following error message - not sure how to resolve. Tried googling a few things but no luck - apologies if this has an easy fix on my end. Let me know if you need more info.
[info] Updating {file:/Users/jonathanseery/scala-projects/hello-world/}hello-world...
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[warn] :: UNRESOLVED DEPENDENCIES ::
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[warn] :: org.typelevel#cats-core_2.12;1.0.1: 1
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[warn]
[warn] Note: Unresolved dependencies path:
[warn] org.typelevel:cats-core_2.12:1.0.1 (/Users/jonathanseery/scala-projects/hello-world/build.sbt#L26-27)
[warn] +- ch.epfl.scala:hello-world_2.12:1.0
[error] sbt.librarymanagement.ResolveException: unresolved dependency: org.typelevel#cats-core_2.12;1.0.1: 1
[error] at sbt.internal.librarymanagement.IvyActions$.resolveAndRetrieve(IvyActions.scala:331)
[error] at sbt.internal.librarymanagement.IvyActions$.$anonfun$updateEither$1(IvyActions.scala:205)
[error] at sbt.internal.librarymanagement.IvySbt$Module.$anonfun$withModule$1(Ivy.scala:229)
[error] at sbt.internal.librarymanagement.IvySbt.$anonfun$withIvy$1(Ivy.scala:190)
[error] at sbt.internal.librarymanagement.IvySbt.sbt$internal$librarymanagement$IvySbt$$action$1(Ivy.scala:70)
[error] at sbt.internal.librarymanagement.IvySbt$$anon$3.call(Ivy.scala:77)
[error] at xsbt.boot.Locks$GlobalLock.withChannel$1(Locks.scala:95)
[error] at xsbt.boot.Locks$GlobalLock.xsbt$boot$Locks$GlobalLock$$withChannelRetries$1(Locks.scala:80)
[error] at xsbt.boot.Locks$GlobalLock$$anonfun$withFileLock$1.apply(Locks.scala:99)
[error] at xsbt.boot.Using$.withResource(Using.scala:10)
[error] at xsbt.boot.Using$.apply(Using.scala:9)
[error] at xsbt.boot.Locks$GlobalLock.ignoringDeadlockAvoided(Locks.scala:60)
[error] at xsbt.boot.Locks$GlobalLock.withLock(Locks.scala:50)
[error] at xsbt.boot.Locks$.apply0(Locks.scala:31)
[error] at xsbt.boot.Locks$.apply(Locks.scala:28)
[error] at sbt.internal.librarymanagement.IvySbt.withDefaultLogger(Ivy.scala:77)
[error] at sbt.internal.librarymanagement.IvySbt.withIvy(Ivy.scala:185)
[error] at sbt.internal.librarymanagement.IvySbt.withIvy(Ivy.scala:182)
[error] at sbt.internal.librarymanagement.IvySbt$Module.withModule(Ivy.scala:228)
[error] at sbt.internal.librarymanagement.IvyActions$.updateEither(IvyActions.scala:190)
[error] at sbt.librarymanagement.ivy.IvyDependencyResolution.update(IvyDependencyResolution.scala:20)
[error] at sbt.librarymanagement.DependencyResolution.update(DependencyResolution.scala:56)
[error] at sbt.internal.LibraryManagement$.resolve$1(LibraryManagement.scala:38)
[error] at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$12(LibraryManagement.scala:91)
[error] at sbt.util.Tracked$.$anonfun$lastOutput$1(Tracked.scala:68)
[error] at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$19(LibraryManagement.scala:104)
[error] at scala.util.control.Exception$Catch.apply(Exception.scala:224)
[error] at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$11(LibraryManagement.scala:104)
[error] at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$11$adapted(LibraryManagement.scala:87)
[error] at sbt.util.Tracked$.$anonfun$inputChanged$1(Tracked.scala:149)
[error] at sbt.internal.LibraryManagement$.cachedUpdate(LibraryManagement.scala:118)
[error] at sbt.Classpaths$.$anonfun$updateTask$5(Defaults.scala:2353)
[error] at scala.Function1.$anonfun$compose$1(Function1.scala:44)
[error] at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:42)
[error] at sbt.std.Transform$$anon$4.work(System.scala:64)
[error] at sbt.Execute.$anonfun$submit$2(Execute.scala:257)
[error] at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:16)
[error] at sbt.Execute.work(Execute.scala:266)
[error] at sbt.Execute.$anonfun$submit$1(Execute.scala:257)
[error] at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:167)
[error] at sbt.CompletionService$$anon$2.call(CompletionService.scala:32)
[error] at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514)
[error] at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
[error] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
[error] at java.base/java.lang.Thread.run(Thread.java:844)
[error] (*:update) sbt.librarymanagement.ResolveException: unresolved dependency: org.typelevel#cats-core_2.12;1.0.1: 1
Same as in scala/vscode-scala-syntax#170
I use this repo pretty frequently to bootstrap minimal sbt projects, and I often recommend people struggling with setting up an sbt project to do the same. Today while using this again I had a thought about using Scalatest. In light of the announcement of Scala Toolkit and the decision to use munit as the testing framework, I wonder if it makes sense to align this template with that.
I'm happy to pr this change.
I think it would be better to have a normal def main(boilerplate) instead of extending the magic App trait. For beginners it is very nice to be able to directly click the "run|debug" appearing automatically in VS code + Metals when using an ordinary def main. This easy click-and run experience is not offered with extends App as no such "run|debug" thing appears then.
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