zio-nio-core_3 has Scala 2.13 dependencies

[marcsaegesser]

The zio-nio-core_3 in Maven has dependencies on Scala 2.13 libraries silencer-lib and scala-collection-compat. If I use zio-nio in a project that also depends on one of those libraries I get a compile error about cross-version suffixes.

        <dependency>
            <groupId>com.github.ghik</groupId>
            <artifactId>silencer-lib_2.13.6</artifactId>
            <version>1.7.4</version>
            <scope>provided</scope>
        </dependency>
       <dependency>
            <groupId>org.scala-lang.modules</groupId>
            <artifactId>scala-collection-compat_2.13</artifactId>
            <version>2.4.4</version>
        </dependency>

I cloned the repo and tried building the top-level project and it fails with the same error.

sbt "++ 3.0.2;compile"
[info] welcome to sbt 1.5.5 (Ubuntu Java 11.0.11)
[info] loading settings for project zio-nio from build.sbt ...
[info] set current project to zio-nio (in build file:/home/msaegesser/work/zio-nio/)
[info] Setting Scala version to 3.0.2 on 2 projects.
[info] Excluded 2 projects, run ++ 3.0.2 -v for more details.
[info] Reapplying settings...
[info] set current project to zio-nio (in build file:/home/msaegesser/work/zio-nio/)
[error] Modules were resolved with conflicting cross-version suffixes in ProjectRef(uri("file:/home/msaegesser/work/zio-nio/"), "docs"):
[error]    org.scala-lang.modules:scala-collection-compat _3, _2.13
[error] java.lang.RuntimeException: Conflicting cross-version suffixes in: org.scala-lang.modules:scala-collection-compat
[error] 	at scala.sys.package$.error(package.scala:30)
[error] 	at sbt.librarymanagement.ConflictWarning$.processCrossVersioned(ConflictWarning.scala:39)
[error] 	at sbt.librarymanagement.ConflictWarning$.apply(ConflictWarning.scala:19)
[error] 	at sbt.Classpaths$.$anonfun$ivyBaseSettings$71(Defaults.scala:3194)
[error] 	at scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error] 	at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
[error] 	at sbt.std.Transform$$anon$4.work(Transform.scala:68)
[error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:282)
[error] 	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
[error] 	at sbt.Execute.work(Execute.scala:291)
[error] 	at sbt.Execute.$anonfun$submit$1(Execute.scala:282)
[error] 	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:64)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
[error] 	at java.base/java.lang.Thread.run(Thread.java:829)
[error] (docs / update) Conflicting cross-version suffixes in: org.scala-lang.modules:scala-collection-compat
[error] Total time: 1 s, completed Nov 22, 2021, 9:42:15 AM

Curiously, if I run sbt "++ 3.0.2;publishLocal I get a zio-nio artifact that does not depend on zio-nio-core and has a scala-collection-compat_3:2.5.5 dependency and only has a 2.13 dependency on silencer-lib.

I'm hoping someone here has better sbt chops that I do and understand how this happens.

[marcsaegesser]

This comment on a PR from a couple months ago describes a work-around for this problem. I thought I'd share it here to make it more visible to others facing the same issue.

[francisdb]

This was fixed on master but did not make it to 2.0.0-RC1

[info]   | +-dev.zio:zio-nio_3:2.0.0-RC1
[info]   | | +-dev.zio:zio-streams_3:2.0.0-RC1
[info]   | | | +-org.scala-lang:scala3-library_3:3.1.0 (evicted by: 3.1.1)
[info]   | | |
[info]   | | +-dev.zio:zio_3:2.0.0-RC1
[info]   | | | +-org.scala-lang:scala3-library_3:3.1.0 (evicted by: 3.1.1)
[info]   | | |
[info]   | | +-org.scala-lang.modules:scala-collection-compat_2.13:2.6.0 [S]
[info]   | | +-org.scala-lang:scala3-library_3:3.1.0 (evicted by: 3.1.1)
[info]   | | +-org.scala-lang:scala3-library_3:3.1.1 [S]

[francisdb]

Still broken on 2.0.0 FINAL

https://repo1.maven.org/maven2/dev/zio/zio-nio_3/2.0.0/zio-nio_3-2.0.0.pom