Failed to download an sbt plugin, but why did sbt attempt to download from that URL?

[TomasMikula]

Can sbt explain why it attempted to download a given artifact?

Given a minimal setup

build.sbt

lazy val root = (project in file("."))
  .settings(
    scalaVersion := "2.12.19",
  )

project/build.properties

sbt.version=1.9.9

project/plugins.sbt

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "1.2.0")

(and nothing else in the project directory),

after also deleting the C:\Users\X01344637\.sbt\repositories file,

running sbt I get this error:

C:\Users\X01344637\tmp\sbt-plugin-test>sbt
[info] welcome to sbt 1.9.9 (Oracle Corporation Java 17.0.2)
[info] loading settings for project sbt-plugin-test-build from plugins.sbt ...
[info] loading project definition from C:\Users\X01344637\tmp\sbt-plugin-test\project
[info] Updating
[info] Resolved  dependencies
[warn]
[warn]  Note: Some unresolved dependencies have extra attributes.  Check that these dependencies exist with the requested attributes.
[warn]          com.eed3si9n:sbt-assembly:1.2.0 (sbtVersion=1.0, scalaVersion=2.12)
[warn]
[warn]  Note: Unresolved dependencies path:
[error] sbt.librarymanagement.ResolveException: Error downloading com.eed3si9n:sbt-assembly;sbtVersion=1.0;scalaVersion=2.12:1.2.0
[error]   not found: https://my.company.com/nexus/repo/com/eed3si9n/sbt-assembly/1.2.0/sbt-assembly-1.2.0.pom
[error]         at lmcoursier.CoursierDependencyResolution.unresolvedWarningOrThrow(CoursierDependencyResolution.scala:344)
[error]         at lmcoursier.CoursierDependencyResolution.$anonfun$update$38(CoursierDependencyResolution.scala:313)
[error]         at scala.util.Either$LeftProjection.map(Either.scala:573)
[error]         at lmcoursier.CoursierDependencyResolution.update(CoursierDependencyResolution.scala:313)
[error]         at sbt.librarymanagement.DependencyResolution.update(DependencyResolution.scala:60)
[error]         at sbt.internal.LibraryManagement$.resolve$1(LibraryManagement.scala:60)
[error]         at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$12(LibraryManagement.scala:134)
[error]         at sbt.util.Tracked$.$anonfun$lastOutput$1(Tracked.scala:74)
[error]         at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$20(LibraryManagement.scala:147)
[error]         at scala.util.control.Exception$Catch.apply(Exception.scala:228)
[error]         at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$11(LibraryManagement.scala:147)
[error]         at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$11$adapted(LibraryManagement.scala:128)
[error]         at sbt.util.Tracked$.$anonfun$inputChangedW$1(Tracked.scala:220)
[error]         at sbt.internal.LibraryManagement$.cachedUpdate(LibraryManagement.scala:161)
[error]         at sbt.Classpaths$.$anonfun$updateTask0$1(Defaults.scala:3801)
[error]         at scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error]         at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:63)
[error]         at sbt.std.Transform$$anon$4.work(Transform.scala:69)
[error]         at sbt.Execute.$anonfun$submit$2(Execute.scala:283)
[error]         at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:24)
[error]         at sbt.Execute.work(Execute.scala:292)
[error]         at sbt.Execute.$anonfun$submit$1(Execute.scala:283)
[error]         at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error]         at sbt.CompletionService$$anon$2.call(CompletionService.scala:65)
[error]         at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error]         at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
[error]         at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error]         at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
[error]         at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
[error]         at java.base/java.lang.Thread.run(Thread.java:833)
[error] (update) sbt.librarymanagement.ResolveException: Error downloading com.eed3si9n:sbt-assembly;sbtVersion=1.0;scalaVersion=2.12:1.2.0
[error]   not found: https://my.company.com/nexus/repo/com/eed3si9n/sbt-assembly/1.2.0/sbt-assembly-1.2.0.pom
[warn] Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore? (default: r)

The error is right in that https://my.company.com/nexus/repo/com/eed3si9n/sbt-assembly/1.2.0/sbt-assembly-1.2.0.pom does not exist.

But where did sbt get the idea of trying that location?

FWIW, the artifact is at https://my.company.com/nexus/repo/com/eed3si9n/sbt-assembly_2.12_1.0/1.2.0/sbt-assembly-1.2.0.pom and I ultimately do want to point sbt to that, but I also want to learn to navigate where sbt is looking for artifacts.

[TomasMikula]

Sorry, wrong repo. Asked at sbt/sbt#7532