libraryDependencies for com.eed3si9n#sbt-assembly;0.13.0: not found - scala

Question

I am building a sbt plugin and want to reference assembly task in the sbt-assembly plugin ( to be dependent on my task)
to do this i need to reference it as a library ( as opposed to a plugin), and somehow sbt is not able to resolve it as a libraryDepdendencies
this is what my sbt looks like
sbtPlugin := true
name := "my-sbt-plugin"
scalaVersion := "2.10.6"
sbtVersion := "0.13.0"
resolvers ++= Seq(Resolver.sbtPluginRepo("releases"), Resolver.sbtPluginRepo("snapshots"))
libraryDependencies ++= Seq(
"com.eed3si9n" % "sbt-assembly" % "0.13.0")
the output looks like
Resolving com.eed3si9n#sbt-assembly;0.13.0 ...
[warn] module not found: com.eed3si9n#sbt-assembly;0.13.0
[warn] ==== typesafe-ivy-releases: tried
[warn] https://repo.typesafe.com/typesafe/ivy-releases/com.eed3si9n/sbt-assembly/0.13.0/ivys/ivy.xml
[warn] ==== sbt-plugin-releases: tried
[warn] https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/com.eed3si9n/sbt-assembly/0.13.0/ivys/ivy.xml
[warn] ==== local: tried
[warn] /Users/myuser/.ivy2/local/com.eed3si9n/sbt-assembly/0.13.0/ivys/ivy.xml
[warn] ==== public: tried
[warn] https://repo1.maven.org/maven2/com/eed3si9n/sbt-assembly/0.13.0/sbt-assembly-0.13.0.pom
[warn] ==== sbt-plugin-releases: tried
[warn] https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/com.eed3si9n/sbt-assembly/0.13.0/ivys/ivy.xml
[warn] ==== sbt-plugin-snapshots: tried
[warn] https://repo.scala-sbt.org/scalasbt/sbt-plugin-snapshots/com.eed3si9n/sbt-assembly/0.13.0/ivys/ivy.xml
[info] Resolving org.fusesource.jansi#jansi;1.4 ...
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[warn] :: UNRESOLVED DEPENDENCIES ::
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[warn] :: com.eed3si9n#sbt-assembly;0.13.0: not found
[warn] ::::::::::::::::::::::::::::::::::::::::::::::

Answer 1

It is not resolving because you did not specify a scala version. It should be something like:
libraryDependencies ++= Seq(
"com.eed3si9n" % "sbt-assembly_2.11" % "0.13.0"
)
Or, to automatically get the scala version used in project:
libraryDependencies ++= Seq(
// notice the double %% here
"com.eed3si9n" %% "sbt-assembly" % "0.13.0"
)
But, sbt-assembly is not supposed to be installed that way. The docs show that you must add the following line to your project/plugins.sbt instead:
addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.2")
If developing an sbt plugin, the addSbtPlugin line has to go directly into ./build.sbt.

Answer 2

In my case, correcting the sbt assembly version from 14.3 to 14.5 did the trick. Please check what's yours and try that.
So in the project\assembly.sbt , it was like-
addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.3")
Then I changed it to-
addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.5")
Hope it helps!

Answer 3

It is not resolving for Scala - 2.12.
Add the following line in - project/plugins.sbt -
addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.5")
resolvers += Resolver.url("bintray-sbt-plugins", url("http://dl.bintray.com/sbt/sbt-plugin-releases"))(Resolver.ivyStylePatterns)
To find the proper path, try the following -
https://dl.bintray.com/sbt/sbt-plugin-releases/com.eed3si9n/sbt-assembly/scala_<version>/
So, using version 2.12, the resolvable path can be found as below -
https://dl.bintray.com/sbt/sbt-plugin-releases/com.eed3si9n/sbt-assembly/scala_2.12/sbt_1.0/0.14.5/ivys/

Answer 4

In addition to the above suggestions I had to add
resolvers += Resolver.url("bintray-sbt-plugins", url("http://dl.bintray.com/sbt/sbt-plugin-releases"))(Resolver.ivyStylePatterns)
to project/plugins.sbt.

Answer 5

I had the same issues, All I did was, remove the ==>
addSbtPlugin("com.eed3si9n" %% "sbt-assembly" % "0.14.5")
line from build.sbt and copied to another file, named assembly.sbt at the same project level, where build.sbt is.
It resolved the error.(After 3 hours of reading all posts on the internet. :-) )