sbt add plugin error

Question

i've read all of the similar questions but neither of the suggestions fixes my problem. Perhaps i am unable to see it.

The problem is i have project/plugins.sbt and when i try to add for example

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.11.2")

it gives me

[error] (*:update) sbt.ResolveException: 
unresolved dependency: com.eed3si9n#sbt-assembly;0.11.2: not found

then i add

resolvers += "sonatype-releases" at "https://oss.sonatype.org/content/repositories/releases/"

but the error is same

my sbt version is

sbt launcher version 0.13.8

and scala version is

Scala code runner version 2.11.6 -- Copyright 2002-2013, LAMP/EPFL

Perhaps someone can point me the right direction. Thanks in advance.

EDIT: when i put

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.13.0")

to project/assembly.sbt i got the same error

actually i do not think the error is for sbt-assembly it gives the same sort of error when i try to add other plugins

[info] Resolving com.eed3si9n#sbt-assembly;0.13.0 ...
[warn]  module not found: com.eed3si9n#sbt-assembly;0.13.0
[warn] ==== local: tried
[warn]   .ivy2/local/com.eed3si9n/sbt-assembly/scala_2.11/sbt_0.13/0.13.0/ivys/ivy.xml
[warn] ==== public: tried
[warn]   https://repo1.maven.org/maven2/com/eed3si9n/sbt-assembly_2.11_0.13/0.13.0/sbt-assembly-0.13.0.pom
[warn] ==== Typesafe Repository: tried
[warn]   http://repo.typesafe.com/typesafe/releases/com/eed3si9n/sbt-assembly_2.11_0.13/0.13.0/sbt-assembly-0.13.0.pom
[info] Resolving jline#jline;2.12.1 ...
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  ::          UNRESOLVED DEPENDENCIES         ::
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  :: com.eed3si9n#sbt-assembly;0.13.0: not found
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn] 
[warn]  Note: Some unresolved dependencies have extra attributes.  Check that these dependencies exist with the requested attributes.
[warn]      com.eed3si9n:sbt-assembly:0.13.0 (sbtVersion=0.13, scalaVersion=2.11)
[warn] 
[warn]  Note: Unresolved dependencies path:
[warn]      com.eed3si9n:sbt-assembly:0.13.0 (sbtVersion=0.13, scalaVersion=2.11) (assembly.sbt#L2-3)
1.0

EDIT

Ok for the others that are careless like me in all the docs it says like project/plugins.sbt, or project/assembly.sbt, etc... actualy i thought "project" should be the project folder of the application but it is the [your_project_name]/project :( so all the mentioned conf should go in that directory.

thanks a lot for the replies..

Answer 1

sbt-assembly:

For sbt 0.13.6+ add sbt-assembly as a dependency in project/assembly.sbt:

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.13.0")

Answer 2

Maybe the problem is with the version of the plugin you want to use?

Try this:

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.13.0")