trying to use sbt assembly - sbt

Question

sbt version is 0.13.9 and scala 2.11.7/ I know previous versions of sbt relied on scala 2.10 - is that still the case? I have a Java project for which I added an assembly.sbt file in the project directory (as per the sbt assembly instructions for this version of sbt assembly):
addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.2")
I ran sbt reload/clean as well as compile. However, when I try to run assembly, I get the following exception:
> assembly
[error] Not a valid command: assembly
[error] Not a valid project ID: assembly
[error] Expected ':' (if selecting a configuration)
[error] Not a valid key: assembly
[error] assembly
[error] ^
what step(s) a I missing before I can create a runnable jar for my java project using sbt?
I can setup a merge strategy if one is needed but I received a different exception when I tried using that. Any helpful suggestions would be quite welcome.
Update
I had created the assemly.sbt file in the wrong location. When I placed the assembly.sbt file in the same directory as the build.sbt, and ran reload/compile, I got the following error:
[trace] Stack trace suppressed: run last *:update for the full output.
[error] (*:update) sbt.ResolveException: unresolved dependency: com.eed3si9n#sbt-assembly;0.14.2: not found
[error] Total time: 2 s, completed Mar 13, 2016 3:20:02 PM
**running with last *:update**
[warn] Note: Some unresolved dependencies have extra attributes. Check that these dependencies exist with the requested attributes.
[warn] com.eed3si9n:sbt-assembly:0.14.2 (scalaVersion=2.11, sbtVersion=0.13)
[warn]
[warn] Note: Unresolved dependencies path:
[warn] com.eed3si9n:sbt-assembly:0.14.2 (scalaVersion=2.11, sbtVersion=0.13) (/home/me/test-server/assembly.sbt#L1-2)
[warn] +- com.test:test-server_2.11:1.0.0
sbt.ResolveException: unresolved dependency: com.eed3si9n#sbt-assembly;0.14.2: not found
at sbt.IvyActions$.sbt$IvyActions$$resolve(IvyActions.scala:294)
at sbt.IvyActions$$anonfun$updateEither$1.apply(IvyActions.scala:191)
at sbt.IvyActions$$anonfun$updateEither$1.apply(IvyActions.scala:168)
at sbt.IvySbt$Module$$anonfun$withModule$1.apply(Ivy.scala:155)
at sbt.IvySbt$Module$$anonfun$withModule$1.apply(Ivy.scala:155)
at sbt.IvySbt$$anonfun$withIvy$1.apply(Ivy.scala:132)
at sbt.IvySbt.sbt$IvySbt$$action$1(Ivy.scala:57)
at sbt.IvySbt$$anon$4.call(Ivy.scala:65)
at xsbt.boot.Locks$GlobalLock.withChannel$1(Locks.scala:93)
at xsbt.boot.Locks$GlobalLock.xsbt$boot$Locks$GlobalLock$$withChannelRetries$1(Locks.scala:78)
at xsbt.boot.Locks$GlobalLock$$anonfun$withFileLock$1.apply(Locks.scala:97)
at xsbt.boot.Using$.withResource(Using.scala:10)
at xsbt.boot.Using$.apply(Using.scala:9)
at xsbt.boot.Locks$GlobalLock.ignoringDeadlockAvoided(Locks.scala:58)
at xsbt.boot.Locks$GlobalLock.withLock(Locks.scala:48)
at xsbt.boot.Locks$.apply0(Locks.scala:31)
at xsbt.boot.Locks$.apply(Locks.scala:28)
at sbt.IvySbt.withDefaultLogger(Ivy.scala:65)
at sbt.IvySbt.withIvy(Ivy.scala:127)
at sbt.IvySbt.withIvy(Ivy.scala:124)
at sbt.IvySbt$Module.withModule(Ivy.scala:155)
at sbt.IvyActions$.updateEither(IvyActions.scala:168)
at sbt.Classpaths$$anonfun$sbt$Classpaths$$work$1$1.apply(Defaults.scala:1392)
at sbt.Classpaths$$anonfun$sbt$Classpaths$$work$1$1.apply(Defaults.scala:1388)
at sbt.Classpaths$$anonfun$doWork$1$1$$anonfun$90.apply(Defaults.scala:1422)
at sbt.Classpaths$$anonfun$doWork$1$1$$anonfun$90.apply(Defaults.scala:1420)
at sbt.Tracked$$anonfun$lastOutput$1.apply(Tracked.scala:37)
at sbt.Classpaths$$anonfun$doWork$1$1.apply(Defaults.scala:1425)
at sbt.Classpaths$$anonfun$doWork$1$1.apply(Defaults.scala:1419)
at sbt.Tracked$$anonfun$inputChanged$1.apply(Tracked.scala:60)
at sbt.Classpaths$.cachedUpdate(Defaults.scala:1442)
at sbt.Classpaths$$anonfun$updateTask$1.apply(Defaults.scala:1371)
at sbt.Classpaths$$anonfun$updateTask$1.apply(Defaults.scala:1325)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
at sbt.std.Transform$$anon$4.work(System.scala:63)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
at sbt.Execute.work(Execute.scala:235)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226)
at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
[error] (*:update) sbt.ResolveException: unresolved dependency: com.eed3si9n#sbt-assembly;0.14.2: not found
Project structure
I will add screenshots later. For now, please bear with me.
I tried creating the assembly.sbt file inside the project subdirectory - it did not work. Then I added it to the plugins.sbt inside the same project subdirectory. When it did not work, I copied the assembly.sbt and plugin.sbt into the root directory of the project but it did not solve the issue.
Project directory: test-server
I have added assembly.sbt and build.sbt inside /test-server
I have also tried adding it ti /test-server/project
Neither worked. I am reasonably sure I am doing something wrong or missing something in my config. Kindly share your thoughts as to what needs to be done to resolve the issue.
assembly.sbt
addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.2")

Answer 1

The issue was due to a typo in my assembly.sbt file. The assembly.sbt file needs to be inside the project subdirectory i.e. if your project root directory is test-server, one needs to place the assembly.sbt file inside the test-server/project subdirectory.
addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.2")