How to create one standalone jar using sbt?

[thinkerou]

• Background:

  Using the sbt package command, it creates a jar file but this jar will be without any dependencies which it can not run.
  To run it necessary to specify classpath arg to the libraries.

• Wish:

  Maybe we wish a standalone runnable jar file.
  So we need to add the dependencies. To do this we can use assembly plugin for sbt, please see sbt-assembly, what it will do is create one jar file containing the project class files along with all of its dependencies. If we write an application, what we get is a double-clickable jar that we can execute from anywhere.

• Solved:

  Afterward we can just run the sbt assembly command, it provides a fat jar file with all dependencies that you can deploy and run anywhere and at any time.