multiproject-sbt-test

Figuring out how to have multiple projects with no base root project.

The idea behind this is to have a root build that reaches into a specified subproject as if it were the root project itself. So instead of always having to call something like sbt subproject/run one could instead just run sbt run.

Only useful if that subproject is the main entry point to all the subprojects, but hey -- prototypes gotta cut corners somewhere. ;)

Instructions

Just run sbt run or sbt build or whatever. I dunno man, just look in the main build.sbt file to see what's going on.

Extra

This is what the error message looks like if you don't have a root project defined.

[warn] No main class detected
java.lang.RuntimeException: No main class detected.
    at scala.sys.package$.error(package.scala:27)
    [trace] Stack trace suppressed: run last multiproject-sbt-test/compile:run for the full output.
    [error] (multiproject-sbt-test/compile:run) No main class detected.
    [error] Total time: 0 s, completed Feb 20, 2015 10:56:13 PM

If you're trying to do this with a play project, you might end up getting something that looks like this (see issue 3484):

[error] application - 

! Internal server error, for (GET) [/] ->

java.util.NoSuchElementException: None.get
    at scala.None$.get(Option.scala:313) ~[scala-library-2.11.5.jar:na]
    at scala.None$.get(Option.scala:311) ~[scala-library-2.11.5.jar:na]
    at play.PlayReloader$$anon$1.reload(PlayReloader.scala:89) ~[na:na]
    at play.core.ReloadableApplication$$anonfun$get$1.apply(ApplicationProvider.scala:122) ~[play_2.11-2.3.5.jar:2.3.5]
    at play.core.ReloadableApplication$$anonfun$get$1.apply(ApplicationProvider.scala:120) ~[play_2.11-2.3.5.jar:2.3.5]
[warn] play - No application found at invoker init