Use coffeescripted-sbt to compile coffeescript in multi-project build - coffeescript

Question

I have a multi project sbt build and I would like to use https://github.com/softprops/coffeescripted-sbt to compile my coffeescript to javascript, but it is not performing the tasks.
The code was taken from https://github.com/jeffmay/angular-play-multimodule-seed/tree/stackoverflow-17289043
With build.sbt
Even though it is not recommended, I mixed a build.sbt file in the project directory with my project objects in order to test if this plugin worked.
In build.sbt:
seq(coffeeSettings: _*)
When I ran:
$ sbt
[info] Loading project definition from /Users/jeffmay/code/righttrack/project
[info] Set current project to root (in build file:/Users/jeffmay/code/righttrack/)
> coffee
[success] Total time: 0 s, completed Jun 24, 2013 11:40:37 PM
> show coffee
[info] ArrayBuffer()
[success] Total time: 0 s, completed Jun 24, 2013 11:40:52 PM
> project web
[info] Set current project to web (in build file:/Users/jeffmay/code/righttrack/)
[web] $ coffee
[error] Not a valid command: coffee
[error] No such setting/task
[error] coffee
[error] ^
[web] $
What does ArrayBuffer() mean? Is that a silent failure (coffeescript returning the last expression that would otherwise be a return; of null?)
Multi Project Setup
For some context, my build is broken out like so...
In project/plugins.sbt:
// SBT community plugin resolver
resolvers += Resolver.url("sbt-plugin-releases",
new URL("http://scalasbt.artifactoryonline.com/scalasbt/sbt-plugin-releases/"))(Resolver.ivyStylePatterns)
// CoffeeScript compiler plugin
addSbtPlugin("me.lessis" % "coffeescripted-sbt" % "0.2.3")
In project/Modules.scala (my build object):
import sbt._
object Modules extends Build {
lazy val root = RootModule.project
lazy val api = ApiModule.project
lazy val web = WebModule.project
}
In the project/WebModule.scala:
object WebModule extends BaseModule {
// ... libraries dependencies and stuff
override def project = play.Project(moduleName, moduleVersion, libraries, file(location),
moduleSettings ++
Seq((resourceManaged in (Compile, CoffeeKeys.coffee)) <<= (crossTarget in Compile)(_ / "src" / "main" / "coffee"))
)
}
I use a project/BaseModule.scala to remove the clutter of the common elements of each module, but it isn't doing anything fancy.
With Build.scala
I remove the build.sbt stuff and put it into Build.scala via project/WebModule.scala by adding:
override def project = play.Project(moduleName, moduleVersion, libraries, file(location),
moduleSettings ++
coffeeSettings ++ // With the settings moved from build.sbt
Seq((resourceManaged in (Compile, CoffeeKeys.coffee)) <<= (crossTarget in Compile)(_ / "src" / "main" / "coffee"))
)
Then I give it a whirl
$ sbt
[info] Loading project definition from /Users/jeffmay/code/righttrack/project
[info] Set current project to root (in build file:/Users/jeffmay/code/righttrack/)
> coffee
[error] Not a valid command: coffee
[error] No such setting/task
[error] coffee
[error] ^
> project web
[info] Set current project to web (in build file:/Users/jeffmay/code/righttrack/)
[web] $ coffee
[success] Total time: 0 s, completed Jun 25, 2013 12:08:36 AM
[web] $ show coffee
[info] ArrayBuffer()
[success] Total time: 0 s, completed Jun 25, 2013 12:08:40 AM
I'm not seeing any changes after running the coffee command. Any ideas what the problem is?
Thanks!

Answer 1

See my dialog with softprops for more details: https://github.com/softprops/coffeescripted-sbt/issues/17
There were three problems with and one improvement to the code above.
I wasn't aggregating my web project into the root project.
I wasn't setting where to find the coffee script files.
Play uses "./app" as the sourceDirectory, so when I added the seemingly "correct" directory path of
sourceDirectory in (Compile, CoffeeKeys.coffee) <<= sourceDirectory { _ / "main" / "coffee" }
It was searching in "./app/src/main/coffee", which doesn't exist
I was able to improve this example by having the compiler manage the ./public directory, so that it could drop the compiled javascript sources in the recommended public/js directory for the Angular Seed Project.
You can see the full seed project example here: https://github.com/jeffmay/angular-play-multimodule-seed