CODEWITHSUNDEEP
scalacode-generationsbt
Pablo Lalloni
Pablo Lalloni

Reputation: 2755

Can not generate source code with SBT 0.11 from "Full Configuration"

Based on sbt 0.11.0 documentation available ("Common Tasks" wiki page and others) and after seeing how this is done in Scalaz SBT build and in Scalate SBT build I can't figure out why my simple example does not work:

import sbt._
import Keys._

object MyBuild extends Build {

  lazy val project = Project(
    id = "root", 
    base = file("."),
    settings = Defaults.defaultSettings ++ Seq(
      (sourceGenerators in Compile) <+= (sourceManaged in Compile) map { dir =>
        val file = dir / "bla.scala"
        IO.write(file, """object Bla extends App { println("bla!") }""")
        Seq(file)
      }
    )
  )

}

Putting that on project/build.scala of an empty project and running "sbt compile" generates/compiles nothing and "sbt run" complains that it can not find any main class.

Now, if I put the setting in the "quick configuration" build.sbt as follows instead of the full configuration as above, it just works. 

(sourceGenerators in Compile) <+= (sourceManaged in Compile) map { dir =>
    val file = dir / "bla.scala"
    IO.write(file, """object Bla extends App { println("bla!") }""")
    Seq(file)
}

Obviously, needing to create a build.sbt file in a "full configuration"-only project is far from desirable, at least for me.

So, why this setting is not working in the full configuration?

Upvotes: 26

Views: 698

Answers (1)

David
David

Reputation: 2399

Just copy paste your code in file project/Build.scala and run it with sbt run and that works.

Are your sure that your Build.scala is correctly located (must be in project directory) ?

Upvotes: 2

Related Questions