Reference scala file from build.sbt

Question

I have the following problem: I need to write a file into a build directory with the content that is defined in the project sbt is going to build.

prj
 |
 |_src/main/scala/FancyScalaFile.scala
 |
 |_build.sbt
 |
 |_project/build.properties

Here is how the FancyScalaFile.scala looks like

object FancyScalaFile {

    def extractString: String() = //...
}

Is there a way to call extractString from build.sbt ?

Answer 1

Yes, you can add additional source directory to project/build.sbt (create this file if it doesn't exist; do not confuse it with build.sbt in the project root directory)

Compile / unmanagedSourceDirectories += baseDirectory.value / ".." / "src" / "main" / "scala"

After that you'll be able to call FancyScalaFile.extractString() in build.sbt .

For example if FancyScalaFile is

object FancyScalaFile {
  def extractString(): String = "scala-reflect"
}

then you can write the following in build.sbt

libraryDependencies += scalaOrganization.value % FancyScalaFile.extractString() % scalaVersion.value

and project is built successfully adding scala-reflect dependency.