Add specific scala file to the build.sbt not all the directory it is in

Question

so I have a git sub-module that I want to include some Scala files from in my project but I don't want to include the a whole directory just some specific Scala files who to change the following line or what to add in order to include some specific Scala files to the build.sbt

  unmanagedSourceDirectories in Compile ++=  addons.value.map(baseDirectory.value / _ /"")

Answer 1

Remove command unmanagedSourceDirectories in Compile ++=... and add command

sources in Compile ++= Seq("SpecificFile1.scala", "SpecificFile2.scala")
  .map(baseDirectory.value / "external_directory" / _)

if you want to add only external_directory/SpecificFile1.scala , external_directory/SpecificFile2.scala .

Or keep command unmanagedSourceDirectories in Compile += baseDirectory.value / "external_directory" and add command

sources in Compile --= Seq("ExcludedSpecificFile1.scala", "ExcludedSpecificFile2.scala")
  .map(baseDirectory.value / "external_directory" / _)

if you want to add everything from external_directory except external_directory/ExcludedSpecificFile1.scala , external_directory/ExcludedSpecificFile2.scala .