Project directory for sbt sub-projects

Question

can sbt subproject have its own directory project? or can only the root project design the directory using auxiliary .scala files for assembly ?. Below is my current structure. /my-project/sub-projects/sub-project-1/build.sbtcannot access the objects defined in /my-project/sub-projects/sub-project-1/SubProjectHelper.scala.

/my-project
  build.sbt
  /projects
    Helper.scala
  sub-projects
    sub-project-1
      build.sbt
      /projects
        SubProjectHelper.scala

Update: The following sbt definition in subproject-1 / build.sbt

lazy val localhost = (project in file(".")).settings (
    name := """localhost""",
    version := Common.version,
    scalaVersion := Common.scalaVersion,
    libraryDependencies ++= Common.dependencies,
    libraryDependencies ++= Localhost.dependencies
)

does not work with error below

    libraryDependencies ++= Localhost.dependencies
                            ^
sbt.compiler.EvalException: Type error in expression
    at sbt.compiler.Eval.checkError(Eval.scala:384)
    at sbt.compiler.Eval.compileAndLoad(Eval.scala:183)
    at sbt.compiler.Eval.evalCommon(Eval.scala:152)
    at sbt.compiler.Eval.evalDefinitions(Eval.scala:122)
    at sbt.EvaluateConfigurations$.evaluateDefinitions(EvaluateConfigurations.scala:271)
    at sbt.EvaluateConfigurations$.evaluateSbtFile(EvaluateConfigurations.scala:109)
    at sbt.Load$.sbt$Load$$loadSettingsFile$1(Load.scala:712)

Common is defined in / my -project / projects / Common.scala and has no problems. But Localhost is defined in / my -project / sub-projects / sub-project-1 / projects / SubProjectHelper.scala is not resolved correctly in the sub-project-1 build.sbt file

Answer 1

, , sub-projects dir, sub-project-1 my-project dir.

Answer 2

( , , scala/scala-seed.g8). s, .

projects project.