Extract from BuiltinCommands object in SBT

set.scala

def set = Command(SetCommand, setBrief, setDetailed)(setParser) {
  case (s, (all, arg)) =>
    val extracted = Project extract s
    import extracted._
    val dslVals = extracted.currentUnit.unit.definitions.dslDefinitions
    // TODO - This is possibly inefficient (or stupid). We should try to only attach the
    // classloader + imports NEEDED to compile the set command, rather than
    // just ALL of them.
    val ims = (imports(extracted) ++ dslVals.imports.map(i => (i, -1)))
    val cl = dslVals.classloader(currentLoader)
    val settings = EvaluateConfigurations.evaluateSetting(
      session.currentEval(),
      "<set>",
      ims,
      arg,
      LineRange(0, 0)
    )(cl)
    val setResult = if (all) SettingCompletions.setAll(extracted, settings) else SettingCompletions.setThis(s, extracted, settings, arg)
    s.log.info(setResult.quietSummary)
    s.log.debug(setResult.verboseSummary)
    reapply(setResult.session, structure, s)
}