SBT plugin - console - relax compiler options

FixScalacOptionsInConsole.scala

import sbt._

object FixScalacOptionsInConsole extends AutoPlugin {
  import Keys._

  override def requires = plugins.JvmPlugin
  override def trigger = allRequirements

  override lazy val projectSettings = Seq(
    Compile / console / scalacOptions ~= filter,
    Test / console / scalacOptions ~= filter)

    // turn these off for console…
  val removes = Set("-feature", "-unchecked", "-Xfatal-warnings")
  val removeStarts = Set("-opt:", "-Xlint:", "-Ywarn")

  def filter: Seq[String] => Seq[String] =
    _.filterNot(removes contains _)
     .filterNot(s => removeStarts.exists(s startsWith _))
}

Original credit for this goes to some answer to a question I just happened to run across one day on StackOverflow. Couldn't find the question again for the life of me, so I'm keeping this here for posterity, and my own ease-of-mind.

This is slightly modified from the original answer, to provide the flags & options to remove in Sets, so they can be easily modified without affecting the logic.

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To use this, simply copy/pasta the code into a new Scala source file in your project/ directory. SBT will compile it and use it as a project plugin automatically.