Disable unused scalac linters only in IntelliJ

disable-linters-sbt-tpolecat-intellij.md

sbt-tpolecat IntelliJ exemptions

This plugin lets you enforce strict linting rules and iterate quickly in IntelliJ at the same time.

Configure your build with sbt-tpolecat to prevent unused imports, unused parameters etc. to reach main. Adding the plugin below causes the following behavior:

• All linters are enforced in sbt
• The -Wunused:* flags are not enforced in IntelliJ

// File: ~/.sbt/1.0/plugins/DisableLintersIntelliJ.scala
package localsbt

import sbt.{AutoPlugin, Def, Plugins}
import sbt.Keys._
import sbt.plugins.JvmPlugin

import scala.util.Try

object DisableLintersIntelliJ extends AutoPlugin {
  override def trigger  = allRequirements
  override def requires = {
    Try(Class.forName("io.github.davidgregory084.TpolecatPlugin$"))
      .map(_.asInstanceOf[Plugins])
      .getOrElse(JvmPlugin)
  }

  override def projectSettings: Seq[Def.Setting[_]] = Seq(
    scalacOptions --= {
      if (System.getProperty("idea.managed") == "true")
        Seq(
          "-Wunused:implicits",
          "-Wunused:explicits",
          "-Wunused:imports",
          "-Wunused:locals",
          "-Wunused:params",
          "-Wunused:patvars",
          "-Wunused:privates"
        ) else Seq.empty
    }
  )
}