Macro to read resources at compile time

Resources.scala

package fastparse.protobuf

import java.nio.file.{Files, Paths}

import scala.reflect.macros.whitebox
import scala.jdk.CollectionConverters._

object Resources {

  def readResource(path: String): String = macro Resources.readResourceImpl

  def readResourceImpl(c: whitebox.Context)(path: c.Expr[String]): c.Expr[String] = {
    import c.universe._
    val Literal(Constant(thePath: String)) = path.tree
    val resourcePath = Paths.get(this.getClass.getResource("/" + thePath).toURI)
    val body = Files.readAllLines(resourcePath).asScala.mkString("\n")


    c.Expr[String](Literal(Constant(body)))
  }
}