examples/scala-js/tools/jvm/src/main/scala/scala/scalajs/tools/optimizer/LoggerErrorManager.scala


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package scala.scalajs.tools.optimizer

import com.google.javascript.jscomp.{ BasicErrorManager, CheckLevel, JSError }

import scala.scalajs.tools.logging.Logger

/** A Google Closure Error Manager that forwards to a tools.logging.Logger */
class LoggerErrorManager(private val log: Logger) extends BasicErrorManager {

  /** Ugly hack to disable FRACTIONAL_BITWISE_OPERAND warnings. Since its
    * DiagnosticType (PeepholeFoldConstants.FRACTIONAL_BITWISE_OPERAND) is
    * package private.
    */
  override def report(level: CheckLevel, error: JSError): Unit = {
    if (error.getType.key == "JSC_FRACTIONAL_BITWISE_OPERAND")
      super.report(CheckLevel.OFF, error)
    else
      super.report(level, error)
  }

  def println(level: CheckLevel, error: JSError): Unit = level match {
    case CheckLevel.WARNING => log.warn (s"Closure: ${error}")
    case CheckLevel.ERROR   => log.error(s"Closure: ${error}")
    case CheckLevel.OFF     =>
  }

  protected def printSummary(): Unit = {
    val msg = s"Closure: ${getErrorCount} error(s), ${getWarningCount} warning(s)"

    if (getErrorCount > 0)
      log.error(msg)
    else if (getWarningCount > 0)
      log.warn(msg)
    else
      log.info(msg)
  }

}