ScalafmtSbtReporter.scala

package org.scalafmt.sbt

import java.io.PrintWriter
import java.io.OutputStreamWriter
import java.nio.file.Path

import org.scalafmt.interfaces.ScalafmtReporter
import sbt.internal.util.MessageOnlyException
import sbt.util.Logger

import scala.util.control.NoStackTrace

class ScalafmtSbtReporter(log: Logger, out: OutputStreamWriter)
    extends ScalafmtReporter {
  override def error(file: Path, message: String): Unit = {
    throw new MessageOnlyException(s"$message: $file")
  }

  override def error(file: Path, e: Throwable): Unit = {
    if (e.getMessage != null) {
      error(file, e.getMessage)
    } else {
      throw new FailedToFormat(file.toString, e)
    }
  }

  override def excluded(file: Path): Unit =
    log.debug(s"file excluded: $file")

  override def parsedConfig(config: Path, scalafmtVersion: String): Unit =
    log.debug(s"parsed config (v$scalafmtVersion): $config")

  override def downloadWriter(): PrintWriter = new PrintWriter(out)
  override def downloadOutputStreamWriter(): OutputStreamWriter = out

  private class FailedToFormat(filename: String, cause: Throwable)
      extends Exception(filename, cause)
      with NoStackTrace
}