scala.build.preprocessing.JavaPreprocessor.scala Maven / Gradle / Ivy

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package scala.build.preprocessing

import com.virtuslab.using_directives.custom.model.UsingDirectiveKind

import java.nio.charset.StandardCharsets

import scala.build.EitherCps.{either, value}
import scala.build.errors.BuildException
import scala.build.options.BuildRequirements
import scala.build.preprocessing.ExtractedDirectives.from
import scala.build.preprocessing.ScalaPreprocessor._
import scala.build.{Inputs, Logger}

case object JavaPreprocessor extends Preprocessor {
  def preprocess(
    input: Inputs.SingleElement,
    logger: Logger
  ): Option[Either[BuildException, Seq[PreprocessedSource]]] =
    input match {
      case j: Inputs.JavaFile => Some(either {
          val content   = value(PreprocessingUtil.maybeRead(j.path))
          val scopePath = ScopePath.fromPath(j.path)
          val ExtractedDirectives(_, directives0) =
            value(from(
              content.toCharArray,
              Right(j.path),
              logger,
              Array(UsingDirectiveKind.PlainComment, UsingDirectiveKind.SpecialComment),
              scopePath
            ))
          val updatedOptions = value(DirectivesProcessor.process(
            directives0,
            usingDirectiveHandlers,
            Right(j.path),
            scopePath,
            logger
          ))
          Seq(PreprocessedSource.OnDisk(
            j.path,
            Some(updatedOptions.global),
            Some(BuildRequirements()),
            Nil,
            None
          ))
        })
      case v: Inputs.VirtualJavaFile =>
        val content = new String(v.content, StandardCharsets.UTF_8)
        val s = PreprocessedSource.InMemory(
          Left(v.source),
          v.subPath,
          content,
          0,
          None,
          None,
          Nil,
          None,
          v.scopePath
        )
        Some(Right(Seq(s)))

      case _ => None
    }
}