scalafix.internal.config.LazySemanticdbIndex.scala Maven / Gradle / Ivy

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package scalafix.internal.config

import scalafix.SemanticdbIndex
import org.langmeta.io.AbsolutePath

// The challenge when loading a rule is that 1) if it's semantic it needs a
// index constructor argument and 2) we don't know upfront if it's semantic.
// For example, to know if a classloaded rules is semantic or syntactic
// we have to test against it's Class[_]. For default rules, the interface
// to detect if a rule is semantic is different.
// LazySemanticdbIndex allows us to delay the computation of a index right up until
// the moment we instantiate the rule.
//type LazySemanticdbIndex = RuleKind => Option[SemanticdbIndex]
class LazySemanticdbIndex(
    f: RuleKind => Option[SemanticdbIndex] = _ => None,
    val reporter: ScalafixReporter = ScalafixReporter.default,
    // The working directory when compiling file:relativepath/
    val workingDirectory: AbsolutePath = AbsolutePath.workingDirectory,
    // Additional classpath entries to use when compiling/classloading rules.
    val toolClasspath: List[AbsolutePath] = Nil
) extends Function[RuleKind, Option[SemanticdbIndex]] {
  override def apply(v1: RuleKind): Option[SemanticdbIndex] = f(v1)
}

object LazySemanticdbIndex {
  lazy val empty: LazySemanticdbIndex = new LazySemanticdbIndex()
  def apply(
      f: RuleKind => Option[SemanticdbIndex],
      cwd: AbsolutePath = AbsolutePath.workingDirectory): LazySemanticdbIndex =
    new LazySemanticdbIndex(f, ScalafixReporter.default, cwd, Nil)
}