Scalafix Rewrites for Scala

How to run the rewrites

Add the sbt-scalafix sbt plugin, with the SemanticDB compiler plugin enabled (official docs):

// project/plugins.sbt
addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.11.0")

// build.sbt
inThisBuild(List(
  semanticdbEnabled := true,
  semanticdbOptions += "-P:semanticdb:synthetics:on", // make sure to add this
  semanticdbVersion := scalafixSemanticdb.revision,
  scalafixScalaBinaryVersion := CrossVersion.binaryScalaVersion(scalaVersion.value),
))

Then run the desired rewrite(s) (official docs), in sbt:

> scalafixAll dependency:[email protected]:scala-rewrites:<version>

You can also add the following to your build.sbt:

ThisBuild / scalafixDependencies += "org.scala-lang" %% "scala-rewrites" % "<version>"

and then:

> scalafixAll fix.scala213.ExplicitNonNullaryApply

To develop/contribute to any of the rewrites

sbt ~tests/test
# edit rewrites/src/main/scala/...