Add scalafix rule for renaming EitherT.liftT

scalafix/README.md

@@ -20,6 +20,8 @@ sbt scalafix github:typelevel/cats/v1.0.0
 
 - [x] The creation methods (left, right, apply, pure, etc.) in EitherT were improved to take less type arguments.
 
+- [x] EitherT.liftT was renamed to EitherT.liftF
+
 - [x] CartesianBuilder (i.e. |@|) syntax is deprecated, use the apply syntax on tuples instead. E.g. (x |@| y |@| z).map(...) should be replaced by (x, y, z).mapN(...)
 
 - [x] Free.suspend is renamed to Free.defer for consistency.

scalafix/input/src/main/scala/fix/v1_0_0/RenameEitherTLiftT.scala

@@ -0,0 +1,15 @@
+/*
+rule = "scala:fix.v1_0_0.RenameEitherTLiftT"
+ */
+package fix
+package to1_0_0
+
+object RenameEitherTLiftTTests {
+  import cats.instances.option._
+  import cats.data._
+  import cats.data.EitherT._
+
+  val fa: Option[Int] = Some(42)
+  val et1: EitherT[Option, Nothing, Int] = EitherT.liftT(fa)
+  val et2: EitherT[Option, Nothing, Int] = liftT(fa)
+}

scalafix/output/src/main/scala/fix/v1_0_0/RenameEitherTLiftT.scala

@@ -0,0 +1,12 @@
+package fix
+package to1_0_0
+
+object RenameEitherTLiftTTests {
+  import cats.instances.option._
+  import cats.data._
+  import cats.data.EitherT._
+
+  val fa: Option[Int] = Some(42)
+  val et1: EitherT[Option, Nothing, Int] = EitherT.liftF(fa)
+  val et2: EitherT[Option, Nothing, Int] = liftF(fa)
+}

scalafix/rules/src/main/scala/fix/Cats_v1_0_0.scala

@@ -197,3 +197,14 @@ case class RemoveSplit(index: SemanticdbIndex)
   }
 
 }
+
+// ref: https://github.com/typelevel/cats/pull/1947
+case class RenameEitherTLiftT(index: SemanticdbIndex)
+  extends SemanticRule(index, "RenameEitherTLiftT") {
+
+  override def fix(ctx: RuleCtx): Patch =
+    ctx.replaceSymbols(
+      "_root_.cats.data.EitherTFunctions.liftT." -> "liftF"
+    )
+
+}