From 638f4647a4c05b0418e5105b6d36cf8af0e54981 Mon Sep 17 00:00:00 2001
From: Brice Jaglin <bjaglin@gmail.com>
Date: Sun, 11 Jun 2023 19:00:37 +0200
Subject: [PATCH] expose low-level API for scalafix repo dogfooding

---
 .../internal/sbt/ScalafixInterface.scala      | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/main/scala/scalafix/internal/sbt/ScalafixInterface.scala b/src/main/scala/scalafix/internal/sbt/ScalafixInterface.scala
index 1a31a795..4faaefdd 100644
--- a/src/main/scala/scalafix/internal/sbt/ScalafixInterface.scala
+++ b/src/main/scala/scalafix/internal/sbt/ScalafixInterface.scala
@@ -159,4 +159,25 @@ object ScalafixInterface {
           )
         )
     })
+
+  def fromClassloader(
+      classloader: () => ClassLoader,
+      logger: Logger = ConsoleLogger(System.out)
+  ): () => ScalafixInterface = () => {
+    val callback = new ScalafixLogger(logger)
+    val scalafixArguments = ScalafixAPI
+      .classloadInstance(classloader())
+      .newArguments()
+      .withMainCallback(callback)
+    val printStream =
+      new PrintStream(
+        LoggingOutputStream(
+          logger,
+          Level.Info
+        )
+      )
+    new ScalafixInterface(scalafixArguments, Nil)
+      .withArgs(Arg.PrintStream(printStream))
+  }
+
 }