Restore public API of resolvePlugin/resolvePreset (#16888)

* Restore public API of `resolvePlugin`/`resolvePreset`

* Prettier

* Add test

packages/babel-core/src/index.ts

@@ -9,7 +9,14 @@ export const version = PACKAGE_JSON.version;
 export { default as File } from "./transformation/file/file.ts";
 export type { default as PluginPass } from "./transformation/plugin-pass.ts";
 export { default as buildExternalHelpers } from "./tools/build-external-helpers.ts";
-export { resolvePlugin, resolvePreset } from "./config/files/index.ts";
+
+import * as resolvers from "./config/files/index.ts";
+// For backwards-compatibility, we expose the resolvers
+// with the old API.
+export const resolvePlugin = (name: string, dirname: string) =>
+  resolvers.resolvePlugin(name, dirname, false).filepath;
+export const resolvePreset = (name: string, dirname: string) =>
+  resolvers.resolvePreset(name, dirname, false).filepath;
 
 export { getEnv } from "./config/helpers/environment.ts";
 
@@ -30,47 +37,47 @@ export type Visitor<S = unknown> = import("@babel/traverse").Visitor<S>;
 
 export {
   createConfigItem,
-  createConfigItemSync,
   createConfigItemAsync,
+  createConfigItemSync,
 } from "./config/index.ts";
 
 export {
-  loadPartialConfig,
-  loadPartialConfigSync,
-  loadPartialConfigAsync,
   loadOptions,
   loadOptionsAsync,
+  loadPartialConfig,
+  loadPartialConfigAsync,
+  loadPartialConfigSync,
 } from "./config/index.ts";
 import { loadOptionsSync } from "./config/index.ts";
 export { loadOptionsSync };
 
 export type {
   CallerMetadata,
+  ConfigItem,
   InputOptions,
   PluginAPI,
   PluginObject,
   PresetAPI,
   PresetObject,
-  ConfigItem,
 } from "./config/index.ts";
 
 export {
+  type FileResult,
   transform,
-  transformSync,
   transformAsync,
-  type FileResult,
+  transformSync,
 } from "./transform.ts";
 export {
   transformFile,
-  transformFileSync,
   transformFileAsync,
+  transformFileSync,
 } from "./transform-file.ts";
 export {
   transformFromAst,
-  transformFromAstSync,
   transformFromAstAsync,
+  transformFromAstSync,
 } from "./transform-ast.ts";
-export { parse, parseSync, parseAsync } from "./parse.ts";
+export { parse, parseAsync, parseSync } from "./parse.ts";
 
 /**
  * Recommended set of compilable extensions. Not used in @babel/core directly, but meant as

packages/babel-core/test/resolution.js

@@ -506,4 +506,20 @@ describe("addon resolution", function () {
       ).code,
     ).toBe(`"ESM"`);
   });
+
+  it("resolvePreset", function () {
+    expect(
+      babel.resolvePreset("@babel/foo", path.join(base, "babel-org-paths")),
+    ).toMatch(
+      /babel-org-paths[\\/]node_modules[\\/]@babel[\\/]preset-foo[\\/]index.js/,
+    );
+  });
+
+  it("resolvePlugin", function () {
+    expect(
+      babel.resolvePlugin("@babel/foo", path.join(base, "babel-org-paths")),
+    ).toMatch(
+      /babel-org-paths[\\/]node_modules[\\/]@babel[\\/]plugin-foo[\\/]index.js/,
+    );
+  });
 });