Centralize transform API functions.

packages/babel-core/src/index.js

@@ -1,64 +1,29 @@
-import fs from "fs";
-
-export { default as File } from "./transformation/file";
-export { default as buildExternalHelpers } from "./tools/build-external-helpers";
-export { default as template } from "babel-template";
-export { default as resolvePlugin } from "./helpers/resolve-plugin";
-export { default as resolvePreset } from "./helpers/resolve-preset";
+export File from "./transformation/file";
+export buildExternalHelpers from "./tools/build-external-helpers";
+export resolvePlugin from "./helpers/resolve-plugin";
+export resolvePreset from "./helpers/resolve-preset";
 
 export { version } from "../package";
 export { getEnv } from "./helpers/environment";
 
-import * as util from "./util";
-export { util };
+export * as util from "./util";
 
-import * as messages from "babel-messages";
-export { messages };
+export * as messages from "babel-messages";
+export * as types from "babel-types";
+export traverse from "babel-traverse";
+export template from "babel-template";
 
-import * as t from "babel-types";
-export { t as types };
-
-import traverse from "babel-traverse";
-export { traverse };
-
-import OptionManager from "./transformation/file/options/option-manager";
-export { OptionManager };
+export OptionManager from "./transformation/file/options/option-manager";
 
 export function Plugin(alias) {
   throw new Error(`The (${alias}) Babel 5 plugin is being run with Babel 6.`);
 }
 
-import { transform, analyse, transformFromAst } from "./transformation/pipeline";
-export { transform, analyse, transformFromAst };
+export {
+  transform,
+  analyse,
+  transformFromAst,
+  transformFile,
+  transformFileSync,
+} from "./transformation/pipeline";
 
-export function transformFile(filename: string, opts?: Object, callback: Function) {
-  if (typeof opts === "function") {
-    callback = opts;
-    opts = {};
-  }
-
-  opts.filename = filename;
-
-  fs.readFile(filename, function (err, code) {
-    let result;
-
-    if (!err) {
-      try {
-        result = transform(code, opts);
-      } catch (_err) {
-        err = _err;
-      }
-    }
-
-    if (err) {
-      callback(err);
-    } else {
-      callback(null, result);
-    }
-  });
-}
-
-export function transformFileSync(filename: string, opts?: Object = {}): string {
-  opts.filename = filename;
-  return transform(fs.readFileSync(filename, "utf8"), opts);
-}

packages/babel-core/src/transformation/pipeline.js

@@ -1,4 +1,6 @@
 /* global BabelFileResult, BabelFileMetadata */
+import fs from "fs";
+
 import normalizeAst from "../helpers/normalize-ast";
 import Plugin from "./plugin";
 import File from "./file";
@@ -31,3 +33,48 @@ export function transformFromAst(ast: Object, code: string, opts: Object): Babel
     return file.transform();
   });
 }
+
+export function transformFile(filename: string, opts?: Object, callback: Function) {
+  if (typeof opts === "function") {
+    callback = opts;
+    opts = {};
+  }
+
+  opts.filename = filename;
+
+  fs.readFile(filename, function (err, code) {
+    let result;
+
+    if (!err) {
+      try {
+        const file = new File(opts);
+        result = file.wrap(code, function () {
+          file.addCode(code);
+          file.parseCode(code);
+          return file.transform();
+        });
+      } catch (_err) {
+        err = _err;
+      }
+    }
+
+    if (err) {
+      callback(err);
+    } else {
+      callback(null, result);
+    }
+  });
+}
+
+export function transformFileSync(filename: string, opts?: Object = {}): string {
+  opts.filename = filename;
+
+  const code = fs.readFileSync(filename, "utf8");
+  const file = new File(opts);
+
+  return file.wrap(code, function () {
+    file.addCode(code);
+    file.parseCode(code);
+    return file.transform();
+  });
+}