delegate to babel-cli/babel-core if it's available #1244

index.js

@@ -0,0 +1,16 @@
+var path = require("path"
+  );
+var isCli = module.parent.filename.indexOf(path.sep + "babel" + path.sep) >= 0;
+
+if (!isCli && module.parent.filename !== __filename) {
+  try {
+    module.exports = require("babel/node_modules/babel-core");
+    return;
+  } catch (err) {
+    if (err.code !== "MODULE_NOT_FOUND") {
+      throw err;
+    }
+  }
+}
+
+module.exports = require("./lib/babel/api/node.js");

package.json

@@ -5,7 +5,6 @@
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
   "repository": "babel/babel",
-  "main": "lib/babel/api/node.js",
   "browser": {
     "./lib/babel/api/register/node.js": "./lib/babel/api/register/browser.js"
   },