add store class

packages/babel-core/src/store.js

@@ -0,0 +1,24 @@
+export default class Store {
+  dynamicData        = {};
+  data               = {};
+
+  set(key: string, val): any {
+    return this.data[key] = val;
+  }
+
+  setDynamic(key: string, fn: Function) {
+    this.dynamicData[key] = fn;
+  }
+
+  get(key: string): any {
+    var data = this.data[key];
+    if (data) {
+      return data;
+    } else {
+      var dynamic = this.dynamicData[key];
+      if (dynamic) {
+        return this.set(key, dynamic());
+      }
+    }
+  }
+}

packages/babel-core/src/transformation/file/index.js

@@ -14,6 +14,7 @@ import includes from "lodash/collection/includes";
 import traverse from "babel-traverse";
 import resolve from "try-resolve";
 import Logger from "./logger";
+import Store from "../../store";
 import Plugin from "../plugin";
 import parse from "../../helpers/parse";
 import * as util from  "../../util";
@@ -29,7 +30,8 @@ var errorVisitor = {
     }
   }
 };
-export default class File {
+
+export default class File extends Store {
   constructor(opts = {}, pipeline) {
     this.pipeline = pipeline;