clear bootstrap files cache before load

src/index.js

@@ -353,6 +353,16 @@ export default class {
         return;
       }
       let files = fs.readdirSync(item);
+
+      //must reload all bootstrap files.
+      //may be register adapter in bootstrap file
+      if (think.config('auto_reload')) {
+        var AutoReload = require('./util/auto_reload.js');
+        //AutoReload.rewriteSysModuleLoad();
+        var instance = new AutoReload(item, () => {});
+        instance.clearFilesCache(files.map(file => item + '/' + file));
+      }
+
       files.forEach(file => {
         let extname = path.extname(file);
         if(extname !== '.js'){

src/util/auto_reload.js

@@ -6,6 +6,9 @@ import path from 'path';
 //can not use import from
 let sys_module = require('module');
 
+//rewriteSysModuleLoad flag
+let _rewriteSysModuleLoad = false;
+
 const NODE_MODULES = `${path.sep}node_modules${path.sep}`;
 
 /**
@@ -139,6 +142,12 @@ export default class extends think.base {
    * @return {} []
    */
   static rewriteSysModuleLoad(){
+
+    if(_rewriteSysModuleLoad){
+      return;
+    }
+    _rewriteSysModuleLoad = true;
+
     let load = sys_module._load;
     
     //rewrite Module._load method