ignore *nogit* and *nosf*; add delete_undefined(obj)

coretool.js

@@ -409,6 +409,17 @@ module.exports = {
     // if (/^\./.test(filename)) filename = `added$filename` // path.extname('.abc') 结果为 ''，所以要添加前缀
     // return path.extname(filename).toLowerCase() // openAi*Ext 是包含 . 的，所以用 path.extname
 
-  }
+  },
+
+  delete_undefined (obj, { depth } = {}) {
+    // delete all undefined properties recursively inside an obect
+    Object.keys(obj).forEach(key => {
+      if (typeof obj[key] === 'undefined') {
+        delete obj[key]
+      } else if (typeof obj[key] === 'object') {
+        this.delete_undefined(obj[key])
+      }
+    })
+  },
 
 }