fix(#4): use path module to add windows support

Author: dukeluo

lib/utils/filename.js

@@ -4,17 +4,19 @@
  */
 'use strict';
 
+const path = require('path');
+
 /**
  * @type {string} filename without path
- * @param {string} path filename concat with path
+ * @param {string} p filename concat with path
  */
-const getFilename = (path) => path.substring(path.lastIndexOf('/') + 1);
+const getFilename = (p) => path.basename(p);
 
 /**
  * @type {string} path of folder
- * @param {string} path filename concat with path
+ * @param {string} p filename concat with path
  */
-const getFolderPath = (path) => path.substring(0, path.lastIndexOf('/') + 1);
+const getFolderPath = (p) => path.join(path.dirname(p), path.sep);
 
 /**
  * @type {string} base name
@@ -29,24 +31,26 @@ const getBasename = (filename, ignoreMiddleExtensions = false) =>
 
 /**
  * @type {string[]} all folders
- * @param {string} path path of folder
+ * @param {string} p path of folder
  */
-const getAllFolders = (path) =>
-  path.split('/').filter((folder) => folder !== '');
+const getAllFolders = (p) =>
+  p.split(path.sep).filter((folder) => folder !== '');
 
 /**
  * @type {string[]} all sub paths
- * @param {string} path path of folder
+ * @param {string} p path of folder
  */
-const getSubPaths = (path) => {
-  const folders = getAllFolders(path);
+const getSubPaths = (p) => {
+  const folders = getAllFolders(p);
   let subPaths = [];
 
   const handler = (array) =>
     array.reduce((acc, folder, index) => {
       if (folder) {
         acc.push(
-          index === 0 ? `${folder}/` : `${acc[acc.length - 1]}${folder}/`
+          index === 0
+            ? path.join(folder, path.sep)
+            : path.join(acc[acc.length - 1], folder, path.sep)
         );
       }
       return acc;
@@ -65,7 +69,7 @@ const getSubPaths = (path) => {
  * @param {string} repositoryRoot path of repository root
  */
 const getPathFromRepositoryRoot = (fullPath, repositoryRoot) =>
-  fullPath.replace(`${repositoryRoot}/`, '');
+  fullPath.replace(path.join(repositoryRoot, path.sep), '');
 
 module.exports = {
   getFolderPath,