fix(文章删除): 修复没有删除本地文件的问题

lib/Downloader.js

@@ -9,6 +9,7 @@ const filenamify = require('filenamify');
 const YuqueClient = require('./yuque');
 const { isPost } = require('../util');
 const out = require('./out');
+const rimraf = require('rimraf');
 
 const cwd = process.cwd();
 
@@ -81,7 +82,7 @@ class Downloader {
    * @return {Promise} queue
    */
   async fetchArticles() {
-    const { client, config } = this;
+    const { client, config, postBasicPath } = this;
     const articles = await client.getArticles();
     if (!Array.isArray(articles.data)) {
       throw new Error(
@@ -95,9 +96,18 @@ class Downloader {
       )
       .filter(article => (config.onlyPublic ? !!article.public : true))
       .map(article => lodash.pick(article, PICK_PROPERTY));
-
-    this._cachedArticles = this._cachedArticles.filter(cache => realArticles.findIndex((item)=>item.slug === cache.slug) != -1);
-
+
+    const deletedArticles = this._cachedArticles.filter(cache => realArticles.findIndex(item => item.slug === cache.slug) === -1);
+
+    // 删除本地已存在的但是语雀上面被删除的文章
+    for (const article of deletedArticles) {
+      const fileName = filenamify(article[config.mdNameFormat]);
+      const postPath = path.join(postBasicPath, `${fileName}.md`);
+      rimraf.sync(postPath);
+    }
+
+    this._cachedArticles = this._cachedArticles.filter(cache => realArticles.findIndex(item => item.slug === cache.slug) !== -1);
+
     const queue = new Queue({ concurrency: config.concurrency });
 
     let article;
@@ -108,7 +118,7 @@ class Downloader {
     const findIndexFn = function(item) {
       return item.slug === article.slug;
     };
-    
+
     const { _cachedArticles } = this;
 
     for (let i = 0; i < realArticles.length; i++) {