feat: integrate with feed (#58)

Author: billyyyyy3320

Diff for: docs/config/README.md

@@ -249,4 +249,18 @@ It will be enabled when `endpoint` is provided. e.g.
 ```
 [vuepress-plugin-mailchimp](https://vuepress-plugin-mailchimp.billyyyyy3320.com/) is how we implement the feature. This config will be pass directly to it, so please head [vuepress-plugin-mailchimp](https://vuepress-plugin-mailchimp.billyyyyy3320.com/#config) for more details.  
 
+## feed
 
+- Type: `object`
+- Default: `{}`
+- Required: `false`
+
+It will be enabled when `canonical_base` is provided. e.g.
+
+```js
+{
+  canonical_base: 'https://yoursite'
+}
+```
+
+All the generated files will be placed under your output directory. If you wish to make further configuration, please check out [vuepress-plugin-feed](https://github.com/webmasterish/vuepress-plugin-feed).

Diff for: docs/guide/getting-started.md

@@ -460,6 +460,29 @@ In your theme, You'll probably offer users options whether to enable or not. You
 
 Please head [UI-customization](https://vuepress-plugin-mailchimp.billyyyyy3320.com/#ui-customization) if you don't like the default UI.
 
+## Feed
+
+Feed is another approach to allow your users to get your latest content. RSS, Atom, and even JSON feeds are the right tools for the job. Let's see an example:
+
+```JavaScript
+// .vuepress/config.js
+module.exports = {
+  plugins: [
+    [
+      '@vuepress/blog',
+      {
+        feed: {
+         canonical_base: 'http://yoursite',
+        },
+      },
+    ],
+  ],
+}
+```
+
+After building, you'll be able to find them (`rss.xml`, `feed.atom`, `feed.json`) in you output directory (`dist`).
+
+
 ## Examples
 
 There're some [examples](https://github.com/vuepressjs/vuepress-plugin-blog/tree/master/examples) under this project help us test this plugin. They're also simplest examples for you after reading all the concept above. 

Diff for: examples/sitemap/.vuepress/config.js renamed to examples/sitemap+feed/.vuepress/config.js

@@ -26,6 +26,9 @@ module.exports = {
       sitemap: {
         hostname: 'https://yourdomain'
       },
+      feed:{
+        canonical_base: 'http://localhost:8080',
+      }
     }],
   ],
 }

Diff for: examples/sitemap/.vuepress/theme/layouts/FrontmatterKey.vue renamed to examples/sitemap+feed/.vuepress/theme/layouts/FrontmatterKey.vue

@@ -56,6 +56,7 @@
     "dayjs": "^1.8.19",
     "vuejs-paginate": "^2.1.0",
     "vuepress-plugin-disqus": "^0.2.0",
+    "vuepress-plugin-feed": "^0.1.8",
     "vuepress-plugin-mailchimp": "^1.4.1",
     "vuepress-plugin-sitemap": "^2.3.1"
   },

Diff for: examples/sitemap/.vuepress/theme/layouts/GlobalLayout.vue renamed to examples/sitemap+feed/.vuepress/theme/layouts/GlobalLayout.vue

@@ -233,11 +233,23 @@ export function handleOptions(
     }
   }
 
-  if (!!(options.newsletter && options.newsletter.endpoint)) {
+  if (options.newsletter && options.newsletter.endpoint) {
     plugins.push(['vuepress-plugin-mailchimp', options.newsletter]);
     services.email.enabled = true;
   }
 
+  if (options.feed && options.feed.canonical_base) {
+    /* eslint-disable @typescript-eslint/camelcase */
+    const defaultFeedOptions = {
+      posts_directories: [] as string[],
+    };
+    directories.forEach(dir => {
+      defaultFeedOptions.posts_directories.push(dir.dirname);
+    });
+    const feedOptions = Object.assign({}, defaultFeedOptions, options.feed);
+    plugins.push(['vuepress-plugin-feed', feedOptions]);
+  }
+
   const processedData = {
     pageEnhancers,
     frontmatterClassificationPages,

Diff for: examples/sitemap/.vuepress/theme/layouts/Layout.vue renamed to examples/sitemap+feed/.vuepress/theme/layouts/Layout.vue

@@ -158,6 +158,7 @@ export interface BlogPluginOptions {
   globalPagination: PaginationConfig;
   //TODO: define types
   sitemap: any;
+  feed: any;
   comment: Comment;
   newsletter: Newsletter;
 }

Diff for: examples/sitemap/.vuepress/theme/layouts/Post.vue renamed to examples/sitemap+feed/.vuepress/theme/layouts/Post.vue

@@ -3987,6 +3987,14 @@ faye-websocket@~0.11.1:
   dependencies:
     websocket-driver ">=0.5.1"
 
+[email protected]:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/feed/-/feed-2.0.4.tgz#14cd71b3bae1e965b81f7e0c5927e8941de996f8"
+  integrity sha512-sWatfulDP6d18qVaWcu34qmq9ml6UeN6nHSBJpNZ2muBqxjPAdT375whPYAHP+gqLfyabtYU5qf2Dv4nqtlp0w==
+  dependencies:
+    luxon "^1.3.3"
+    xml "^1.0.1"
+
 figgy-pudding@^3.5.1:
   version "3.5.1"
   resolved "https://registry.yarnpkg.com/figgy-pudding/-/figgy-pudding-3.5.1.tgz#862470112901c727a0e495a80744bd5baa1d6790"
@@ -5879,6 +5887,16 @@ lodash.debounce@^4.0.8:
   resolved "https://registry.yarnpkg.com/lodash.debounce/-/lodash.debounce-4.0.8.tgz#82d79bff30a67c4005ffd5e2515300ad9ca4d7af"
   integrity sha1-gteb/zCmfEAF/9XiUVMArZyk168=
 
+[email protected]:
+  version "4.6.1"
+  resolved "https://registry.yarnpkg.com/lodash.defaultsdeep/-/lodash.defaultsdeep-4.6.1.tgz#512e9bd721d272d94e3d3a63653fa17516741ca6"
+  integrity sha512-3j8wdDzYuWO3lM3Reg03MuQR957t287Rpcxp1njpEa8oDrikb+FwGdW3n+FELh/A6qib6yPit0j/pv9G/yeAqA==
+
+[email protected]:
+  version "4.4.0"
+  resolved "https://registry.yarnpkg.com/lodash.isempty/-/lodash.isempty-4.4.0.tgz#6f86cbedd8be4ec987be9aaf33c9684db1b31e7e"
+  integrity sha1-b4bL7di+TsmHvpqvM8loTbGzHn4=
+
 lodash.ismatch@^4.4.0:
   version "4.4.0"
   resolved "https://registry.yarnpkg.com/lodash.ismatch/-/lodash.ismatch-4.4.0.tgz#756cb5150ca3ba6f11085a78849645f188f85f37"
@@ -5919,6 +5937,16 @@ lodash.templatesettings@^4.0.0:
   dependencies:
     lodash._reinterpolate "^3.0.0"
 
+lodash.trimend@^4.5.1:
+  version "4.5.1"
+  resolved "https://registry.yarnpkg.com/lodash.trimend/-/lodash.trimend-4.5.1.tgz#12804437286b98cad8996b79414e11300114082f"
+  integrity sha1-EoBENyhrmMrYmWt5QU4RMAEUCC8=
+
+lodash.trimstart@^4.5.1:
+  version "4.5.1"
+  resolved "https://registry.yarnpkg.com/lodash.trimstart/-/lodash.trimstart-4.5.1.tgz#8ff4dec532d82486af59573c39445914e944a7f1"
+  integrity sha1-j/TexTLYJIavWVc8OURZFOlEp/E=
+
 [email protected]:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/lodash.unescape/-/lodash.unescape-4.0.1.tgz#bf2249886ce514cda112fae9218cdc065211fc9c"
@@ -6002,6 +6030,11 @@ lru-cache@^5.1.1:
   dependencies:
     yallist "^3.0.2"
 
+luxon@^1.3.3:
+  version "1.21.3"
+  resolved "https://registry.yarnpkg.com/luxon/-/luxon-1.21.3.tgz#f1d5c2a7e855d039836cf4954f883ecac8fc4727"
+  integrity sha512-lLRwNcNnkZLuv13A1FUuZRZmTWF7ro2ricYvb0L9cvBYHPvZhQdKwrYnZzi103D2XKmlVmxWpdn2wfIiOt2YEw==
+
 make-dir@^1.0.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/make-dir/-/make-dir-1.3.0.tgz#79c1033b80515bd6d24ec9933e860ca75ee27f0c"
@@ -8096,6 +8129,11 @@ [email protected]:
   resolved "https://registry.yarnpkg.com/relateurl/-/relateurl-0.2.7.tgz#54dbf377e51440aca90a4cd274600d3ff2d888a9"
   integrity sha1-VNvzd+UUQKypCkzSdGANP/LYiKk=
 
+[email protected]:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/remove-markdown/-/remove-markdown-0.3.0.tgz#5e4b667493a93579728f3d52ecc1db9ca505dc98"
+  integrity sha1-XktmdJOpNXlyjz1S7MHbnKUF3Jg=
+
 remove-trailing-separator@^1.0.1:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/remove-trailing-separator/-/remove-trailing-separator-1.1.0.tgz#c24bce2a283adad5bc3f58e0d48249b92379d8ef"
@@ -9028,6 +9066,11 @@ strip-json-comments@~2.0.1:
   resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-2.0.1.tgz#3c531942e908c2697c0ec344858c286c7ca0a60a"
   integrity sha1-PFMZQukIwml8DsNEhYwobHygpgo=
 
+[email protected]:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/striptags/-/striptags-3.1.1.tgz#c8c3e7fdd6fb4bb3a32a3b752e5b5e3e38093ebd"
+  integrity sha1-yMPn/db7S7OjKjt1LltePjgJPr0=
+
 stylehacks@^4.0.0:
   version "4.0.3"
   resolved "https://registry.yarnpkg.com/stylehacks/-/stylehacks-4.0.3.tgz#6718fcaf4d1e07d8a1318690881e8d96726a71d5"
@@ -9857,6 +9900,19 @@ vuepress-plugin-disqus@^0.2.0:
   dependencies:
     vue-disqus "^3.0.5"
 
+vuepress-plugin-feed@^0.1.8:
+  version "0.1.8"
+  resolved "https://registry.yarnpkg.com/vuepress-plugin-feed/-/vuepress-plugin-feed-0.1.8.tgz#134c69f98c71994d17f926e3c7c2ad006f573195"
+  integrity sha512-ZDJ2KTAxdeXiykBKOWTht4qleImaY9OEbm9cqQdc/54j0P45ax1PhJjsq5aTs3GcIE1nbZKLCd4fSzhRY6bijg==
+  dependencies:
+    feed "2.0.4"
+    lodash.defaultsdeep "4.6.1"
+    lodash.isempty "4.4.0"
+    lodash.trimend "^4.5.1"
+    lodash.trimstart "^4.5.1"
+    remove-markdown "0.3.0"
+    striptags "3.1.1"
+
 vuepress-plugin-mailchimp@^1.4.1:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/vuepress-plugin-mailchimp/-/vuepress-plugin-mailchimp-1.4.1.tgz#458c4a65f633b0690acd650400e3af6769c947f2"
@@ -10171,6 +10227,11 @@ xdg-basedir@^3.0.0:
   resolved "https://registry.yarnpkg.com/xdg-basedir/-/xdg-basedir-3.0.0.tgz#496b2cc109eca8dbacfe2dc72b603c17c5870ad4"
   integrity sha1-SWsswQnsqNus/i3HK2A8F8WHCtQ=
 
+xml@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/xml/-/xml-1.0.1.tgz#78ba72020029c5bc87b8a81a3cfcd74b4a2fc1e5"
+  integrity sha1-eLpyAgApxbyHuKgaPPzXS0ovweU=
+
 xmlbuilder@^13.0.0:
   version "13.0.2"
   resolved "https://registry.yarnpkg.com/xmlbuilder/-/xmlbuilder-13.0.2.tgz#02ae33614b6a047d1c32b5389c1fdacb2bce47a7"