feat(config): make meta global configurable

includes/helpers/page.js

@@ -5,25 +5,11 @@
 *     <%- is_categories(page) %>
 *     <%- is_tags(page) %>
 *     <%- page_title(page) %>
-*     <%- meta(post) %>
 *     <%- has_thumbnail(post) %>
 *     <%- get_thumbnail(post) %>
 *     <%- get_og_image(post) %>
 */
 module.exports = function (hexo) {
-    function trim(str) {
-        return str.trim().replace(/^"(.*)"$/, '$1').replace(/^'(.*)'$/, '$1');
-    }
-
-    function split(str, sep) {
-        var result = [];
-        var matched = null;
-        while (matched = sep.exec(str)) {
-            result.push(matched[0]);
-        }
-        return result;
-    }
-
     hexo.extend.helper.register('is_categories', function (page = null) {
         return (page === null ? this.page : page).__categories;
     });
@@ -60,27 +46,6 @@ module.exports = function (hexo) {
         return [title, siteTitle].filter(str => typeof (str) !== 'undefined' && str.trim() !== '').join(' - ');
     });
 
-    hexo.extend.helper.register('meta', function (post) {
-        var metas = post.meta || [];
-        var output = '';
-        var metaDOMArray = metas.map(function (meta) {
-            var entities = split(meta, /(?:[^\\;]+|\\.)+/g);
-            var entityArray = entities.map(function (entity) {
-                var keyValue = split(entity, /(?:[^\\=]+|\\.)+/g);
-                if (keyValue.length < 2) {
-                    return null;
-                }
-                var key = trim(keyValue[0]);
-                var value = trim(keyValue[1]);
-                return key + '="' + value + '"';
-            }).filter(function (entity) {
-                return entity;
-            });
-            return '<meta ' + entityArray.join(' ') + ' />';
-        });
-        return metaDOMArray.join('\n');
-    });
-
     hexo.extend.helper.register('has_thumbnail', function (post) {
         const getConfig = hexo.extend.helper.get('get_config').bind(this);
         const allowThumbnail = getConfig('article.thumbnail', true);
@@ -110,7 +75,7 @@ module.exports = function (hexo) {
 
         let og_image
 
-        if(hasOGImage)
+        if (hasOGImage)
             og_image = post.og_image
         else if (hasThumbnail)
             og_image = getThumbnail(post);

includes/helpers/site.js

@@ -10,6 +10,7 @@
 *     <%- duration() %>
 *     <%- word_count(content) %>
 *     <%- md5(data) %>
+*     <%- meta() %>
  */
 const URL = require('url').URL;
 const moment = require('moment');
@@ -63,4 +64,38 @@ module.exports = function (hexo) {
     hexo.extend.helper.register('md5', function (data) {
         return crypto.createHash('md5').update(data).digest("hex")
     });
+
+    hexo.extend.helper.register('meta', function () {
+        function trim(str) {
+            return str.trim().replace(/^"(.*)"$/, '$1').replace(/^'(.*)'$/, '$1');
+        }
+    
+        function split(str, sep) {
+            const result = [];
+            let matched = null;
+            while (matched = sep.exec(str)) {
+                result.push(matched[0]);
+            }
+            return result;
+        }
+
+        const getConfig = hexo.extend.helper.get('get_config').bind(this);
+        const metas = getConfig('meta', []);
+        const metaDOMArray = metas.map(function (meta) {
+            const entities = split(meta, /(?:[^\\;]+|\\.)+/g);
+            const entityArray = entities.map(function (entity) {
+                const keyValue = split(entity, /(?:[^\\=]+|\\.)+/g);
+                if (keyValue.length < 2) {
+                    return null;
+                }
+                const key = trim(keyValue[0]);
+                const value = trim(keyValue[1]);
+                return key + '="' + value + '"';
+            }).filter(function (entity) {
+                return entity;
+            });
+            return '<meta ' + entityArray.join(' ') + ' />';
+        });
+        return metaDOMArray.join('\n');
+    });
 }

includes/specs/meta.spec.js

@@ -6,6 +6,15 @@ module.exports = {
         [doc]: 'Path or URL to the website\'s icon',
         [defaultValue]: '/images/favicon.svg',
     },
+    meta: {
+        [type]: 'array',
+        [doc]: 'Additional HTML meta tags in an array.',
+        [defaultValue]: null,
+        '*': {
+            [type]: 'string',
+            [doc]: 'Meta tag specified in <attribute>=<value> style.\nE.g., name=theme-color;content=#123456 => <meta name="theme-color" content="#123456">'
+        }
+    },
     rss: {
         [type]: 'string',
         [doc]: 'Path or URL to RSS atom.xml',

layout/common/head.ejs

@@ -1,7 +1,7 @@
 <meta charset="utf-8">
 <title><%= page_title() %></title>
 <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1" />
-<%- meta(page) %>
+<%- meta() %>
 
 <% if (has_config('open_graph')) { %>
     <%- open_graph({