From 7326878b4135d8e273ca1ff0a03ae4d38aaf29a0 Mon Sep 17 00:00:00 2001
From: ppoffice <zrp1994@gmail.com>
Date: Thu, 15 Aug 2019 00:05:21 -0400
Subject: [PATCH] fix(*): fix oom by removing meta generator

---
 includes/helpers/override.js | 26 +++++++++++++++++++-------
 includes/helpers/site.js     |  7 ++++++-
 layout/common/head.ejs       |  7 +++++--
 scripts/index.js             |  8 ++++++++
 4 files changed, 38 insertions(+), 10 deletions(-)

diff --git a/includes/helpers/override.js b/includes/helpers/override.js
index f245929..77a2835 100644
--- a/includes/helpers/override.js
+++ b/includes/helpers/override.js
@@ -11,21 +11,30 @@
  */
 const cheerio = require('cheerio');
 
+const __archives = [];
+const __categories = [];
+const __tags = [];
+
 module.exports = function (hexo) {
     hexo.extend.helper.register('_list_archives', function () {
+        if (__archives.length) {
+            return __archives;
+        }
         const $ = cheerio.load(this.list_archives(), { decodeEntities: false });
-        const archives = [];
         $('.archive-list-item').each(function () {
-            archives.push({
+            __archives.push({
                 url: $(this).find('.archive-list-link').attr('href'),
                 name: $(this).find('.archive-list-link').text(),
                 count: $(this).find('.archive-list-count').text()
             });
         });
-        return archives;
+        return __archives;
     });
 
     hexo.extend.helper.register('_list_categories', function () {
+        if (__categories.length) {
+            return __categories;
+        }
         const $ = cheerio.load(this.list_categories({ depth: 2 }), { decodeEntities: false });
         function traverse(root) {
             const categories = [];
@@ -42,20 +51,23 @@ module.exports = function (hexo) {
             });
             return categories;
         }
-        return traverse($('.category-list'));
+        __categories.push(...traverse($('.category-list')));
+        return __categories;
     });
 
     hexo.extend.helper.register('_list_tags', function () {
+        if (__tags.length) {
+            return __tags;
+        }
         const $ = cheerio.load(this.list_tags(), { decodeEntities: false });
-        const tags = [];
         $('.tag-list-item').each(function () {
-            tags.push({
+            __tags.push({
                 url: $(this).find('.tag-list-link').attr('href'),
                 name: $(this).find('.tag-list-link').text(),
                 count: $(this).find('.tag-list-count').text()
             });
         });
-        return tags;
+        return __tags;
     });
 
     /**
diff --git a/includes/helpers/site.js b/includes/helpers/site.js
index f9bd525..c29c187 100644
--- a/includes/helpers/site.js
+++ b/includes/helpers/site.js
@@ -11,6 +11,7 @@
 *     <%- word_count(content) %>
 *     <%- md5(data) %>
 *     <%- meta() %>
+*     <%- hexo_version() %>
  */
 const URL = require('url').URL;
 const moment = require('moment');
@@ -62,7 +63,7 @@ module.exports = function (hexo) {
     });
 
     hexo.extend.helper.register('md5', function (data) {
-        return crypto.createHash('md5').update(data).digest("hex")
+        return crypto.createHash('md5').update(data).digest("hex");
     });
 
     hexo.extend.helper.register('meta', function () {
@@ -98,4 +99,8 @@ module.exports = function (hexo) {
         });
         return metaDOMArray.join('\n');
     });
+
+    hexo.extend.helper.register('hexo_version', function (data) {
+        return hexo.version;
+    });
 }
\ No newline at end of file
diff --git a/layout/common/head.ejs b/layout/common/head.ejs
index bdbe1ab..3bb0ed5 100644
--- a/layout/common/head.ejs
+++ b/layout/common/head.ejs
@@ -1,7 +1,10 @@
-<meta charset="utf-8">
-<title><%= page_title() %></title>
+<meta charset="utf-8" />
+<% if (get_config('meta_generator', true)) { %>
+<meta name="generator" content="Hexo <%= hexo_version() %>" />
+<% } %>
 <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1" />
 <%- meta() %>
+<title><%= page_title() %></title>
 
 <% if (has_config('open_graph')) { %>
     <%- open_graph({
diff --git a/scripts/index.js b/scripts/index.js
index 1fd9e98..43a84f2 100644
--- a/scripts/index.js
+++ b/scripts/index.js
@@ -13,6 +13,14 @@ require('../includes/helpers/override')(hexo);
 require('../includes/helpers/page')(hexo);
 require('../includes/helpers/site')(hexo);
 
+// Fix large blog rendering OOM
+const postHtmlFilter = hexo.extend.filter.list()['after_render:html'];
+for (let filter of postHtmlFilter) {
+    if (filter.name === 'hexoMetaGeneratorInject') {
+        hexo.extend.filter.unregister('after_render:html', filter);
+    }
+}
+
 // Debug helper
 hexo.extend.helper.register('console', function () {
     console.log(arguments)