Console reminder if new version released

_config.yml

@@ -9,6 +9,9 @@
 # Useful if you want to comment some options from NexT `_config.yml` by `next.yml` without editing default config.
 override: false
 
+# Console reminder if new version released.
+reminder: true
+
 # Allow to cache content generation. Introduced in NexT v6.0.0.
 cache:
   enable: true

scripts/merge-configs.js

@@ -2,7 +2,7 @@
 
 'use strict';
 
-var merge = require('lodash/merge');
+const merge = require('lodash/merge');
 
 hexo.on('generateBefore', function() {
   if (hexo.locals.get) {
@@ -47,3 +47,42 @@ hexo.on('generateBefore', function() {
   require('./injects')(hexo);
 
 });
+
+hexo.on('generateAfter', function() {
+  if (!hexo.theme.config.reminder) return;
+  const https = require('https');
+  const path = require('path');
+  const env = require(path.normalize('../package.json'));
+  https.get('https://api.github.com/repos/theme-next/hexo-theme-next/releases/latest', {
+    headers: {
+      'User-Agent': 'Theme NexT Client'
+    }
+  }, res => {
+    var result = '';
+    res.on('data', data => {
+      result += data;
+    });
+    res.on('end', () => {
+      try {
+        var latest = JSON.parse(result).tag_name.replace('v', '').split('.');
+        var current = env.version.split('.');
+        var isOutdated = false;
+        for (var i = 0; i < Math.max(latest.length, current.length); i++) {
+          if (!current[i] || latest[i] > current[i]) {
+            isOutdated = true;
+            break;
+          }
+        }
+        if (isOutdated) {
+          hexo.log.warn(`Your theme NexT is outdated. Current version: v${current.join('.')}, latest version: v${latest.join('.')}`);
+          hexo.log.warn('Visit https://github.com/theme-next/hexo-theme-next/releases for more information.');
+        } else {
+          hexo.log.info('Congratulations! Your are using the latest version of theme NexT.');
+        }
+      } catch (e) {
+        hexo.log.error('Failed to detect version info. Error message:');
+        hexo.log.error(e);
+      }
+    });
+  });
+});