Add webmanifest generator

_config.yml

@@ -63,6 +63,10 @@ favicon:
   safari_pinned_tab: /images/logo.svg
   #android_manifest: /manifest.json
 
+# Generate webmanifest file for PWA. Path can be customized in `favicon.android_manifest`.
+webmanifest:
+  enable: false
+
 # Custom Logo (Warning: Do not support scheme Mist)
 custom_logo: #/uploads/custom-logo.png
 

scripts/generators/index.js

@@ -0,0 +1,5 @@
+/* global hexo */
+
+'use strict';
+
+hexo.extend.generator.register('webmanifest_generator', () => require('./lib/webmanifest')(hexo));

scripts/generators/lib/webmanifest.js

@@ -0,0 +1,12 @@
+'use strict';
+
+module.exports = hexo => {
+  const theme = hexo.theme.config;
+  const { enable, ...webmanifest } = theme.webmanifest;
+  if (enable) {
+    return {
+      path: theme.favicon.android_manifest || 'manifest.json',
+      data: JSON.stringify(webmanifest)
+    };
+  }
+};