fix(post): skip before_post_render and after_post_render on non-posts (…

…#5118)

lib/hexo/post.js

@@ -376,6 +376,27 @@ class Post {
       return Promise.reject(new Error('No input file or string!')).asCallback(callback);
     }
 
+    // Files like js and css are also processed by this function, but they do not require preprocessing like markdown
+    // data.source does not exist when tag plugins call the markdown renderer
+    const isPost = !data.source || ['html', 'htm'].includes(ctx.render.getOutput(data.source));
+
+    if (!isPost) {
+      return promise.then(content => {
+        data.content = content;
+        ctx.log.debug('Rendering file: %s', magenta(source));
+
+        return ctx.render.render({
+          text: data.content,
+          path: source,
+          engine: data.engine,
+          toString: true
+        });
+      }).then(content => {
+        data.content = content;
+        return data;
+      }).asCallback(callback);
+    }
+
     // disable Nunjucks when the renderer specify that.
     let disableNunjucks = ext && ctx.render.renderer.get(ext) && !!ctx.render.renderer.get(ext).disableNunjucks;
 

test/scripts/hexo/post.js

@@ -685,6 +685,16 @@ describe('Post', () => {
     await unlink(path);
   });
 
+  it('render() - skip js', async () => {
+    const content = 'let a = "{{ 1 + 1 }}"';
+
+    const data = await post.render(null, {
+      content,
+      source: 'render_test.js'
+    });
+    data.content.trim().should.eql(content);
+  });
+
   it('render() - toString', async () => {
     const content = 'foo: 1';