Twig syntax highlighting broken

[ericmorand]

Hi,

First, sorry, I don't know anything about Ruby so I cant' give an example that is not a Jekyll template. Jekyll team confirmed that this is a Rouge issue (jekyll/jekyll#6844).

So here it is, hoping that you'll be able to understand and reproduce the bug.

Rouge syntax highlighting is broken with Twig. Consider the following Jekyll code blocks containing a perfectly valid Twig syntax:

{% highlight twig %}
{% raw %}
{% set a = 'b' %}
{% endraw %}
{% endhighlight %}

    ```twig
    {% raw %}
    {% set a = 'b' %}
    {% endraw %}
    ```

Both outputs the following HTML:

<code class="language-twig" data-lang="twig">
    <span class="cp">{%</span> 
    <span class="k">set</span> 
    <span class="nv">a</span> 
    <span class="err">=</span>
    <span class="s1">'b'</span> 
    <span class="cp">%}</span>
</code>

Notice the err class attributed to the equal sign.

Steps to reproduce

• Follow the official quick-start guide: https://jekyllrb.com/docs/quickstart/
• Replace the content of the post created by the installation with this:

---
layout: post
title:  "Welcome to Jekyll!"
categories: jekyll update
---

{% highlight twig %}
{% raw %}
{% set a = 'b' %}
{% endraw %}
{% endhighlight %}

[pathawks]

It looks like the Twig lexer is a subclass of the Jinja lexer, which does not include an assignment operator:

https://github.com/jneen/rouge/blob/966efcb7a1cfa1d1851f8f44d292426de2b5d006/lib/rouge/lexers/jinja.rb#L82-L87

For reference, the statement seems to render correctly on GitHub:

{% set a = 'b' %}

GitHub uses the Twig TextMate bundle for highlighting Twig snippets.

[XaBerr]

Same problem here, I do not know if this can help but I'm using jekyll on github to render twig code and give me the same problem.

code

rendering

[stale]

This contribution has been automatically marked as stale because it has not had any activity for more than a year. It will be closed if no additional activity occurs within the next 14 days.

[pyrmont]

Support for raw has been added via #1003. Please let us know if there are any problems with it!