Apparently highlightjs, due to lack of core maintainers, is asking for new language support to be added via separate repositories. (See Policy: Discuss extras repository for additional languages · Issue #2149 · highlightjs/highlight.js · GitHub).
One such separate repo is GitHub - highlightjs/highlightjs-rpm-specfile · GitHub, for highlighting the RPM specfile syntax. Could you please add that to Discourse? It would be hugely helpful for Fedora!
We’ve been adding non default languages as Customization > Theme component, even added a dedicated API hook for this.
Okay, cool — is there an example I can crib from?
I packaged one quickly for you, can you try it out?
Thank you!!! And, yep — right after lunch. 
Yes, seems to work!
From what I can see, it seems to auto-detect and work. If I want
```rpm-specfile
to work, I seem to need to put rpm-specfile in the “highlighted languages” site setting. Is that correct?
Also, if I put rpm there, that also works. Is this expected, or is it one of those things where I want to happen is happening for the wrong reason?
Hmm, but it doesn’t seem to be complete… I’m getting bold for sections like %description and %prep, purple for macros like %{?dist}, and # comments get grey italics. So far so good.
But looking at discourse-highlightjs-rpm/javascripts/discourse/lib/rpm-highlightjs.js at main · discourse/discourse-highlightjs-rpm · GitHub, I would expect Name:, Release: etc, to be highlighted in some way too, as well as %if and %endif — but those aren’t.
Are those comments directed to the Discourse integration or to the quality of the highlighter itself?
I only copy and pasted the definition from the link you provided in the OP into a Discourse-compatible Customization > Theme component, so the capabilities of it are still the original ones.
I’m seeing those things in the code in your[1] repo, so I expect that they’d work, but they do not appear to be highlighted in DIscourse. I don’t know if that’s a problem with the highlighter module, the Discourse implementation of that, or the theme component.
this is not meant to be a blame statement, like “it’s your repo”… just to be clear ↩︎
(For the record have bookmarked this to check what should work when I get a chance.)
@falco — I had some time to look at this. Using Firefox’s built-in inspector, I can see that it properly add spans with classes hljs-type, hljs-keyword, etc. But if I look over on the styles side, I see a .hljs but not .hljs-type — only .hljs-keyword and .hljs-comment (the ones that work) seem to be there.
Oh, and .hljs-string also works. But I see some of the others in css … any idea what’s going on?
FWIW, this still does not work. (Sad face emoji)
Looks like core was missing styling for the .hljs-type class. I’ve cleaned things up in this PR.
Exact colours will depend on your theme, but here’s an example RPM file:
Yep, works now. Thank you!
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