TOML syntax highlighting

[kaushalmodi]

Can we have syntax highlighting for TOML? There are many TOML parser implementations if they can serve as the proof of popularity. The aim is to have links like https://ptpb.pw/cg9R (small TOML snippet) be syntax highlighted using https://ptpb.pw/cg9R/toml.

For example, it looks like this in Emacs:

[buhman]

Related: https://bitbucket.org/birkenfeld/pygments-main/issues/1150/new-lexer-request-toml-rust

[buhman]

This is not as trivial as implied.

TOML parser implementations

Actually these are TOML codecs, which aren't directly useful if they don't provide a standalone-usable (much less documented) parser/lexer interface.

The tokens emitted by that lexer also would need to use pygments' token model (or be translated).

[buhman]

This looks directly usable, if valid to begin with:

https://github.com/liluo/pygments-github-lexers/blob/master/pygments_github_lexers/github.py

[buhman]

I integrated pygments_github_lexers for toml and puppet in custom-lexers. Unfortunately, github crashes while attempting to generate a diff for that, so I'm unable to create a pull request (you can look at b8755db though).

More importantly, that lexer is completely garbage, and looks awful:

Compare that with how the cfg lexer parses this:

[buhman]

As a consquence, I'm going to close this as:

• wontfix
• patcheswelcome
• upstreambug

As all of these are applicable.

[buhman]

On the other hand, if you really want the first version as-is, I'm happy to merge terrible lexers.

[kaushalmodi]

I agree that that lexer is terrible, but at least it is not highlighting things incorrectly. The cfg (ini?) lexer works for the simple example. But https://ptpb.pw/cg9R/cfg looks really bad:

Does that incomplete toml lexer look that bad?