are there guides on adding custom diagnostics?

[haolian9]

Hi folks, I recently want to add some custom diagnostics into lua-langserver, but I have no background knowledges on this, can you give some quick/simple guides? like the relevant 3rd libs, files and functions or an example PR which I can learn from.
At now I just learnt how to build it :).

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to be exact, the custom diagnostics I want to add are:

• treat self specially without additional ---@param anonation, and report errors on obj.method, maybe a code action for this can be added
• report errors on if (obj ~= nil), and maybe a code action to convert it to if (obj)

I'm not expecting them can be added to the upstream, I just want to try it out to see if it's useful eventually.

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Several minutes later, i found a great example in this pr.

[sumneko]

1. Resgister your diagnostic name into https://github.com/sumneko/lua-language-server/blob/master/script/proto/diagnostic.lua#L41-L199
2. Create a file with this name into https://github.com/sumneko/lua-language-server/tree/master/script/core/diagnostics

[haolian9]

thank you!