How to use yaml formatter with Neovim builtin LSP client?

The codebase contains a yamlFormatter although the server capabilities says otherwise:

        documentFormattingProvider: false,

The formatter runs perfectly well in VSCode. I installed the server using npm and running the server with the default settings.

[dhruvmanila]

I think you should directly use prettier for YAML files as the language server uses that internally.

https://github.com/redhat-developer/yaml-language-server/blob/f03324a3a81c1a32b153b61dea685308865b5dac/src/languageservice/services/yamlFormatter.ts#L47

But, if you want to use the language server, then I suggest to guard the line so that it only affects the YAML language server:

local on_attach = function(client, buffer)
  if client.name == "yamlls" then
    client.resolved_capabilities.document_formatting = true
  end
end

[meatballs]

Never mind. I got it working myself by adding a line to my on_attach function:

local on_attach = function(client, bufnr)
  client.resolved_capabilities.document_formatting = true