YAML folds not working

[windowsrefund]

Neovim version (nvim -v | head -n1)

0.7.2

Operating system/version

Who cares

How to reproduce the issue

Open any YAML file

Expected behavior

Expect folds to work

Actual behavior

Tried every configuration example I can find on this site including #21 but nothing works.

[kevinhwang91]

-- Option 2: nvim lsp as LSP client
-- Tell the server the capability of foldingRange,
-- Neovim hasn't added foldingRange to default capabilities, users must add it manually
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities.textDocument.foldingRange = {
    dynamicRegistration = false,
    lineFoldingOnly = true
}

[windowsrefund]

That does not work. Have you opened a yaml file yourself with that setup (with yamlls installed and attached to the buffer)?

[kevinhwang91]

Work for me. Debug yourself to make sure capabilities.textDocument contains foldingRange.

[msva]

Acttually, I had exactly same error with exactly same yaml langserver.

Problem was exactly in the fact that I missed to pass capabilities to exactly that langserver.

FYI, @windowsrefund

[costa-simulatedreality]

I have added this lines of code to include the capabilities in the available language servers (this file is in my .config/lvim/after/plugin/nvim-ufo.lua)

vim.o.foldcolumn = '1' -- '0' is not bad
vim.o.foldlevel = 99 -- Using ufo provider need a large value, feel free to decrease the value
vim.o.foldlevelstart = 99
vim.o.foldenable = true
vim.o.fillchars = [[eob: ,fold: ,foldopen:,foldsep: ,foldclose:]]

-- Tell the server the capability of foldingRange,
-- Neovim hasn't added foldingRange to default capabilities, users must add it manually
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities.textDocument.foldingRange = {
    dynamicRegistration = false,
    lineFoldingOnly = true
}
local language_servers = require("lspconfig").util.available_servers() -- or list servers manually like {'gopls', 'clangd'}
for _, ls in ipairs(language_servers) do
    require('lspconfig')[ls].setup({
        capabilities = capabilities
        -- you can add other fields for setting up lsp server in this table
    })
end

local builtin = require("statuscol.builtin")
require("statuscol").setup({
  relculright = true,
  segments = {
    { text = { builtin.foldfunc }, click = "v:lua.ScFa" },
    { text = { "%s" }, click = "v:lua.ScSa" },
    { text = { builtin.lnumfunc, " " }, click = "v:lua.ScLa" },
  },
})

require('ufo').setup()

But for some reason I keep getting this "Request textDocument/foldingRange failed with message: Cannot read properties of undefined (reading 'lineFoldingOnly')" error message every time I open a yaml file.
When I do check if the ymlls server is available, it in fact is!

How can I check if the capability has been added to my ls on runtime (i.e. after lunarvim has gone through the whole configuration setup) ?

[kapral18]

If you added the capabilities but still experience the issue, most like you have another plugin that overwrites your lsp config like yaml-chamption https://github.com/someone-stole-my-name/yaml-companion.nvim/blob/4de1e1546abc461f62dee02fcac6a02debd6eb9e/lua/yaml-companion/config.lua#L15.

Issue here someone-stole-my-name/yaml-companion.nvim#37.

For yaml-companion one of the fixes is to additionally pass it again into the plugin

like

  {
    "someone-stole-my-name/yaml-companion.nvim",
    ft = { "yaml" },
    dependencies = {
      { "neovim/nvim-lspconfig" },
      { "nvim-lua/plenary.nvim" },
      { "nvim-telescope/telescope.nvim" },
    },
    opts = {
      lspconfig = {
        capabilities = {
          textDocument = {
            foldingRange = {
              dynamicRegistration = false,
              lineFoldingOnly = true,
            },
          },
        },
      },
    },
}