local augroup = core.misc.augroup("nullls formatting")

return { "nvimtools/none-ls.nvim",
  function()
    local null_ls = require("null-ls")

    null_ls.setup {
      sources = {
        null_ls.builtins.formatting.stylua,
        null_ls.builtins.formatting.black,
        null_ls.builtins.diagnostics.mypy
      },

      on_attach = function(client, bufnr)
        if client.supports_method("textDocument/formatting") then
          vim.api.nvim_clear_autocmds({
            group = augroup,
            buffer = bufnr
          })
          core.misc.auto("BufWritePre", {
            group = augroup,
            buffer = bufnr,
            callback = function()
              vim.lsp.buf.format({ bufnr = bufnr })
            end
          })
        end
      end
    }
  end
}