nvim lsp -> qf

lsp.lua

local diagnostics_quickfix = function(_, _, result, _)
  if not result then return end
  local uri = result.uri
  local bufnr = vim.uri_to_bufnr(uri)
  local diagnostics = result.diagnostics
  if not bufnr then
    err_message("LSP.publishDiagnostics: Couldn't find buffer for ", uri)
    return
  end
  for _, v in ipairs(diagnostics) do
    v.uri = v.uri or result.uri
  end
  local locations = vim.lsp.util.locations_to_items(diagnostics)
  vim.lsp.util.set_qflist(locations)
  -- when errors are fixed, close qflist automatically
  local qf = vim.fn.getqflist({["size"] = 0})
  if qf["size"] == 0 then
    vim.api.nvim_command("cclose")
  end
  vim.api.nvim_command("autocmd! BufWritePost <buffer> doautocmd QuickFixCmdPost")
end

vim.lsp.callbacks["textDocument/publishDiagnostics"] = diagnostics_quickfix