Don't close nvim if current buffer is deleted

[taybart]

Fixes #703

Let me know if there is any refactor/optimization needed

Explanation by line:

local function clear_buffer(absolute_path)
  local bufs = vim.fn.getbufinfo({bufloaded = 1, buflisted = 1}) -- get loaded and listed bufs
  for _, buf in pairs(bufs) do
    if buf.name == absolute_path then -- this is the buffer we want
      if buf.hidden == 0 and #bufs > 1 then -- buffer visible and not alone
        local winnr = api.nvim_get_current_win() -- store old winnr
        api.nvim_set_current_win(buf.windows[1]) -- switch to win
        vim.cmd(':bn') -- switch to next buffer
        api.nvim_set_current_win(winnr) -- go back to original
      end
      vim.api.nvim_buf_delete(buf.bufnr, {}) -- delete the buffer in question
      return -- done
    end
  end
end

[kyazdani42]

i'd have used more vim.api functions but it's ok like this. thanks for the contribution !

[taybart]

@kyazdani42 I can use more vim.api functions, I thought vim.fn.getbufinfo was a pretty good one to use for this. I also see that the last api call has vim which it should probably not. Let me know if you want a refactor

[kyazdani42]

it works, let keep it that way and don't waste your time for such a small detail :)