Way to handle duplicate filenames in bufferline?

[olimorris]

Wondered if anyone has a neat way of handling buffers which have duplicate names in the bufferline? If I have two init.lua buffers I like to display them as plugins/init.lua and nvim/init.lua instead.

I have borrowed this from feline.nvim so far:

---Get the names of all current listed buffers
---@return table
local function get_current_filenames()
  local listed_buffers = vim.tbl_filter(
    function(bufnr) return vim.bo[bufnr].buflisted and vim.api.nvim_buf_is_loaded(bufnr) end,
    vim.api.nvim_list_bufs()
  )

  return vim.tbl_map(vim.api.nvim_buf_get_name, listed_buffers)
end

---Get unique name for the current buffer
---@param filename string
---@param shorten boolean
---@return string
local function get_unique_filename(filename, shorten)
  local filenames = vim.tbl_filter(
    function(filename_other) return filename_other ~= filename end,
    get_current_filenames()
  )

  if shorten then
    filename = vim.fn.pathshorten(filename)
    filenames = vim.tbl_map(vim.fn.pathshorten, filenames)
  end

  -- Reverse filenames in order to compare their names
  filename = string.reverse(filename)
  filenames = vim.tbl_map(string.reverse, filenames)

  local index

  -- For every other filename, compare it with the name of the current file char-by-char to
  -- find the minimum index `i` where the i-th character is different for the two filenames
  -- After doing it for every filename, get the maximum value of `i`
  if next(filenames) then
    index = math.max(table.unpack(vim.tbl_map(function(filename_other)
      for i = 1, #filename do
        -- Compare i-th character of both names until they aren't equal
        if filename:sub(i, i) ~= filename_other:sub(i, i) then return i end
      end
      return 1
    end, filenames)))
  else
    index = 1
  end

  -- Iterate backwards (since filename is reversed) until a "/" is found
  -- in order to show a valid file path
  while index <= #filename do
    if filename:sub(index, index) == "/" then
      index = index - 1
      break
    end

    index = index + 1
  end

  return string.reverse(string.sub(filename, 1, index))
end

But it only works when I move through the buffers and load both the `init.lua files.

[aspeddro]

Thank you @olimorris.

Replace table.unpack -> unpack