edit-file-under-cursor.lua

local function edit_file_under_cursor()
  vim.cmd('normal! viWo"py')
  local grabbed_string = vim.fn.getreg("p")
  vim.api.nvim_input("<ESC>")

  local file, line_number = string.match(grabbed_string, "(.-):([0-9]+)")

  if line_number == nil then
    file = grabbed_string
  end

  if vim.loop.fs_stat(vim.fn.getcwd() .. "/" .. file) ~= nil then
    vim.cmd("wincmd p")
    vim.cmd("e " .. file)

    if line_number ~= nil then
      vim.cmd("normal " .. line_number .. "gg")
    end
  end
end

vim.keymap.set("n", "<leader>gf", edit_file_under_cursor)