Neo-tree

floating filesystem window at current working directory

keys = {
  {
    '\\',
    ':Neotree action=focus source=filesystem position=left toggle=true<CR>',
  },
  {
    '|',
    function()
      local function buffer_dir()
        return vim.fn.expand '%:p:h'
      end
      require('neo-tree.command').execute {
        action = 'focus',
        source = 'filesystem',
        position = 'left',
        toggle = true,
        dir = buffer_dir(),
      }
    end,
  }  
}