An attempt at implementing support for selecta in neovim

selecta_command.vim

function! SelectaCommand(choice_command, selecta_args, vim_command)
  let dict = { 'vim_command': a:vim_command, 'temps': { 'result': tempname() }, 'name': 'SelectaCommand' }
  function! dict.on_exit(id, code)
    bd! " close terminal buffer

    if a:code == 0 " success
      if filereadable(self.temps.result)
        let l:selection = readfile(self.temps.result)[0]

        echom "selecta: selected: ".selection
        exec self.vim_command." ".l:selection
      else
        echom "selecta: error: can't read selection from (".self.temps.result.")"
      endif
    else
      echom "selecta: error: command exited (".string(a:code).")"
    endif
  endfunction

  call termopen(a:choice_command." | ~/.nvim/bin/selecta ".a:selecta_args." > ".dict.temps.result, dict)
  startinsert
endfunction