nnoremap <silent> <buffer> p :call MarkdownClipboardImage()<cr>

function! MarkdownClipboardImage() abort
  " Create `img` directory if it doesn't exist
  let relative_img_dir = "images"
  let absolute_img_dir = getcwd() . "/" . relative_img_dir
  if !isdirectory(absolute_img_dir)
    silent call mkdir(absolute_img_dir)
  endif

  " First find out what filename to use
  let index = 1
  let base_name = "image"
  let file_name = base_name . index . "png"
  let relative_file_path = relative_img_dir . "/" . file_name
  let file_path = absolute_img_dir . "/" . file_name
  while filereadable(file_path)
    let index = index + 1
    let file_name = base_name . index . ".png"
    let relative_file_path = relative_img_dir . "/" . file_name
    let file_path = absolute_img_dir . "/" . file_name
  endwhile

  let clip_command = 'osascript'
  let clip_command .= ' -e "set png_data to the clipboard as «class PNGf»"'
  let clip_command .= ' -e "set referenceNumber to open for access POSIX path of'
  let clip_command .= ' (POSIX file \"' . file_path . '\") with write permission"'
  let clip_command .= ' -e "write png_data to referenceNumber"'

  silent call system(clip_command)
  if v:shell_error == 1
    normal! p
  else
    execute "normal! i[". file_name . "](" . relative_file_path . ")"
  endif
endfunction