OSC52 Vim support (for copying from vim via the * buffer over SSH or similar)

gistfile1.txt

function! SendViaOSC52(str) abort
  let b64 = system('printf %s ' . shellescape(a:str) . ' | base64 -w0')
  let osc = '\033]52;c;' . b64 . '\007'
  call system('printf ' . shellescape(osc) . ' > /dev/tty')
endfunction

function! CopyStarRegisterOSC52() range
  " Get the selected text
  let saved_reg = @"
  silent normal! gvy
  let selection = @"
  let @" = saved_reg
  
  " Send the selection
  call SendViaOSC52(selection)
endfunction

" Visual mode mapping
vnoremap <silent> y* :<C-U>call CopyStarRegisterOSC52()<CR>

" Command mode mapping for :'<,'>y*
command! -range Ystar <line1>,<line2>call CopyStarRegisterOSC52()
cnoreabbrev y* Ystar

" Optional: Normal mode operator
nnoremap <silent> y* :set opfunc=CopyStarRegisterOSC52<CR>g@