gist-paste.vim

" Paste using [gist-paste](https://github.com/defunkt/gist).
command! -range=% -nargs=* Gistpaste call MyGistpaste(<line1>, <line2>, <f-args>)
fun! MyGistpaste(line1, line2, ...) abort
  " let args = ['-t', &ft]  " overrides -f?!
  let args = []

  " Autoset -f, if it's not given.
  if index(a:000, '-f') == -1
    let fname = fnamemodify(expand('%'), ':t')
    let ext = fnamemodify(fname, ':e')
    if !len(ext)
      let fname .= '.'.&ft
    endif
    let args += ['-f', fname]
  endif

  " Escape args.
  for a in a:000 | let args += [shellescape(a)] | endfor

  " let cmd = ':'.a:line1.','.a:line2.'w !gist-paste '.join(args, ' ')
  let output = systemlist('gist-paste '.join(args, ' '), getline(a:line1, a:line2))
  if len(output) == 1
    " Just a single line: the gist URL, use 'echom'.
    echom output[0]
  else
    " Multiple lines, e.g. from 'Gistpaste -h', use 'echo'.
    for l in output
      echo l
    endfor
  endif
endfun