On Friday, March 23, 2012 2:47:22 PM UTC-5, Christian Brabandt wrote:
> Hi Marcin!
>
> On Fr, 23 M�r 2012, Marcin Szamotulski wrote:
>
> > Hello,
> >
> > I'm trying to make a nice interface for :call system(...). For this I made
> > the
> > following function:
> >
> > function! System(arg)
> > " Expand %, %:p (all modifiers are allowed except :s?pat?sub? and
> > " :gs?pat?sub?
> > return system(substitute(a:arg, '\(%\%(:[p8~.htre]\)*\)',
> > '\=expand(submatch(0))', 'g'))
> > endfunction
> >
> > The command
> > command! -nargs=1 System :echo System("<args>")
> > works as expected, but when I change it to:
>
> I am surprised, this actually works and you didn't get E176.
>
> >
> > command! -nargs=1 -complete=file System :echo System("<args>")
> >
> > and use it
> > :System ls /tmp
> > I get the E172 error. Any ideas why?
>
> You called the command with 2 arguments, but defined it to only accept
> one. That's wrong use -nargs=+ and possibly instead of "<args>" you can
> also use <q-args>
>
That's exactly what my first thought was, but then I saw :he :command-nargs,
"-nargs=1 Exactly one argument is require, it includes spaces". Unless I'm
mistaken, this actually means it will always include the rest of the
command-line (up to a " or | potentially), and include the spaces.
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