Re: completing dir names for a certain path?

[Matthew Woehlke]

Chet Ramey wrote:
> Matthew Woehlke wrote:
> > I have a function 'cs' that roughly looks like 'cd /some/prefix/$*', 
> > that I would like to have completion for. Any tips? (For some reason, 
> > non-trivial completions never seem to want to work for me :-(.)
>
> Why not write a shell function that prefixes the right directory to
> the word to be completed, runs compgen, and strips the prefix from the
> generated list of completions?

Because "for some reason, non-trivial completions never seem to want to 
work for me"?

Sigh. Ok, after trying for entirely too long, this seems to be working:
completeme() {
  local i=0
  while read l; do
    COMPREPLY[$((++i))]="$l"
  done < <(
    cd /some/prefix
    w="${COMP_WORDS[1]}"
    if [ -n "$w" ]
      then compgen -d "$w"
      else compgen -d
    fi
  )
}
complete -F completeme cs

...and yet, seems entirely too difficult.

Why doesn't 'complete -C' work? Why does 'compgen -d ""' produce no 
output? Shouldn't it produce the same output as 'compgen -d'?

--
Matthew
For great justice!! -- Captain (Zero Wing)