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Subject: Re: Equivalent of set -- *(DN) in sh
From: Nikolai Weibull <now@disu.se>
To: Eric Cook <llua@gmx.com>, "zsh-users@zsh.org" <zsh-users@zsh.org>
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On Tue, Jan 20, 2015 at 12:05 AM, Stephane Chazelas
<stephane.chazelas@gmail.com> wrote:

> Another approach that only relies on reading the directory
> contents (not "stat"ing the files):
>
> set -- [*] *
> case $1$2 in
>   '[*]*') shift 2;;
>   *) shift
> esac
> IFS=3D" "
> set -- .[.]?* ${1+"$@"}
> case $1 in '.[.]?*') shift; esac
> set -- .[[]'!.]?*' .[!.]?* ${1+"$@"}
> case $1$2 in
>   '.[[]!.]?*.[!.]?*') shift 2;;
>   *) shift
> esac
>
> (won't give the same order as *(ND) either).

How about

set x *; shift
test $# -eq 1 && test "x$1" =3D x\* && ! test -e \* && shift
n=3D$#
set x .[!.]* ${1+"$@"}; shift
test $# -eq `expr $n + 1` && test "x$1" =3D 'x.[!.]?*' && ! test -e
'.[!.]?*' && shift
n=3D$#
set x ..?* ${1+"$@"}; shift
test $# -eq `expr $n + 1` && test =3D"x$1" =3D 'x..?*' && ! test -e '..?*' =
&& shift

This tries to avoid using test -e (or whatever version of testing for
a files existence you=E2=80=99d like to use), but also avoids using pattern=
s
just to test for failures to avoid unnecessary directory traversals.

It also avoids messing with IFS, but perhaps that=E2=80=99s necessary?

The ${1+"$@"} is to avoid an old Zsh bug, right?

It also avoids set --, as that=E2=80=99s apparently not portable either.