From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-users-return-21147-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 496 invoked by alias); 11 Jan 2016 11:58:13 -0000
Mailing-List: contact zsh-users-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Users List <zsh-users.zsh.org>
List-Post: <mailto:zsh-users@zsh.org>
List-Help: <mailto:zsh-users-help@zsh.org>
X-Seq: 21147
Received: (qmail 16800 invoked from network); 11 Jan 2016 11:58:12 -0000
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.0
X-AuditID: cbfec7f4-f79026d00000418a-b1-569398cf1083
Date: Mon, 11 Jan 2016 11:58:04 +0000
From: Peter Stephenson <p.stephenson@samsung.com>
To: Zsh Users <zsh-users@zsh.org>
Subject: Re: cd "" foo bug?
Message-id: <20160111115804.00a8661b@pwslap01u.europe.root.pri>
In-reply-to: <20160111112026.GA14816@linux.vnet.ibm.com>
References: <20160111112026.GA14816@linux.vnet.ibm.com>
Organization: Samsung Cambridge Solution Centre
X-Mailer: Claws Mail 3.7.9 (GTK+ 2.22.0; i386-redhat-linux-gnu)
MIME-version: 1.0
Content-type: text/plain; charset=US-ASCII
Content-transfer-encoding: 7bit
X-Brightmail-Tracker:
 H4sIAAAAAAAAA+NgFjrPLMWRmVeSWpSXmKPExsVy+t/xK7rnZ0wOMzhyRNBix8mVjA6MHqsO
	fmAKYIzisklJzcksSy3St0vgyng08xZbwTvOitPbG5gbGNewdzFyckgImEhs3r2GFcIWk7hw
	bz0biC0ksJRR4utthS5GLiB7GpPEgff3WSCcc4wSvdc3M0E4ZxkldjRtYOxi5OBgEVCV+H7O
	FKSbTcBQYuqm2YwgtoiAosSZX9+YQGxhAWmJi8t+soDYvAL2Ehu+vQO7glPAQmL1ll+MEJvN
	JR58eQhm8wvoS1z9+4kJ4jp7iZlXzjBC9ApK/Jh8D2wOs4CWxOZtTawQtrzE5jVvmSHmqEvc
	uLubfQKj8CwkLbOQtMxC0rKAkXkVo2hqaXJBcVJ6rqFecWJucWleul5yfu4mRkgwf9nBuPiY
	1SFGAQ5GJR5ehx2TwoRYE8uKK3MPMUpwMCuJ8O7OnhwmxJuSWFmVWpQfX1Sak1p8iFGag0VJ
	nHfurvchQgLpiSWp2ampBalFMFkmDk6pBkbDgt1h/+8y3uH7e5l337ofj7IubDnYvea53lHJ
	TJ1T85577DIWKqhdsKev/8aWFRz1T5RXKXUvNfhznW+P81yuXYF/wqJ0Xtmw8k6O6Hzr/u7C
	Jaa4P+8FPvDs0ZEV7XpatCAzWaL78bY5V6y/lDj8Kax85/Jc3Ffz3PsW6+f9x/odVrpaBZ5U
	YinOSDTUYi4qTgQA9bNen2ICAAA=

On Mon, 11 Jan 2016 12:20:26 +0100
Dominik Vogt <vogt@linux.vnet.ibm.com> wrote:
> cd with two arguments works fine if the second argument is an
> empty string, but not if the first argument is an empty string.
> Shouldn't it try all possible positions for the "" instead of just
> the first one?

That's not really compatible with how two-argument cd normally works.

% mkdir ~/tmp/foofoo ~/tmp/foobar
% cdpath=(~/tmp)
% cd ~/tmp/foofoo
% cd foo bar
cd: no such file or directory: /export/home/pws/tmp/barfoo

If it's going to try all possible source matches it should do it in this
case, too.  As it is, it always just tries the first match.

This sounds more like an extension for a function.  The (I) flag already
handles the special case of an empty string the way you want, so no
special cases within the function.

pws


# should handle options up here...

if (( $# == 2 )); then
  local src=$1 rep=$2 dir
  integer n=1
  while true; do
    dir=${(I:${n}:)PWD/$src/$rep}
    if [[ $dir = $PWD ]]; then
      print -r "$0: no replacements found: $PWD / \"$src\" / \"$rep\"" >&2
      return 1
    fi
    if [[ -d $dir ]]; then
      cd -- $dir
      return
    fi
    (( n++ ))
  done
else
  builtin cd "$@"
fi