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Date: Fri, 29 Jul 2011 10:08:58 -0400 (EDT)
From: "Benjamin R. Haskell" <zsh@benizi.com>
To: Tomasz Moskal <ramshackle.industries@gmail.com>
cc: zsh-users@zsh.org
Subject: Re: how to refer to basename of $0
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On Fri, 29 Jul 2011, Tomasz Moskal wrote:

> On Thu, 2011-07-28 at 21:04 -0700, Bart Schaefer wrote:
>> On Jul 28,  9:39pm, TJ Luoma wrote:
>> }
>> } Is it even possible to set NAME in .zsh* (and have it return 
>> } 'test.zsh' or are they called too early in the process?
>>
>> This is sounding awfully familiar.  Oh, it was on zsh-workers, where 
>> some of the -users crowd would not have seen it.
>>
>> Starts here:
>>
>> http://www.zsh.org/mla/workers/2011/msg00159.html
>>
>> Interesting branch begins here:
>>
>> http://www.zsh.org/mla/workers/2011/msg00163.html
>>
>> Particularly:
>>
>> http://www.zsh.org/mla/workers//2011/msg00172.html
>
> Thanks for the links, but I am still baffled -  basename $0  is 
> working here without any problems:
>
> % cat ~/.zshenv
> unsetopt function_argzero
> name=`basename $0`
>
> % cat ./foo
> #!/bin/zsh
> . ~/.zshenv
> echo $name
> exit 0

The point wasn't quite the same (didn't involve "source"-ing .zshenv). 
$0 doesn't work if used inside startup files (.zshenv/.zshrc/.zprofile). 
When you source it manually, it's not treated specially.

Just wanted to note that the '%x' that I pointed out does work, though:

## as the first line of .zshenv (so, will be run when starting zsh)
$ sed 1q ~/.zshenv
echo in .zshenv 0=$0 %x=${(%):-%x}

## results in:
$ zsh
in .zshenv 0=zsh %x=/home/bhaskell/.zshenv

-- 
Best,
Ben