From: David Kastrup <dak@gnu.org>
Date: Sat, 22 Sep 2007 11:07:04 GMT
Subject: Re: [PATCH] Allow shell scripts to run with non-Bash /bin/sh
Message-ID: <85ps0buffr.fsf@lola.goethe.zz>
In-Reply-To: <7vd4wbgp9t.fsf@gitster.siamese.dyndns.org>

Junio C Hamano <gitster@pobox.com> writes:

> David Kastrup <dak@gnu.org> writes:
>
>> Eygene Ryabinkin <rea-git@codelabs.ru> writes:
>>
>>>> That is, what does the shell say if you do this?
>>>> 
>>>> 	case Ultra in
>>>>         Super)
>>>>         	false ;;
>>>> 	Hyper)
>>>>         	true ;;
>>>> 	esac &&
>>>>         echo case returned ok
>>>
>>> It says 'case returned ok', so I will try to understand why it
>>> works here and does not work in the 'while' construct.
>>
>> What you actually need to do is
>>
>> false
>> case Ultra in
>>    Super)
>>    	false ;;
>> Hyper)
>>    	true ;;
>> esac && echo case returned ok
>
> AHHHHHH.
>
> Is "case" supposed to be transparent?

Not that I would know.  It is basically a revival of the

false
if false then : ; fi || echo "this fails!?!"

bug that probably has been fixed by now.  For obvious reasons,
conditionals without a taken branch are considered to have an exit
code of 0.

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum