Re: [PATCH] t1507: change quoting in test_did_you_mean to a more general one

From: Michael J Gruber <git@drmicha.warpmail.net>
Date: May 6, 2011, 11:10 UTC
Message-ID: <4DC3D731.3070503@drmicha.warpmail.net>
In-Reply-To: <4DC3CBEF.6080303@viscovery.net>

Johannes Sixt venit, vidit, dixit 06.05.2011 12:22:

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> Am 5/6/2011 9:43, schrieb Michael J Gruber:
>> Junio C Hamano venit, vidit, dixit 05.05.2011 22:02:
>>> Kacper Kornet <draenog@pld-linux.org> writes:
>>>> -	printf "fatal: Path '$2$3' $4, but not ${5:-'$3'}.\n" >expected &&
>>>> -	printf "Did you mean '$1:$2$3'${2:+ aka '$1:./$3'}?\n" >>expected &&
>>>> +	printf "fatal: Path '$2$3' $4, but not ${5:-\'$3\'}.\n" >expected &&
>>>> +	printf "Did you mean '$1:$2$3'${2:+ aka \'$1:./$3\'}?\n" >>expected &&
>> Other than that, I have no objections if this patch makes more shells
>> happy and no happy ones unhappy.
>>
>> Is your ksh OK with all other tests?
> 
> Note that:
> 
> - With the proposed change, bash now prints the backslashes.
> 
> - The printfs should be echos, really.

I thought printfs can be relied upon better than echos (in terms of line endings)?

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> - The behavior of quoting at the right of :- when the ${...:-...} exansion
> appears in double-quotes was debated recently at length at the Austin
> group (which revises the POSIX standard). You better move the expansions
> to assignments of temporary variables, where you don't need the
> surrounding double-quotes:
> 
> 	butnot=${5:-\'$3\'} aka=${2:+ aka \'$1:./$3\'}
> 
> Here, the backslash unambiguously quotes the next character.
> 
> -- Hannes

Whatever makes most shells happy, as long as that includes current bash...

Michael