linux-kernel - Re: [Breakage] Git v2.21.0-rc0

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Date:   Sun, 10 Feb 2019 10:40:45 +0100
From:   Johannes Sixt <j6t@...g.org>
To:     Jeff King <peff@...f.net>
Cc:     "Randall S. Becker" <rsbecker@...bridge.com>,
        "'brian m. carlson'" <sandals@...stytoothpaste.net>,
        'Junio C Hamano' <gitster@...ox.com>, git@...r.kernel.org,
        'Linux Kernel' <linux-kernel@...r.kernel.org>,
        git-packagers@...glegroups.com
Subject: Re: [Breakage] Git v2.21.0-rc0 - t5318 (NonStop)

Am 10.02.19 um 00:29 schrieb Jeff King:
> On Sat, Feb 09, 2019 at 09:39:43AM +0100, Johannes Sixt wrote:
>>  	dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" count=0 &&
>> -	dd if=/dev/zero of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" count=$(($orig_size - $zero_pos)) &&
>> +	printf "%0*d" $(($orig_size - $zero_pos)) 0 | tr 0 '\0' |
>> +		dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" &&
> 
> Using stdin instead of the tmpfile is nice, and shouldn't have any
> problems. I do think your printf suggestion looks nice, but I wondered
> if it might run into portability issues (not because of anything in
> particular, but I often find that the more clever a shell solution, the
> more likely we run into obscure problems).
> 
> But if it works everywhere, that's fine by me.

Unfortunately, it does not work as intended: the printf solution cannot
print nothing, but that should be the case in all but one of the tests.

-- Hannes