[Buildroot] [PATCH 3/6] pkg-infra: git helper creates an empty archive if PKG_VERSION is a missing hash

[Arnout Vandecappelle <arnout@mind.be>]

On 15/01/14 00:21, Yann E. MORIN wrote:
> Arnout, All,
>
> On 2014-01-14 21:43 +0100, Arnout Vandecappelle spake thusly:
>> On 13/01/14 00:44, Yann E. MORIN wrote:
>>> From: "Yann E. MORIN" <yann.morin.1998@free.fr>
> [--SNIP--]
>>> -${GIT} archive --prefix="${prefix}" --format=tar "${cset}"  \
>>> -|gzip -c >"${output}"
>>> +res=1
>>> +if ${GIT} rev-list -n 1 "${cset}" >/dev/null 2>&1; then
>>
>>   When we've done a shallow clone, this check is redundant because we have
>> cloned exactly this ref.
>>
>>   So instead, I'd do the check in the full clone condition, with an explicit
>> exit.
>
> I see. But it complexifies the script.
>
> And doing the check a second time ensures we did not download garbage
>
> Heck, there's even a race condition, since we check the remote, then
> clone it, and the ref may have vanished (granted, very unlikely, but
> yet...). :-p

  True. I yield to your wisdom.

  Regards,
  Arnout


-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
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