[Buildroot] [PATCH 4/5] support/download: only create final temp file when needed
Arnout Vandecappelle
arnout at mind.be
Tue Jul 8 15:53:49 UTC 2014
On 07/07/14 23:53, Yann E. MORIN wrote:
> Arnout, All,
>
> On 2014-07-07 18:08 +0200, Arnout Vandecappelle spake thusly:
>> On 06/07/14 23:27, Yann E. MORIN wrote:
[snip]
>>> +# Upon failure, git cleans behind itself, so no need to catch failures here.
>>> +# The only case when git would not clean up, is if it gets killed with SIGKILL.
>>
>> I think the SIGKILL is reason enough to do the rm explicitly in the script. Of
>> course, this is only valid if you use the trap, otherwise you never reach the rm
>
> Well, SIGKILL is not catchable. That's the main selling point of SIGKILL.
> ;-)
If git gets SIGKILLed, the shell script is still running.
>
>> (due to 'set -e').
>
> Well, 'set -e' only kicks in for the final 'mv', since all other
> commands and conditions in an if statement.
The call to git clone isn't, though.
>
> Also, I'm not a big fan of traps, although I can be abusing them from
> time to time.
I do agree that trap is mightily confusing: it has obscure syntax, and you can
easily accidentally replace an earlier trap. So in fact, it would be better not
to use 'set -e' but to put everything in conditions. But that just moves the
problem elsewhere...
Regards,
Arnout
>
> But OK, I'll add this to the TODO...
>
> Regards,
> Yann E. MORIN.
>
--
Arnout Vandecappelle arnout at mind be
Senior Embedded Software Architect +32-16-286500
Essensium/Mind http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium BE 872 984 063 RPR Leuven
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