Re: yum list available weird output

Gerry Reno wrote:
> Gerry Reno wrote:
>> Seth Vidal wrote:
>>>
>>>
>>> On Tue, 5 May 2009, Gerry Reno wrote:
>>>
>>>> Seth Vidal wrote:
>>>>>
>>>>>
>>>>> On Tue, 5 May 2009, James Antill wrote:
>>>>>
>>>>>> Gerry Reno <[email protected]> writes:
>>>>>>
>>>>>>> I run this command:
>>>>>>> yum -q list available $(rpm -qa --queryformat=%{name}\n) | grep 
>>>>>>> "^ "
>>>>>>> 1.0.0-2.fc11
>>>>>>> preupgrade
>>>>>>> 0.1.0-6.fc11
>>>>>>> preupgrade
>>>>>>
>>>>>> Pipe the "yum list available" output through less, and you'll see
>>>>>> what is happening. In general we don't recommend screen scrapping 
>>>>>> yum
>>>>>> output, writing a yum script is often significantly easier (and
>>>>>> supported).
>>>>>>
>>>>>> For what I _think_ you are trying to do above, you probably just 
>>>>>> want
>>>>>> "yum list updates" or "yum check-update" output.
>>>>>
>>>>> and if you feel you MUST use a script to do this: look at 
>>>>> repoquery from yum-utils.
>>>>>
>>>>> -sv
>>>> Ok, through 'less' I can see that the output is being forced onto a 
>>>> second line. But rather than do that, it would be better to just 
>>>> push the output out by $COLUMNS and it would look exactly the same 
>>>> but still be on the same line.
>>>
>>> did you see what I just said?
>>>
>>> yum is NOT intended to be screen scraped. Either write a python 
>>> script or use repoquery.
>>>
>> I get your point. But people do scrape these outputs for quick 
>> scripts. If you put it on stdout people are going to scrape it pretty 
>> much. Anyway, I'll look at making a python script.
>>
> Ok, I am looking at repoquery but some of the totals do not seem to 
> add up. For example:
> repoquery -q --pkgnarrow=updates -a | wc -l
> 498
>
> Now I would expect that when I do this:
> for arch in i386 i586 i686 x86_64; do
Oops misquote : the line should have read: for arch in i386 i586 i686 
x86_64 noarch; do
> repoquery -q --pkgnarrow=updates --archlist=$arch | wc -l
> done
>
> that the totals for all the arches would equal the 'all' total. But 
> they don't. The arches totalled separately add up to more than 100 
> packages more than the 'all' total. How can that be?
>
> Regards,
> Gerry
>
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