[CMake] Tracking progress of CMake TAR

[Eric Noulard]

Le lun. 17 déc. 2018 à 17:17, Person Withhats <personwithhats2 at gmail.com> a
écrit :

> It's untarring around 1.5GB of SDK's, I don't think listing 1000's of
> files is going to help.
>

Yes right.
You need some "size extraction progress" not number of files progress.

I'm not sure classical un-archive program do have the feature.

I'm pretty sure that "working progress bar" is most of the time very
difficult to implement:
https://ux.stackexchange.com/questions/11881/progress-bars-why-are-they-never-useful

I was hoping for some sort of progress bar or the like,
>

I'm pretty sure cmake -E tar does not have this feature.
Genuine unix tar command does not have such feature and some people uses
'pv' (http://www.ivarch.com/programs/pv.shtml)
for that very same purpose
e.g.
https://superuser.com/questions/168749/is-there-a-way-to-see-any-tar-progress-per-file

I guess the issue is the same for other archive tool including zip:
https://askubuntu.com/questions/909918/q-how-to-show-unzip-progress

CMake is using libarchive for handling various archive files (including
tar) libarchive seems to have
some feature for progress display (
https://github.com/libarchive/libarchive/wiki/ManPageArchiveReadExtract3)
but CMake code is not using it in any way.


> and yes I'm using cmake -E tar .-.
>
> Any ideas?
>

Beside non-portable way no.


>
> On Mon, Dec 17, 2018 at 7:16 AM Eric Noulard <eric.noulard at gmail.com>
> wrote:
>
>> I guess he is using
>>
>> cmake -E tar
>>
>> may be using 'v' verbose option from tar  should be enough.
>>
>> i.e.
>> cmake -E tar xvz your-archive.tar.gz
>>
>> It should display file names as they come out of the archive.
>> So unless your very big archive only contains relatively big files, the
>> output should evolve quite often.
>>
>> Eric
>>
>>
>> Le lun. 17 déc. 2018 à 15:46, Ian Cullen <ian.james.cullen at gmail.com> a
>> écrit :
>>
>>> Are you calling tar via a custom command?  tar itself looks to have a
>>> few options to print progress:
>>>
>>> https://www.gnu.org/software/tar/manual/html_section/tar_25.html
>>>
>>> Although none of the options seem to know the archive's size, so aren't
>>> able to print a completion percentage.
>>>
>>>
>>> On 16/12/2018 21:31, Person Withhats wrote:
>>>
>>> When running tar via CMake (in order to use cross-platform work-ability
>>> and what not) it'd be great to have a progress bar of any sort.
>>>
>>> It's awkward to wait 30-60 minutes for file untarring with absolutely 0
>>> information. I'm not aware of any way to do this through CMake directly,
>>> only alternative is e.g. python script that does the untar for me.
>>>
>>> Any suggestions? (sorry if this is reposted, can't remember if acc was
>>> approved before or after sending one time)
>>>
>>>
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>>
>> --
>> Eric
>> --
>>
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-- 
Eric
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