[R-pkg-devel] Checksums changed on CRAN without any visible modifications to files.

[Joris Meys]

Correction: In the case of mgcv it was the publication date that changed
for some reason. Our sysadmins keep reaching out to me in the hope to
resolve this. Is there a way they can reach out so this can be clarified?

For reference, the latest issue on mgcv :
https://github.com/easybuilders/easybuild-easyconfigs/issues/6501

Cheers
Joris

On Wed, Jun 27, 2018 at 3:30 PM, Joris Meys <Joris.Meys using ugent.be> wrote:

> Dear Uwe,
>
> sorry to bother you again with it, but I was wondering if you had some
> more idea about what happened. I just received another one, this time about
> mgcv_1.8-23.tar.gz. It goes beyond my understanding as to why the MD5 sums
> would change without any change to the package. Is there anything I can
> check at this side to make it easier for you?
>
> Cheers
> Joris
>
> On Thu, Jun 14, 2018 at 6:55 PM, Joris Meys <Joris.Meys using ugent.be> wrote:
>
>> Dear Uwe,
>>
>> Thank you for willing to take a look. In the report it was about the
>> following tarballs :
>>
>> pkgmaker_0.22.tar.gz
>> rngtools_1.2.4.tar.gz
>> RcppProgress_0.4.tar.gz
>>
>> Our sysadmin tried diff -ru, but couldn't find any difference in the text
>> files.
>>
>> Cheers
>> Joris
>>
>> On Thu, Jun 14, 2018 at 5:46 PM, Uwe Ligges <
>> ligges using statistik.tu-dortmund.de> wrote:
>>
>>>
>>>
>>> On 13.06.2018 15:40, Joris Meys wrote:
>>>
>>>>
>>>>
>>>> On Wed, Jun 13, 2018 at 3:16 PM, Uwe Ligges <
>>>> ligges using statistik.tu-dortmund.de <mailto:ligges using statistik.tu-dortmund.de>>
>>>> wrote:
>>>>
>>>>
>>>>     When CRAN repacks and changes the DESCRIPTION file, the checksums
>>>>     change, of course.
>>>>
>>>>     Best,
>>>>     Uwe Ligges
>>>>
>>>>
>>>> Dear Uwe,
>>>>
>>>> I understood that from the previous issue. In this case however, none
>>>> of the files -including the DESCRIPTION file- were changed. Am I right in
>>>> suspecting that a package is repacked when moved to the archive?
>>>>
>>>
>>> No, we do not repack generally then. Perhaps the package got orphaned?
>>>
>>>
>>> Which package / tarball were you talking about? I can take a look why
>>> that one was changed and inspect why the checksum changed.
>>>
>>> Best,
>>> Uwe Ligges
>>>
>>>
>>>
>>>  I
>>>
>>>> suspect that the tool used to repack the package is using gzip, and it
>>>> is possible to repack without adding a timestamp as explained here :
>>>>
>>>> https://serverfault.com/questions/110208/different-md5sums-f
>>>> or-same-tar-contents
>>>>
>>>> I can explain the different checksums when some things are changed to
>>>> our HPC sysadmins, but they have -understandibly- difficulties with
>>>> checksums changing for released source tarballs. Is it possible to adapt
>>>> the archiving so that at least for identical tarballs the md5 sums remain
>>>> the same? Or if you have other suggestions to deal with this without having
>>>> to change hardcoded checksums in the easybuild repos, that would be very
>>>> welcome too.
>>>>
>>>> Cheers
>>>> Joris
>>>>
>>>> --
>>>> Joris Meys
>>>> Statistical consultant
>>>>
>>>> Department of Data Analysis and Mathematical Modelling
>>>> Ghent University
>>>> Coupure Links 653, B-9000 Gent (Belgium)
>>>> <https://maps.google.com/?q=Coupure+links+653,%C2%A0B-9000+G
>>>> ent,%C2%A0Belgium&entry=gmail&source=g>
>>>>
>>>> tel: +32 (0)9 264 61 79
>>>> -----------
>>>> Biowiskundedagen 2017-2018
>>>> http://www.biowiskundedagen.ugent.be/
>>>>
>>>> -------------------------------
>>>> Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php
>>>>
>>>
>>
>>
>> --
>> Joris Meys
>> Statistical consultant
>>
>> Department of Data Analysis and Mathematical Modelling
>> Ghent University
>> Coupure Links 653, B-9000 Gent (Belgium)
>>
>> <https://maps.google.com/?q=Coupure+links+653,%C2%A0B-9000+Gent,%C2%A0Belgium&entry=gmail&source=g>
>>
>> tel: +32 (0)9 264 61 79
>> -----------
>> Biowiskundedagen 2017-2018
>> http://www.biowiskundedagen.ugent.be/
>>
>> -------------------------------
>> Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php
>>
>
>
>
> --
> Joris Meys
> Statistical consultant
>
> Department of Data Analysis and Mathematical Modelling
> Ghent University
> Coupure Links 653, B-9000 Gent (Belgium)
>
> <https://maps.google.com/?q=Coupure+links+653,%C2%A0B-9000+Gent,%C2%A0Belgium&entry=gmail&source=g>
>
> tel: +32 (0)9 264 61 79
> -----------
> Biowiskundedagen 2017-2018
> http://www.biowiskundedagen.ugent.be/
>
> -------------------------------
> Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php
>



-- 
Joris Meys
Statistical consultant

Department of Data Analysis and Mathematical Modelling
Ghent University
Coupure Links 653, B-9000 Gent (Belgium)
<https://maps.google.com/?q=Coupure+links+653,%C2%A0B-9000+Gent,%C2%A0Belgium&entry=gmail&source=g>

tel: +32 (0)9 264 61 79
-----------
Biowiskundedagen 2017-2018
http://www.biowiskundedagen.ugent.be/

-------------------------------
Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php

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