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

[Uwe Ligges]

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-for-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)
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