[Debian-med-packaging] Bug#847234: Please help with symlink_to_dir expression (Was: Bug#847234: r-cran-rcurl: directory vs. symlink conflict: /usr/lib/R/site-library/RCurl/examples)

[Christian Seiler]

On 12/06/2016 11:22 PM, James Cowgill wrote:
> Hi,
> 
> On 06/12/16 21:36, Andreas Tille wrote:
>> On Tue, Dec 06, 2016 at 07:06:39PM +0100, Andreas Beckmann wrote:
>>> Package: r-cran-rcurl
>>> Version: 1.95-4.8-1
>>> Severity: serious
>>> User: debian-qa at lists.debian.org
>>> Usertags: piuparts
>>>
>>> ...
>>> >From the attached log (usually somewhere in the middle...):
>>>
>>> 2m19.9s INFO: dirname part contains a symlink:
>>>   /usr/lib/R/site-library/RCurl/examples/CIS (r-cran-rcurl) != /usr/share/doc/r-cran-rcurl/examples/CIS (?)
>>>     /usr/lib/R/site-library/RCurl/examples -> ../../../../share/doc/r-cran-rcurl/examples
>>>   /usr/lib/R/site-library/RCurl/examples/CIS/cis.R (r-cran-rcurl) != /usr/share/doc/r-cran-rcurl/examples/CIS/cis.R (?)
>>>     /usr/lib/R/site-library/RCurl/examples -> ../../../../share/doc/r-cran-rcurl/examples
>>> ...
>>
>> I tried to fix this the following way.  In the Jessie package
>> r-cran-rcurl_1.95-4.3-1+deb8u1_amd64.deb the examples link is:
>>
>>
>> $ readlink /usr/lib/R/site-library/RCurl/examples 
>> ../../../../share/doc/r-cran-rcurl/examples
>>
>>
>> Since in the package in unstable examples is a directory I tried
>> to fix the upgrade path by
>>
>>
>> $ cat debian/maintscript
>> symlink_to_dir /usr/lib/R/site-library/RCurl/examples ../../../../share/doc/r-cran-rcurl/examples 1.95-4.3-1
> 
> The version number should be the version number immediately before the
> one where the dpkg-maintscript stuff is added, not when the symlink was
> converted to a directory.
> 
> In this case you probably want to use "1.95-4.8-2~" (if the bug is fixed
> in 1.95-4.8-2).

I wouldn't use that version if you ever want to backport that specific
version of the package, it's better to specify the previous Debian
version directly, in this case 1.95-4.8-1.

Regards,
Christian