Bug#1035704: proj: reproducible-builds: timezone-dependent timestamps in .gsb/.gtx files

[Sebastiaan Couwenberg]

On 5/29/23 06:13, Vagrant Cascadian wrote:
> On 2023-05-29, Sebastiaan Couwenberg wrote:
>> On 5/28/23 23:38, Vagrant Cascadian wrote:
>>> That said, I think it really is the touch commands in debian/datumgrids*
>>> as touch's timestamp modification is timezone dependent in many cases...
>>>
>>> The attached patch fixes this by setting the TZ=UTC as an environment
>>> variable in the debian/datumgrids*.shar files.
>>>
>>> I also had success with a patch where the touch calls are done with
>>> --date=${SOURCE_DATE_EPOCH} which also worked for me (as touch assumes
>>> to be TZ=UTC in this case)... if that would be preferable, I can also
>>> provide a patch for that.
>>
>> Patching the shar files is not ideal, when their content is modified
>> these changes will be lost.
>>
>> shar/unshar should be more likely be patched.
>>
>> Does TZ=UTC also work when set in the environment? If so, that could be
>> passed to the unshar commands in d/rules.
> 
> I would expect that to work as well, which I though of shortly after
> sending the updated patch... though did not yet test it!

Can you test that? Otherwise we'll have to upload to experimental.

Kind Regards,

Bas

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