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Message-ID:	<94ff3181-9b6f-4e45-bee5-bb826ad8d4aa@SystematicSW.ab.ca>
Date:	Mon, 17 Feb 2025 17:17:11 -0700
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Subject:	Re: Package 'unitS' requires python39 & requests
To:	cygwin AT cygwin DOT com
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From:	Brian Inglis via Cygwin <cygwin AT cygwin DOT com>
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On 2025-02-17 16:34, Sam Edge via Cygwin wrote:
> On 17/02/2025 23:21, Brian Inglis via Cygwin wrote:
>> On 2025-02-17 07:48, Marco Atzeri via Cygwin wrote:
>>> On 17/02/2025 15:31, Sam Edge via Cygwin wrote:
>>>> On 17/02/2025 11:29, Federico Kircheis via Cygwin wrote:
>>>>
>>>> I mentioned this a while ago but the 'units' package also has a dependency 
>>>> on 'python39' and 'python39-requests'. This is purely because of the 
>>>> currency updater script (/usr/bin/unit_cur) I believe.
>>>>
>>>> I suspect that most people who want units want it for its physical unit 
>>>> conversion functionality and the proportion using it for up-to- date 
>>>> currency conversion is probably pretty small.
>>>>
>>>> Considering this, might it be an idea to remove those dependencies?
>>>>
>>>
>>> side effect of our builing tool automatism.
>>> Removing this type of dependencies is a manual additional operation.
>>>
>>> We should modify cygport to allow some dependecies to be excluded.
>>>
>>> Time to look on it.
>>
>> Similar to other packages like this, we could split into subpackage python- 
>> units-currency-updater, require it from the main package, and announce it will 
>> not be automatically installed in the next release, and will have to be 
>> selected in setup.
>> In the following release, drop any dependency and announce that.
>> Or do so in delayed -2 and -3 releases if upstream is not updated, as it is 
>> sometimes a year or two between updates, often depending on changes in 
>> standards? See https://ftpmirror.gnu.org/units/ for dates.
>> I could prep a test release -2 and announcement, and at some future time (how 
>> long?) if no upstream updates, untest to current stable; similarly thereafter 
>> with -3?
>>
> 
> I think Marco's idea of introducing a mechanism to override the auto-depends in 
> cygport would make more sense and be more generic.
> 
> The more long term solution might be to extend the setup.ini (and setup exe) 
> semantics to have the concepts of 'required' & 'optional' or 'suggested' 
> packages similar to other package managers. Considerably more work of course.

I think we both have cygport patches we maintain locally and have offered which 
were not incorporated as utility did not outweigh stability nor generality.

In this case, I would have to manually add the dependency, as there is no 
deducible connection between the python subpackage and the base subpackage, 
similar to -doc subpackages, so could easily reverse the dependency from units 
-> updater to updater -> units.

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retrancher  but when there is no more to cut
                                 -- Antoine de Saint-Exupéry

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