I have opened https://trac.sagemath.org/ticket/31485 - Meta-ticket: Sage on 
WSL (Windows Subsystem for Linux)



On Wednesday, March 10, 2021 at 1:10:01 PM UTC-8 emanuel.c...@gmail.com 
wrote:

> On Tarc#31409 <https://trac.sagemath.org/ticket/31409>, E. Madison Bray 
> proposed to make R an optionalpackage only on Windows (which should be made 
> possible by an upcoming patch of Matthias Koeppe).
>
> I replied :
>
> Aaaaarghhh…
> This would be a documentation nightmare (explaining why a ticket is 
> “optionally optional” is awkward at the very minimum…). It would also 
> “froze” the idea of Windows 10 being a “second-class citizen” as far as 
> Sage is concerned.
>
> I’m starting to consider promoting a WSL2 port as the preffered windows 
> platform,and preparing a deprecation of the Cygwin port, which remains 
> necessary as long as Windows versions <10 remain relevant only as rthe 
> “sanest” way out of this predicament (“sane” being an hyperbole, of 
> course…).
>
> This, IMHO, deserves further discussion.
>
> Le mercredi 10 mars 2021 à 13:30:06 UTC+1, erik....@gmail.com a écrit :
>
>> On Tue, Mar 9, 2021 at 6:13 PM Nathan Dunfield <nat...@dunfield.info> 
>> wrote: 
>> > 
>> > An update: I just tried three different binary versions on Linux: The 
>> Ubuntu 20.04 binary posted at SageMath.org, the sagemath/sagemath:develop 
>> Docker image, and conda on RHEL 7. None of them "just worked" with "sage -i 
>> foo". The Docker image and conda failed completely with 
>> > 
>> > make: *** No rule to make target 'all-toolchain'. Stop. 
>> > 
>> > I got farther with the Ubuntu binary. Choosing "sage -i pyflakes", it 
>> successfully pip-installed pyflakes and then started rebuilding all of Sage 
>> from scratch, starting with libpng, pkgconf, etc. So in some sense this 
>> worked --- I was able to abort the build and import pyflakes --- but in the 
>> end was equivalent to building Sage from source if I hadn't stopped it. 
>>
>> Yes, this has been a persistent problem. It's a problem on 
>> Sage-Windows as well. In the past I've gotten it to work, but every 
>> time people make changes to the build system (which is often) it tends 
>> to break again, and as Matthias pointed out there is a not a 
>> well-established process for testing this (I try to test it manually 
>> but don't always remember to; or sometimes I do test it, but throw up 
>> my hands when it doesn't work because I don't want to hold up the 
>> release any longer). 
>>
>> A big part of the problem is that the system for installing packages 
>> is badly interwoven with the build system for Sage itself. There is a 
>> good reason for this: If one of sagelib's build dependencies is 
>> changed, it is necessary to rebuild sagelib. 
>>
>> For optional/experimental packages I think we should try to 
>> disentangle them a bit better from the "normal" build system. They 
>> really should be "drop-in" and not require a rebuild of sagelib. 
>>
>> Part of my original goals for developing the "DESTDIR" build system 
>> was so that it would eventually be easier to build binary packages for 
>> optional packages. I wanted to be able to use this on Windows, for 
>> example, by allowing users to select optional packages by just 
>> unpacking pre-built tarballs, but I never got around to materializing 
>> that goal. Of course, if such a system did exist it should be 
>> available for other platforms as well. 
>>
>>
>> > On Tuesday, March 9, 2021 at 9:00:22 AM UTC-6 Nathan Dunfield wrote: 
>> >> 
>> >> To what extent does installing optional packages "just work" with the 
>> current binary distributions of Sage? I'm thinking of both those posted on 
>> sagemath.org as well as things not directly under our control such as 
>> the sage packages for conda, debian, gentoo, etc. My past experience has 
>> been that "sage -i foo" works only if I had built Sage from source, though 
>> I haven't tried any of the binaries recently. 
>> >> 
>> >> I bring this up because the user impact of moving R or any other 
>> package to optional depends tremendously on whether "sage -i R" just works. 
>> If switching R to optional is tantamount to requiring users of R to build 
>> all of Sage from source, that would be very disruptive for those users of R 
>> in Sage. Building Sage from source is a huge hurdle for 95% users and a 
>> nontrivial hassle for the rest. 
>> >> 
>> >> Best, 
>> >> 
>> >> Nathan 
>> > 
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>>
>>
>

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