Re: [PATCH 0/3] Add a generalized `wrap-language-programs`

[Alex Sassmannshausen <alex.sassmannshausen@gmail.com>]

Hi Ludo,

Ludovic Courtès writes:

> Hi Alex,
>
> Alex Sassmannshausen <alex.sassmannshausen@gmail.com> skribis:
>
>>> You may try e.g. scons, pip, sphinx, or youtube-dl.
>>
>> Hartmut was kind enough to suggest the above python applications to test
>> this `wrap-language-programs` patch set against, however I have been
>> stuck in "Rebuild the world"-hell for the last day and a half setting up
>> testcases.
>>
>> I end up feeling a bit desesperated and incompetent, as I'm sure it's
>> not supposed to be this hard to create an appropriate test scenario here
>> — so I was wondering whether anyone has any pointers in avoiding
>> constantly rebuilding the world?
>
> The patch set you posted modifies (guix build utils), which is a module
> every single derivation uses.  That’s why modifying it leads to a full
> rebuild.

That too, makes a whole load of sense.  Thank you for explaining this to
me!

> To test ‘wrap-language-programs’ while avoiding a full rebuild, you
> could for instance add that procedure to (guix build
> python-build-system), in which case you’d have to rebuild “only” Python
> packages (but not Python itself), or you could introduce a new module
> and use that selectively.

Right, that seems absolutely clear now with your explanation above :-)

> I hope this clarifies and helps a bit!

Indeed it does, thank you!

Alex