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

[ludo@gnu.org (Ludovic Courtès)]

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.

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.

I hope this clarifies and helps a bit!

Ludo’.