Re: Is there something similar to nix overlays in guix?

[Adonay Felipe Nogueira]

Em 05/03/2021 16:20, Vinícius dos Santos Oliveira escreveu:
> You don't want to be a slave to upstream developers' decisions and
> want to apply out-of-tree patches that automatically propagate to the
> rest of the packages ecosystem.

I don't know the specifics of the non-free software Nix, but by experience I 
think that one of those might suit your case:

a) the (package (source (origin (patches …) …) …) …) definition, where stuff is 
applied right after being unpacked/extracted, before configuring and building. 
If you are dealing with GNU FSDG issues or things which will be upstreamed, 
this would be the perfect place for the patch since you wouldn't be forcing the 
source package to use Guix's store paths or Guix-specific changes. It also 
means that people who do guix build -S will receive the source with patches 
applied;

b) an invocation of GNU patch from (package (arguments (modify-phases …) …) …), 
allowing you to do as (a) but for Guix-specific changes;

c) use of (package (replacement …) …) to your own package definitions to 
provide grafts (see `info guix "Security Updates" ` for the requirements and 
caveats), but note that, since I don't use this option, I don't know much about 
how to implement it;

d) invoking guix build — or those with support for its transformation options — 
with --with-patches=PACKAGE=FILE, to do it like (a);

e) same as (d), but with --with-grafts=PACKAGE=REPLACEMENT, to do it like (c);

f) same as (d), but with --with-latest=PACKAGE, to force a given 
build/install/upgrade to use the latest known version of PACKAGE instead of the 
one from the built package's definition. This of course comes at a price, as 
can be read on `info guix "Package Transformation Options" `


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