Re: Antioxidant (new rust build system) update - 100% builds

[Maxime Devos]

On 02-11-2022 12:20, Ludovic Courtès wrote:
> [. ..]
> That’s <https://issues.guix.gnu.org/53127> but it probably needs work if
> we want it to work reliably on all the packages.  My understanding is
> that we’d need a “flag day” where we’d switch all Rust packages to
> Antioxydant in one commit, is that correct?  Any ideas how to achieve
> the big migration?

That's the idea I think, yes.  For this big migration, I propose to make 
the "guix style" good enough to do the switch at once (and let 
ci.guix.gnu.org build it etc. before merging).

On how to achieve this: the basic antioxidation (e.g. move 
#:cargo-inputs to inputs) is currently fully automated (*).  Then there 
is stuff like 'add this-input to that-package', which is 
'half-automated', in the sense that there are a bunch of declarative 
alists for that, interpreted automatically but declared manually; those 
could be interpreted by "guix style" as well.

Lastly, there is some more manual things too -- for making packages 
build under antioxidant, I sometimes found it convenient to update the
package (which sometimes also required packaging a dependency).  For 
those additions and updates, I propose to review+merge them (as 
cargo-build-system, not antioxidant-build-system) before the flag day / 
running "guix style".

(*) albeit at runtime, no corresponding source code tranformations (guix 
style) are written yet.

Greetings,
Maxime.

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