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Re: antioxidant-build-system can be tested as a channel, + > GTK app 'c

From: Maxime Devos
Subject: Re: antioxidant-build-system can be tested as a channel, + > GTK app 'castor' builds
Date: Tue, 31 May 2022 20:16:24 +0200
User-agent: Evolution 3.38.3-1 schreef op di 31-05-2022 om 17:45 [+0000]:
> Hi Maxime,
> > 
> > Non-goals:
> > 
> > * Produce exactly the same binaries with exactly the same dependencies as 
> > with
> > Cargo. If you want to reproduce a binary produced with Cargo, use Cargo.
> > 
> If I compile project P to produce binary A (with antioxidant) and binary C
> (with Cargo), will A and C have the same functionality?

If nothing weird is going on, yes.  Though antioxidant and Cargo have
different methods for selecting ‘features’, so a creative Rust app
author could engineer things such that when compiled with Cargo, the
app prints "hello cargo" and when compiled with antioxidant, it prints
"hello antioxidant".

I expect such situations to be the exception though, and if such a
thing happens, a $GUIX_PACKAGER could manually choose the right set of
‘features’ and put an outdated dependency in inputs/native-inputs if

That said, I haven't ‘tried out’ many of the Rust apps, mostly only
built them.

> And for dependencies not being the same, is this just limited to using the 
> latest version of crates instead of following the versions in Cargo.toml?

If you feed antioxidant-build-system the exact same versions
of dependencies as specified in Cargo, in principle you should
get something equivalent (except maybe for feature flags because
antioxidant has a different procedure for automatically selecting
feature flags, but if you really want to, you as writer of the
package definition could manually pick the features such that they
match 100% with those that Cargo would have picked).

However, the package transformation procedures in the antioxidant
channel for turning Cargo packages into antioxidant packages currently
often just select the latest version.


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