Re: rust-team branch merged

[Jason Conroy]

Hello Efraim,

Thanks for investigating this - a Rust development workflow using only Guix-native crates is something I've been waiting for!

I was experimenting with your patches and it seems that they do pull in the source crates for requested packages, but not their dependencies (example below). Is there something I'm missing?

Cheers,

Jason

$ guix shell --pure bash findutils rust-rand -- bash -c 'find -L $GUIX_ENVIRONMENT/share/cargo'
/gnu/store/zf88v65rbg2di4qhgdbvhfcjf31rdzby-profile/share/cargo
/gnu/store/zf88v65rbg2di4qhgdbvhfcjf31rdzby-profile/share/cargo/registry
/gnu/store/zf88v65rbg2di4qhgdbvhfcjf31rdzby-profile/share/cargo/registry/index
/gnu/store/zf88v65rbg2di4qhgdbvhfcjf31rdzby-profile/share/cargo/registry/index/ra
/gnu/store/zf88v65rbg2di4qhgdbvhfcjf31rdzby-profile/share/cargo/registry/index/ra/nd
/gnu/store/zf88v65rbg2di4qhgdbvhfcjf31rdzby-profile/share/cargo/registry/index/ra/nd/rand
/gnu/store/zf88v65rbg2di4qhgdbvhfcjf31rdzby-profile/share/cargo/registry/rand-0.8.5.crate
/gnu/store/zf88v65rbg2di4qhgdbvhfcjf31rdzby-profile/share/cargo/registry/config.json

On Thu, Dec 14, 2023 at 10:10 AM Efraim Flashner <efraim@flashner.co.il> wrote:

On Wed, Dec 13, 2023 at 10:34:11AM +0200, Efraim Flashner wrote:
> * Compiled rust packages currently have a 'package' phase, which runs
> the command used to crate a 'crate tarball', and is installed in
> %output/share/cargo/registry, with unpacked sources in
> %output/share/cargo/src.  In theory it should be possible to use these
> for local rust development.  The benefits include everything that comes
> with being a guix package, including pre-patched shebangs.  Currently no
> index file is created in $GUIX_ENVIRONMENT/share/cargo/registry/index,
> which is likely necessary to actually make use of this.  Additionally, I
> am unsure how to use '$GUIX_ENVIRONMENT' in ~/.cargo/config so that it
> is expanded and not taken as a literal string.

In the Guix London meetup someone mentioned that they were interested in
playing around with using Guix for rust development.  I've adjusted the
cargo-build-system to produce the registry index files and I added a
profile hook to generate the config.json to locate the packaged crates.

toml files can't process environment variables (which is probably a good
thing ...) but that means its a little harder to test out.

with the two patches applied create an environment with the crates you
want and get the location of GUIX_ENVIRONMENT:
`env | grep GUIX_ENVIRONMENT | cut -f2 -d=`

in ~/.cargo/config:
[source.crates-io]
local-registry = '<location of GUIX_ENVIRONMENT>/share/cargo/registry'

'cargo build' should pull from the local crates in the GUIX_ENVIRONMENT.
I'm not sure what happens if it doesn't have those crates available and
would need to get them from crates.io.


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Efraim Flashner   <efraim@flashner.co.il>   רנשלפ םירפא
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