Re: rust (build system) deficits

[John Soo]

Hi Hartmut,

> On Mar 8, 2020, at 10:16 AM, Hartmut Goebel <address@hidden> wrote:

The much more serious issue is that we are not able to build non-trivial
Rust applications: Given a package which needs to add phases, e.g. for
fixing Cargo.toml, we would need to run each package's phases when
building any depending package.

Hmm. Can you elaborate more on “not able to build non-trivial rust 
applications”?  It seems like we have finally made some progress on building 
some rust apps.  Patching a library Cargo.toml seems like an excellent job for 
source patches or snippets. Modifying an executable’s Cargo.toml to refer to 
guix-vendor happens during a phase that matters (because the executable will be 
built).

We also already have solutions for removing censored code for c library 
wrappers.

Clearly the situation is not ideal, but I do think there are improvements to 
take just with what we have now.

Kindly,

John