[bug#38408] [PATCH v9 0/8] recursive semver crate importer!

[Leo Famulari]

On Tue, Feb 04, 2020 at 07:18:17AM -0500, Martin Becze wrote:
> Here is the another version of the recursive semver crate importer! And 
> hopefully the best one so far. The first 3 commits actully implement the and 
> add semver support. The rest are mainly ergonomics such as
> * triming version numbers from package name
> * better deduplication of dependencies
> * top level importing of development dependenies

Wow, this is great! It makes it possible to get a (very close to)
working rav1e package. The only things really missing are non-Rust
dependencies of rav1e but I think that is not in scope for your
importer.

> I think it has incorpated the feedback i got from everyone so far, but if i 
> forgot something or if there is more to add let me know!

A minor bug: Sometimes if a dependency is already existing, the importer
will construct its variable name incorrectly.

For example, some of the packages I imported require version 2.33 of
rust-clap.  We already have this package, and the variable is named
'rust-clap-2', but the importer makes the packages depend on
'rust-clap-2.33'. It has to be adjusted by hand.

You should be able to reproduce the bug with the following command. It
doesn't matter if guile-semver is a hard dependency or autoloaded.

`guix environment guix --ad-hoc guile-json guile-semver -- ./pre-inst-env guix 
import crate --recursive rav1e`

Also, it prints the skip-build? argument on multiple lines, like this...

#:skip-build?
#t