bug#44030: guix import pypi foo@1.2.3 breaks

[zimoun]

Dear,

The syntax across the different importers are not uniform.  Especially,
compare:

   guix import hackage mtl@2.1.3.1
   guix import pypi itsdangerous@1.1.0

and worse, the option ’--recursive’ leads to an error for the latter.
Note that instead:

   guix import pypi itsdangerous/1.1.0

perfectly works, even the option ’--recursive’.

All the information is there, and the UI has to be fixed.  It is a
perfect first contribution fixes.


All the best,
simon

PS:
Reported by Zelphir Kaltstahl.
<https://lists.gnu.org/archive/html/help-guix/2020-10/msg00055.html>