bug#49168: ‘guix import pypi’ misses package dependencies

["Ludovic Courtès" <ludo@gnu.org>]

Hi,

Leo Prikler <leo.prikler@student.tugraz.at> skribis:

> Am Dienstag, den 22.06.2021, 14:33 +0200 schrieb Ludovic Courtès:

[...]

>> Actually
>> <
>> https://files.pythonhosted.org/packages/fe/9d/4e15b2e74044ee051b6939c1b3ff716b0106e8f72d78eab8e08212eab44c/tablib-3.0.0.tar.gz
>> >
>> does not have a ‘requirements.txt’ file, and
>> <
>> https://files.pythonhosted.org/packages/16/85/078fc037b15aa1120d6a0287ec9d092d93d632ab01a0e7a3e69b4733da5e/tablib-3.0.0-py3-none-any.whl
>> >
>> doesn’t have much metadata, so I don’t even get where were get that
>> info.
> It does, but it's well hidden in the src tree.  I peeked into the guix
> import code to find it.

Indeed.  The tarball above has ‘tests/requirements.txt’:

--8<---------------cut here---------------start------------->8---
pytest
pytest-cov
MarkupPy
odfpy
openpyxl>=2.6.0
pandas
pyyaml
tabulate
xlrd
xlwt
--8<---------------cut here---------------end--------------->8---

There are no optional dependencies in that file, though.  Or were you
looking at something else?

>> As for emitting comments, the (not-so-) pretty printer written for
>> ‘guix
>> style’¹ could come in handy for importers and more generally in any
>> place where we need to emit comments.
> Indeed, I wasn't thinking about that when I wrote this reply, but I see
> what you mean.  Should we strive to have such a pretty-printer in Guile
> as well or do we keep it to ourselves for now? :)

Let’s nurture it in Guix and move it to Guile when it looks better.
Likewise, we should have support for comments directly in (ice-9 read).

Ludo’.