[gentoo-user] About python_ge­n_cond_dep

[gentoo-user] About python_ge­n_cond_dep

[Alexander Kurakin]

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As known, `python_ge­n_cond_dep` is for single implementation packages (either `p­ython-single-r1` or `distutils-r1` with `DISTUTILS_SINGLE_IM­PL=1`) where we're depending on Python packages which support multiple dependenc­ies. (Thanks Sam Jam­es.)
​
But in dev-python/tw­isted [1] we have bo­th: without `python_­gen_cond_dep` (line 27) and with `python­_gen_cond_dep` (line 58). Both of these dependencies are `PY­THON_COMPAT=( python­3_{8..11} pypy3 )` + `inherit distutils-­r1` + no set for `DI­STUTILS_SINGLE_IMPL`: [2], [3].
​
What's the differenc­e? Thanks!
​
Sincerely,
Alexander Kurakin.
---
​
[1]: https://gitweb.gento­o.org/repo/gentoo.gi­t/tree/dev-python/tw­isted/twisted-22.4.0­-r2.ebuild
[2]: https://gitweb.gento­o.org/repo/gentoo.gi­t/tree/dev-python/zo­pe-interface/zope-in­terface-5.4.0-r2.ebu­ild
[3]: https://gitweb.gento­o.org/repo/gentoo.gi­t/tree/dev-python/ap­pdirs/appdirs-1.4.4-­r2.ebuild

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Re: [gentoo-user] About python_ge­n_cond_dep

[Bryan Gardiner]

On Mon, 29 Aug 2022 12:14:59 +0300
Alexander Kurakin <kuraga333@mail.ru> wrote:

> As known, `python_gen_cond_dep` is for single implementation
> packages (either `python-single-r1` or `distutils-r1` with
> `DISTUTILS_SINGLE_IMPL=1`) where we're depending on Python packages
> which support multiple dependencies. (Thanks Sam James.)
> 
> But in dev-python/twisted [1] we have both: without
> `python_gen_cond_dep` (line 27) and with `python_gen_cond_dep` (line
> 58). Both of these dependencies are `PYTHON_COMPAT=( python3_{8..11}
> pypy3 )` + `inherit distutils-r1` + no set for
> `DISTUTILS_SINGLE_IMPL`: [2], [3].
> 
> What's the difference? Thanks!

In twisted's BDEPEND calls to python_gen_cond_dep, Python impl names
are passed after the depstring, and this looks like a way to limit
those dependencies to certain impls.  python3_11 is omitted compared
to PYTHON_COMPAT so maybe the tests don't support that yet.

Note that python_gen_cond_dep from python-r1.eclass is different from
python-single-r1.eclass, it generates dependencies using
PYTHON_TARGETS instead of PYTHON_SINGLE_TARGETS.

Cheers,
Bryan

> Sincerely,
> Alexander Kurakin.

[gentoo-user] Re: [gentoo-user] About python_gen_cond_dep

[Alexander Kurakin]

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Bryan, thanks!
 
> In twisted's BDEPEND calls to python_gen_cond_dep, Python impl names
> are passed after the depstring, and this looks like a way to limit
> those dependencies to certain impls. python3_11 is omitted compared
> to PYTHON_COMPAT so maybe the tests don't support that yet.
 
So, `python_gen_cond_dep` wouldn’t be needed if impls didn’t want to be omitted?
 
Regardless of this situation, when is `python_gen_cond_dep` needed to use?
 
Sincerely,
Alexander Kurakin.
 
 

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