Groups > linux.debian.maint.python > #7790

Does “${python3:Depends}” reliably generate correct dependencies?

Path	csiph.com!eternal-september.org!feeder.eternal-september.org!aioe.org!bofh.it!news.nic.it!robomod
From	Ben Finney <ben+debian@benfinney.id.au>
Newsgroups	linux.debian.maint.python
Subject	Does “${python3:Depends}” reliably generate correct dependencies?
Date	Sun, 25 Oct 2015 06:20:01 +0100
Message-ID	<qnlSN-643-1@gated-at.bofh.it> (permalink)
X-Original-To	debian-python@lists.debian.org
X-Mailbox-Line	From debian-python-request@lists.debian.org Sun Oct 25 05:17:39 2015
Old-Return-Path	<debian-python@m.gmane.org>
X-Amavis-Spam-Status	No, score=-6.821 tagged_above=-10000 required=5.3 tests=[BAYES_00=-2, HEADER_FROM_DIFFERENT_DOMAINS=0.001, LDO_WHITELIST=-5, RCVD_IN_DNSWL_LOW=-0.7, SARE_HEAD_8BIT_SPAM=0.888, T_RP_MATCHES_RCVD=-0.01] autolearn=ham autolearn_force=no
X-Policyd-Weight	using cached result; rate:hard: -6.1
X-Injected-Via-Gmane	http://gmane.org/
Lines	36
MIME-Version	1.0
Content-Type	text/plain; charset=utf-8
Content-Transfer-Encoding	8bit
X-Gmane-NNTP-Posting-Host	jigong.madmonks.org
X-Public-Key-ID	0xAC128405
X-Public-Key-Fingerprint	517C F14B B2F3 98B0 CB35 4855 B8B2 4C06 AC12 8405
X-Public-Key-URL	http://www.benfinney.id.au/contact/bfinney-pubkey.asc
X-Post-From	Ben Finney <bignose+hates-spam@benfinney.id.au>
User-Agent	Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux)
Cancel-Lock	sha1:dEVlq2L0+LDPMx84dh0obaff7GY=
X-Mailing-List	<debian-python@lists.debian.org> archive/latest/13102
List-ID	<debian-python.lists.debian.org>
List-URL	<https://lists.debian.org/debian-python/>
List-Archive	https://lists.debian.org/msgid-search/85twpfo7c2.fsf@benfinney.id.au
Approved	robomod@news.nic.it
Organization	linux.* mail to news gateway
Sender	robomod@news.nic.it
X-Original-Date	Sun, 25 Oct 2015 16:17:17 +1100
X-Original-Message-ID	<85twpfo7c2.fsf@benfinney.id.au>
X-Original-X-Complaints-To	usenet@ger.gmane.org
Xref	csiph.com linux.debian.maint.python:7790

Show key headers only | View raw

Howdy all,

If we set “Depends: ${python3:Depends}” in the binary package, and use
‘dh_python3’, is that all that is needed to ensure the correct
dependencies on Python 3 versions?

Recently I received this bug report (Bug#802889):

    please don't depend on all python3 versions, forcing the
    installation of all python versions shouldn't be enforced for a
    module.

    $ apt-cache show python3-coverage | grep Depends
    Depends: python3-pkg-resources, python3 (<< 3.6), python3 (>= 3.4~),
    python3.4, python3.5, libc6 (>= 2.4)

    <URL:https://bugs.debian.org/802889>

So far as I can tell, these dependencies are generated because
“Depends: […] ${python3:Depends}” is in that “Package” definition.

On a Debian Sid system today, building a package for Python 3, along
with its extension modules, means building it for all supported Python 3
versions. Are the above dependencies wrong for that?

If the dependencies are incorrect, what should be used in the Depends
field instead of “${python3:Depends}”?

If the dependencies are correct, exactly what should I say in
explanation to the reporter of Bug#802889?

-- 
 \         “Smoking cures weight problems. Eventually.” —Steven Wright |
  `\                                                                   |
_o__)                                                                  |
Ben Finney

Back to linux.debian.maint.python | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Does “${python3:Depends}” reliably  generate correct dependencies? Ben Finney <ben+debian@benfinney.id.au> - 2015-10-25 06:20 +0100
  Re: Does “${python3:Depends}”  reliably generate correct dependencies? Brian May <brian@linuxpenguins.xyz> - 2015-10-25 08:00 +0100
  Re: Does “${python3:Depends}” reliably generate correct dependencies? Scott Kitterman <debian@kitterman.com> - 2015-10-25 10:10 +0100
    Re: Does “${python3:Depends}” reliably generate  correct dependencies? Dmitry Shachnev <mitya57@debian.org> - 2015-10-25 10:20 +0100
    Re: Does “${python3:Depends}”  reliably generate correct dependencies? Piotr Ożarowski <piotr@debian.org> - 2015-10-25 10:40 +0100
  Re: Does “${python3:Depends}”  reliably generate correct dependencies? Piotr Ożarowski <piotr@debian.org> - 2015-10-25 10:30 +0100

csiph-web