Debian Bug report logs - #814571
python-setuptools-whl and python-pip-whl: error when trying to install together

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Ralf Treinen <treinen@free.fr>

To: submit@bugs.debian.org

Subject: python-setuptools-whl and python-pip-whl: error when trying to install together

Date: Sat, 13 Feb 2016 07:27:37 +0100

Package: python-pip-whl,python-setuptools-whl
Version: python-pip-whl/8.0.2-6
Version: python-setuptools-whl/20.0-2
Severity: serious
User: treinen@debian.org
Usertags: edos-file-overwrite

Date: 2016-02-13
Architecture: amd64
Distribution: sid

Hi,

automatic installation tests of packages that share a file and at the
same time do not conflict by their package dependency relationships has
detected the following problem:


Selecting previously unselected package python-pip-whl.
(Reading database ... 10940 files and directories currently installed.)
Preparing to unpack .../python-pip-whl_8.0.2-6_all.deb ...
Unpacking python-pip-whl (8.0.2-6) ...
Selecting previously unselected package python-setuptools-whl.
Preparing to unpack .../python-setuptools-whl_20.0-2_all.deb ...
Unpacking python-setuptools-whl (20.0-2) ...
dpkg: error processing archive /var/cache/apt/archives/python-setuptools-whl_20.0-2_all.deb (--unpack):
 trying to overwrite '/usr/share/python-wheels/setuptools-20.0-py2.py3-none-any.whl', which is also in package python-pip-whl 8.0.2-6
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/python-setuptools-whl_20.0-2_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)


This is a serious bug as it makes installation fail, and violates
sections 7.6.1 and 10.1 of the policy. An optimal solution would
consist in only one of the packages installing that file, and renaming
or removing the file in the other package. Depending on the
circumstances you might also consider Replace relations or file
diversions. If the conflicting situation cannot be resolved then, as a
last resort, the two packages have to declare a mutual
Conflict. Please take into account that Replaces, Conflicts and
diversions should only be used when packages provide different
implementations for the same functionality.

Here is a list of files that are known to be shared by both packages
(according to the Contents file for sid/amd64, which may be
slightly out of sync):

  /usr/share/python-wheels/setuptools-20.0-py2.py3-none-any.whl

This bug has been filed against both packages. If you, the maintainers of
the two packages in question, have agreed on which of the packages will
resolve the problem please reassign the bug to that package. You may then
also register in the BTS that the other package is affected by the bug.

-Ralf.

PS: for more information about the detection of file overwrite errors
of this kind see http://qa.debian.org/dose/file-overwrites.html.

Message #14 received at 814571@bugs.debian.org (full text, mbox, reply):

From: Barry Warsaw <barry@debian.org>

Cc: 814571@bugs.debian.org

Subject: Re: [Python-modules-team] Bug#814571: python-setuptools-whl and python-pip-whl: error when trying to install together

Date: Sat, 13 Feb 2016 13:00:55 -0500

On Feb 13, 2016, at 07:27 AM, Ralf Treinen wrote:

>Here is a list of files that are known to be shared by both packages
>(according to the Contents file for sid/amd64, which may be
>slightly out of sync):
>
>  /usr/share/python-wheels/setuptools-20.0-py2.py3-none-any.whl
>
>This bug has been filed against both packages. If you, the maintainers of
>the two packages in question, have agreed on which of the packages will
>resolve the problem please reassign the bug to that package. You may then
>also register in the BTS that the other package is affected by the bug.

It is a bug in setuptools and I forwarded a patch to the maintainer.  I'm
happy to NMU it if preferred.

Message #25 received at 814571@bugs.debian.org (full text, mbox, reply):

From: Matthias Klose <doko@debian.org>

To: Barry Warsaw <barry@debian.org>, 814571@bugs.debian.org

Subject: Re: Bug#814571: [Python-modules-team] Bug#814571: python-setuptools-whl and python-pip-whl: error when trying to install together

Date: Mon, 15 Feb 2016 11:37:53 +0100

reassign 814571 python-pip
thanks

On 13.02.2016 19:00, Barry Warsaw wrote:
> On Feb 13, 2016, at 07:27 AM, Ralf Treinen wrote:
>
>> Here is a list of files that are known to be shared by both packages
>> (according to the Contents file for sid/amd64, which may be
>> slightly out of sync):
>>
>>   /usr/share/python-wheels/setuptools-20.0-py2.py3-none-any.whl
>>
>> This bug has been filed against both packages. If you, the maintainers of
>> the two packages in question, have agreed on which of the packages will
>> resolve the problem please reassign the bug to that package. You may then
>> also register in the BTS that the other package is affected by the bug.
>
> It is a bug in setuptools and I forwarded a patch to the maintainer.  I'm
> happy to NMU it if preferred.

No, in the first place it's a bug to not declare a proper Breaks/Replaces.  And 
yes, you asked me to remove the whl package, but without giving a reason for it 
in your forward.

Message #34 received at 814571@bugs.debian.org (full text, mbox, reply):

From: Barry Warsaw <barry@debian.org>

Cc: 814571@bugs.debian.org

Subject: Re: Bug#814571: [Python-modules-team] Bug#814571: python-setuptools-whl and python-pip-whl: error when trying to install together

Date: Mon, 15 Feb 2016 13:03:26 -0500

[Message part 1 (text/plain, inline)]

On Feb 15, 2016, at 11:37 AM, Matthias Klose wrote:

>No, in the first place it's a bug to not declare a proper Breaks/Replaces.

Well, in the meantime, you uploaded a new version of python-setuptools, so the
Breaks/Replaces that already exists in python-pip is now out of date.  But if
you agree to remove python-setuptools-whl in 20.0-3, I will update the B/R in
python-pip to match it.

>And yes, you asked me to remove the whl package, but without giving a reason
>for it in your forward.

Okay, but it was discussed fairly extensively in debian-python@ already, both
in terms of the technology and the changes in Debian Python Policy, which are
already committed to its vcs.  But to re-iterate:

Through the use of dirtbike, packages which require -whls will build them at
their own build-time, but this is limited to pip and virtualenv.  Because the
dependencies of upstream pip change, this is the only viable option for
sustainability.  Thus the previous -whl packages sprinkled throughout the
archive should now be removed.

I've included the patch here.  I'm not going to play whack-a-mole with this
bug, but it will be fixed when python-setuptools-whl is removed.

[setuptools-nowhl.diff (text/x-patch, attachment)]

[Message part 3 (application/pgp-signature, inline)]

Message #39 received at 814571-submitter@bugs.debian.org (full text, mbox, reply):

From: Barry Warsaw <barry@python.org>

To: 814571-submitter@bugs.debian.org

Subject: Bug#814571 marked as pending

Date: Mon, 15 Feb 2016 18:12:05 +0000

tag 814571 pending
thanks

Hello,

Bug #814571 reported by you has been fixed in the Git repository. You can
see the changelog below, and you can check the diff of the fix at:

    http://git.debian.org/?p=python-modules/packages/python-pip.git;a=commitdiff;h=e33082b

---
commit e33082b7e0da3202e43005e71e323c699b589086
Author: Barry Warsaw <barry@python.org>
Date:   Mon Feb 15 13:12:00 2016 -0500

    d/control: Update the python-setuptools-whl Breaks/Replaces versions. (Closes: #814571)

diff --git a/debian/changelog b/debian/changelog
index e64086c..5c534f9 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+python-pip (8.0.2-7) UNRELEASED; urgency=medium
+
+  * d/control: Update the python-setuptools-whl Breaks/Replaces versions.
+    (Closes: #814571)
+
+ -- Barry Warsaw <barry@debian.org>  Mon, 15 Feb 2016 13:05:40 -0500
+
 python-pip (8.0.2-6) unstable; urgency=medium
 
   * d/control: Fix Breaks/Replaces version on python-six-whl.  

Message #44 received at 814571-close@bugs.debian.org (full text, mbox, reply):

From: Barry Warsaw <barry@debian.org>

To: 814571-close@bugs.debian.org

Subject: Bug#814571: fixed in python-pip 8.0.2-7

Date: Mon, 15 Feb 2016 18:50:08 +0000

Source: python-pip
Source-Version: 8.0.2-7

We believe that the bug you reported is fixed in the latest version of
python-pip, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 814571@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Barry Warsaw <barry@debian.org> (supplier of updated python-pip package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Format: 1.8
Date: Mon, 15 Feb 2016 13:17:16 -0500
Source: python-pip
Binary: python-pip python3-pip python-pip-whl
Architecture: source all
Version: 8.0.2-7
Distribution: unstable
Urgency: medium
Maintainer: Barry Warsaw <barry@debian.org>
Changed-By: Barry Warsaw <barry@debian.org>
Description:
 python-pip - alternative Python package installer
 python-pip-whl - alternative Python package installer
 python3-pip - alternative Python package installer - Python 3 version of the pa
Closes: 814571
Changes:
 python-pip (8.0.2-7) unstable; urgency=medium
 .
   * d/control: Update the python-setuptools-whl Breaks/Replaces versions.
     (Closes: #814571)
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