please port duplicity to Python3

[Matthias Klose]

There is still the goal to remove Python2 from the desktop images, and to use Python3 only. deja-dup should be ported to Python3.

There seems to be some progress upstream.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Robert Ancell (robert-ancell)]

Blocks deja-dup from being updated (bug 1440370).

[Matthias Klose (doko)]

current status:
http://lists.nongnu.org/archive/html/duplicity-talk/2015-07/msg00020.html

[Barry Warsaw (barry)]

I'll note that this is less critical now that deja-dup installs duplicity on demand. Still, it would be nice.

[Dimitri John Ledkov (xnox)]

So what should we do now? To drop python2 from main, we will need to demote duplicity.

[Juha Mäkeläinen (jpek)]

This problem means, that I must manually swich default python version (by "sudo update-alternatives --config python") each time a backup is done. There is no easy automation, if I undestand.

[Matthias Klose (doko)]

no, the python symlink is not handled by alternatives. Whoever told you that, you are breaking your system.

[Sebastien Bacher (seb128)]

That would be nice to get done but that's nothing new, not discussed when we planned the cycle nor something we have capacity to do for Disco, rls-dd-notfixing

[Aaron Whitehouse (aaron-whitehouse)]

Marking this as Fix Committed, as we have Python 3 compatible code in 0.8-series with all tests also being run against this environment. We have not yet put out a 0.8 release, though.

See https://blueprints.launchpad.net/duplicity/+spec/python3

[Sebastien Bacher (seb128)]

@Aaron, that's good to know. Do you know when we can expect a 0.8 to be out?

[Will Cooke (willcooke)]

Added to Trello: https://trello.com/c/xPdjyJOw/261-bug1440372-please-port-duplicity-to-python3

[Aaron Whitehouse (aaron-whitehouse)]

@Sebastian, Kenneth is planning to release a 0.8 version very soon.

Note that I have wound the Python 3 blueprint completion back a step, as I have realised that there are some backend dependencies (e.g. pyrax) that do not work on Python 3. I believe deja dup only uses a subset of the backends anyway, so what has already been done may be sufficient once a 0.8-series release is out the door.

[Sebastien Bacher (seb128)]

Ok, 0.8 is out with pyton3 support now

[Sebastien Bacher (seb128)]

New version uploaded
https://launchpad.net/ubuntu/+source/duplicity/0.8.01-0ubuntu1

Some tests are failing on ppc64el though now, help with those would be welcome

[Matthias Klose (doko)]

the package still depends on python-lockfile.