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Bug 1738008 - freeorion depends on Python 2
Summary: freeorion depends on Python 2
Keywords:
Status: CLOSED DUPLICATE of bug 1881183
Alias: None
Product: Fedora
Classification: Fedora
Component: freeorion
Version: 31
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Link Dupont
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: F31_PY2REMOVAL 1767503
TreeView+ depends on / blocked
 
Reported: 2019-08-06 12:24 UTC by Lumír Balhar
Modified: 2023-09-12 02:05 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-09-24 17:50:33 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)

Description Lumír Balhar 2019-08-06 12:24:32 UTC 
Python 2.7 will reach end-of-life in January 2020, over 9 years after it was released. This falls within the Fedora 31 lifetime.
Packages that depend on Python 2 are being switched to Python 3 or removed from Fedora: https://fedoraproject.org/wiki/Changes/F31_Mass_Python_2_Package_Removal#Information_on_Remaining_Packages
Python 2 will be retired in Fedora 32: https://fedoraproject.org/wiki/Changes/RetirePython2

To help planning, we'd like to know the plans for freeorion's future. Specifically:


- What is the reason for the Python2 dependency? (Is it software written in Python, or does it just provide Python bindings, or use Python in the build system or test runner?) 

- What are the upstream/community plans/timelines regarding Python 3?

- What is the guidance for porting to Python 3? (Assuming that there is someone who generally knows how to port to Python 3, but doesn't know anything about the particular package, what are the next steps to take?)


This bug is filed semi-automatically, and might not have all the context specific to freeorion.
If you need anything from us, or something is unclear, please mention it here.

Thank you.
Comment 1 Link Dupont 2019-08-06 13:42:09 UTC 
FreeOrion uses Python for AI scripting. It currently supports Python 2.7. I am investigating with the upstream community how (if at all) this can be migrated to Python 3.
Comment 2 Link Dupont 2019-08-06 14:15:49 UTC 
Upstream community is already working towards migrating to Python 3.
Comment 3 Ben Cotton 2019-08-13 16:47:27 UTC 
This bug appears to have been reported against 'rawhide' during the Fedora 31 development cycle.
Changing version to '31'.
Comment 4 Lumír Balhar 2019-08-14 08:54:22 UTC 
The current plan is to remove packages with dependency on Python 2 from Fedora 32 in the middle of November 2019. If you want to keep your package in Fedora after that date and you cannot port it to Python 3 yet, you need to request a FESCo exception for the package and all its Python 2 dependencies (even transitive) [1]. If you don't want to maintain it anymore, and nothing in Fedora uses it, you can retire it or just remove the Python 2 part from it (subpackage, module, bindings, etc.).

If you're considering filing the exception request, let us know. We can help (for example, we can help find all the dependencies).

[1] https://fedoraproject.org/wiki/Changes/RetirePython2#FESCo_exceptions
Comment 5 Petr Viktorin 2019-10-31 15:10:25 UTC 
How far is the Python 3 support? Could you link to any discussion on this?
Can this be done by mid-November, or does freeorion need an exception to keep using Python 2 a bit longer?
Comment 6 Petr Viktorin 2019-11-01 08:49:34 UTC 
The boost maintainer would be very happy to drop Python 2 support: supporting a dual py2/py3 build is "a nightmare". But it is technically possible to keep boost-python2. 

Is it worth keeping python2-boost for freeorion and k3d?
Comment 7 Petr Viktorin 2019-11-05 14:45:00 UTC 
Here is a PR for using `boost169`, which will retain Python 2 support: https://src.fedoraproject.org/rpms/freeorion/pull-request/1

See discussion in https://bugzilla.redhat.com/show_bug.cgi?id=1767503
Comment 8 Gwyn Ciesla 2019-11-15 19:58:59 UTC 
FYI I'm working patching freeorion for Python 3.
Comment 9 Link Dupont 2019-11-25 00:59:35 UTC 
I've merged the PR to switch rawhide builds to using boost169. Note that this does not remove FreeOrion's runtime dependency on python2, but it does free up boost to drop Python 2 support. FreeOrion's upstream is actively working on converting their runtime code to Python 3[1].

https://github.com/freeorion/freeorion/pull/2653
Comment 10 Fedora Admin user for bugzilla script actions 2020-09-16 02:53:27 UTC 
This package has changed maintainer in the Fedora.
Reassigning to the new maintainer of this component.
Comment 11 Fedora Admin user for bugzilla script actions 2020-09-17 02:52:45 UTC 
This package has changed maintainer in the Fedora.
Reassigning to the new maintainer of this component.
Comment 12 josef radinger 2020-09-24 17:50:33 UTC 

*** This bug has been marked as a duplicate of bug 1881183 ***
Comment 13 Red Hat Bugzilla 2023-09-12 02:05:36 UTC 
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 1000 days
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