[mythtv] Ad ticket #13567: Revise dependencies for packaging

[Bill Meek]

On 2/4/20 4:32 AM, Mike Bibbings wrote:
> On 02/02/2020 15:26, Bill Meek wrote:
>> On 2/2/20 6:47 AM, Paul Harrison wrote:
>>> On 29/01/2020 19:03, Roland Ernst wrote:
>>>
>>>> I'd really like to have MythTV v31 for Debian/Ubuntu released
>>>> without dependencies to python2.
>>>>
>>>> Current situation:
>>>> The deb packages produced by 'ppa:mythbuntu/31' have dependencies
>>>> to python2 but do not install the MythTV Python Bindings for
>>>> python2, only for python3. Therefore, users do not have a working
>>>> solution for the MythTV Python Bindings with python2 out of the box.
>>>>
>>>> Since the release notes for MythTV v31 at
>>>> https://www.mythtv.org/wiki/Release_Notes_-_31
>>>> marked python2 support as deprecated, is it enough to
>>>> provide a user-script that installs the Python Bindings for
>>>> python2 based on the already installed version for python3?
>>>>
>>>> This script could be placed on the wiki and linked from the
>>>> official release notes with a notification, like
>>>> "Debian/Ubuntu users still requiring python2 support need to
>>>> follow instructions on..."
>>>>
>>>> This script will extract the installed Python3 Bindings and
>>>> install it via "setup.py" for python2, either globally, or locally
>>>> for the current user. Even a "python virtual environment" setup
>>>> is possible in this case.
>>>>
>>>> I can provide this script, if agreed.
>>>>
>>>> Regards,
>>>> Roland
>>>
>>>
>>> Hi Roland,
>>>
>>>
>>> I've committed the patches from #13567 and last nights master builds have completed OK. Even Focal, which has been failing since python2 
>>> support was removed in Focal a week or two ago, build OK :). Thanks Roland!
>>>
>>>
>>> As for the script Bill is probably the one to ask about that. My personal opinion is we should be encouraging users to switch to using the 
>>> python3 bindings, the latest  version of most/all? distros are going to remove support for python2 so they wont have much choice soon. Maybe 
>>> add your script to the wiki but make it clear it's only a short term solution that wont work in the near future?
>>>
>>>
>>> Paul H.
>>
>> Hi Roland,
>>
>> My initial attempt was to modify the Makefile for the Python bindings and have it detect
>> if v3 and v2 were available. Then run setup.py for discovered Python versions. I wasn't
>> successful.
>>
>> So, I added this some time ago: https://www.mythtv.org/wiki/Python3_Conversion#Install_both_sets_of_bindings
>> and it's linked to from the release notes. It only works for those building from source
>> though.
>>
>> Roland, sounds like your script works for those not building from source. I think it
>> could live in the Python3_Conversion Wiki. If you don't have access to the Wiki
>> yet, email me a copy and I'll add it.
>>
>> For most of the time during the conversion, I ran with both v3 and v2 installed.
>>
>> As to my _deprecated_ comment in the release notes: I think it's still true. But
>> packagers make the decision. That way if there's a distro that doesn't support
>> v3, they can still choose v2.
>>
>> I posted a "Heads up" in the -users list and on the Forum.
>>
>>   https://lists.gt.net/mythtv/users/628768
>>   https://forum.mythtv.org/viewtopic.php?f=30&t=3384
>>
>> I got one and two responses respectively. Could mean it's not going to be an
>> issue, OR that folks are planning to work things out when the move to v31.
>>
>> My concern was for folks with private or Wiki tools that need conversion (and may
>> simply stop working on v31.)
>>
> Just a heads up, current mythtv-frontend from ppa:mythbuntu/31 will not install on Ubuntu 18.04 LTS as python3-imdbpy is not available.
> 
> Ticket raised https://code.mythtv.org/trac/ticket/13573#ticket
> 
> 
> Mike

I don't see any users of imdbpy in the source. Commit b5de3b264d6a2384caa9957de505d3e08f3af2ab
removed it in 2011. Looks like it was never removed from packaging. I'll take the ticket.

-- 
Bill