[Scons-dev] Would requiring Python 2.7.4 or above be a problem for future release?

[Ivan Van Laningham]

Thanks all for your explanations.  I hadn't realized CentOS 6 was so far
along in its lifecycle.  I've built 2.7 and 3 for my own systems.  The only
thing I use Python 2 for is Scons. ;-)

Metta,
Ivan

On Thu, Nov 19, 2015 at 1:45 PM, Bill Deegan <bill at baddogconsulting.com>
wrote:

> Ivan,
>
> Sadly supporting older versions of python will make moving forward to
> support python 3.x impossible.
> In general the current version of SCons doesn't have any major functional
> bugs.
>
> As we did with python 2 when we dropped pre python 2.4, we announced for a
> while now that pre 2.7 will not be supported in future versions of scons.
>
> SCons 2.4 dropped pre 2.7 officially.
>
> Building python 2.7 is not terribly difficult to do on a centos/RHEL
> system.
> And I'd be willing to bet you can find a repo somewhere which has python
> 2.7.x pre-built for your distro if it is.
>
> As William said, the question for this thread is will supporting 2.7.4 and
> above only be a problem (as opposed to supporting 2.7.0->2.7.10 (and above).
>
> -Bill
>
> On Thu, Nov 19, 2015 at 12:23 PM, Ivan Van Laningham <ivanlan9 at gmail.com>
> wrote:
>
>> Hi All--
>> The trouble with requiring a minimum of 2.7.x on all platforms is that it
>> would be problematic for people on CentOS, Redhat and related distros
>> earlier than say, CentOS 7.  7 has 2.7, but 6 has 2.6 (and not the latest
>> version, either).  Anyone who wanted to use CentOS 6 would have to install
>> Python 2.7.x to use Scons.  Might not want to do it, or would go with an
>> earlier version.
>>
>> Metta,
>> Ivan
>>
>>
>> On Thu, Nov 19, 2015 at 1:10 PM, William Blevins <wblevins001 at gmail.com>
>> wrote:
>>
>>>
>>>
>>> On Thu, Nov 19, 2015 at 4:40 PM, Bill Deegan <bill at baddogconsulting.com>
>>> wrote:
>>>
>>>> William,
>>>>
>>>> The logic I was looking at is in src/engine/SCons/Platform/win32.py
>>>> Where env['SPAWN'] & env['PSPAWN'] are defined.
>>>>
>>>
>>> Yeah. It looks like all the funky Windows api calls and spawnve
>>> redefinition should be removable with 2.7 requirement.
>>>
>>>
>>>>
>>>> I missed seeing the file you reference, but indeed if we're at 2.7,
>>>> then this file should no longer be necessary?
>>>>
>>>> -Bill
>>>>
>>>> On Wed, Nov 18, 2015 at 2:00 PM, William Blevins <wblevins001 at gmail.com
>>>> > wrote:
>>>>
>>>>> If I understand correctly, the idea here is to move away from a custom
>>>>> Popen implementation in "src/engine/SCons/compat/_scons_subprocess.py" to
>>>>> using the Python subprocess implementation.
>>>>>
>>>>> Unless that file is no longer used and we are still generating a
>>>>> warning for no reason.
>>>>>
>>>>> On Wed, Nov 18, 2015 at 9:33 PM, Jason Kenny <dragon512 at live.com>
>>>>> wrote:
>>>>>
>>>>>> I am unclear on why this version. Part has only been using ctypes
>>>>>> since 2.6 for everything win32
>>>>>>
>>>>>> Why would this version of python be the needed. I would think
>>>>>> everything should be easy to switch.
>>>>>>
>>>>>> Jason
>>>>>>
>>>>>> ------------------------------
>>>>>> From: Bill Deegan <bill at baddogconsulting.com>
>>>>>> Sent: ‎11/‎18/‎2015 12:20 PM
>>>>>> To: SCons users mailing list <scons-users at scons.org>; SCons
>>>>>> developer list <scons-dev at scons.org>
>>>>>> Subject: [Scons-dev] Would requiring Python 2.7.4 or above be a
>>>>>> problem for future release?
>>>>>>
>>>>>> Greetings,
>>>>>>
>>>>>> To drop the requirement for pywin32, it may be necessary to require
>>>>>> python 2.7.4 or above.
>>>>>>
>>>>>> Will this cause anyone significant issues?
>>>>>>
>>>>>> _Bill
>>>>>>
>>>>>> _______________________________________________
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>>>>>>
>>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>>
>>>>
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>>>
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>>
>>
>> --
>> Ivan Van Laningham
>> God N Locomotive Works
>> http://www.pauahtun.org/
>>
>> http://www.python.org/workshops/1998-11/proceedings/papers/laningham/laningham.html
>> Army Signal Corps:  Cu Chi, Class of '70
>> Author:  Teach Yourself Python in 24 Hours
>>
>> _______________________________________________
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>>
>
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>


-- 
Ivan Van Laningham
God N Locomotive Works
http://www.pauahtun.org/
http://www.python.org/workshops/1998-11/proceedings/papers/laningham/laningham.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours
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