[Scons-users] "pip install scons" result in a broken installation that is unusable

Bill Deegan bill at baddogconsulting.com
Fri Oct 12 10:02:27 EDT 2018 

Here's what I'm seeing:

~/stow/python-2.7.14/bin/pip install --index-url
https://test.pypi.org/simple/ scons==3.1.0.alpha.20181011
Looking in indexes: https://test.pypi.org/simple/
Collecting scons==3.1.0.alpha.20181011
Installing collected packages: scons
Successfully installed scons-3.1.0a20181011
bdeegan at kufra1:~/devel/scons/tmp$ scons -c
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Cleaning targets ...
scons: done cleaning targets.

This is on a python 2.7.14 I build from scratch on an ubuntu 16.04.5 LTS
system.

Try pip uninstall scons
check that the scons files are gone from /cluster/apps/python/2.7.14
/lib/python2.7/site-packages/scons*

Then try reinstalling.


On Fri, Oct 12, 2018 at 9:47 AM Bill Deegan <bill at baddogconsulting.com>
wrote:

> Do you have wheel installed?
> I don't see this problem on a vanilla python 2.7.14 install with a pip
> install (no virtualenv) into that tree..
> Are you sure you're picking up scons from that path?
> can you paste the output of 'which scons' ?
>
>
> On Fri, Oct 12, 2018 at 1:39 AM Fux Samuel (ID SIS) <samuel.fux at id.ethz.ch>
> wrote:
>
>> Dear Bill,
>>
>> Thank you for your reply.
>>
>> For me it still fails:
>>
>> [sfux at lo-login-01 ~]$ pip install --index-url
>> https://test.pypi.org/simple/ scons==3.1.0.alpha.20181011
>> Looking in indexes: https://test.pypi.org/simple/
>> Collecting scons==3.1.0.alpha.20181011
>> Installing collected packages: scons
>> Successfully installed scons-3.1.0a20181011
>> [sfux at lo-login-01 ~]$ scons
>> SCons import failed. Unable to find engine files in:
>>   /cluster/apps/python/2.7.14/bin/../engine
>>   /cluster/apps/python/2.7.14/bin/scons-local-3.1.0.alpha.20181011
>>   /cluster/apps/python/2.7.14/bin/scons-local
>>
>> /cluster/apps/python/2.7.14/lib64/python2.7/site-packages/lib/scons-3.1.0.alpha.20181011
>>   /cluster/apps/python/2.7.14/lib/scons-3.1.0.alpha.20181011
>>   /cluster/apps/python/2.7.14/lib/scons-3.1.0.alpha.20181011
>>
>> /cluster/apps/python/2.7.14/lib64/python2.7/site-packages/lib/python2.7/site-packages/scons-3.1.0.alpha.20181011
>>
>> /cluster/apps/python/2.7.14/lib/python2.7/site-packages/scons-3.1.0.alpha.20181011
>>
>> /cluster/apps/python/2.7.14/lib/python2.7/site-packages/scons-3.1.0.alpha.20181011
>>   /cluster/apps/python/2.7.14/lib64/scons-3.1.0.alpha.20181011
>>   /cluster/apps/python/2.7.14/lib64/python2.7/site-packages/lib/scons
>>   /cluster/apps/python/2.7.14/lib/scons
>>   /cluster/apps/python/2.7.14/lib/scons
>>
>> /cluster/apps/python/2.7.14/lib64/python2.7/site-packages/lib/python2.7/site-packages/scons
>>   /cluster/apps/python/2.7.14/lib/python2.7/site-packages/scons
>>   /cluster/apps/python/2.7.14/lib/python2.7/site-packages/scons
>>   /cluster/apps/python/2.7.14/lib64/scons
>> Traceback (most recent call last):
>>   File "/cluster/apps/python/2.7.14/bin/scons", line 192, in <module>
>>     import SCons.Script
>> ImportError: No module named SCons.Script
>> [sfux at lo-login-01 ~]$
>>
>>
>> Not using virtualenv is a personal preference, like not using Anaconda to
>> install Python itself or like preferring pip over distutils. I don't like
>> the additional step of activating the virtualenv because I would like to
>> keep things as simple as possible for our cluster users.
>>
>> If virtualenv is a hard requirement for using SCons, then this should be
>> added to the Readme.md file on github. Currently the Readme.md file states
>> with regards to dependencies:
>>
>> Execution Requirements
>>
>> Running SCons requires Python version 2.7.* and Python 3.5 or higher.
>> There should be no other dependencies or requirements to run SCons.
>> Installation Requirements
>>
>> Nothing special.
>>
>>
>> Best regards
>>
>> Sam
>>
>> --
>> ETH Zurich, Dr. sc. ETH Samuel Fux
>> High Performance Computing, Scientific IT Services
>> WEC D 13, Weinbergstrasse 11, 8092 Zurich, Switzerland
>> Phone +41 44 632 57 63, http://www.id.ethz.ch/
>> samuel.fux at id.ethz.ch
>> ------------------------------
>> *Von:* Scons-users [scons-users-bounces at scons.org]" im Auftrag von "Bill
>> Deegan [bill at baddogconsulting.com]
>> *Gesendet:* Donnerstag, 11. Oktober 2018 19:45
>> *An:* SCons users mailing list
>> *Betreff:* Re: [Scons-users] "pip install scons" result in a broken
>> installation that is unusable
>>
>> This issue is resolved by patch merged into master in may.
>> https://github.com/SCons/scons/pull/3134
>>
>> You can try via package I just uploaded to testpypi
>> pip install --index-url https://test.pypi.org/simple/
>> scons==3.1.0.alpha.20181011
>>
>> Please let me know if this works for you.
>> I tried in a freshly built python on my linux system.
>> Seems to work for me.
>>
>> -Bill
>>
>>
>>
>> On Thu, Oct 11, 2018 at 1:37 PM Mats Wichmann <mats at wichmann.us> wrote:
>>
>>> On 10/11/2018 10:37 AM, Mats Wichmann wrote:
>>> > On 10/11/2018 10:19 AM, Bill Deegan wrote:
>>> >> It should work with recent pip.
>>> >> Let me take a look today.
>>> >> -Bill
>>> >
>>> > IMO, some of the paths are ready as they are and should not be joined
>>> > with further bits. a little reorg is needed there.
>>>
>>> to be a little less cryptic, it seems that the very first place a path
>>> could be added to prefs is here:
>>>
>>> # - running from egg check
>>> try:
>>>     import pkg_resources
>>> except ImportError:
>>>     pass
>>> else:
>>>     # when running from an egg add the egg's directory
>>>     try:
>>>         d = pkg_resources.get_distribution('scons')
>>>     except pkg_resources.DistributionNotFound:
>>>         pass
>>>     else:
>>>         prefs.append(d.location)
>>>
>>> This stanza succeeds on all kinds of installations, "running from egg"
>>> does not seem precise; whatever get_distribution looks for is found both
>>> in Linux distro packages and pip installed locations.  This gives you
>>> back a path that does not want 'lib' or 'lib/pythonX.Y/site-packages'
>>> appended. For example for a particular virtualenv that has pip-install'd
>>> scons, that stanza yields:
>>>
>>> /home/mats/.virtualenvs/py27+scons/lib/python2.7
>>>
>>> Further down, after the appending that happens in the two list
>>> comprehensions to all the paths in prefs, that expanded to these two:
>>>
>>> /home/mats/.virtualenvs/py27+scons/lib/python2.7/site-packages/lib
>>>
>>> /home/mats/.virtualenvs/py27+scons/lib/python2.7/site-packages/lib/python2.7/site-packages
>>>
>>> which are throwaways, engine will never be found in those after they are
>>> expanded to these four locations on the final round:
>>>
>>>
>>> /home/mats/.virtualenvs/py27+scons/lib/python2.7/site-packages/lib/scons-3.0.1
>>>
>>> /home/mats/.virtualenvs/py27+scons/lib/python2.7/site-packages/lib/python2.7/site-packages/scons-3.0.1
>>> /home/mats/.virtualenvs/py27+scons/lib/python2.7/site-packages/lib/scons
>>>
>>> /home/mats/.virtualenvs/py27+scons/lib/python2.7/site-packages/lib/python2.7/site-packages/scons
>>>
>>> there is no site-packages/lib and definitely no
>>> site-packages/lib/.../site-packages - really this is the problem Samuel
>>> is seeing.
>>>
>>> What we really wanted to generate from that original first path was:
>>>
>>>
>>> /home/mats/.virtualenvs/py27+scons/lib/python2.7/site-packages/scons-3.0.1
>>> /home/mats/.virtualenvs/py27+scons/lib/python2.7/site-packages/scons
>>>
>>> _______________________________________________
>>> Scons-users mailing list
>>> Scons-users at scons.org
>>> https://pairlist4.pair.net/mailman/listinfo/scons-users
>>>
>> _______________________________________________
>> Scons-users mailing list
>> Scons-users at scons.org
>> https://pairlist4.pair.net/mailman/listinfo/scons-users
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://pairlist4.pair.net/pipermail/scons-users/attachments/20181012/f7f3a7eb/attachment.html>

More information about the Scons-users mailing list