[jira] [Commented] (QPID-8413) Python3 support in build scripts

["Rick van Rein (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/QPID-8413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17289519#comment-17289519 ] 

Rick van Rein commented on QPID-8413:
-------------------------------------

Hi Jiri,


Thanks very much!

This is an awkward idea -- taking a secure hash over a non-deterministic
structure.  No surprise that it causes problems.

I've been intruiged by the lack of functionality in secure hashes for
long.  Sometimes I solve it locally with helper fun like
https://gitlab.com/arpa2/libarpa2common/-/blob/v2_id_acl/include/arpa2/digest.h
and I've been mesmerising about properly hashing general structures
including dictionaries and (multi)sets, but that's of no use to you
here.  Shrugging is probably good enough for now :)

Thanks for help to move away from Python2 !

-Rick


> Python3 support in build scripts
> --------------------------------
>
>                 Key: QPID-8413
>                 URL: https://issues.apache.org/jira/browse/QPID-8413
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Broker
>    Affects Versions: qpid-cpp-1.40.0
>         Environment: Docker build environment for Qpid,
> [https://github.com/arpa2/docker-demo/tree/11429b52b9419c7f49367abe648b3bc67613bdba/build-qpid]
> Imports gcc/g++ and Python3 from Debian stable in binary layers.  Builds proton but not qpid-cpp-broker.
> You are welcome to "docker build ." in this directory and see it fail.  It uses qpid-cpp-broker as a git checkout from master so you can even work in there :)
>            Reporter: Rick van Rein
>            Priority: Major
>              Labels: Python3, build-failure, cmake
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> Python 2.7 is soon loosing support and as a result we gradually abandoned it in the 2nd half of 2019.  We have certainly not been early adopters!
> Now, building Qpid from source, I find that it still relies on this old version.  It does not even notice though, which is not very handy in a time that people are migrating:
>  
> {\{-- Found PythonInterp: /usr/bin/python (found suitable version "3.7.3", minimum required is "2.7") }}
>  \{{-- Found PythonInterp: /usr/bin/python (found version "3.7.3") }}
>  \{{ File "<string>", line 1}}
>  {{ from distutils.sysconfig import get_python_lib; print get_python_lib(False, prefix='/usr/local').replace('
> ', '/')}}
>  \{{ ^}}
>  {{SyntaxError: invalid syntax}}
>  {{CMake Error at managementgen/CMakeLists.txt:34 (install):}}
>  \{{ install DIRECTORY given no DESTINATION!}}
>  
> Python3 bails out with an error, about the lack of parenthesis, but CMake concludes its own things.  Looking silly.  It does continue to one more similar error:
>  
> {{-- Regenerating Qpid Management Framework sources}}
>  \{{ File "/usr/local/src/qpid-cpp-broker.git/managementgen/qmf-gen", line 64}}
>  \{{ print "no input files"}}
>  \{{ ^}}
>  {{SyntaxError: Missing parentheses in call to 'print'. Did you mean print("no input files")?}}
>  {{CMake Error at src/CMakeLists.txt:141 (include):}}
>  \{{ include could not find load file:}}{{/usr/local/src/qpid-cpp-broker.git/build/src/managementgen.cmake}}
>  {{CMake Error at /usr/share/cmake-3.13/Modules/FindBoost.cmake:2100 (message):}}
>  \{{ Unable to find the requested Boost libraries.}}{{Unable to find the Boost header files. Please set BOOST_ROOT to the root}}
>  \{{ directory containing Boost or BOOST_INCLUDEDIR to the directory containing}}
>  \{{ Boost's headers.}}
>  {{Call Stack (most recent call first):}}
>  \{{ src/CMakeLists.txt:194 (find_package)}}
>  {{CMake Error at /usr/share/cmake-3.13/Modules/FindBoost.cmake:2100 (message):}}
>  \{{ Unable to find the requested Boost libraries.}}{{Unable to find the Boost header files. Please set BOOST_ROOT to the root}}
>  \{{ directory containing Boost or BOOST_INCLUDEDIR to the directory containing}}
>  \{{ Boost's headers.}}
>  {{Call Stack (most recent call first):}}
>  \{{ src/CMakeLists.txt:208 (find_package)}}
>  {{CMake Error at src/CMakeLists.txt:210 (message):}}
>  \{{ Required Boost C++ libraries not found. Please install or try setting}}
>  \{{ BOOST_ROOT}}
>  {{-- Configuring incomplete, errors occurred!}}
>  
> Again, the parenthesis of print.  And again, CMake concludes its own things, presumably from the exit value.
>  
> I don't believe I am being a Python3 pusher at this time, not anymore; last year it has been anounced that Python2.7 would be gone at the start of 2020.  (I checked again and found it is now set at [April 2020|http://pyfound.blogspot.com/2019/12/python-2-sunset.html[],] but still very soon.)
> Please update Qpid accordingly, so people relying on Python3 for security/updates have a way to continue using/building Qpid?  By now, everyone should at least be able to run Python3, or else that is a fair upgrade expectation, as it will soon be the only real Python left.
>  
> Thanks!
>  -Rick



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