[Ubuntu] MapServer Python MapScript and Wheels/Ubuntu Packages

[Seth G]

Thanks again for the reply. I guess the Python GDAL bindings are the closest to MapServer, the package at https://launchpad.net/~ubuntugis/+archive/ubuntu/ppa includes "usr\lib\python3\dist-packages\osgeo\_gdal.cpython-35m-x86_64-linux-gnu.so", so I guess is for Python 3.5 only? Is it possible to just support Python 3.6 (for example), and ignore other versions?

Shapely also has a couple of binaries e.g.  _speedups.cpython-36m-x86_64-linux-gnu.so (plus the GOES library it wraps around) but I think shapely is designed so these can be ignored if the binaries don't match the Python version. 

I'll be concentrating in the next few months on cleaning up Mapscript examples, getting test suites running on Python3 etc. so may repost here once this work is complete, and there may be more of a demand for a python3-mapscript. 

Ideally the aim would be to get a Python3 mapscript installation on OSGeoLive along with a Jupyter notebook of examples, so any suggestions on how best to achieve this are welcome (even if it is to continue with Python 2.7). 

Regards,

Seth

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twitter: @geographika

On Fri, Sep 21, 2018, at 10:59 AM, Sebastiaan Couwenberg wrote:
> On 9/21/18 9:22 AM, Seth G wrote:
> > By "use of wheels" I meant is it possible they can be used as the source of all files required for the installation e.g. the binaries would go to /lib and the examples and tests to /share. 
> 
> The python-mapscript package is built from the mapserver source package,
> not from the source dist on PyPI. Using the latter would make it much
> easier to build mapscript packages for all supported Python version in
> Debian. But then we risk that MapServer is updated before the Python
> bindings are, causing the Python binding to lag behind the other binding
> that are built from the mapserver source package.
> 
> > I can see how builds for every version of Python3 would be a pain. 
> > Looking at the shapely package at https://packages.ubuntu.com/en/bionic/python3-shapely - it contains binaries for just Python 3.6. Would limiting the Python version be possible on a repository such as ubuntugis-unstable? 
> 
> Shapely is not a good example. It's just a Python module, not a SWIG
> generated binding part of a larger project like MapServer.
> 
> > Apologies if the questions are fairly basic, but Linux distributions are new to me. Would https://wiki.debian.org/Python/LibraryStyleGuide be the best place to start reading? I'll also give manylinux another try. 
> 
> The Python packages on wiki.d.o are mostly applicable to pure Python
> modules, not so much to SWIG generated bindings for C libraries.
> 
> If there is sufficient demand for a python3-mapscript package I willing
> to look at updating the mapserver source package to also build that. But
> as I'm not a fan of having to rebuild mapserver for multiple language
> versions, I'm not going to do that without sufficient user demand.
> 
> Kind Regards,
> 
> Bas
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