CI system cryptic error

[Jon Turney]

On 20/01/2022 15:50, Hamish McIntyre-Bhatty wrote:
> Hi there,
> 
> Recently, I created a test package for python-imaging, and the CI system 
> gave a build error that I didn't see locally:
> 
> *** ERROR: unknown wheel filename.
> 
> This only occurred for the Python 3.8 build (3.6 and 3.7 are 
> unaffected). Considering some of the library name changes between these 
> versions, is it possible that this is a bug in the CI tool setup or in 
> cygport?

Weird.

I assume it's this job: 
https://github.com/cygwin/scallywag/actions/runs/1592256829

In which case further note it only failed with this error on i686, 
x86_64 seems to have built ok.  That might explain why you don't see it 
locally, at least, but it's still puzzling that there's a difference.

This error comes from here:

https://cygwin.com/git/?p=cygwin-apps/cygport.git;a=blob;f=cygclass/python-wheel.cygclass;h=90b0faac71eea6005401b4232e5b334bdc81b756;hb=HEAD#l190 


and means something more like "couldn't find the wheel file for python $ver"

I downloaded the builddir archive, and inspecting that it seems that a 
wheel for python3.8 (and 3.9!) isn't being generated.

> $ tar -tf builddir.tar.xz | grep whl
> python-imaging-8.4.0-1.i686/build/dist/Pillow-8.4.0-cp36-cp36m-cygwin_3_3_3_i686.whl
> python-imaging-8.4.0-1.i686/build/dist/Pillow-8.4.0-cp37-cp37m-cygwin_3_3_3_i686.whl

There seems to be completely different output between x86_64 and i686 
when building the python wheel, but I have no idea why!