Cartopy 0.15.1 fails to install on travis with no cython #1035
Description
Description
I added cartopy as an optional dependency to my pyresample package (switching from basemap to cartopy) and the installation failed on travis.
Downloading Cartopy-0.15.1.tar.gz (8.2MB)
100% |████████████████████████████████| 8.2MB 168kB/s
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "/tmp/pip-build-hkgucrv5/cartopy/setup.py", line 45, in <module>
from Cython.Distutils import build_ext
ModuleNotFoundError: No module named 'Cython'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/tmp/pip-build-hkgucrv5/cartopy/setup.py", line 47, in <module>
raise ImportError('Cython 0.15.1+ is required to install cartopy.')
ImportError: Cython 0.15.1+ is required to install cartopy.
Here's the entire job if you want it: https://travis-ci.org/pytroll/pyresample/jobs/344927488
I see this was addressed in #725 but doesn't seem to be working anymore.
I guess my main concern here is why is Cython needed by the user at installation time? Can't you either store the C/C++ files in the repository and therefore the source tarball or just include them in the built tarball. That way the Cython dependency shouldn't be needed.
Full environment definition
Operating system
Travis CI Image - Linux/Ubuntu
Cartopy version
0.15.1
conda list
See travis build above.
pip list
See travis build above.