ci: Fix build of linux wheel requiring cmake<3.14

[jcfr]

Since starting with CMake 3.14, only manylinux2010 compatible wheels are
available, requiring any version of cmake ends building cmake from source
when installed from a manylinux1 system.

See scikit-build/cmake-python-distributions#76

[jcfr]

Duplicate of #115

[jokva]

Thank you. This is a good fix while we consider building manylinux2010 images instead.

[jcfr]

while we consider building manylinux2010 images instead.

An path forward could be to simplify the CI configuration and remove the dependency on multibuild. Similar to what was done with https://github.com/amueller/word_cloud
Let me know what you think or if you have questions.

In the mean time, I reported the following issues:

• cmake to keep support for building cmake using manylinux1 (see https://gitlab.kitware.com/cmake/cmake/issues/19311) Edit: restoring the support for building of newer cmake using manylinux1 will not happen. See this comment
• pip to ensure it find older wheel. See Failure to install manylinux1 wheel from manylinux1 docker image (Centos5) when a newer manylinux2010 wheel is available pypa/pip#6547

[jokva]

Does that mean that scikit-addons will provide a manylinux-compatible build environment on travis, circle or similar?

[jcfr]

Short answer: yes, scikit-ci-addons along with the manylinux dockcross images will simplify the overall CI pipeline.

Long answer:

In the case of word_cloud, the CI services are used like this:

• appveyor: windows wheels
• circleci: manylinux wheels
• travis: macos wheels

scikit-ci-addons provides few convenience scripts to help configure environment, in the context of dlisio, it could be helpful to:

• install python on travis using install-pyenv-py.
• (if desired) automatically upload the wheels associated with master as GitHub release associated with a tag called latest. This can be done using publish-github-release-py

All of that said, instead of appveyor (for windows wheels) and travis (for macos wheels), I suggest to improve further on what I setup for word_cloud and do the following:

• Azure-Pipelines for macos and windows wheel
• CircleCI for manylinux wheels as the docker integration of circleci is very nice.

At that time, Azure-Pipelines wasn't available.

the manylinux environment

scikit-ci-addons will provide a manylinux-compatible build environment on travis, circle

scikit-ci-addons is not related to manylinux, the official manylinux environment is available in the official docker image, that said I instead suggest to use the dockcross image dockcross/manylinux2010-x64 that already include ninja, cmake and scikit-build. Along with python 3.8 to test ahead of the upcoming stable release.

[jokva]

Alright, excellent, then we'll surely make plans to migrate.