Where to generate env_vars.sh on the fly?

[madig]

I'm trying to build wheels for freetype-py. What's peculiar about the project is that it does not build an extension, but a plain .so/.dll/.dylib that is accessed through Python's FFI library if available, otherwise the system-provided library is accessed. The setup.py file is set up to look for the presence of the environment variable FREETYPEPY_BUNDLE_FT to decide whether to build an unbundled universal wheel or a bundled platform-specific one. Now, the env var needs to reach the container somehow in Linux (Windows and macOS build correctly), but of course only when I want to bundle a lib. See https://github.com/madig/freetype-py/blob/fix-ci-build/.travis.yml for what I'm doing.

Generating an env_vars.sh in before_install or script doesn't seem work... where to best do it? Or do you have a better idea?

script:
    - if [ $FREETYPEPY_BUNDLE_FT ]; then echo "Bundling FreeType"; echo "FREETYPEPY_BUNDLE_FT=1" > env_vars.sh; else echo "Not bundling FreeType."; fi
    - install_run $PLAT

[anthrotype]

@madig there are two docker images, one for build (for manylinux1 running CentOS 5) and one for test runs (Ubuntu Trusty).
Currently env_vars.sh is only sourced from the build phase. I'm proposing to source it also from the install-and-test phase with #198.

If you generate the env_vars.sh file just before calling install_run then it is too late for it to reach the manylinux docker. The ENV_VARS_PATH has already been (unsuccessfully) sourced by then, from inside docker_build_wrap.sh, which is called by build_multilinux function, in turn called by build_wheel. So to ensure it reaches the manylinux docker where the wheel is built, you need to create env_vars.sh before calling build_wheel. The before_install phase of Travis pipeline would be good place.

[native-api]

before_install is the fn that ultimately causes this file to be sourced.

So you need to generate env_vars.sh in travis.yml, before you call that function.

[mattip]

The OP has not responded to the suggestion, I hope they have solved the problem. I see the repo has moved to using cibuildwheel. Closing.