Matplotlib.font_manager fails to find WINDIR environment variable

Environments Windows
1

Hi,

I’m trying to set up a Travis CI Windows build for Pyunicorn. Everything runs fine when using macOS or Linux, but there’s a Problem with the WINDIR environment variable on the Windows build.

My .travis.yml boils down to:


os: windows
language: shell
env: PATH=/c/Python311:/c/Python311/Scripts:$PATH

before_install:
    - choco install python --version 3.11.6
    - python -m pip install --upgrade pip

install:
    # install my package
    - travis_retry pip install -v -e ".[testing,docs]"

script:
    # run tests via tox
    - tox -v

but when running the test suite via tox, matplotlib won’t find the WINDIR environment variable (see build log), although I tried adding an echo $WINDIR right before running tox and it returned C:\Windows as it should.

The same happens when I use a conda environment in the build (see this build log)

Can anyone come up with an idea on what could cause this?

Cheers, Fritz

2

Resolved:

When using tox, the WINDIR environment variable needs to be passed to the tox environment. This can be done by adding a

passenv = WINDIR

into your tox.ini or whatever config file you are using.