Installing tixi3 in python environment within GitLab pipeline

[danieljuschus]

I need to run code which requires tixi in a GitLab pipeline. I would rather not use a conda environment in that pipeline. I'm installing tixi in the pipeline as described here for Ubuntu: https://software.opensuse.org/download.html?project=science:dlr&package=tixi3

However, the python env inside the container cannot find the tixi library. I have gone through a lot of iteration with ChatGPT, but nothing has worked so far. Its first suggestion was to run pip install tixi3 after having installed through apt-get. Next, it told me to build it manually within the pipeline with cmake, and then to run python3 make_tixi_python.py. None of this has worked so far. How can I achieve this?

Note that https://github.com/DLR-SC/tixi/issues/179 would be an alternative solution to this.