How to clear cache on building Gitlab?

Question

Gitlab can't clean my cache on building. How to fix this problem?

Executor: shell

Fetching changes...
warning: failed to remove config/__pycache__/__init__.cpython-36.pyc
warning: failed to remove config/settings/__pycache__/local.cpython-36.pyc
warning: failed to remove config/settings/__pycache__/__init__.cpython-36.pyc
warning: failed to remove config/settings/__pycache__/common.cpython-36.pyc
warning: failed to remove config/settings/__pycache__/test.cpython-36.pyc
warning: failed to remove docs/__pycache__/__init__.cpython-36.pyc

Answer 1

Luckily I was having the exact same issue as you (I think).

A little background:

I was using gitlab ci to build using a remote runner (shell) that would build a docker image and then run some tests.

Cause:

I was mounting a local directory inside the container by passing the -v flag to docker run (there are other ways to do this with compose yml for example).

Because the docker container runs as root the generated __pycache__ directories and files are owned by root on the local filesystem; This means that docker-runner does not have permission to delete them on the next build.

The solution:

Remove the mount and copy the files instead.

Answer 2

I workaround by not let python create *.pyc files

https://docs.python.org/3/using/cmdline.html#envvar-PYTHONDONTWRITEBYTECODE