Only delete zipapps cache on the main process

[Joshix-1]

With multiprocessing only the main process should delete the cache. Otherwise exceptions get thrown on exit. Silently ignoring exceptions would not work, as then when a single child dies the files would be gone.

[ClericPy]

how to test this change？

[Joshix-1]

create a zipapp with code like the following:

import os
os.fork()
print(os.getpid())

[ClericPy]

https://github.com/ClericPy/zipapps/blob/master/test_utils.py

What I mean is that there is a test case that can run successfully on different operating systems to verify that changes are valid and scenarios are explained

Which is to prove the value of the change, and regression testing to avoid side effects.

[ClericPy]

By the way, zipapps are actually not recommended to remove themselves after taking over the run. It's not as safe as an external program, which is not a very regular feature in itself.

[Joshix-1]

What I mean is that there is a test case that can run successfully on different operating systems to verify that changes are valid and scenarios are explained

I'll try to write a test

By the way, zipapps are actually not recommended to remove themselves after taking over the run. It's not as safe as an external program, which is not a very regular feature in itself.

This is about removing the files from the cache. E.g. the .so files of dependencies that get extracted.

[Joshix-1]

Added a test. Sadly I don't know how to test on windows, as os.fork is not available there.