How to get data out of a container?

[doronbehar]

I want to get a ZIP file of a directory found in a cntr container - a logs directory of a failing Nix Build. I tried:

sudo cntr attach -t command cntr-/nix/store/...-${name} -- zip -r - build/source/tests/_logs > tests_logs.zip

But it doesn't work - the ZIP file generated is a text file with the text:

zip error: Invalid command arguments (cannot write zip file to terminal)

[Mic92]

Can you not copy first and than zip it? Otherwise try to put a "bash -c 'zip ... | cat'" construct in place. Maybe cntr should not create a pseudo terminal if the output is not a terminal...

[doronbehar]

What do you mean by "put a bash -c 'zip ... | cat' construct in place"? Do you mean to use cntr exec? I'm not sure how to use it for this purpose...