`extra-container destroy` has no effect?

[bjornfor]

$ extra-container list
demo
$ extra-container destroy demo
$ extra-container list
demo                                   <---- still here!?
$ extra-container destroy --all
$ extra-container list
demo                                   <---- still here!?

Either I'm misunderstanding the purpose of destroy or it's a bug :-) (I thought it'd stop the containers and wipe /var/lib/nixos-containers/NAME.)

Using latest extra-container version (0.10).

[erikarvstedt]

I can't reproduce this, neither locally, nor by running your example in the reference VM (via nix run github:erikarvstedt/extra-container#vm). What's your system environment? Do you use NixOS? If yes, what's your NixOS version and system.stateVersion?

[bjornfor]

This is on Ubuntu 18.04. Thanks for checking. I'll try to debug this from my side then.

[bjornfor]

With set -x debugging I found that it was PEBKAC:

• A long time ago I configured extra-container (at commit 66c8c3d4480e9cb076a966cd7b71fc672f0dfbb6) in my env, which I deployed to a few machines. I ended up not really using it back then and forgot that I had it (inside some home-manager modules).
• Fast forward 1+ years and I set up a new repo with a shell.nix using modern extra-container.
• Things work fine and I start deploying to remote machines, not realizing that on the remote machines I'm actually using the old extra-container and not the one in my shell.nix file. (Technically the deploy script was correct, but I started running extra-container outside of the shell.nix file on the remote machine -- big mistake -- inadvertantly using an old version!)
• The old extra-container version hardcodes /etc/container path, whereas the modern one detects /etc/nixos-containers (when applicable). Thus the old version doesn't see the containers and silently aborts extra-container destroy.

So yeah... completely PEBKAC!

Sorry for the noise and thank you for creating extra-container! I'm really exited to have access to declarative NixOS on impure Ubuntu!