Postinst script for dpkg package does not work in chroot'ed environment

[fiesh]

This is a dup of signalapp/Signal-Desktop#7146 which I brought up in the wrong repository.

We use a chroot environment to maintain our diskless clients' boot images. The postinst script has a call

apparmor_parser --replace --write-cache --skip-read-cache "$APPARMOR_PROFILE_TARGET"

which one doesn't want to have in a chroot environment, and it fails for us. This means I typically remove the call from the postinst file manually.

Changing packages/app-builder-lib/templates/linux/after-install.tpl's problematic line to

if ! { [ -x '/usr/bin/ischroot' ] && ischroot; } && hash apparmor_parser 2>/dev/null; then

fixes the issue for me.

[mmaietta]

Would you mind opening a PR for that change? This is the first I've seen of this error, but it seems reasonable of a change.

Also not sure how to test this locally as well. Can you provide instructions for doing this in a VM?

[fiesh]

Would you mind opening a PR for that change? This is the first I've seen of this error, but it seems reasonable of a change.

Thanks, yes, I'll do that. Wanted to wait for feedback first.

Also not sure how to test this locally as well. Can you provide instructions for doing this in a VM?

Do the instructions from signalapp/Signal-Desktop#7146 help or suffice?