apt-btrfs-snapshot crashes without any arguments

[Andrew Stubbs]

The failure looks like this:

$ sudo apt-btrfs-snapshot
Traceback (most recent call last):
  File "/usr/bin/apt-btrfs-snapshot", line 98, in <module>
    if args.command == "supported":
AttributeError: 'Namespace' object has no attribute 'command'

Adding a command or --help works fine, but this isn't what you'd call "graceful failure".

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Jonathan (jjcf89)]

 $ diff /usr/bin/apt-btrfs-snapshot.orig /usr/bin/apt-btrfs-snapshot
98c98,101
< if args.command == "supported":
---
> if "command" not in args:
> parser.print_help()
> res = False
> elif args.command == "supported":

[Rolf Leggewie (r0lf)]

Still unresolved in bionic

[flrnd (flrnd)]

Same in focal.

This happened after a revert.

When you revert you loose all the previous snapshots, I was about to file a bug but then had a second problem.

When you rollback from snapper (which doesn't work either because how the Ubuntu subvolumen layout works) apt-btrfs-snapshot stops working and throw you that error.

Thankfully I tested this on a virtual machine before going to production because I was really skeptic about it. And I was right.

It's clear that after so many years this is not going to be fixed, at least please put a big huge warning to people wanting to use both snapper and apt-btrfs-snapshot with known issues.

[Mathias Rangger (masteroforion)]

This is still an issue today.
The fix seems already be there. Why is it not resolved?