debsums: changed file /lib/netplan/00-network-manager-all.yaml (from ubuntu-settings package)

[Kai-Chuan Hsieh]

On ubuntu desktop 24.04 image, run the operations below

1. $ nmcli d wifi connect <SSID> password <password>
2. $ nmcli c delete <SSID>
3. $ sudo debsums -s

Then the error is happened debsums: changed file /lib/netplan/00-network-manager-all.yaml (from ubuntu-settings package)

it seems the netplan update the file belonged to ubuntu-settings that cause the debsums failed.
---
ProblemType: Bug
ApportVersion: 2.28.1-0ubuntu3.1
Architecture: amd64
CasperMD5CheckMismatches: ./casper/initrd ./casper/vmlinuz ./casper/minimal.standard.live.hotfix.squashfs ./casper/minimal.standard.hotfix.squashfs ./casper/minimal.hotfix.squashfs ./boot/grub/grub.cfg
CasperMD5CheckResult: fail
DistributionChannelDescriptor:
 # This is the distribution channel descriptor for Ubuntu 24.04 for Dell
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-noble-oem-24.04a-next-20240902-67
DistroRelease: Ubuntu 24.04
InstallationDate: Installed on 2024-09-02 (1 days ago)
InstallationMedia: Ubuntu OEM 24.04.1 LTS "Noble Numbat" - Release amd64 (20240829)
Package: netplan.io 1.0.1-1ubuntu2~24.04.1
PackageArchitecture: amd64
ProcVersionSignature: User Name 6.8.0-1012.12-oem 6.8.12
Tags: noble
Uname: Linux 6.8.0-1012-oem x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lxd sudo
_MarkForUpload: True

[Kai-Chuan Hsieh (kchsieh)]

apport information

[Kai-Chuan Hsieh (kchsieh)]

apport information

[Kai-Chuan Hsieh (kchsieh)]

apport information

[Danilo Egea Gondolfo (danilogondolfo)]

There is a comment in the first line of /lib/netplan/00-network-manager-all.yaml.

We seem to be dropping it when we call update_yaml_hierarchy() (I guess) and the file is updated.

I think we have an LP bug about preserving comments...

A workaround would consist in shipping the file without the comment.

Here is a simpler reproducer:

root@noble-desktop:~# nmcli con add type dummy ifname dummy0
Connection 'dummy-dummy0' (7ba86ef2-0b18-447e-ae63-eebb08aec9c1) successfully added.

root@noble-desktop:~# cat /lib/netplan/00-network-manager-all.yaml
# there is a comment here
network:
  version: 2
  renderer: NetworkManager

root@noble-desktop:~# nmcli con del dummy-dummy0
Connection 'dummy-dummy0' (7ba86ef2-0b18-447e-ae63-eebb08aec9c1) successfully deleted.

root@noble-desktop:~# cat /lib/netplan/00-network-manager-all.yaml
network:
  version: 2
  renderer: NetworkManager