[WSL datasource] Error when .cloud-init directory is empty

[jibel]

Bug report

This is specific to the WSL datasource.

When the .cloud-init directory exists on the Windows host but is empty or contains configuration files that do no apply to any WSL instance, the following error message is displayed:

> ubuntu2404.exe
Installing, this may take a few minutes...
Checking for initialization tasks...


status: done
WARNING: initialization tasks partially succeeded, see below:
status: done
extended_status: degraded done
boot_status_code: enabled-by-generator
last_update: Thu, 01 Jan 1970 05:13:58 +0000
detail: DataSourceWSL
errors: []
recoverable_errors:
ERROR:
        - Unable to load any user-data file in /mnt/c/Users/jean-/.cloud-init: /mnt/c/Users/jean-/.cloud-init directory is empty
        - Unable to load any user-data file in /mnt/c/Users/jean-/.cloud-init: /mnt/c/Users/jean-/.cloud-init directory is empty
        - Unable to load any user-data file in /mnt/c/Users/jean-/.cloud-init: /mnt/c/Users/jean-/.cloud-init directory is empty
        - Unable to load any user-data file in /mnt/c/Users/jean-/.cloud-init: /mnt/c/Users/jean-/.cloud-init directory is empty
Please create a default UNIX user account. The username does not need to match your Windows username.
For more information visit: https://aka.ms/wslusers
Enter new UNIX username: u
New password:
Retype new password:
passwd: password updated successfully
Installation successful!

The expectation is that this situation should not be considered as an error.

Steps to reproduce the problem

1. On a Windows machine with WSL, create a directoy %USERPROFILE%/.cloud-init/ and keep it empty

mkdir "$env:USERPROFILE\.cloud-init"

3. Install Ubuntu 24.04 LTS in WSL:

ubuntu2404.exe

4. Proceed with the installation

Environment details

• Cloud-init version: 99.daily-202408162034-56aa70636~ubuntu24.04.1
• Operating System Distribution: Ubuntu 24.04 LTS
• Cloud provider, platform or installer type: WSL

WSL version: 2.3.14.0
Kernel version: 6.6.36.3-1
WSLg version: 1.0.64
MSRDC version: 1.2.5326
Direct3D version: 1.611.1-81528511
DXCore version: 10.0.26100.1-240331-1435.ge-release
Windows version: 10.0.22631.4037

cloud-init logs

cloud-init.logs.tar.gz

[aciba90]

Tracking in SC-1862.