-c option to clean up image before shrinking

[harbaum]

The -c option is intended to remove private information as well as cached data from the image. It's intended to be used when using the image on a different pi or when distributing the image.

[dalmago]

Doesn't the regenerate_ssh_host_keys.service file already exist on the system? Couldn't you use it instead?

[harbaum]

It exists after installation but is deleted once it has been run to prevent it from running again. Thus i don't need any extra magic to run my script. Once i restore it it's run automatically by the system on next boot.

[dalmago]

My system still has the script under /lib/systemd/system/ even though it was run already.

When I enable it with systemctl, Raspbian creates a symbolic link to /etc/systemd/system/multi-user.target.wants/. After the script ran, it calls systemctl disable to delete the symlink, but the script remains on disk.

[harbaum]

Hmm. Maybe that changed one day. If it was the link that was missing then my approach wouldn't work at all. Bit it did ... so i guess i should check for the script and the link and should restore whatever is missing.

[graywolf336]

Just to add my two cents, I just verified that the regenerate_ssh_host_keys.service does not exist on the Raspbian 10 (buster). So, this would be a nice addition to the script. :)

[kindofausername]

I would like to see this option!

[Drewsif]

Im going to consider this out of scope. Any attempts to clean up images has resulted in unintended errors for users. See #256 for more details