Prevent new node installs from downgrading packages

[adin00]

I'm not even sure if this can be done, I'm just throwing this out there.

First idea that comes to mind is a dry-run of sorts, and warn about any downgrade, with maybe a acontinue yes/no modal, and I would hapily skip that node until it is updated, or at all.
As it is at this rn, I can either check out the requirements of the repo and compare with current installation (very tedious) or just install it, see if/what it breaks, and take it from there.

Another idea is the ability to roll-back a faulty install. I've noticed that a backup of current nodes list is created before any node install, but I have no idea how to use that. furthermore, if the node dependencies prevents comfyui from running entirely, I'm pretty sure that json can't be used in any way.

I know that the same thing can be said about upgrading packages, but from my experience this case might break some other custom nodes, but never the host, which is much better from my perspective.

[ltdrdata]

1. I have also considered the yes/no modal option, but I am still deliberating on it. The issue is that I need to find a solution for cases where multiple packages are being installed, as this could lead to the modal appearing very frequently during a single installation process.

2. At present, the backup/restore functionality is limited as it only operates at the version level of custom nodes. I am considering implementing it at the pip package level.
   However, I am somewhat hesitant about this approach because it would require very extensive installation changes.
   I'm thinking of applying this in a way that allows it to be selectively applied during the restore dialog.