Develop spacemacs function to update spacemacs

[punassuming]

For people following a certain branch, we need a function that will update spacemacs, this should both update the repo to the latest checkout, but also update all extension level submodules.

Perhaps also integrate this in startup, so in addition to adding packages, we also update submodules. The latest switch for nerd-commenter as an extension was missed in my setup when I just did a git pull

[syl20bnr]

Indeed the last update broke the setup of several users and there is no documentation about how to update spacemacs.

Your proposal is a good fit to add to the *spacemacs* buffer like this:

SPACEMACS WELCOME
loading...............ready!

[U] update spacemacs
[R] restore previous session
...

[punassuming]

Any way we can integrate this idea into the new buttons we have on the start page? I can work on the actual update commands (update packages, submodule update), but would need someone else to work with the UI.

[syl20bnr]

👍

I will work on the UI.

[syl20bnr]

We have Update of the packages. Update of spacemacs repo is on the way.
I close this since the function is here but need improvements.