Is there a way to add a comment on each nixos-rebuild, just like git?

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1

I’d like to have some comment to track what I did.

2

Something like this?

https://nixos.org/nixos/options.html#system.nixos.label

So, if you Git your configuration, and do rebuilds after commiting code, you can include

your local Git rev (or even partial Git commit message) to each boot entry.

3

That’s really cool~ Thanks~!

4

Those labels are nice, I have aliased “nixos-rebuild switch” to automatically sync with github at the same time, sharing commit messages/labels. The message also just defaults to some basic info pulled from “git status” if I’m too lazy to write one. You can definitely wrap your git-rev in there in a similar way to how I have it include commit info.

5

Even nicer would be if the label could be passed to nixos-rebuild, for folks like me who are mostly concerned about tagging what changes i made to the config.nix in each rebuild.

6

You can set it quickly using the “NIXOS_LABEL” and “NIXOS_LABEL_VERSION” environment variables rather than editing your config. This is how my scripts handle it.
I more or less added this to my a wrapper for rebuilding: export NIXOS_LABEL=$(git status | grep 'pull out some relevant lines...' ); nixos-rebuild switch

The options description provides a similar script suggestion
https://nixos.org/nixos/options.html#system.nixos.label

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7

That would be great - I’m looking at the grub list thinking when did I install that thing?