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Move deployment section from dev docs to README, add warning

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h7x4
2026-01-13 22:54:21 +09:00
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docs/development.md
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@@ -156,27 +156,6 @@ nix build .#
> built some of the machines recently. Be prepared to wait for up to an hour to build all machines from scratch
> if this is the first time.
### Deploying to machines
> [!WARNING]
> Be careful to think about state when testing changes against the machines. Sometimes, a certain change
> can lead to irreversible changes to the data stored on the machine. An example would be a set of database
> migrations applied when testing a newer version of a service. Unless that service also comes with downwards
> migrations, you can not go back to the previous version without losing data.
To deploy the changes to a machine, you should first SSH into the machine, and clone the pvv-nixos-config
repository unless you have already done so. After that, checkout the branch you want to deploy from, and rebuild:
```bash
# Run this while in the pvv-nixos-config directory
sudo nixos-rebuild switch --update-input nixpkgs --update-input nixpkgs-unstable --no-write-lock-file --refresh --flake .# --upgrade
```
This will rebuild the NixOS system on the current branch and switch the system configuration to reflect the new changes.
Note that unless you eventually merge the current changes into `main`, the machine will rebuild itself automatically and
revert the changes on the next nightly rebuild (tends to happen when everybody is asleep).
### Forcefully reset to `main`
If you ever want to reset a machine to the `main` branch, you can do so by running: