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nixos/doc/rl: Add NixOS apply script

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Robert Hensing 2024-10-29 20:47:26 +01:00
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nixos/doc/manual/release-notes/rl-2411.section.md
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@ -50,6 +50,16 @@
If you experience any issues, please report them. If you experience any issues, please report them.
The original Perl script is deprecated and is planned for removal in the 25.05 release. It will remain accessible until then by setting `system.switch.enableNg` to `false`. The original Perl script is deprecated and is planned for removal in the 25.05 release. It will remain accessible until then by setting `system.switch.enableNg` to `false`.
- Built NixOS configurations now have a `$toplevel/bin/apply` script.
Unlike `switch-to-configuration`, it is capable of performing a complete `switch` operation.
If you call `switch-to-configuration` directly, you are recommended to use `apply` instead, and remove your call to `nix-env --profile /nix/var/nix/profiles/system --set $toplevel` or similar.
It will run the switch operation as a systemd unit if available, as `nixos-rebuild switch` would.
Benefits include:
- The `apply` script reduces the roundtrips required when performing a remote deployment with `nixos-rebuild switch --target-host HOST`.
- Developers and power users can now update NixOS in a single call.
- Alternative NixOS deployment methods have feature parity with `nixos-rebuild`, and NixOS can evolve all of its switching logic in one place.
- Support for mounting filesystems from block devices protected with [dm-verity](https://docs.kernel.org/admin-guide/device-mapper/verity.html) - Support for mounting filesystems from block devices protected with [dm-verity](https://docs.kernel.org/admin-guide/device-mapper/verity.html)
was added through the `boot.initrd.systemd.dmVerity` option. was added through the `boot.initrd.systemd.dmVerity` option.