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Diffstat (limited to 'nixpkgs/nixos/modules/system/boot/loader/external/external.md')
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diff --git a/nixpkgs/nixos/modules/system/boot/loader/external/external.md b/nixpkgs/nixos/modules/system/boot/loader/external/external.md new file mode 100644 index 000000000000..4f5b559dfc40 --- /dev/null +++ b/nixpkgs/nixos/modules/system/boot/loader/external/external.md @@ -0,0 +1,26 @@ +# External Bootloader Backends {#sec-bootloader-external} + +NixOS has support for several bootloader backends by default: systemd-boot, grub, uboot, etc. +The built-in bootloader backend support is generic and supports most use cases. +Some users may prefer to create advanced workflows around managing the bootloader and bootable entries. + +You can replace the built-in bootloader support with your own tooling using the "external" bootloader option. + +Imagine you have created a new package called FooBoot. +FooBoot provides a program at `${pkgs.fooboot}/bin/fooboot-install` which takes the system closure's path as its only argument and configures the system's bootloader. + +You can enable FooBoot like this: + +```nix +{ pkgs, ... }: { + boot.loader.external = { + enable = true; + installHook = "${pkgs.fooboot}/bin/fooboot-install"; + }; +} +``` + +## Developing Custom Bootloader Backends {#sec-bootloader-external-developing} + +Bootloaders should use [RFC-0125](https://github.com/NixOS/rfcs/pull/125)'s Bootspec format and synthesis tools to identify the key properties for bootable system generations. + |