From c436983153438a8ea12d848facee2ce9498d42f2 Mon Sep 17 00:00:00 2001 From: Jeeves Date: Thu, 28 Nov 2024 08:36:58 -0700 Subject: [PATCH] add nixos module --- base.nix | 43 ++++++++++++++++- flake.nix | 6 +++ nixos/default.nix | 119 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 166 insertions(+), 2 deletions(-) create mode 100644 nixos/default.nix diff --git a/base.nix b/base.nix index 5820bb6..abd4c2d 100644 --- a/base.nix +++ b/base.nix @@ -1,4 +1,4 @@ -{ config, pkgs, modulesPath, ... }: { +{ config, pkgs, lib, modulesPath, ... }: { fileSystems = { "/boot" = { device = "/dev/disk/by-label/nixos-boot"; @@ -16,11 +16,50 @@ system.build.rootFileSystem = pkgs.callPackage (modulesPath + "/../lib/make-ext4-fs.nix") { storePaths = with pkgs; [ config.system.build.toplevel - busybox ]; volumeLabel = "nixos-root"; + populateImageCommands = '' + cp ${config.system.build.toplevel}/init ./files/init + touch ./files/firstboot + ''; }; + # from https://github.com/NixOS/nixpkgs/blob/e405f30513169feedb64b5c25e7b00242010af58/nixos/modules/installer/sd-card/sd-image.nix#L267 + boot.postBootCommands = let + expandOnBoot = '' + # Figure out device names for the boot device and root filesystem. + rootPart=$(${pkgs.util-linux}/bin/findmnt -n -o SOURCE /) + bootDevice=$(lsblk -npo PKNAME $rootPart) + partNum=$(lsblk -npo MAJ:MIN $rootPart | ${pkgs.gawk}/bin/awk -F: '{print $2}') + + # Resize the root partition and the filesystem to fit the disk + echo ",+," | sfdisk -N$partNum --no-reread $bootDevice + ${pkgs.parted}/bin/partprobe + ${pkgs.e2fsprogs}/bin/resize2fs $rootPart + ''; + firstbootFile = "/firstboot"; + in '' + # On the first boot do some maintenance tasks + if [ -f ${firstbootFile} ]; then + set -euo pipefail + set -x + + ${expandOnBoot} + + # TODO what does all this do? + + # Register the contents of the initial Nix store + # ${config.nix.package.out}/bin/nix-store --load-db < ${firstbootFile} + + # nixos-rebuild also requires a "system" profile and an /etc/NIXOS tag. + # touch /etc/NIXOS + # ${config.nix.package.out}/bin/nix-env -p /nix/var/nix/profiles/system --set /run/current-system + + # Prevents this from running on later boots. + rm -f ${firstbootFile} + fi + ''; + # system.build.usbImage = pkgs.callPackage ({ stdenvNoCC }: stdenvNoCC.mkDerivation { # name = "nixos-ps4-usbimage"; diff --git a/flake.nix b/flake.nix index 280e499..2c3887b 100644 --- a/flake.nix +++ b/flake.nix @@ -4,6 +4,11 @@ }; outputs = { self, nixpkgs }: { + nixosModules = rec { + ps4 = import ./nixos; + default = ps4; + }; + nixosConfigurations = { "aeolia" = nixpkgs.lib.nixosSystem { system = "x86_64-linux"; @@ -15,6 +20,7 @@ }) ]; }) ./aeolia-config.nix + ./config.nix ]; }; }; diff --git a/nixos/default.nix b/nixos/default.nix new file mode 100644 index 0000000..2ed88f2 --- /dev/null +++ b/nixos/default.nix @@ -0,0 +1,119 @@ +{ lib, config, pkgs, modulesPath, ... }: { + options.ps4 = with lib; { + enable = mkEnableOption "Build NixOS for Sony PlayStation 4."; + + usbImage = { + imageName = mkOption { + type = types.str; + default = "${config.ps4.usbImage.imageBaseName}-${config.system.nixos.label}.img"; + description = "Name of the generated image file."; + }; + + imageBaseName = mkOption { + type = types.str; + default = "ps4nixos"; + description = "Prefix of the name of the generated image file."; + }; + + compressImage = mkOption { + type = types.bool; + default = false; + description = "Compress the resulting image with zstd."; + }; + + bootPartitionSize = mkOption { + type = types.int; + default = 128; + description = "Size of the boot partition, in mebibytes (1024x1024 bytes)."; + }; + + bootPartitionLabel = mkOption { + type = types.str; + default = "nixos-boot"; + description = "Label to give the boot partition of the image."; + }; + + rootPartitionLabel = mkOption { + type = types.str; + default = "nixos-root"; + description = "Label to give the root partition of the image."; + }; + + expandOnBoot = mkOption { + type = types.bool; + default = true; + description = "Whether the image should expand the root partition on first boot."; + }; + + firstbootFile = mkOption { + type = types.str; + default = "/firstboot"; + description = '' + Location of the file that allows commands to be run on first boot. + If overriding fileSystems."/" then you should to set this to the root mount + /firstboot + ''; + }; + }; + }; + + config = let cfg = config.ps4; in lib.mkIf cfg.enable { + fileSystems = { + "/boot" = { + device = "/dev/disk/by-label/${cfg.usbImage.bootPartitionLabel}"; + fsType = "vfat"; + options = [ "nofail" "noauto" ]; + }; + "/" = { + device = "/dev/disk/by-label/${cfg.usbImage.rootPartitionLabel}"; + fsType = "ext4"; + }; + }; + + boot.loader.grub.enable = lib.mkForce false; + + # from https://github.com/NixOS/nixpkgs/blob/e405f30513169feedb64b5c25e7b00242010af58/nixos/modules/installer/sd-card/sd-image.nix#L267 + boot.postBootCommands = let + expandOnBoot = lib.optionalString cfg.usbImage.expandOnBoot '' + # Figure out device names for the boot device and root filesystem. + rootPart=$(${pkgs.util-linux}/bin/findmnt -n -o SOURCE /) + bootDevice=$(lsblk -npo PKNAME $rootPart) + partNum=$(lsblk -npo MAJ:MIN $rootPart | ${pkgs.gawk}/bin/awk -F: '{print $2}') + + # Resize the root partition and the filesystem to fit the disk + echo ",+," | sfdisk -N$partNum --no-reread $bootDevice + ${pkgs.parted}/bin/partprobe + ${pkgs.e2fsprogs}/bin/resize2fs $rootPart + ''; + inherit (cfg.usbImage) firstbootFile; + in '' + # On the first boot do some maintenance tasks + if [ -f ${firstbootFile} ]; then + set -euo pipefail + set -x + + ${expandOnBoot} + + # TODO what does all this do? + + # Register the contents of the initial Nix store + # ${config.nix.package.out}/bin/nix-store --load-db < ${firstbootFile} + + # nixos-rebuild also requires a "system" profile and an /etc/NIXOS tag. + # touch /etc/NIXOS + ${config.nix.package.out}/bin/nix-env -p /nix/var/nix/profiles/system --set /run/current-system + + # Prevents this from running on later boots. + rm -f ${firstbootFile} + fi + ''; + + system.build.rootFileSystem = pkgs.callPackage (modulesPath + "/../lib/make-ext4-fs.nix") { + storePaths = [ config.system.build.toplevel ]; + volumeLabel = cfg.usbImage.rootPartitionLabel; + populateImageCommands = '' + cp ${config.system.build.toplevel}/init ./files/init + touch ./files/firstboot + ''; + }; + }; +}