116 lines
3.1 KiB
Nix
116 lines
3.1 KiB
Nix
{ lib, config, ... }:
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let
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cfg = config.aux.system.filesystem.btrfs;
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standardMountOpts = [ "compress=zstd" ];
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in
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{
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options = {
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aux.system.filesystem.btrfs = {
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enable = lib.mkEnableOption (lib.mdDoc "Enables standard BTRFS subvolumes and parameters.");
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devices = {
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boot = lib.mkOption {
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type = lib.types.str;
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description = "The ID of your boot partition. Use /dev/disk/by-uuid for best results.";
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default = "";
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};
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btrfs = lib.mkOption {
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type = lib.types.str;
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description = "The ID of your BTRFS partition. Use /dev/disk/by-uuid for best results.";
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default = "";
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};
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};
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subvolumes = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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description = "Which subvolumes to mount. Leave as the default to create all standard subvolumes.";
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default = [
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"/"
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"/home"
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"/nix"
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"/var/log"
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];
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};
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swapFile = {
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enable = lib.mkEnableOption (lib.mdDoc "Enables the creation of a swap file.");
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size = lib.mkOption {
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type = lib.types.int;
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description = "The size of the swap file to create in MB (defaults to 8192, or ~8 gigabytes).";
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default = 8192;
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};
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};
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};
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};
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config = lib.mkIf cfg.enable {
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# Check for blank parameters
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assertions = [
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{
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assertion = cfg.devices.btrfs != "";
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message = "Please specify a BTRFS partition to use as a filesystem.";
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}
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{
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assertion = cfg.devices.boot != "";
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message = "Please specify a boot partition to use as a filesystem.";
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}
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];
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fileSystems =
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{
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"/" = lib.mkIf (builtins.elem "/" cfg.subvolumes) {
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device = cfg.devices.btrfs;
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fsType = "btrfs";
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options = [
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"subvol=@"
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"compress=zstd"
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];
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};
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"/boot" = {
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device = cfg.devices.boot;
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fsType = "vfat";
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};
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"/home" = lib.mkIf (builtins.elem "/home" cfg.subvolumes) {
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device = cfg.devices.btrfs;
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fsType = "btrfs";
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options = [
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"subvol=@home"
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"compress=zstd"
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];
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};
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"/var/log" = lib.mkIf (builtins.elem "/var/log" cfg.subvolumes) {
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device = cfg.devices.btrfs;
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fsType = "btrfs";
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options = [
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"subvol=@log"
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"compress=zstd"
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];
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};
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"/nix" = lib.mkIf (builtins.elem "/nix" cfg.subvolumes) {
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device = cfg.devices.btrfs;
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fsType = "btrfs";
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options = [
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"subvol=@nix"
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"compress=zstd"
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"noatime"
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];
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};
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}
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// lib.optionalAttrs cfg.swapFile.enable {
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"/swap" = {
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device = cfg.devices.btrfs;
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fsType = "btrfs";
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options = [
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"subvol=@swap"
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"noatime"
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];
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};
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};
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swapDevices = lib.mkIf cfg.swapFile.enable [
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{
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device = "/swap/swapfile";
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size = cfg.swapFile.size;
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}
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];
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};
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}
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