Describe filesystems in config

filesystems.nix

@@ -0,0 +1,42 @@
+{ config, lib, pkgs, modulesPath, ... }:
+let systemInformation = import ./system-information.nix; in
+{
+	boot.initrd.luks.devices = {
+		cryptoroot = {
+			device = systemInformation.rootPartition;
+			allowDiscards = true;
+			bypassWorkqueues = true;
+		};
+		cryptoswap = {
+			device = systemInformation.swapPartition;
+			keyFile = "/crypto_keyfile.bin";
+			allowDiscards = true;
+			bypassWorkqueues = true;
+		};
+	};
+	fileSystems = {
+		"/" = {
+			device = "/dev/mapper/cryptoroot";
+			options = [
+				"defaults"
+
+				# Batch journaling commits to 2 minutes for power saving
+				# https://wiki.archlinux.org/title/Power_management#Writeback_Time
+				"commit=120"
+			];
+
+			# Uncomment this once the root fs is actually btrfs
+			# fsType = "btrfs";
+		};
+		"/boot/efi" = {
+			device = systemInformation.efiPartition;
+			fsType = "vfat";
+		};
+	};
+	swapDevices = [
+		{
+			device = "/dev/mapper/cryptoswap";
+			discardPolicy = "both";
+		}
+	];
+}

nixos.nix

@@ -14,6 +14,7 @@
 			#
 			# Also make sure to move the swap configuration to the hardware config
 			/etc/nixos/hardware-configuration.nix
+			./filesystems.nix
 			<home-manager/nixos>
 		];
 

system-information.nix

@@ -0,0 +1,5 @@
+{
+	rootPartition = "/dev/disk/by-uuid/850e0a62-fd82-4360-b4d7-258817e86380";
+	swapPartition = "/dev/disk/by-uuid/6144d426-6c5f-4a8a-ac16-d4d5eecbf7a0";
+	efiPartition = "/dev/disk/by-uuid/E5A8-38EA";
+}