lib: add filesystems

lib/default.nix

@@ -64,6 +64,7 @@ rec {
   };
 
   disko = import ./disko.nix { inherit lib; };
+  filesystems = import ./filesystems.nix { inherit lib self; };
 } // (
   import ./digga.nix { inherit lib; }
 ) // (

lib/filesystems.nix

@@ -0,0 +1,45 @@
+{ lib, self }:
+
+rec {
+  diskByUuid = uuid: "/dev/disk/by-uuid/${uuid}";
+
+  mkFilesystemDev = fsType: device: common: options: {
+    inherit device fsType;
+    options = common ++ options;
+  };
+
+  neededForBoot = self.lazy (fs: fs // { neededForBoot = true; });
+
+  mkFilesystemDev' = f: d: c: o:
+    neededForBoot (mkFilesystemDev f d c o);
+
+  mkFilesystem = fsType: uuid:
+    mkFilesystemDev fsType (diskByUuid uuid);
+
+  mkFilesystem' = f: d: c: o:
+    neededForBoot (mkFilesystemDev f d c o);
+
+
+  mkEFI = uuid: neededForBoot {
+    device = diskByUuid uuid;
+    fsType = "vfat";
+  };
+  mkTmpfs = name: size: neededForBoot {
+    device = name;
+    fsType = "tmpfs";
+    options = [ "defaults" "size=${size}" "mode=755" ];
+  };
+  mkBtrfs' = options: uuid: extraOptions: {
+    device = diskByUuid uuid;
+    fsType = "btrfs";
+    options = options ++ extraOptions;
+  };
+  mkBtrfs = mkBtrfs' [
+    "autodefrag"
+    "noatime"
+    "ssd"
+    "compress=zstd:1"
+  ];
+
+  mkSwap = uuid: { device = diskByUuid uuid; };
+}