From 7c499fed495771a1571b3b5588e72d43b825cb6a Mon Sep 17 00:00:00 2001
From: LavaDesu <me@lava.moe>
Date: Sun, 18 Jun 2023 20:54:08 +0700
Subject: [PATCH] hyacinth/filesystem: add cream

---
 hosts/hyacinth/filesystem.nix | 33 +++++++++++++++++++++++++--------
 1 file changed, 25 insertions(+), 8 deletions(-)

diff --git a/hosts/hyacinth/filesystem.nix b/hosts/hyacinth/filesystem.nix
index 3d15369..2b7a296 100644
--- a/hosts/hyacinth/filesystem.nix
+++ b/hosts/hyacinth/filesystem.nix
@@ -1,13 +1,14 @@
-{ config, ... }:
+{ config, lib, ... }:
 let
   mkLabelMount = label: type: {
     device = "/dev/disk/by-label/${label}";
     fsType = type;
     options = [ "defaults" "relatime" ];
   };
-  mkBtrfsMount = subvol: atime: mkLabelMount "CAKE" "btrfs" // {
+  mkBtrfsMount = name: subvol: atime: mkLabelMount name "btrfs" // {
     options = [ "autodefrag" "compress=zstd:3" "defaults" "discard=async" "space_cache=v2" "ssd" "subvol=${subvol}" (if atime then "relatime" else "noatime") ];
   };
+  mkCakeMount = mkBtrfsMount "CAKE";
 in
 {
   fileSystems = {
@@ -18,12 +19,14 @@ in
     };
     "/boot" = mkLabelMount "CUP" "vfat";
 
-    "/mnt/butter" = mkBtrfsMount "/" true;
-    "/nix" = mkBtrfsMount "/current/snow" false;
-    "/home" = mkBtrfsMount "/current/home" true;
-    "/home/.snapshots" = mkBtrfsMount "/snapshot/home" false;
-    "/root" = mkBtrfsMount "/current/root" false;
-    "/var" = mkBtrfsMount "/current/var" false;
+    "/mnt/butter" = mkCakeMount "/" true;
+    "/mnt/cream" = mkBtrfsMount "CREAM" "/" true;
+    "/mnt/cream/permanence/.snapshots" = mkBtrfsMount "CREAM" "/snapshot/permanence" false;
+    "/nix" = mkCakeMount "/current/snow" false;
+    "/home" = mkCakeMount "/current/home" true;
+    "/home/.snapshots" = mkCakeMount "/snapshot/home" false;
+    "/root" = mkCakeMount "/current/root" false;
+    "/var" = mkCakeMount "/current/var" false;
     "/persist" = {
       depends = [ "/var" ];
       device = "/var/persist";
@@ -32,4 +35,18 @@ in
       neededForBoot = true;
     };
   };
+  services.snapper.configs.cream = {
+      fstype = "btrfs";
+      subvolume = "/mnt/cream/permanence";
+      extraConfig = lib.concatStringsSep "\n" (lib.mapAttrsToList (k: v: "${k}=${v}") {
+        TIMELINE_CLEANUP = "yes";
+        TIMELINE_CREATE = "yes";
+        TIMELINE_MIN_AGE = "1800";
+        TIMELINE_LIMIT_HOURLY = "5";
+        TIMELINE_LIMIT_DAILY = "7";
+        TIMELINE_LIMIT_WEEKLY = "0";
+        TIMELINE_LIMIT_MONTHLY = "0";
+        TIMELINE_LIMIT_YEARLY = "0";
+      });
+    };
 }