From e32cdbe2c890a89c8fabb6a0af9a864eb5a61726 Mon Sep 17 00:00:00 2001
From: Jakub Dlugosz <me@jdlugosz.com>
Date: Fri, 19 Sep 2025 18:53:48 +0200
Subject: Switch to btrfs

---
 src/jd/host.scm | 73 ++++++++++++++++++++++++++++++++++++---------------------
 1 file changed, 46 insertions(+), 27 deletions(-)

diff --git a/src/jd/host.scm b/src/jd/host.scm
index d94d0e2..1bd5c30 100644
--- a/src/jd/host.scm
+++ b/src/jd/host.scm
@@ -6,39 +6,58 @@
   #:use-module (gnu system mapped-devices)
   #:use-module (ice-9 match))
 
+(define mapped-devices
+  (list (mapped-device
+         (source (uuid "3fcc2e44-77bb-4a62-bbdc-f8c646fccbd2"))
+         (target "enc")
+         (type luks-device-mapping))))
+
+(define btrfs-subvolumes
+  (map (match-lambda
+         ((subvol . mount-point)
+          (file-system
+           (type "btrfs")
+           (device "/dev/mapper/enc")
+           (mount-point mount-point)
+           (options (format #f "subvol=~a" subvol))
+           (dependencies mapped-devices))))
+       '((@ . "/")
+         (@boot . "/boot")
+         (@gnu  . "/gnu")
+         (@nix  . "/nix")
+         (@home . "/home")
+         (@data . "/data")
+         (@var-log . "/var/log"))))
+
+(define data-fs
+  (car
+   (filter
+    (lambda (x) (equal? (file-system-mount-point x) "/data"))
+    btrfs-subvolumes)))
+
+(define file-systems
+  (append
+   btrfs-subvolumes
+   (list
+    (file-system
+     (device "/data/system/var/lib")
+     (type "none")
+     (mount-point "/var/lib")
+     (flags '(bind-mount))
+     (dependencies (list data-fs)))
+    (file-system
+     (mount-point "/boot/efi")
+     (type "vfat")
+     (device (uuid "82F1-2D6E" 'fat32))))))
+
 (define-public %host-features
   (list
    (feature-host-info
     #:host-name "berserker"
     #:timezone  "Europe/Warsaw")
    (feature-file-systems
-    #:mapped-devices (list (mapped-device
-                            (source (uuid
-                                     "1f2b1bf2-89fe-4e2c-8b40-c460572bb776"))
-                            (target "crypthome")
-                            (type luks-device-mapping)))
-    #:file-systems   (list
-                      (file-system
-                       (mount-point "/")
-                       (device (uuid
-                                "c895e61e-1a5e-470f-b7aa-a502fc0b8596"
-                                'ext4))
-                       (type "ext4"))
-                      (file-system
-                       (mount-point "/boot/efi")
-                       (device (uuid "9669-0171"
-                                     'fat32))
-                       (type "vfat"))
-                      (file-system
-                       (mount-point "/home")
-                       (device "/dev/mapper/crypthome")
-                       (type "ext4")
-                       (dependencies
-                        (list (mapped-device
-                               (source (uuid
-                                        "1f2b1bf2-89fe-4e2c-8b40-c460572bb776"))
-                               (target "crypthome")
-                               (type luks-device-mapping)))))))
+    #:mapped-devices mapped-devices
+    #:file-systems   file-systems)
    (feature-kanshi
     #:extra-config
     `((profile laptop ((output eDP-1 enable)))
-- 
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