1 files changed, 82 insertions, 75 deletions
diff --git a/sys/fs/btrfs.nix b/sys/fs/btrfs.nix
index 87c9fca..809d35e 100644
--- a/sys/fs/btrfs.nix
+++ b/sys/fs/btrfs.nix
@@ -1,15 +1,16 @@
 { lib, config, pkgs, ... }:
 with lib; let
   cfg = config.local;
-in {
+in
+{
   options.local = with lib.types; {
     snapperSubvols = mkOption {
       type = attrsOf str;
-      default = {};
+      default = { };
     };
 
     fs.btrfs = mkOption {
-      default = [];
+      default = [ ];
 
       type = attrsOf (submodule {
         options = {
@@ -35,77 +36,83 @@ in {
   };
 
   config = {
-    environment.systemPackages = optional (cfg.snapperSubvols != {}) pkgs.local.btclone;
-
-    fileSystems = let
-      inherit (cfg) fs;
-      btrfs = { device, subvol, ssd, ... }: {
-        inherit device;
-        fsType = "btrfs";
-        options = [ "noatime" "compress=zstd" "subvol=${subvol}" ] ++ optional ssd "ssd";
-      };
-    in mapAttrs (_: btrfs) cfg.fs.btrfs;
-
-    local.snapperSubvols = let
-      snapperEntry = path: opts: { name = opts.snapper; value = path; };
-      validEntry = _: opts: opts.snapper != null;
-    in mapAttrs' snapperEntry (filterAttrs validEntry cfg.fs.btrfs);
-
-    services.snapper.configs = let
-      snapperConfig = _: subvolume: {
-        inherit subvolume;
-
-        extraConfig = ''
-          # btrfs qgroup for space aware cleanup algorithms
-          QGROUP=""
-
-          # fraction of the filesystems space the snapshots may use
-          SPACE_LIMIT="0.5"
-
-          # fraction of the filesystems space that should be free
-          FREE_LIMIT="0.2"
-
-          # users and groups allowed to work with config
-          ALLOW_USERS=""
-          ALLOW_GROUPS=""
-
-          # sync users and groups from ALLOW_USERS and ALLOW_GROUPS to .snapshots
-          # directory
-          SYNC_ACL="no"
-
-          # start comparing pre- and post-snapshot in background after creating
-          # post-snapshot
-          BACKGROUND_COMPARISON="yes"
-
-          # run daily number cleanup
-          NUMBER_CLEANUP="yes"
-
-          # limit for number cleanup
-          NUMBER_MIN_AGE="1800"
-          NUMBER_LIMIT="100"
-          NUMBER_LIMIT_IMPORTANT="10"
-
-          # create hourly snapshots
-          TIMELINE_CREATE="yes"
-
-          # cleanup hourly snapshots after some time
-          TIMELINE_CLEANUP="yes"
-
-          # limits for timeline cleanup
-          TIMELINE_MIN_AGE="1800"
-          TIMELINE_LIMIT_HOURLY="24"
-          TIMELINE_LIMIT_DAILY="7"
-          TIMELINE_LIMIT_WEEKLY="4"
-          TIMELINE_LIMIT_MONTHLY="12"
-          TIMELINE_LIMIT_YEARLY="10"
-
-          # cleanup empty pre-post-pairs
-          EMPTY_PRE_POST_CLEANUP="yes"
-
-          # limits for empty pre-post-pair cleanup
-          EMPTY_PRE_POST_MIN_AGE="1800"
-        '';
-      };
-    in mapAttrs snapperConfig cfg.snapperSubvols;
+    environment.systemPackages = optional (cfg.snapperSubvols != { }) pkgs.local.btclone;
+
+    fileSystems =
+      let
+        inherit (cfg) fs;
+        btrfs = { device, subvol, ssd, ... }: {
+          inherit device;
+          fsType = "btrfs";
+          options = [ "noatime" "compress=zstd" "subvol=${subvol}" ] ++ optional ssd "ssd";
+        };
+      in
+      mapAttrs (_: btrfs) cfg.fs.btrfs;
+
+    local.snapperSubvols =
+      let
+        snapperEntry = path: opts: { name = opts.snapper; value = path; };
+        validEntry = _: opts: opts.snapper != null;
+      in
+      mapAttrs' snapperEntry (filterAttrs validEntry cfg.fs.btrfs);
+
+    services.snapper.configs =
+      let
+        snapperConfig = _: subvolume: {
+          inherit subvolume;
+
+          extraConfig = ''
+            # btrfs qgroup for space aware cleanup algorithms
+            QGROUP=""
+
+            # fraction of the filesystems space the snapshots may use
+            SPACE_LIMIT="0.5"
+
+            # fraction of the filesystems space that should be free
+            FREE_LIMIT="0.2"
+
+            # users and groups allowed to work with config
+            ALLOW_USERS=""
+            ALLOW_GROUPS=""
+
+            # sync users and groups from ALLOW_USERS and ALLOW_GROUPS to .snapshots
+            # directory
+            SYNC_ACL="no"
+
+            # start comparing pre- and post-snapshot in background after creating
+            # post-snapshot
+            BACKGROUND_COMPARISON="yes"
+
+            # run daily number cleanup
+            NUMBER_CLEANUP="yes"
+
+            # limit for number cleanup
+            NUMBER_MIN_AGE="1800"
+            NUMBER_LIMIT="100"
+            NUMBER_LIMIT_IMPORTANT="10"
+
+            # create hourly snapshots
+            TIMELINE_CREATE="yes"
+
+            # cleanup hourly snapshots after some time
+            TIMELINE_CLEANUP="yes"
+
+            # limits for timeline cleanup
+            TIMELINE_MIN_AGE="1800"
+            TIMELINE_LIMIT_HOURLY="24"
+            TIMELINE_LIMIT_DAILY="7"
+            TIMELINE_LIMIT_WEEKLY="4"
+            TIMELINE_LIMIT_MONTHLY="12"
+            TIMELINE_LIMIT_YEARLY="10"
+
+            # cleanup empty pre-post-pairs
+            EMPTY_PRE_POST_CLEANUP="yes"
+
+            # limits for empty pre-post-pair cleanup
+            EMPTY_PRE_POST_MIN_AGE="1800"
+          '';
+        };
+      in
+      mapAttrs snapperConfig cfg.snapperSubvols;
   };
 }