From 0781321e3285d904e0a33325ef41b04c5a8e2bd1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Madeleine=20Sydney=20=C5=9Alaga?= <msyds@deertopia.net>
Date: Wed, 8 Jul 2026 23:19:20 -0600
Subject: [PATCH] feat(beats): init

---
 hosts/deertopia/configuration.nix |  1 +
 modules/nixos/deertopia/beets.nix | 67 +++++++++++++++++++++++++++++++
 users/lain/default.nix            |  1 +
 3 files changed, 69 insertions(+)
 create mode 100644 modules/nixos/deertopia/beets.nix

diff --git a/hosts/deertopia/configuration.nix b/hosts/deertopia/configuration.nix
index 6981616..229db1a 100644
--- a/hosts/deertopia/configuration.nix
+++ b/hosts/deertopia/configuration.nix
@@ -67,6 +67,7 @@
       murmur.enable = true;
       anki-sync-server.enable = true;
       vaultwarden.enable = true;
+      beets.enable = true;
       servarr = {
         enable = true;
         prowlarr.enable = true;
diff --git a/modules/nixos/deertopia/beets.nix b/modules/nixos/deertopia/beets.nix
new file mode 100644
index 0000000..d6736b2
--- /dev/null
+++ b/modules/nixos/deertopia/beets.nix
@@ -0,0 +1,67 @@
+{ config, lib, pkgs, ... }:
+
+let cfg = config.sydnix.deertopia.beets;
+in {
+  options.sydnix.deertopia.beets = {
+    enable = lib.mkEnableOption "Beets";
+    user = lib.mkOption {
+      default = "beets";
+      type = lib.types.str;
+      description = ''
+        Name of the user which owns the Beets database.
+      '';
+    };
+    group = lib.mkOption {
+      default = "beets";
+      type = lib.types.str;
+      description = ''
+        Name of the group which owns the Beets database.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    users.users.${cfg.user} = {
+      description = "Beets";
+      isSystemUser = true;
+      inherit (cfg) group;
+    };
+
+    users.groups.${cfg.group} = {};
+
+    # Persist allowed directories.
+    sydnix.impermanence.directories = [
+      {
+        directory = "/var/lib/beets";
+        inherit (cfg) user group;
+        mode = "u=rwx,g=rwx,o=";
+      }
+    ];
+
+    environment.systemPackages = [
+      pkgs.beets
+    ];
+
+    environment.sessionVariables.BEETSDIR = "/var/lib/beets";
+    systemd.tmpfiles.settings."50-var-lib-beets-beets-yaml" = {
+      "/var/lib/beets/beets.yaml"."L+".argument =
+        lib.toString
+          (pkgs.writeText
+            "beets.yaml"
+            (lib.toJSON {
+              directory = "/media/library/music";
+              library = "/var/lib/beets/beets.db";
+              import = {
+                copy = true;
+                write = true;
+                incremental = true;
+              };
+              paths = {
+                default = "$albumartist/$album%aunique{} ($year)/$track $title";
+                singleton = "Non-Album/$artist/$title";
+                comp = "Compilations/$album%aunique{} ($year)/$title";
+              };
+            }));
+    };
+  };
+}
diff --git a/users/lain/default.nix b/users/lain/default.nix
index a2b573b..fe2891e 100644
--- a/users/lain/default.nix
+++ b/users/lain/default.nix
@@ -18,6 +18,7 @@
       "slskd"
       # Can access Nixarr's media.
       "media"
+      "beets"
     ];
     initialHashedPassword =
       "$y$j9T$aEFDDwdTZbAc6VQRXrkBJ0$K8wxTGTWDihyX1wxJ.ZMH//wmQFfrGGUkLkxIU0Lyq8";