From 851ee8ea1df311cac2b87b48b0b87bb6ec2b6727 Mon Sep 17 00:00:00 2001
From: DannyDannyDanny <dth@taiga.ai>
Date: Sun, 10 May 2026 13:01:05 +0200
Subject: [PATCH] sunken-ship: mulbo-server-enrich oneshot (Phase 7.5)

Companion oneshot for mulbo-server. python312 env adds mutagen
(tag writeback); pkgs.yt-dlp on PATH for SoundCloud lookups.
Same User/SupplementaryGroups/EnvironmentFile/StateDirectory as
mulbo-server-backfill. TimeoutSec=8h covers a full library pass.

Trigger:           sudo systemctl start mulbo-server-enrich
Follow:            journalctl -fu mulbo-server-enrich

Add MULBO_ACOUSTID_KEY to /home/danny/.secrets/mulbo-server-navidrome
to enable the AcoustID source; the yt-dlp + filename sources need
no keys.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
---
 nixos/hosts/sunken-ship.nix | 39 +++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/nixos/hosts/sunken-ship.nix b/nixos/hosts/sunken-ship.nix
index 4188a41..c66010f 100644
--- a/nixos/hosts/sunken-ship.nix
+++ b/nixos/hosts/sunken-ship.nix
@@ -395,6 +395,45 @@
     };
   };
 
+  # Phase 7.5 enrichment one-shot. For tracks where Navidrome's tags
+  # are empty/Unknown, runs three sources (filename heuristics, yt-dlp
+  # for SoundCloud `[<id>]` patterns, AcoustID+MusicBrainz), votes the
+  # results, and writes back via mutagen with strict-replacement
+  # (never touches user-set tags).
+  #
+  # Trigger:           sudo systemctl start mulbo-server-enrich
+  # Follow progress:   journalctl -fu mulbo-server-enrich
+  systemd.services.mulbo-server-enrich = let
+    pythonEnv = pkgs.python312.withPackages (ps: with ps; [
+      mutagen   # tag writeback
+    ]);
+  in {
+    description = "Enrich Navidrome tracks with empty/Unknown metadata";
+    after = [ "mulbo-server.service" ];
+    requires = [ "mulbo-server.service" ];
+    path = with pkgs; [ yt-dlp ];   # provides yt-dlp for SoundCloud lookups
+    environment = {
+      MULBO_INDEX_DB         = "/var/lib/mulbo-server/index.db";
+      MULBO_NAVIDROME_DB     = "/var/lib/navidrome/navidrome.db";
+      MULBO_MUSIC_ROOT       = "/srv/music";
+      MULBO_MUSIC_WRITE_ROOT = "/home/danny/music";
+      PYTHONUNBUFFERED       = "1";
+    };
+    serviceConfig = {
+      Type             = "oneshot";
+      WorkingDirectory = "/home/danny/python-projects/20_mulbo";
+      ExecStart        = "${pythonEnv}/bin/python mulbo_server/enrich.py";
+      User             = "danny";
+      SupplementaryGroups = [ "navidrome" ];
+      StateDirectory   = "mulbo-server";
+      # Add MULBO_ACOUSTID_KEY to the secrets file to enable the
+      # AcoustID source. yt-dlp source needs no key. Filename source
+      # needs nothing.
+      EnvironmentFile  = "/home/danny/.secrets/mulbo-server-navidrome";
+      TimeoutSec       = "8h";
+    };
+  };
+
   # Auto-rebuild service/timer + safe.directory provided by the
   # shared dotfiles-rebuild NixOS module (see nixos/modules/dotfiles-rebuild.nix).
 }