From 9a6d742a6a1bf0b9297f0d1cbd6024bbc50dd740 Mon Sep 17 00:00:00 2001
From: intergrav <devin@devins.page>
Date: Sun, 12 Jul 2026 16:13:05 -0400
Subject: [PATCH] feat: navidrome playlist ipod sync

---
 hosts/nixos/bluepill/services/ipod-sync.nix | 125 +++++++++++++++++++-
 secrets/ipod-sync.age                       | Bin 0 -> 371 bytes
 secrets/secrets.nix                         |   1 +
 3 files changed, 120 insertions(+), 6 deletions(-)
 create mode 100644 secrets/ipod-sync.age

diff --git a/hosts/nixos/bluepill/services/ipod-sync.nix b/hosts/nixos/bluepill/services/ipod-sync.nix
index 9b15282..84ba8f8 100644
--- a/hosts/nixos/bluepill/services/ipod-sync.nix
+++ b/hosts/nixos/bluepill/services/ipod-sync.nix
@@ -1,21 +1,123 @@
-{pkgs, ...}: let
+{
+  config,
+  pkgs,
+  ...
+}: let
   ipodUuid = "A751-935A";
+  musicDir = "/srv/media/music";
 in {
+  age.secrets.ipod-sync = {
+    file = ../../../../secrets/ipod_sync.age;
+  };
+
   services.udev.extraRules = ''
     ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="partition", ENV{ID_FS_UUID}=="${ipodUuid}", TAG+="systemd", ENV{SYSTEMD_WANTS}+="ipod-sync.service"
   '';
 
   systemd.services.ipod-sync = {
-    description = "Sync music to iPod";
+    description = "Sync Navidrome playlists and music to iPod";
+
+    wants = ["navidrome.service"];
+    after = ["navidrome.service"];
 
     serviceConfig = {
       Type = "oneshot";
-      RuntimeDirectory = "ipod";
-      TimeoutStartSec = "4h";
+      RuntimeDirectory = [
+        "ipod"
+        "ipod-sync"
+      ];
+      TimeoutStartSec = "8h";
+      EnvironmentFile = config.age.secrets.ipod-sync.path;
     };
 
     script = ''
-      set -eu
+      set -euo pipefail
+
+      ${pkgs.python3}/bin/python3 <<'PY'
+      import hashlib
+      import json
+      import os
+      import re
+      import secrets
+      from pathlib import Path, PurePosixPath
+      from urllib.parse import urlencode
+      from urllib.request import urlopen
+
+      username = os.environ["NAVIDROME_USERNAME"]
+      password = os.environ["NAVIDROME_PASSWORD"]
+      source = PurePosixPath("${musicDir}")
+      destination = Path("/run/ipod-sync")
+
+      def api(method, **params):
+          salt = secrets.token_hex(8)
+          token = hashlib.md5(
+              (password + salt).encode(),
+              usedforsecurity=False,
+          ).hexdigest()
+
+          query = urlencode({
+              "u": username,
+              "t": token,
+              "s": salt,
+              "v": "1.16.1",
+              "c": "ipod-sync",
+              "f": "json",
+              **params,
+          })
+
+          with urlopen(
+              "http://127.0.0.1:"
+              "${toString config.services.navidrome.settings.Port}"
+              f"/rest/{method}.view?{query}",
+              timeout=30,
+          ) as response:
+              result = json.load(response)["subsonic-response"]
+
+          if result["status"] != "ok":
+              raise RuntimeError(
+                  result.get("error", {}).get("message", method)
+              )
+
+          return result
+
+      used_names = set()
+
+      for summary in (
+          api("getPlaylists")
+          .get("playlists", {})
+          .get("playlist", [])
+      ):
+          playlist = api("getPlaylist", id=summary["id"])["playlist"]
+
+          name = re.sub(
+              r'[\x00-\x1f<>:"/\\|?*]',
+              "_",
+              playlist["name"],
+          )
+          name = name[:200].rstrip(" .") or playlist["id"]
+          filename = f"{name}.m3u8"
+
+          if filename.casefold() in used_names:
+              filename = f"{name} [{playlist['id'][:8]}].m3u8"
+
+          used_names.add(filename.casefold())
+          tracks = []
+
+          for entry in playlist.get("entry", []):
+              path = PurePosixPath(entry["path"])
+              relative = path.relative_to(source)
+              tracks.append(f"/Sync/{relative.as_posix()}")
+
+          (destination / filename).write_text(
+              "\n".join(tracks) + ("\n" if tracks else ""),
+              encoding="utf-8",
+              newline="\n",
+          )
+
+      print(f"generated {len(used_names)} Navidrome playlists")
+      PY
+
+      unset NAVIDROME_USERNAME NAVIDROME_PASSWORD
 
       ${pkgs.util-linux}/bin/mount \
         /dev/disk/by-uuid/${ipodUuid} \
@@ -27,8 +129,19 @@ in {
         -rt \
         --delete \
         --modify-window=1 \
-        /srv/media/music/ \
+        --human-readable \
+        --info=stats2,name1 \
+        ${musicDir}/ \
         /run/ipod/Sync/
+
+      ${pkgs.rsync}/bin/rsync \
+        -rc \
+        --delete \
+        --mkpath \
+        --human-readable \
+        --info=stats2,name1 \
+        /run/ipod-sync/ \
+        /run/ipod/Playlists/Navidrome/
     '';
   };
 }
diff --git a/secrets/ipod-sync.age b/secrets/ipod-sync.age
new file mode 100644
index 0000000000000000000000000000000000000000..b02a92a43c02c6bcc48d4c52bd58930cfa0f48f4
GIT binary patch
literal 371
zcmYdHPt{G$OD?J`D9Oyv)5|YP*Do{V(zR14F3!+RO))YxHMCT4a?(#Ta#ScRDK9p$
z2rV)*@iB1pajf*x4l^srC`?W(Os{k{jVdoR$&5<(EX+vt@a4)bbTmpTHO|k?GtW#8
zDt9%_tSZc?aE!|GG4V?Y^9nTx2sJ2jb<GOQFGsg6EHK60Jy5~h!q=$EKfox`&!Rjk
zxX{PfJvAWGr&2pfKfoZu+`}>`Fw3#PE#Dx>qnNA6-ODg3+rre}C*0LB+pW?(EZp6r
z%AmZ$*xA@9EipVb$k8z`&Bw#H+?PvNS687TH!Q`Y($T{$J1jRU%eTy{vaq};#M>mP
zJT<?x)Yr*0E8Qb3$1F3_%a^O~%cAWJ{t7p&1Ou%X_4zei4SIXfkS{ByrghN|=98bi
zuJ05(G)ufi>B-itqt~)`@SH1g(%d}PhVA$2%-KiG4y?{jsJs2kP@!bWJ0EdzrQbGI
E0Jl1X#{d8T

literal 0
HcmV?d00001

diff --git a/secrets/secrets.nix b/secrets/secrets.nix
index df8da41..657be02 100644
--- a/secrets/secrets.nix
+++ b/secrets/secrets.nix
@@ -5,6 +5,7 @@ let
   devin = "age1reah3h72zsk29ahhd0eskyque2s3exjvpt695mrytc6wqzetpcdqqr758y";
 in {
   "draupnir-at.age".publicKeys = [bluepill d-macbook];
+  "ipod-sync.age".publicKeys = [bluepill d-macbook];
   "msmtp.age".publicKeys = [bluepill d-macbook];
   "navidrome.age".publicKeys = [bluepill d-macbook];
   "slskd.age".publicKeys = [bluepill d-macbook];
-- 
2.51.2