sane-scripts: add a script for syncing Music

pkgs/sane-scripts/default.nix

@@ -1,4 +1,5 @@
 { lib
+, pkgs
 , stdenv
 }:
 
@@ -8,7 +9,7 @@ stdenv.mkDerivation {
   src = ./src;
 
   # See: https://nixos.org/nixpkgs/manual/#ssec-stdenv-dependencies
-  buildInputs = [ ];
+  buildInputs = [ pkgs.rsync ];
 
   installPhase = ''
     mkdir -p "$out"

pkgs/sane-scripts/src/bin/sane-sync

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+set -ex
+
+mnt=/mnt/media-uninsane
+if ! (test -d /mnt/media-uninsane-lan/Music)
+then
+  sudo mount /mnt/media-uninsane-lan && mnt=/mnt/media-uninsane-lan
+fi
+
+if ! (test -d $mnt/Music)
+then
+  sudo mount $mnt
+fi
+
+rsync -arv --delete --progress $mnt/Music/ ~/Music/
+