feat(users/Profpatsch/lyrics): integrate into an mpv extension

Slop it together! The mpv script is entirely generated by ChatGPT.

Whoooooooooo

Change-Id: Ic284d142c2f1fd6d407af6b3571db0e815604051
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12478
Reviewed-by: Profpatsch <mail@profpatsch.de>
Tested-by: BuildkiteCI

users/Profpatsch/lyric/default.nix

@@ -0,0 +1,92 @@
+{ pkgs, depot, lib, ... }:
+
+let
+  bins = depot.nix.getBins pkgs.sqlite-utils [ "sqlite-utils" ]
+    // depot.nix.getBins pkgs.jq [ "jq" ];
+
+  mpv-script = pkgs.writeTextFile {
+    name = "lyric.lua";
+    text =
+      lib.replaceStrings
+        [ "@get_subtitles_command@" ]
+        [ (toString lyric-to-temp-file) ]
+        (builtins.readFile ./lyric-mpv-script.lua);
+    derivationArgs.passthru.scriptName = "lyric.lua";
+  };
+
+  lyric-to-temp-file = depot.nix.writeExecline "lyric-to-temp-file" { readNArgs = 1; } [
+    "backtick"
+    "-E"
+    "cache"
+    [ depot.users.Profpatsch.xdg-cache-home ]
+    "if"
+    [ "mkdir" "-p" "\${cache}/lyric/as-files" ]
+    "if"
+    [
+      "redirfd"
+      "-w"
+      "1"
+      "\${cache}/lyric/as-files/\${1}.lrc"
+      lyric
+      "$1"
+    ]
+    "printf"
+    "\${cache}/lyric/as-files/\${1}.lrc"
+  ];
+
+  # Display lyrics for the given search string;
+  # search string can contain a substring of band name, album name, song title
+  #
+  # Use the database dump from https://lrclib.net/db-dumps and place it in ~/.cache/lyric/lrclib-db-dump.sqlite3
+  lyric =
+
+    (depot.nix.writeExecline "lyric" { readNArgs = 1; } [
+      "backtick"
+      "-E"
+      "cache"
+      [ depot.users.Profpatsch.xdg-cache-home ]
+      "pipeline"
+      [
+        bins.sqlite-utils
+        "query"
+        "\${cache}/lyric/lrclib-db-dump.sqlite3"
+        ''
+          select
+              synced_lyrics,
+              has_synced_lyrics,
+              plain_lyrics
+          from
+              tracks_fts(:searchstring) tf
+              join tracks t on t.rowid = tf.rowid
+              join lyrics l on t.rowid = l.track_id
+          order by
+              has_synced_lyrics desc, t.id
+          limit
+              1
+        ''
+        "--param"
+        "searchstring"
+        "$1"
+      ]
+      bins.jq
+      "-r"
+      ''
+        if .[0] == null
+        then ""
+        else
+        .[0]
+            | if .has_synced_lyrics == 1
+            then .synced_lyrics
+            else .plain_lyrics
+            end
+        end
+      ''
+    ]);
+
+
+in
+{
+  inherit
+    lyric
+    mpv-script;
+}