spotifyd: fix errors

- Fixes errors in configuration
- Add an overlay to use an older Rust version to build spotifyd until
  Spotifyd/spotifyd#719 is fixed.

home/spotify.nix

@@ -25,7 +25,7 @@ in
       global = {
         username = "demoneaux";
         device_name = "spotifyd";
-        use_keyring = "true";
+        use_keyring = true;
         onevent = "${notificationsScript}";
       };
     };

pkgs/default.nix

@@ -6,4 +6,5 @@ final: prev:
   ttf-console-font = prev.callPackage ./ttf-console-font.nix {  };
   otf2bdf = prev.callPackage ./otf2bdf {  };
   qtspim = prev.qt5.callPackage ./qtspim.nix {  };
+  spotifyd = prev.callPackage ./spotifyd.nix {  };
 }

pkgs/spotifyd.nix

@@ -0,0 +1,49 @@
+{ lib, fetchFromGitHub, rustPackages_1_45, pkg-config, openssl
+, withALSA ? true, alsaLib ? null
+, withPulseAudio ? false, libpulseaudio ? null
+, withPortAudio ? false, portaudio ? null
+, withMpris ? false
+, withKeyring ? false
+, dbus ? null
+}:
+
+# rust >= 1.48 causes a panic within spotifyd on music playback. as long as
+# there is no upstream fix for the issue we use an older version of rust.
+# Upstream issue: https://github.com/Spotifyd/spotifyd/issues/719
+rustPackages_1_45.rustPlatform.buildRustPackage rec {
+  pname = "spotifyd";
+  version = "0.3.0";
+
+  src = fetchFromGitHub {
+    owner = "Spotifyd";
+    repo = "spotifyd";
+    rev = "v${version}";
+    sha256 = "055njhy9if4qpsbgbr6615xxhcx9plava1m4l323vi4dbw09wh5r";
+  };
+
+  cargoSha256 = "1ijrl208607abjwpr3cajcbj6sr35bk6ik778a58zf28kzdhrawc";
+
+  cargoBuildFlags = [
+    "--no-default-features"
+    "--features"
+    "${lib.optionalString withALSA "alsa_backend,"}${lib.optionalString withPulseAudio "pulseaudio_backend,"}${lib.optionalString withPortAudio "portaudio_backend,"}${lib.optionalString withMpris "dbus_mpris,"}${lib.optionalString withKeyring "dbus_keyring,"}"
+  ];
+
+  nativeBuildInputs = [ pkg-config ];
+
+  buildInputs = [ openssl ]
+    ++ lib.optional withALSA alsaLib
+    ++ lib.optional withPulseAudio libpulseaudio
+    ++ lib.optional withPortAudio portaudio
+    ++ lib.optional (withMpris || withKeyring) dbus;
+
+  doCheck = false;
+
+  meta = with lib; {
+    description = "An open source Spotify client running as a UNIX daemon";
+    homepage = "https://github.com/Spotifyd/spotifyd";
+    license = with licenses; [ gpl3 ];
+    maintainers = with maintainers; [ anderslundstedt Br1ght0ne marsam ];
+    platforms = platforms.unix;
+  };
+}