mp3cat init at 0.5

Adding package mp3cat, a command line mp3 utility which will concatenate
multiple mp3 files, and keep only the audio frames, discarding headers
and so on.

pkgs/tools/audio/mp3cat/default.nix

@@ -0,0 +1,34 @@
+{ stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "mp3cat";
+  version = "0.5";
+
+  src = fetchFromGitHub {
+    owner = "tomclegg";
+    repo = pname;
+    rev = version;
+    sha256 = "0n6hjg2wgd06m561zc3ib5w2m3pwpf74njv2b2w4sqqh5md2ymfr";
+  };
+
+  makeFlags = [
+    "PREFIX=${placeholder ''out''}"
+  ];
+
+  installTargets = [
+    "install_bin"
+  ];
+
+  meta = with stdenv.lib; {
+    description = "A command line program which concatenates MP3 files";
+    longDescription = ''
+      A command line program which concatenates MP3 files, mp3cat
+      only outputs MP3 frames with valid headers, even if there is extra garbage
+      in its input stream
+    '';
+    homepage = https://github.com/tomclegg/mp3cat;
+    license = licenses.gpl2;
+    maintainers = [ maintainers.omnipotententity ];
+    platforms = platforms.all;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -1680,6 +1680,8 @@ in
 
   mp3blaster = callPackage ../applications/audio/mp3blaster { };
 
+  mp3cat = callPackage ../tools/audio/mp3cat {};
+
   mp3fs = callPackage ../tools/filesystems/mp3fs { };
 
   mpdas = callPackage ../tools/audio/mpdas { };