tidy-html5: added package, also provides libtidy5

pkgs/tools/text/tidy-html5/default.nix

@@ -0,0 +1,24 @@
+{ stdenv, lib, cmake, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation rec {
+
+  name = "tidy-html5";
+  version = "4.9.30";
+
+  src = fetchFromGitHub {
+    owner = "htacg";
+    repo = "tidy-html5";
+    rev = version;
+    sha256 = "0hd4c23352r5lnh23mx137wb4mkxcjdrl1dy8kgghszik5fprs3s";
+  };
+
+  buildInputs = [ cmake ];
+
+  meta = with stdenv.lib; {
+    description = "The granddaddy of HTML tools, with support for modern standards";
+    homepage = "http://www.html-tidy.org/";
+    license = licenses.w3c;
+    maintainers = with maintainers; [ edwtjo ];
+  };
+
+}

pkgs/top-level/all-packages.nix

@@ -3122,6 +3122,8 @@ let
 
   tftp_hpa = callPackage ../tools/networking/tftp-hpa {};
 
+  tidy-html5 = callPackage ../tools/text/tidy-html5 { };
+
   tigervnc = callPackage ../tools/admin/tigervnc {
     fontDirectories = [ xorg.fontadobe75dpi xorg.fontmiscmisc xorg.fontcursormisc
       xorg.fontbhlucidatypewriter75dpi ];