yelp: new package

Yelp is the help viewer in Gnome.

https://wiki.gnome.org/Apps/Yelp

pkgs/desktops/gnome-3/core/yelp/default.nix

@@ -0,0 +1,43 @@
+{ stdenv, intltool, fetchurl, webkitgtk, pkgconfig, gtk3, glib, file
+, bash, makeWrapper, itstool, libxml2, libxslt, gnome3, icu }:
+
+# TODO: icons and theme still does not work
+# use packaged gnome3.gnome_icon_theme_symbolic 
+
+stdenv.mkDerivation rec {
+  name = "yelp-3.10.1";
+
+  src = fetchurl {
+    url = "https://download.gnome.org/sources/yelp/3.10/${name}.tar.xz";
+    sha256 = "17736479b7d0b1128c7d6cb3073f2b09e4bbc82670731b2a0d3a3219a520f816";
+  };
+
+  configureFlags = [ "--disable-static" ];
+
+  doCheck = true;
+
+  propagatedUserEnvPkgs = [ gnome3.gnome_themes_standard ];
+
+  preConfigure = "substituteInPlace ./configure --replace /usr/bin/file ${file}/bin/file";
+
+  buildInputs = [ pkgconfig gtk3 glib webkitgtk intltool itstool libxml2 libxslt icu file
+                  gnome3.gsettings_desktop_schemas makeWrapper gnome3.yelp_xsl ];
+
+  installFlags = "gsettingsschemadir=\${out}/share/${name}/glib-2.0/schemas/";
+
+  postInstall = ''
+    wrapProgram "$out/bin/yelp" \
+      --prefix XDG_DATA_DIRS : "${gtk3}/share:${gnome3.gnome_themes_standard}/share:${gnome3.gsettings_desktop_schemas}/share:$out/share:$out/share/${name}"
+  '';
+
+  preFixup = ''
+  '';
+
+  meta = with stdenv.lib; {
+    homepage = https://wiki.gnome.org/Apps/Yelp;
+    description = "Yelp is the help viewer in Gnome.";
+    maintainers = with maintainers; [ lethalman ];
+    license = licenses.gpl2;
+    platforms = platforms.linux;
+  };
+}

pkgs/desktops/gnome-3/default.nix

@@ -84,6 +84,8 @@ rec {
 
   vte = callPackage ./core/vte { };
 
+  yelp = callPackage ./core/yelp { };
+
   yelp_xsl = callPackage ./core/yelp-xsl { };
 
   zenity = callPackage ./core/zenity { };

pkgs/top-level/all-packages.nix

@@ -9235,6 +9235,8 @@ let
 
   yate = callPackage ../applications/misc/yate { };
 
+  inherit (gnome3) yelp;
+
   qgis = callPackage ../applications/misc/qgis {};
 
   ykpers = callPackage ../applications/misc/ykpers {};