gnuplot: Reduce dependency bloat a bit

pkgs/tools/graphics/gnuplot/default.nix

@@ -1,25 +1,24 @@
-{ stdenv, fetchurl, zlib, gd, texinfo, makeWrapper, readline
-, texLive ? null
-, lua ? null
+{ lib, stdenv, fetchurl, zlib, gd, texinfo4, makeWrapper, readline
+, withTeXLive ? false, texLive
+, withLua ? false, lua
 , emacs ? null
 , libX11 ? null
 , libXt ? null
 , libXpm ? null
 , libXaw ? null
 , aquaterm ? false
-, wxGTK ? null
+, withWxGTK ? false, wxGTK ? null
 , pango ? null
 , cairo ? null
 , pkgconfig ? null
 , fontconfig ? null
 , gnused ? null
 , coreutils ? null
-, qt ? null }:
+, withQt ? false, qt4 }:
 
 assert libX11 != null -> (fontconfig != null && gnused != null && coreutils != null);
 let
   withX = libX11 != null && !aquaterm;
-  withQt = qt != null;
 in
 stdenv.mkDerivation rec {
   name = "gnuplot-4.6.5";
@@ -30,20 +29,21 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs =
-    [ zlib gd texinfo readline emacs lua texLive
+    [ zlib gd texinfo4 readline
       pango cairo pkgconfig makeWrapper ]
-    ++ stdenv.lib.optionals withX              [ libX11 libXpm libXt libXaw ]
-    ++ stdenv.lib.optional withQt [ qt ]
+    ++ lib.optional withTeXLive texLive
+    ++ lib.optional withLua lua
+    ++ lib.optionals withX [ libX11 libXpm libXt libXaw ]
+    ++ lib.optional withQt [ qt4 ]
     # compiling with wxGTK causes a malloc (double free) error on darwin
-    ++ stdenv.lib.optional (!stdenv.isDarwin) wxGTK;
+    ++ lib.optional (withWxGTK && !stdenv.isDarwin) wxGTK;
 
   configureFlags =
     (if withX then ["--with-x"] else ["--without-x"])
     ++ (if withQt then ["--enable-qt"] else ["--disable-qt"])
-    ++ (if aquaterm then ["--with-aquaterm"] else ["--without-aquaterm"])
-    ;
+    ++ (if aquaterm then ["--with-aquaterm"] else ["--without-aquaterm"]);
 
-  postInstall = stdenv.lib.optionalString withX ''
+  postInstall = lib.optionalString withX ''
     wrapProgram $out/bin/gnuplot \
        --prefix PATH : '${gnused}/bin' \
        --prefix PATH : '${coreutils}/bin' \
@@ -51,8 +51,8 @@ stdenv.mkDerivation rec {
        --run '. ${./set-gdfontpath-from-fontconfig.sh}'
   '';
 
-  meta = with stdenv.lib; {
-    homepage    = http://www.gnuplot.info;
+  meta = with lib; {
+    homepage = http://www.gnuplot.info/;
     description = "A portable command-line driven graphing utility for many platforms";
     hydraPlatforms = platforms.linux ++ platforms.darwin;
     maintainers = with maintainers; [ lovek323 ];

pkgs/top-level/all-packages.nix

@@ -1153,17 +1153,13 @@ let
   });
 
   gnuplot = callPackage ../tools/graphics/gnuplot {
-    texLive = null;
-    lua = null;
-    texinfo = texinfo4; # build errors with gnuplot-4.6.3
-
     # use gccApple to compile on darwin, seems to resolve a malloc error
     stdenv = if stdenv.isDarwin
       then stdenvAdapters.overrideGCC stdenv gccApple
       else stdenv;
   };
 
-  gnuplot_qt = gnuplot.override { qt = qt4; };
+  gnuplot_qt = gnuplot.override { withQt = true; };
 
   # must have AquaTerm installed separately
   gnuplot_aquaterm = gnuplot.override { aquaterm = true; };