qtcreator: Make the qt package optional and introduce the QtSDK

To give the ability to use a different Qt version than the default one
(which can build 3 different times Qt Libraries if we mixed the default
one, the qtcreator one and the version including all the examples and the
docs).

Right now a developer can choose to directly install the QtSDK which
includes a "full" (developerBuild + docs + examples) Qt version and uses
it to build QtCreator.

The possibility to only install QtCreator and its previous behavior has
been kept for flexibility purposes (we do not need to force someone on the
SDK approach).

pkgs/development/libraries/qt-4.x/4.8/default.nix

@@ -33,6 +33,9 @@ stdenv.mkDerivation rec {
     sha256 = "0f51dbgn1dcck8pqimls2qyf1pfmsmyknh767cvw87c3d218ywpb";
   };
 
+  # The version property must be kept because it will be included into the QtSDK package name
+  version = vers;
+
   prePatch = ''
     substituteInPlace configure --replace /bin/pwd pwd
     substituteInPlace src/corelib/global/global.pri --replace /bin/ls ${coreutils}/bin/ls

pkgs/development/qtcreator/default.nix

@@ -1,30 +1,39 @@
-{ stdenv, fetchurl, qt48 }:
+{ stdenv, fetchurl, qtLib, sdkBuild ? false }:
+
+with stdenv.lib;
 
 let
   baseVersion = "2.8";
   revision = "1";
   version = "${baseVersion}.${revision}";
-  qt4_for_qtcreator = qt48.override {
-    developerBuild = true;
-  };
 in
 
 stdenv.mkDerivation rec {
-  name = "qtcreator-${version}";
+  # The package name depends on wether we are just building the QtCreator package or the whole Qt SDK
+  # If we are building the QtCreator package: qtcreator-version
+  # If we are building the QtSDK package, the Qt version is also included: qtsdk-version-qt-version
+  name = "qt${if sdkBuild then "sdk" else "creator"}-${version}"
+    + optionalString sdkBuild "-qt-${qtLib.version}";
 
   src = fetchurl {
     url = "http://download.qt-project.org/official_releases/qtcreator/${baseVersion}/${version}/qt-creator-${version}-src.tar.gz";
     sha256 = "d5ae007a297a4288d0e95fd605edbfb8aee80f6788c7a6cfb9cb297f50c364b9";
   };
 
-  buildInputs = [ qt4_for_qtcreator ];
+  # This property can be used in a nix development environment to refer to the Qt package
+  # eg: export QTDIR=${qtSDK.qt}
+  qt = qtLib;
+
+  # We must only propagate Qt (including qmake) when building the QtSDK
+  propagatedBuildInputs = if sdkBuild then [ qtLib ] else [];
+  buildInputs = if sdkBuild == false then [ qtLib ] else [];
 
   doCheck = false;
 
   enableParallelBuilding = true;
 
   preConfigure = ''
-    qmake -spec linux-g++ "QT_PRIVATE_HEADERS=${qt4_for_qtcreator}/include" qtcreator.pro
+    qmake -spec linux-g++ "QT_PRIVATE_HEADERS=${qtLib}/include" qtcreator.pro
   '';
 
   installFlags = "INSTALL_ROOT=$(out)";
@@ -38,7 +47,7 @@ stdenv.mkDerivation rec {
     '';
     homepage = "http://qt-project.org/wiki/Category:Tools::QtCreator";
     license = "LGPL";
-    maintainers = [ stdenv.lib.maintainers.bbenoist ];
-    platforms = stdenv.lib.platforms.all;
+    maintainers = [ maintainers.bbenoist ];
+    platforms = platforms.all;
   };
 }

pkgs/top-level/all-packages.nix

@@ -5438,6 +5438,16 @@ let
     docs = true;
     demos = true;
     examples = true;
+    developerBuild = true;
+  };
+
+  qt4SDK = qtcreator.override {
+    sdkBuild = true;
+    qtLib = qt48Full;
+  };
+
+  qtcreator = callPackage ../development/qtcreator {
+    qtLib = qt48.override { developerBuild = true; };
   };
 
   qtscriptgenerator = callPackage ../development/libraries/qtscriptgenerator { };
@@ -8511,8 +8521,6 @@ let
 
   qsynth = callPackage ../applications/audio/qsynth { };
 
-  qtcreator = callPackage ../development/qtcreator { };
-
   qtpfsgui = callPackage ../applications/graphics/qtpfsgui { };
 
   qtractor = callPackage ../applications/audio/qtractor { };