make cmake-3.2 the default version

pkgs/development/libraries/jsoncpp/1.6.nix

···
     sha256 = "0ff1niks3y41gr6z13q9m391na70abqyi9rj4z3y2fz69cwm6sgz";
   };
 
-  nativeBuildInputs = [ cmake python ];
+  nativeBuildInputs =
+    [
+      # cmake can be built with the system jsoncpp, or its own bundled version.
+      # Obviously we cannot build it against the system jsoncpp that doesn't yet exist, so
+      # we make a bootstrapping build with the bundled version.
+      (cmake.override { jsoncpp = null; })
+      python
+    ];
 
   meta = {
     inherit version;

pkgs/development/libraries/kde-frameworks-5.7/default.nix

···
     (with pkgs;
       {
         Boost = boost155;
-        cmake = cmake-3_2;
-        inherit epoxy;
+        inherit cmake epoxy;
         GIF = giflib;
         GLIB2 = glib;
         Gpgme = gpgme;

pkgs/development/tools/build-managers/cmake/3.2.nix pkgs/development/tools/build-managers/cmake/2.8.nix

···
-{ stdenv, fetchurl
-, bzip2, curl, expat, jsoncpp, libarchive, xz, zlib
-, useNcurses ? false, ncurses, useQt4 ? false, qt4
+{ stdenv, fetchurl, fetchpatch, replace, curl, expat, zlib, bzip2, libarchive
+, useNcurses ? false, ncurses, useQt4 ? false, qt4, wantPS ? false, ps ? null
 }:
 
 with stdenv.lib;
 
+assert wantPS -> (ps != null);
+
 let
   os = stdenv.lib.optionalString;
-  majorVersion = "3.2";
-  minorVersion = "1";
+  majorVersion = "2.8";
+  minorVersion = "12.2";
   version = "${majorVersion}.${minorVersion}";
 in
 
···
 
   src = fetchurl {
     url = "${meta.homepage}files/v${majorVersion}/cmake-${version}.tar.gz";
-    sha256 = "0b2hy4p0aa9zshlxyw9nmlh5q8q1lmnwmb594rvh6sx2n7v1r7vm";
+    sha256 = "0phf295a9cby0v7zqdswr238v5aiy3rb2fs6dz39zjxbmzlp8rcc";
   };
 
   enableParallelBuilding = true;
 
   patches =
+    [(fetchpatch { # see http://www.cmake.org/Bug/view.php?id=13959
+      name = "FindFreetype-2.5.patch";
+      url = "http://www.cmake.org/Bug/file_download.php?file_id=4660&type=bug";
+      sha256 = "136z63ff83hnwd247cq4m8m8164pklzyl5i2csf5h6wd8p01pdkj";
+    })] ++
     # Don't search in non-Nix locations such as /usr, but do search in
-    # Nixpkgs' Glibc.
-    optional (stdenv ? glibc) ./search-path-3.0.patch ++
+    # Nixpkgs' Glibc. 
+    optional (stdenv ? glibc) ./search-path.patch ++
     optional (stdenv ? cross) (fetchurl {
       name = "fix-darwin-cross-compile.patch";
       url = "http://public.kitware.com/Bug/file_download.php?"
···
       sha256 = "16acmdr27adma7gs9rs0dxdiqppm15vl3vv3agy7y8s94wyh4ybv";
     });
 
-  buildInputs =
-    [ bzip2 curl expat jsoncpp libarchive xz zlib ]
+  buildInputs = [ curl expat zlib bzip2 libarchive ]
     ++ optional useNcurses ncurses
     ++ optional useQt4 qt4;
 
+  propagatedBuildInputs = optional wantPS ps;
+
   CMAKE_PREFIX_PATH = stdenv.lib.concatStringsSep ":" buildInputs;
-
+  
   configureFlags =
     "--docdir=/share/doc/${name} --mandir=/share/man --system-libs"
     + stdenv.lib.optionalString useQt4 " --qt-gui";
···
     ''
       source $setupHook
       fixCmakeFiles .
-      substituteInPlace Modules/Platform/UnixPaths.cmake \
-        --subst-var-by glibc ${stdenv.glibc}
+      substituteInPlace Modules/Platform/UnixPaths.cmake --subst-var-by glibc ${stdenv.glibc}
     '';
 
   meta = {
     homepage = http://www.cmake.org/;
     description = "Cross-Platform Makefile Generator";
     platforms = if useQt4 then qt4.meta.platforms else stdenv.lib.platforms.all;
-    maintainers = with stdenv.lib.maintainers; [ urkud mornfall ttuegel ];
+    maintainers = with stdenv.lib.maintainers; [ urkud mornfall ];
   };
 }

pkgs/development/tools/build-managers/cmake/default.nix

···
-{ stdenv, fetchurl, fetchpatch, replace, curl, expat, zlib, bzip2, libarchive
-, useNcurses ? false, ncurses, useQt4 ? false, qt4, wantPS ? false, ps ? null
+{ stdenv, fetchurl
+, bzip2, curl, expat, jsoncpp, libarchive, xz, zlib
+, useNcurses ? false, ncurses, useQt4 ? false, qt4
 }:
 
 with stdenv.lib;
 
-assert wantPS -> (ps != null);
-
 let
   os = stdenv.lib.optionalString;
-  majorVersion = "2.8";
-  minorVersion = "12.2";
+  majorVersion = "3.2";
+  minorVersion = "1";
   version = "${majorVersion}.${minorVersion}";
 in
 
···
 
   src = fetchurl {
     url = "${meta.homepage}files/v${majorVersion}/cmake-${version}.tar.gz";
-    sha256 = "0phf295a9cby0v7zqdswr238v5aiy3rb2fs6dz39zjxbmzlp8rcc";
+    sha256 = "0b2hy4p0aa9zshlxyw9nmlh5q8q1lmnwmb594rvh6sx2n7v1r7vm";
   };
 
   enableParallelBuilding = true;
 
   patches =
-    [(fetchpatch { # see http://www.cmake.org/Bug/view.php?id=13959
-      name = "FindFreetype-2.5.patch";
-      url = "http://www.cmake.org/Bug/file_download.php?file_id=4660&type=bug";
-      sha256 = "136z63ff83hnwd247cq4m8m8164pklzyl5i2csf5h6wd8p01pdkj";
-    })] ++
     # Don't search in non-Nix locations such as /usr, but do search in
-    # Nixpkgs' Glibc. 
-    optional (stdenv ? glibc) ./search-path.patch ++
+    # Nixpkgs' Glibc.
+    optional (stdenv ? glibc) ./search-path-3.0.patch ++
     optional (stdenv ? cross) (fetchurl {
       name = "fix-darwin-cross-compile.patch";
       url = "http://public.kitware.com/Bug/file_download.php?"
···
       sha256 = "16acmdr27adma7gs9rs0dxdiqppm15vl3vv3agy7y8s94wyh4ybv";
     });
 
-  buildInputs = [ curl expat zlib bzip2 libarchive ]
+  buildInputs =
+    [ bzip2 curl expat libarchive xz zlib ]
+    ++ optional (jsoncpp != null) jsoncpp
     ++ optional useNcurses ncurses
     ++ optional useQt4 qt4;
 
-  propagatedBuildInputs = optional wantPS ps;
+  CMAKE_PREFIX_PATH = stdenv.lib.concatStringsSep ":" buildInputs;
 
-  CMAKE_PREFIX_PATH = stdenv.lib.concatStringsSep ":" buildInputs;
-  
   configureFlags =
-    "--docdir=/share/doc/${name} --mandir=/share/man --system-libs"
-    + stdenv.lib.optionalString useQt4 " --qt-gui";
+    [
+      "--docdir=/share/doc/${name}"
+      "--mandir=/share/man"
+      "--system-libs"
+    ]
+    ++ optional (jsoncpp == null) "--no-system-jsoncpp"
+    ++ optional useQt4 "--qt-gui";
 
   setupHook = ./setup-hook.sh;
 
···
     ''
       source $setupHook
       fixCmakeFiles .
-      substituteInPlace Modules/Platform/UnixPaths.cmake --subst-var-by glibc ${stdenv.glibc}
+      substituteInPlace Modules/Platform/UnixPaths.cmake \
+        --subst-var-by glibc ${stdenv.glibc}
     '';
 
   meta = {
     homepage = http://www.cmake.org/;
     description = "Cross-Platform Makefile Generator";
     platforms = if useQt4 then qt4.meta.platforms else stdenv.lib.platforms.all;
-    maintainers = with stdenv.lib.maintainers; [ urkud mornfall ];
+    maintainers = with stdenv.lib.maintainers; [ urkud mornfall ttuegel ];
   };
 }

pkgs/top-level/all-packages.nix

···
 
   ctodo = callPackage ../applications/misc/ctodo { };
 
-  cmake = callPackage ../development/tools/build-managers/cmake {
+  cmake-2_8 = callPackage ../development/tools/build-managers/cmake/2.8.nix {
     wantPS = stdenv.isDarwin;
     ps     = if stdenv.isDarwin then darwin.ps else null;
   };
 
-  cmake-3_2 = callPackage ../development/tools/build-managers/cmake/3.2.nix {
+  cmake = callPackage ../development/tools/build-managers/cmake {
     jsoncpp = jsoncpp-1_6;
   };
   cmake-3_0 = callPackage ../development/tools/build-managers/cmake/3.0.nix { };
···
 
   giblib = callPackage ../development/libraries/giblib { };
 
-  libgit2 = callPackage ../development/libraries/git2 { cmake = cmake-3_2; };
+  libgit2 = callPackage ../development/libraries/git2 {};
 
   glew = callPackage ../development/libraries/glew { };
 
···
   kdeApps_14_12 = recurseIntoAttrs (callPackage ../applications/kde-apps-14.12 {
     kf5 = kf57;
     qt5 = qt54;
-    pkgs = pkgs // {
-      cmake = cmake-3_2;
-    };
+    inherit pkgs;
     kde4 = kde4.override { inherit (kdeApps_14_12) kdelibs; };
   });
   kdeApps_stable = kdeApps_14_12;
···
     }) ../desktops/kde-4.14;
 
   kdePackagesFor = self: dir:
-    let callPackageOrig = newScope { cmake = cmake-3_2; }; in
+    let callPackageOrig = newScope {}; in
     let
-      callPackage = newScope (self // { cmake = cmake-3_2; });
+      callPackage = newScope self;
       kde4 = callPackageOrig dir {
         inherit callPackage callPackageOrig;
         kdelibs = kdeApps_stable.kdelibs;