kde installer: Add gparted, nixos manual and konsole in the desktop

nixos/modules/installer/cd-dvd/installation-cd-graphical.nix

@@ -11,6 +11,9 @@ with lib;
   # Provide wicd for easy wireless configuration.
   #networking.wicd.enable = true;
 
+  # Include gparted for partitioning disks
+  environment.systemPackages = [ pkgs.gparted ];
+  
   # KDE complains if power management is disabled (to be precise, if
   # there is no power management backend such as upower).
   powerManagement.enable = true;
@@ -27,4 +30,70 @@ with lib;
       AutoLoginUser=root
       AutoLoginPass=""
     '';
+
+  # Custom kde-workspace adding some icons on the desktop
+
+  system.activationScripts.installerDesktop = let
+    openManual = pkgs.writeScript "nixos-manual.sh" ''
+      #!${pkgs.stdenv.shell}
+      cd ${config.system.build.manual.manual}/share/doc/nixos/
+      konqueror ./index.html
+    '';
+
+    desktopFile = pkgs.writeText "nixos-manual.desktop" ''
+      [Desktop Entry]
+      Version=1.0
+      Type=Application
+      Name=NixOS Manual
+      Exec=${openManual}
+      Icon=konqueror
+    '';
+
+  in ''
+    mkdir -p /root/Desktop
+    ln -sfT ${desktopFile} /root/Desktop/nixos-manual.desktop
+    ln -sfT ${pkgs.kde4.konsole}/share/applications/kde4/konsole.desktop /root/Desktop/konsole.desktop
+    ln -sfT ${pkgs.gparted}/share/applications/gparted.desktop /root/Desktop/gparted.desktop
+  '';
+
+  services.xserver.desktopManager.kde4.kdeWorkspacePackage = let
+    pkg = pkgs.kde4.kde_workspace;
+
+    plasmaInit = pkgs.writeText "00-defaultLayout.js" ''
+      loadTemplate("org.kde.plasma-desktop.defaultPanel")
+
+      for (var i = 0; i < screenCount; ++i) {
+      	var desktop = new Activity
+        desktop.name = i18n("Desktop")
+        desktop.screen = i
+        desktop.wallpaperPlugin = 'image'
+        desktop.wallpaperMode = 'SingleImage'
+
+        var folderview = desktop.addWidget("folderview");
+        folderview.writeConfig("url", "desktop:/");
+        
+        //Create more panels for other screens
+        if (i > 0){
+          var panel = new Panel
+          panel.screen = i
+          panel.location = 'bottom'
+          panel.height = screenGeometry(i).height > 1024 ? 35 : 27
+          var tasks = panel.addWidget("tasks")
+          tasks.writeConfig("showOnlyCurrentScreen", true);
+        }
+      }
+    '';
+
+  in
+    pkgs.stdenv.mkDerivation {
+      inherit (pkg) name meta;
+
+      buildCommand = ''
+        mkdir -p $out
+        cp -prf ${pkg}/* $out/
+        chmod a+w $out/share/apps/plasma-desktop/init
+        cp -f ${plasmaInit} $out/share/apps/plasma-desktop/init/00-defaultLayout.js
+      '';
+    };
+
 }

nixos/modules/services/x11/desktop-managers/kde4.nix

@@ -7,6 +7,7 @@ let
   xcfg = config.services.xserver;
   cfg = xcfg.desktopManager.kde4;
   xorg = pkgs.xorg;
+  kde_workspace = config.services.xserver.desktopManager.kde4.kdeWorkspacePackage;
 
   # Disable Nepomuk and Strigi by default.  As of KDE 4.7, they don't
   # really work very well (e.g. searching files often fails to find
@@ -61,6 +62,13 @@ in
         example = ["gstreamer" "vlc"];
         description = "Which phonon multimedia backend kde should use";
       };
+
+      kdeWorkspacePackage = mkOption {
+        internal = true;
+        default = pkgs.kde4.kde_workspace;
+        type = types.package;
+        description = "Custom kde-workspace, used for NixOS rebranding.";
+      };
     };
 
     environment.kdePackages = mkOption {
@@ -108,13 +116,13 @@ in
             fi
 
             # Start KDE.
-            exec ${pkgs.kde4.kdebase_workspace}/bin/startkde
+            exec ${kde_workspace}/bin/startkde
           '';
       };
 
     security.setuidOwners = singleton
       { program = "kcheckpass";
-        source = "${pkgs.kde4.kdebase_workspace}/lib/kde4/libexec/kcheckpass";
+        source = "${kde_workspace}/lib/kde4/libexec/kcheckpass";
         owner = "root";
         group = "root";
         setuid = true;
@@ -124,7 +132,7 @@ in
         [ pkgs.kde4.kdelibs
 
           pkgs.kde4.kde_baseapps # Splitted kdebase
-          pkgs.kde4.kde_workspace
+          kde_workspace
           pkgs.kde4.kde_runtime
           pkgs.kde4.konsole
           pkgs.kde4.kate