ENH: Further refinement of the CPack components functionality from Doug Gregor.

Details:
==========

 - New cpack_add_component, cpack_add_component_group, and
cpack_add_install_type "commands" defined as macros in the CPack
module.
 - Documentation for all of the variables and commands in the CPack module.
 - Added get_cmake_property(... COMPONENTS) to CMake to ask for the
names of all components. Used in the CPack module to automatically
build component-based installers. (Set CPACK_MONOLITHIC_INSTALL to
turn off component-based installation).
 - A group can declare its PARENT_GROUP, to build an arbitrary
hierarchy of groups.
 - New CPack command cpack_configure_downloads, which creates an
installer that downloads only the selected components on-the-fly.
Those components marked DOWNLOADED will be separate packages
downloaded on-the-fly (or, all packages can be marked as such with the
ALL option to cpack_configure_downloads). Individual components are
compressed with ZIP at installer-creation time and
downloaded/uncompressed by the installer as needed. This feature is
only available on Windows with NSIS at the moment.
 - NSIS installers can install themselves and enable the "Change"
button in Add/Remove programs, allowing users to go back and install
or remove components. This can be disabled through
cpack_configure_downloads, because it's only really useful is most of
the application's functionality is in downloaded components.
 - Bug fix: automatically install everything whose COMPONENT was not
specified (it's a hidden, required group)
 - Bug fix: fixed removal of components when re-running the NSIS
installer and unchecking components
 - Bug fix: NSIS installers now only install/remove the minimal
number of files when re-run to update the installation (or by clicking
"Change" in Add/Remove programs)

1 files changed, 4 insertions, 1 deletions

diff --git a/Source/cmInstallProgramsCommand.cxx b/Source/cmInstallProgramsCommand.cxx
index 6a55f17..d7557d0 100644
--- a/Source/cmInstallProgramsCommand.cxx
+++ b/Source/cmInstallProgramsCommand.cxx
@@ -38,6 +38,9 @@ bool cmInstallProgramsCommand
     this->FinalArgs.push_back(*s);
     }  
   
+  this->Makefile->GetLocalGenerator()->GetGlobalGenerator()
+                       ->AddInstallComponent("Unspecified");
+
   return true;
 }
 
@@ -87,7 +90,7 @@ void cmInstallProgramsCommand::FinalPass()
   // Use a file install generator.
   const char* no_permissions = "";
   const char* no_rename = "";
-  const char* no_component = "";
+  const char* no_component = "Unspecified";
   std::vector<std::string> no_configurations;
   this->Makefile->AddInstallGenerator(
     new cmInstallFilesGenerator(this->Files,