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, 37 insertions, 0 deletions

diff --git a/Source/CPack/cmCPackGenerator.cxx b/Source/CPack/cmCPackGenerator.cxx
index f786f80..5090606 100644
--- a/Source/CPack/cmCPackGenerator.cxx
+++ b/Source/CPack/cmCPackGenerator.cxx
@@ -653,6 +653,14 @@ int cmCPackGenerator::InstallProjectViaInstallCMakeProjects(
             }
           mf->AddDefinition("CMAKE_INSTALL_PREFIX", dir.c_str());
 
+          if ( !cmsys::SystemTools::MakeDirectory(dir.c_str()))
+            {
+            cmCPackLogger(cmCPackLog::LOG_ERROR,
+                          "Problem creating temporary directory: " 
+                          << dir << std::endl);
+            return 0;
+            }
+
           cmCPackLogger(cmCPackLog::LOG_DEBUG,
                         "- Using DESTDIR + CPACK_INSTALL_PREFIX... (mf->AddDefinition)"
                         << std::endl);
@@ -664,6 +672,14 @@ int cmCPackGenerator::InstallProjectViaInstallCMakeProjects(
           {
           mf->AddDefinition("CMAKE_INSTALL_PREFIX", tempInstallDirectory.c_str());
 
+          if ( !cmsys::SystemTools::MakeDirectory(tempInstallDirectory.c_str()))
+            {
+            cmCPackLogger(cmCPackLog::LOG_ERROR,
+                          "Problem creating temporary directory: " 
+                          << tempInstallDirectory << std::endl);
+            return 0;
+            }
+
           cmCPackLogger(cmCPackLog::LOG_DEBUG,
                         "- Using non-DESTDIR install... (mf->AddDefinition)" << std::endl);
           cmCPackLogger(cmCPackLog::LOG_DEBUG,
@@ -1255,6 +1271,16 @@ cmCPackGenerator::GetComponent(const char *projectName, const char *name)
       = this->IsSet((macroPrefix + "_REQUIRED").c_str());
     component->IsDisabledByDefault
       = this->IsSet((macroPrefix + "_DISABLED").c_str());
+    component->IsDownloaded
+      = this->IsSet((macroPrefix + "_DOWNLOADED").c_str())
+        || cmSystemTools::IsOn(this->GetOption("CPACK_DOWNLOAD_ALL"));
+
+    const char* archiveFile = this->GetOption((macroPrefix + "_ARCHIVE_FILE").c_str());
+    if (archiveFile && *archiveFile)
+      {
+      component->ArchiveFile = archiveFile;
+      }
+
     const char* groupName = this->GetOption((macroPrefix + "_GROUP").c_str());
     if (groupName && *groupName) 
       {
@@ -1344,6 +1370,17 @@ cmCPackGenerator::GetComponentGroup(const char *projectName, const char *name)
       = this->IsSet((macroPrefix + "_BOLD_TITLE").c_str());
     group->IsExpandedByDefault
       = this->IsSet((macroPrefix + "_EXPANDED").c_str());
+    const char* parentGroupName 
+      = this->GetOption((macroPrefix + "_PARENT_GROUP").c_str());
+    if (parentGroupName && *parentGroupName)
+      {
+      group->ParentGroup = GetComponentGroup(projectName, parentGroupName);
+      group->ParentGroup->Subgroups.push_back(group);
+      }
+    else
+      {
+      group->ParentGroup = 0;
+      }
     }
   return group;
 }