cmState: Compute and store directory components.

There is no need to duplicate these in all cmLocalGenerators.

Rename the symbols according to current conventions.

Add explicit calls to Set{Source,Binary}Directory with empty strings
in order to trigger the population of the components containers with
the current working directory in cmLocalGenerator.  Having
directories set to empty is a special case in CMake, which is relied
on for the `if(CMAKE_BINARY_DIR)` condition at the end of
CMakeDetermineSystem.cmake.

2 files changed, 4 insertions, 0 deletions

diff --git a/Source/CPack/cmCPackGenerator.cxx b/Source/CPack/cmCPackGenerator.cxx
index e254e9a..f8a531c 100644
--- a/Source/CPack/cmCPackGenerator.cxx
+++ b/Source/CPack/cmCPackGenerator.cxx
@@ -711,6 +711,8 @@ int cmCPackGenerator::InstallProjectViaInstallCMakeProjects(
           }
 
         cmake cm;
+        cm.SetHomeDirectory("");
+        cm.SetHomeOutputDirectory("");
         cm.AddCMakePaths();
         cm.SetProgressCallback(cmCPackGeneratorProgress, this);
         cmGlobalGenerator gg;
diff --git a/Source/CPack/cpack.cxx b/Source/CPack/cpack.cxx
index 2207873..d08b5de 100644
--- a/Source/CPack/cpack.cxx
+++ b/Source/CPack/cpack.cxx
@@ -198,6 +198,8 @@ int main (int argc, char const* const* argv)
     "Read CPack config file: " << cpackConfigFile << std::endl);
 
   cmake cminst;
+  cminst.SetHomeDirectory("");
+  cminst.SetHomeOutputDirectory("");
   cminst.GetState()->RemoveUnscriptableCommands();
   cmGlobalGenerator cmgg;
   cmgg.SetCMakeInstance(&cminst);