Refactor internal resource location APIs and initialization

Rename cmSystemTools::FindExecutableDirectory to FindCMakeResources.
Teach it to compute the locations of cmake, ctest, cpack, ccmake, and
cmake-gui executables, and the location of CMAKE_ROOT.  Provide this
information from static cmSystemTools::Get<resource>() methods.
Refactor code that needs these locations to use the new APIs.

Teach FindCMakeResources to use the OS X system API to lookup the
executable location.  When running from the CMake build tree itself,
leave a file in the tree that FindCMakeResources can use to read the
location of the source tree.  This avoids the need to compile the source
tree location into a binary that may be installed and used without the
source tree.

Teach the QtDialog on OS X to create a "cmake-gui" symlink in the build
tree next to "cmake" and the other tools, as is already done in the
install tree for the application bundle.  This ensures a consistent set
of executables are available in one directory.

1 files changed, 10 insertions, 7 deletions

diff --git a/Source/cmSystemTools.h b/Source/cmSystemTools.h
index 07235da..69f6381 100644
--- a/Source/cmSystemTools.h
+++ b/Source/cmSystemTools.h
@@ -406,13 +406,16 @@ public:
   /** Random seed generation.  */
   static unsigned int RandomSeed();
 
-  /** Find the directory containing the running executable.  Save it
-   in a global location to be queried by GetExecutableDirectory
-   later.  */
-  static void FindExecutableDirectory(const char* argv0);
-
-  /** Get the directory containing the currently running executable.  */
-  static const char* GetExecutableDirectory();
+  /** Find the directory containing CMake executables.  */
+  static void FindCMakeResources(const char* argv0);
+
+  /** Get the CMake resource paths, after FindCMakeResources.  */
+  static std::string const& GetCTestCommand();
+  static std::string const& GetCPackCommand();
+  static std::string const& GetCMakeCommand();
+  static std::string const& GetCMakeGUICommand();
+  static std::string const& GetCMakeCursesCommand();
+  static std::string const& GetCMakeRoot();
 
 #if defined(CMAKE_BUILD_WITH_CMAKE)
   /** Echo a message in color using KWSys's Terminal cprintf.  */