From 41e4f1a2109cc03008ef0d1db5cab1c9345866e3 Mon Sep 17 00:00:00 2001
From: Alex Neundorf <neundorf@kde.org>
Date: Tue, 28 Sep 2010 22:09:14 +0200
Subject: Add automatic variable CMAKE_CURRENT_LIST_DIR(dir of
 CMAKE_CURRENT_LIST_FILE)

Comes with a simple test and docs.

Alex
---
 Source/cmDocumentVariables.cxx        | 19 +++++++++++++++++++
 Source/cmMakefile.cxx                 |  6 ++++++
 Tests/CMakeTests/IncludeTest.cmake.in |  4 ++++
 3 files changed, 29 insertions(+)

diff --git a/Source/cmDocumentVariables.cxx b/Source/cmDocumentVariables.cxx
index a1fb064..a877680 100644
--- a/Source/cmDocumentVariables.cxx
+++ b/Source/cmDocumentVariables.cxx
@@ -78,6 +78,25 @@ void cmDocumentVariables::DefineVariables(cmake* cm)
      "Variables that Provide Information");
 
   cm->DefineProperty
+    ("CMAKE_CURRENT_LIST_DIR", cmProperty::VARIABLE,
+     "Full directory of the listfile currently being processed.",
+     "As CMake processes the listfiles in your project this "
+     "variable will always be set to the directory where the listfile which "
+     "is currently being processed (CMAKE_CURRENT_LIST_FILE) is located.  "
+     "The value has dynamic scope.  "
+     "When CMake starts processing commands in a source file "
+     "it sets this variable to the directory where this file is located.  "
+     "When CMake finishes processing commands from the file it "
+     "restores the previous value.  "
+     "Therefore the value of the variable inside a macro or "
+     "function is the directory of the file invoking the bottom-most entry on "
+     "the call stack, not the directory of the file containing the macro or "
+     "function definition."
+     "\n"
+     "See also CMAKE_CURRENT_LIST_FILE.",false,
+     "Variables that Provide Information");
+
+  cm->DefineProperty
     ("CMAKE_BUILD_TOOL", cmProperty::VARIABLE,
      "Tool used for the actual build process.",
      "This variable is set to the program that will be"
diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index a69fee7..e32619a 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -610,6 +610,8 @@ bool cmMakefile::ReadListFile(const char* filename_in,
     }
 
   this->AddDefinition("CMAKE_CURRENT_LIST_FILE", filenametoread);
+  this->AddDefinition("CMAKE_CURRENT_LIST_DIR",
+                       cmSystemTools::GetFilenamePath(filenametoread).c_str());
 
   // try to see if the list file is the top most
   // list file for a project, and if it is, then it
@@ -643,6 +645,8 @@ bool cmMakefile::ReadListFile(const char* filename_in,
       }
     this->AddDefinition("CMAKE_PARENT_LIST_FILE", currentParentFile.c_str());
     this->AddDefinition("CMAKE_CURRENT_LIST_FILE", currentFile.c_str());
+    this->AddDefinition("CMAKE_CURRENT_LIST_DIR",
+                        cmSystemTools::GetFilenamePath(currentFile).c_str());
     return false;
     }
   // add this list file to the list of dependencies
@@ -683,6 +687,8 @@ bool cmMakefile::ReadListFile(const char* filename_in,
 
   this->AddDefinition("CMAKE_PARENT_LIST_FILE", currentParentFile.c_str());
   this->AddDefinition("CMAKE_CURRENT_LIST_FILE", currentFile.c_str());
+  this->AddDefinition("CMAKE_CURRENT_LIST_DIR",
+                      cmSystemTools::GetFilenamePath(currentFile).c_str());
 
   // pop the listfile off the stack
   this->ListFileStack.pop_back();
diff --git a/Tests/CMakeTests/IncludeTest.cmake.in b/Tests/CMakeTests/IncludeTest.cmake.in
index 01cec38..eca679b 100644
--- a/Tests/CMakeTests/IncludeTest.cmake.in
+++ b/Tests/CMakeTests/IncludeTest.cmake.in
@@ -35,3 +35,7 @@ if(NOT "${fileOne}"   STREQUAL "${fileTwo}")
    message(FATAL_ERROR "Wrong CMake.cmake was included: \"${fileOne}\" expected \"${fileTwo}\"")
 endif(NOT "${fileOne}"   STREQUAL "${fileTwo}")
 
+# Check that CMAKE_CURRENT_LIST_DIR is working:
+# Needs to be a file in the build tree, which is correct cmake script
+# but doesn't do a lot, if possible only set() commands:
+include(${CMAKE_CURRENT_LIST_DIR}/../../CTestCustom.cmake)
-- 
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