ENH: Refactor cmFindCommon, cmFindBase, and cmFindPackageCommand

  - Add each part of the search order in a separate method.
  - Collect added paths in an ivar in cmFindCommon.
  - Move user path storage up to cmFindCommon and share
    between cmFindBase and cmFindPackageCommand.
  - Expand user path registry values up in cmFindCommon
    - Enables 32-/64-bit registry view for find_package
    - Disables registry expansion for paths not specified
      with the PATHS argument, which is not expected.

6 files changed, 247 insertions, 301 deletions

diff --git a/Source/cmFindBase.cxx b/Source/cmFindBase.cxx
index ccc20a9..0b431bf 100644
--- a/Source/cmFindBase.cxx
+++ b/Source/cmFindBase.cxx
@@ -161,7 +161,6 @@ bool cmFindBase::ParseArguments(std::vector<std::string> const& argsIn)
   // Find the current bundle/framework search policy.
   this->SelectDefaultMacMode();
 
-  std::vector<std::string> userPaths;
   std::string doc;
   bool doingNames = true; // assume it starts with a name
   bool doingPaths = false;
@@ -213,8 +212,8 @@ bool cmFindBase::ParseArguments(std::vector<std::string> const& argsIn)
         this->Names.push_back(args[j]);
         }
       else if(doingPaths)
-        { 
-        userPaths.push_back(args[j]);
+        {
+        this->AddUserPath(args[j]);
         }
       else if(doingPathSuf)
         {
@@ -266,17 +265,17 @@ bool cmFindBase::ParseArguments(std::vector<std::string> const& argsIn)
     this->Names.push_back(args[1]);
     for(unsigned int j = 2; j < args.size(); ++j)
       {
-      userPaths.push_back(args[j]);
+      this->AddUserPath(args[j]);
       }
     }
-  this->ExpandPaths(userPaths);
+  this->ExpandPaths();
 
   // Handle search root stuff.
   this->RerootPaths(this->SearchPaths);
   return true;
 }
 
-void cmFindBase::ExpandPaths(std::vector<std::string> userPaths)
+void cmFindBase::ExpandPaths()
 {
   // if NO Default paths was not specified add the
   // standard search paths.
@@ -284,74 +283,36 @@ void cmFindBase::ExpandPaths(std::vector<std::string> userPaths)
     {
     if(this->SearchFrameworkFirst || this->SearchFrameworkOnly)
       {
-      this->AddFrameWorkPaths();
+      this->AddFrameworkPath();
       }
     if(this->SearchAppBundleFirst || this->SearchAppBundleOnly)
       {
-      this->AddAppBundlePaths();
-      }
-    if(!this->NoCMakeEnvironmentPath && 
-       !(this->SearchFrameworkOnly || this->SearchAppBundleOnly))
-      {
-      // Add CMAKE_*_PATH environment variables
-      this->AddEnvironmentVariables();
-      }
-    if(!this->NoCMakePath && 
-       !(this->SearchFrameworkOnly || this->SearchAppBundleOnly))
-      {
-      // Add CMake varibles of the same name as the previous environment
-      // varibles CMAKE_*_PATH to be used most of the time with -D
-      // command line options
-      this->AddCMakeVariables();
-      }
-    if(!this->NoSystemEnvironmentPath && 
-       !(this->SearchFrameworkOnly || this->SearchAppBundleOnly))
-      {
-      // add System environment PATH and (LIB or INCLUDE)
-      this->AddSystemEnvironmentVariables();
-      }
-    if(!this->NoCMakeSystemPath && 
-       !(this->SearchFrameworkOnly || this->SearchAppBundleOnly))
-      {
-      // Add CMAKE_SYSTEM_*_PATH variables which are defined in platform files
-      this->AddCMakeSystemVariables();
+      this->AddAppBundlePath();
       }
+    this->AddCMakeEnvironmentPath();
+    this->AddCMakeVariablePath();
+    this->AddSystemEnvironmentPath();
+    this->AddCMakeSystemVariablePath();
     if(this->SearchAppBundleLast)
       {
-      this->AddAppBundlePaths();
+      this->AddAppBundlePath();
       }
     if(this->SearchFrameworkLast)
       {
-      this->AddFrameWorkPaths();
+      this->AddFrameworkPath();
       }
     }
-  std::vector<std::string> paths;
-  // add the paths specified in the FIND_* call 
-  for(unsigned int i =0; i < userPaths.size(); ++i)
-    {
-    paths.push_back(userPaths[i]);
-    }
-  this->AddPaths(paths);
-}
 
-//----------------------------------------------------------------------------
-void cmFindBase::AddEnvironmentVariables()
-{ 
-  std::vector<std::string> paths;
-
-  std::vector<std::string> prefixPaths;
-  cmSystemTools::GetPath(prefixPaths, "CMAKE_PREFIX_PATH");
-  this->AddFindPrefix(paths, prefixPaths);
-
-  std::string var = "CMAKE_";
-  var += this->CMakePathName;
-  var += "_PATH";
-  cmSystemTools::GetPath(paths, var.c_str());
-  this->AddPaths(paths);
+  // Add paths specified by the caller.
+  this->AddPathsInternal(this->UserPaths, CMakePath);
+
+  // Add suffixes and clean up paths.
+  this->AddPathSuffixes();
 }
 
-void cmFindBase::AddFindPrefix(std::vector<std::string>& dest, 
-                               const std::vector<std::string>& src)
+//----------------------------------------------------------------------------
+void cmFindBase::AddPrefixPaths(std::vector<std::string> const& in_paths,
+                                PathType pathType)
 {
   // default for programs
   std::string subdir = "bin";
@@ -369,9 +330,8 @@ void cmFindBase::AddFindPrefix(std::vector<std::string>& dest,
     subdir = "";  // ? what to do for frameworks ?
     }
 
-  for (std::vector<std::string>::const_iterator it = src.begin();
-       it != src.end();
-       ++it)
+  for(std::vector<std::string>::const_iterator it = in_paths.begin();
+      it != in_paths.end(); ++it)
     {
     std::string dir = it->c_str();
     if(!subdir.empty() && !dir.empty() && dir[dir.size()-1] != '/')
@@ -381,131 +341,147 @@ void cmFindBase::AddFindPrefix(std::vector<std::string>& dest,
     std::string add = dir + subdir;
     if(add != "/")
       {
-      dest.push_back(add);
+      this->AddPathInternal(add, pathType);
       }
     if (subdir == "bin")
       {
-      dest.push_back(dir + "sbin");
+      this->AddPathInternal(dir+"sbin", pathType);
       }
     if(!subdir.empty() && *it != "/")
       {
-      dest.push_back(*it);
+      this->AddPathInternal(*it, pathType);
       }
     }
 }
 
-void cmFindBase::AddFrameWorkPaths()
+//----------------------------------------------------------------------------
+void cmFindBase::AddCMakePrefixPath(const char* variable)
 {
-  std::vector<std::string> paths;
-  this->GetFrameworkPaths(paths);
-  this->AddPaths(paths);
+  // Get a path from a CMake variable.
+  if(const char* varPath = this->Makefile->GetDefinition(variable))
+    {
+    std::vector<std::string> tmp;
+    cmSystemTools::ExpandListArgument(varPath, tmp);
+    this->AddPrefixPaths(tmp, CMakePath);
+    }
 }
 
-void cmFindBase::AddPaths(std::vector<std::string> & paths)
+//----------------------------------------------------------------------------
+void cmFindBase::AddEnvPrefixPath(const char* variable)
 {
-  // add suffixes and clean up paths
-  this->ExpandRegistryAndCleanPath(paths);
-  // add the paths to the search paths
-  this->SearchPaths.insert(this->SearchPaths.end(),
-                           paths.begin(),
-                           paths.end());
+  // Get a path from the environment.
+  std::vector<std::string> tmp;
+  cmSystemTools::GetPath(tmp, variable);
+  this->AddPrefixPaths(tmp, EnvPath);
 }
 
-void cmFindBase::AddAppBundlePaths()
+//----------------------------------------------------------------------------
+void cmFindBase::AddMacPath(const char* var, const char* sysvar)
 {
-  std::vector<std::string> paths;
-  this->GetAppBundlePaths(paths);
-  this->AddPaths(paths);
-}
+  if(this->NoDefaultPath)
+    {
+    return;
+    }
 
-void cmFindBase::AddCMakeVariables()
-{ 
-  std::string var = "CMAKE_";
-  var += this->CMakePathName;
-  var += "_PATH";
-  std::vector<std::string> paths;
+  // first environment variables
+  if(!this->NoCMakeEnvironmentPath)
+    {
+    this->AddEnvPath("CMAKE_FRAMEWORK_PATH");
+    }
 
-  if(const char* prefixPath = 
-      this->Makefile->GetDefinition("CMAKE_PREFIX_PATH"))
+  // add cmake variables
+  if(!this->NoCMakePath)
     {
-    std::vector<std::string> prefixPaths;
-    cmSystemTools::ExpandListArgument(prefixPath, prefixPaths);
-    this->AddFindPrefix(paths, prefixPaths);
+    this->AddCMakePath("CMAKE_FRAMEWORK_PATH");
     }
 
-  if(const char* path = this->Makefile->GetDefinition(var.c_str()))
+  // add cmake system variables
+  if(!this->NoCMakeSystemPath)
     {
-    cmSystemTools::ExpandListArgument(path, paths);
-    } 
-  this->AddPaths(paths);
+    this->AddCMakePath("CMAKE_SYSTEM_FRAMEWORK_PATH");
+    }
 }
 
-void cmFindBase::AddSystemEnvironmentVariables()
+//----------------------------------------------------------------------------
+void cmFindBase::AddFrameworkPath()
 {
-  // Add LIB or INCLUDE
-  std::vector<std::string> paths;
-  if(this->EnvironmentPath.size())
+  this->AddMacPath("CMAKE_FRAMEWORK_PATH", "CMAKE_SYSTEM_FRAMEWORK_PATH");
+}
+
+//----------------------------------------------------------------------------
+void cmFindBase::AddAppBundlePath()
+{
+  this->AddMacPath("CMAKE_APPBUNDLE_PATH", "CMAKE_SYSTEM_APPBUNDLE_PATH");
+}
+
+//----------------------------------------------------------------------------
+void cmFindBase::AddCMakeEnvironmentPath()
+{
+  if(!this->NoCMakeEnvironmentPath &&
+     !(this->SearchFrameworkOnly || this->SearchAppBundleOnly))
     {
-    cmSystemTools::GetPath(paths, this->EnvironmentPath.c_str());
+    // Add CMAKE_*_PATH environment variables
+    std::string var = "CMAKE_";
+    var += this->CMakePathName;
+    var += "_PATH";
+    this->AddEnvPrefixPath("CMAKE_PREFIX_PATH");
+    this->AddEnvPath(var.c_str());
     }
-  // Add PATH 
-  cmSystemTools::GetPath(paths);
-  this->AddPaths(paths);
 }
 
-void cmFindBase::AddCMakeSystemVariables()
-{  
-  std::string var = "CMAKE_SYSTEM_";
-  var += this->CMakePathName;
-  var += "_PATH";
-  std::vector<std::string> paths;
-  if(const char* prefixPath =
-      this->Makefile->GetDefinition("CMAKE_SYSTEM_PREFIX_PATH"))
+//----------------------------------------------------------------------------
+void cmFindBase::AddCMakeVariablePath()
+{
+  if(!this->NoCMakePath &&
+     !(this->SearchFrameworkOnly || this->SearchAppBundleOnly))
     {
-    std::vector<std::string> prefixPaths;
-    cmSystemTools::ExpandListArgument(prefixPath, prefixPaths);
-    this->AddFindPrefix(paths, prefixPaths);
+    // Add CMake varibles of the same name as the previous environment
+    // varibles CMAKE_*_PATH to be used most of the time with -D
+    // command line options
+    std::string var = "CMAKE_";
+    var += this->CMakePathName;
+    var += "_PATH";
+    this->AddCMakePrefixPath("CMAKE_PREFIX_PATH");
+    this->AddCMakePath(var.c_str());
     }
-  if(const char* path = this->Makefile->GetDefinition(var.c_str()))
-    {
-    cmSystemTools::ExpandListArgument(path, paths);
-    }  
-  this->AddPaths(paths);
 }
 
-void cmFindBase::ExpandRegistryAndCleanPath(std::vector<std::string>& paths)
+//----------------------------------------------------------------------------
+void cmFindBase::AddSystemEnvironmentPath()
 {
-  // We should view the registry as the target application would view
-  // it.
-  cmSystemTools::KeyWOW64 view = cmSystemTools::KeyWOW64_32;
-  cmSystemTools::KeyWOW64 other_view = cmSystemTools::KeyWOW64_64;
-  if(const char* psize =
-     this->Makefile->GetDefinition("CMAKE_SIZEOF_VOID_P"))
+  if(!this->NoSystemEnvironmentPath &&
+     !(this->SearchFrameworkOnly || this->SearchAppBundleOnly))
     {
-    if(atoi(psize) == 8)
+    // Add LIB or INCLUDE
+    if(!this->EnvironmentPath.empty())
       {
-      view = cmSystemTools::KeyWOW64_64;
-      other_view = cmSystemTools::KeyWOW64_32;
+      this->AddEnvPath(this->EnvironmentPath.c_str());
       }
+    // Add PATH
+    this->AddEnvPath(0);
     }
-  std::vector<std::string> finalPath;
-  std::vector<std::string>::iterator i;
-  // glob and expand registry stuff from paths and put
-  // into finalPath
-  for(i = paths.begin();
-      i != paths.end(); ++i)
+}
+
+//----------------------------------------------------------------------------
+void cmFindBase::AddCMakeSystemVariablePath()
+{
+  if(!this->NoCMakeSystemPath &&
+     !(this->SearchFrameworkOnly || this->SearchAppBundleOnly))
     {
-    std::string expanded = *i;
-    cmSystemTools::ExpandRegistryValues(expanded, view);
-    cmSystemTools::GlobDirs(expanded.c_str(), finalPath);
-    if(expanded != *i && this->CMakePathName == "PROGRAM")
-      {
-      // Executables can be either 32-bit or 64-bit.
-      expanded = *i;
-      cmSystemTools::ExpandRegistryValues(expanded, other_view);
-      cmSystemTools::GlobDirs(expanded.c_str(), finalPath);
-      }
+    std::string var = "CMAKE_SYSTEM_";
+    var += this->CMakePathName;
+    var += "_PATH";
+    this->AddCMakePrefixPath("CMAKE_SYSTEM_PREFIX_PATH");
+    this->AddCMakePath(var.c_str());
     }
+}
+
+//----------------------------------------------------------------------------
+void cmFindBase::AddPathSuffixes()
+{
+  std::vector<std::string>& paths = this->SearchPaths;
+  std::vector<std::string> finalPath = paths;
+  std::vector<std::string>::iterator i;
   // clear the path
   paths.clear();
   // convert all paths to unix slashes and add search path suffixes
diff --git a/Source/cmFindBase.h b/Source/cmFindBase.h
index 86a76f7..a678ccf 100644
--- a/Source/cmFindBase.h
+++ b/Source/cmFindBase.h
@@ -41,19 +41,9 @@ public:
 
 protected:
   void PrintFindStuff();
-  void ExpandPaths(std::vector<std::string> userPaths);
+  void ExpandPaths();
+  void AddPathSuffixes();
 
-  // add to the SearchPaths
-  void AddPaths(std::vector<std::string>& paths);
-  void AddFrameWorkPaths();
-  void AddAppBundlePaths();
-  void AddEnvironmentVariables();
-  void AddFindPrefix(std::vector<std::string>& dest, 
-                     const std::vector<std::string>& src);
-  void AddCMakeVariables();
-  void AddSystemEnvironmentVariables();
-  void AddCMakeSystemVariables();
-  void ExpandRegistryAndCleanPath(std::vector<std::string>& paths);
   // see if the VariableName is already set in the cache,
   // also copy the documentation from the cache to VariableDocumentation
   // if it has documentation in the cache
@@ -64,13 +54,27 @@ protected:
   cmStdString VariableDocumentation;
   cmStdString VariableName;
   std::vector<std::string> Names;
-  std::vector<std::string> SearchPaths;
 
   // CMAKE_*_PATH CMAKE_SYSTEM_*_PATH FRAMEWORK|LIBRARY|INCLUDE|PROGRAM
   cmStdString EnvironmentPath; // LIB,INCLUDE
 
   bool AlreadyInCache;
   bool AlreadyInCacheWithoutMetaInfo;
+private:
+  // Add pieces of the search.
+  void AddFrameworkPath();
+  void AddAppBundlePath();
+  void AddCMakeEnvironmentPath();
+  void AddCMakeVariablePath();
+  void AddSystemEnvironmentPath();
+  void AddCMakeSystemVariablePath();
+
+  // Helpers.
+  void AddMacPath(const char* var, const char* sysvar);
+  void AddCMakePrefixPath(const char* variable);
+  void AddEnvPrefixPath(const char* variable);
+  void AddPrefixPaths(std::vector<std::string> const& in_paths,
+                      PathType pathType);
 };
 
 
diff --git a/Source/cmFindCommon.cxx b/Source/cmFindCommon.cxx
index 0c6af0d..a82e611 100644
--- a/Source/cmFindCommon.cxx
+++ b/Source/cmFindCommon.cxx
@@ -322,93 +322,39 @@ void cmFindCommon::AddPathSuffix(std::string const& arg)
 }
 
 //----------------------------------------------------------------------------
-void cmFindCommon::GetAppBundlePaths(std::vector<std::string>& paths)
+void cmFindCommon::AddUserPath(std::string const& p)
 {
-  if(this->NoDefaultPath)
-    {
-    return;
-    }
-  std::vector<std::string> tmp;
-
-  // first environment variables
-  if(!this->NoCMakeEnvironmentPath)
-    {
-    cmSystemTools::GetPath(tmp, "CMAKE_APPBUNDLE_PATH");
-    this->AddPathsInternal(paths, tmp, EnvPath);
-    tmp.clear();
-    }
-
-  // add cmake variables
-  if(!this->NoCMakePath)
-    {
-    if(const char* path =
-       this->Makefile->GetDefinition("CMAKE_APPBUNDLE_PATH"))
+  // We should view the registry as the target application would view
+  // it.
+  cmSystemTools::KeyWOW64 view = cmSystemTools::KeyWOW64_32;
+  cmSystemTools::KeyWOW64 other_view = cmSystemTools::KeyWOW64_64;
+  if(const char* psize =
+     this->Makefile->GetDefinition("CMAKE_SIZEOF_VOID_P"))
+    {
+    if(atoi(psize) == 8)
       {
-      cmSystemTools::ExpandListArgument(path, tmp);
-      this->AddPathsInternal(paths, tmp, CMakePath);
-      tmp.clear();
+      view = cmSystemTools::KeyWOW64_64;
+      other_view = cmSystemTools::KeyWOW64_32;
       }
     }
 
-  // add cmake system variables
-  if(!this->NoCMakeSystemPath)
-    {
-    if(const char* path =
-       this->Makefile->GetDefinition("CMAKE_SYSTEM_APPBUNDLE_PATH"))
-      {
-      cmSystemTools::ExpandListArgument(path, tmp);
-      this->AddPathsInternal(paths, tmp, CMakePath);
-      tmp.clear();
-      }
-    }
-}
+  // Expand using the view of the target application.
+  std::string expanded = p;
+  cmSystemTools::ExpandRegistryValues(expanded, view);
+  cmSystemTools::GlobDirs(expanded.c_str(), this->UserPaths);
 
-//----------------------------------------------------------------------------
-void cmFindCommon::GetFrameworkPaths(std::vector<std::string>& paths)
-{
-  if(this->NoDefaultPath)
+  // Executables can be either 32-bit or 64-bit, so expand using the
+  // alternative view.
+  if(expanded != p && this->CMakePathName == "PROGRAM")
     {
-    return;
-    }
-  std::vector<std::string> tmp;
-
-  // first environment variables
-  if(!this->NoCMakeEnvironmentPath)
-    {
-    cmSystemTools::GetPath(tmp, "CMAKE_FRAMEWORK_PATH");
-    this->AddPathsInternal(paths, tmp, EnvPath);
-    tmp.clear();
-    }
-
-  // add cmake variables
-  if(!this->NoCMakePath)
-    {
-    if(const char* path =
-       this->Makefile->GetDefinition("CMAKE_FRAMEWORK_PATH"))
-      {
-      cmSystemTools::ExpandListArgument(path, tmp);
-      this->AddPathsInternal(paths, tmp, CMakePath);
-      tmp.clear();
-      }
-    }
-
-  // add cmake system variables
-  if(!this->NoCMakeSystemPath)
-    {
-    if(const char* path =
-       this->Makefile->GetDefinition("CMAKE_SYSTEM_FRAMEWORK_PATH"))
-      {
-      cmSystemTools::ExpandListArgument(path, tmp);
-      this->AddPathsInternal(paths, tmp, CMakePath);
-      tmp.clear();
-      }
+    expanded = p;
+    cmSystemTools::ExpandRegistryValues(expanded, other_view);
+    cmSystemTools::GlobDirs(expanded.c_str(), this->UserPaths);
     }
 }
 
 //----------------------------------------------------------------------------
-void cmFindCommon::AddCMakePath(std::vector<std::string>& out_paths,
-                                const char* variable,
-                                std::set<cmStdString>* emmitted)
+void cmFindCommon::AddCMakePath(const char* variable)
 {
   // Get a path from a CMake variable.
   if(const char* varPath = this->Makefile->GetDefinition(variable))
@@ -418,14 +364,12 @@ void cmFindCommon::AddCMakePath(std::vector<std::string>& out_paths,
 
     // Relative paths are interpreted with respect to the current
     // source directory.
-    this->AddPathsInternal(out_paths, tmp, CMakePath, emmitted);
+    this->AddPathsInternal(tmp, CMakePath);
     }
 }
 
 //----------------------------------------------------------------------------
-void cmFindCommon::AddEnvPath(std::vector<std::string>& out_paths,
-                              const char* variable,
-                              std::set<cmStdString>* emmitted)
+void cmFindCommon::AddEnvPath(const char* variable)
 {
   // Get a path from the environment.
   std::vector<std::string> tmp;
@@ -433,27 +377,23 @@ void cmFindCommon::AddEnvPath(std::vector<std::string>& out_paths,
 
   // Relative paths are interpreted with respect to the current
   // working directory.
-  this->AddPathsInternal(out_paths, tmp, EnvPath, emmitted);
+  this->AddPathsInternal(tmp, EnvPath);
 }
 
 //----------------------------------------------------------------------------
-void cmFindCommon::AddPathsInternal(std::vector<std::string>& out_paths,
-                                    std::vector<std::string> const& in_paths,
-                                    PathType pathType,
-                                    std::set<cmStdString>* emmitted)
+void cmFindCommon::AddPathsInternal(std::vector<std::string> const& in_paths,
+                                    PathType pathType)
 {
   for(std::vector<std::string>::const_iterator i = in_paths.begin();
       i != in_paths.end(); ++i)
     {
-    this->AddPathInternal(out_paths, *i, pathType, emmitted);
+    this->AddPathInternal(*i, pathType);
     }
 }
 
 //----------------------------------------------------------------------------
-void cmFindCommon::AddPathInternal(std::vector<std::string>& out_paths,
-                                   std::string const& in_path,
-                                   PathType pathType,
-                                   std::set<cmStdString>* emmitted)
+void cmFindCommon::AddPathInternal(std::string const& in_path,
+                                   PathType pathType)
 {
   if(in_path.empty())
     {
@@ -471,9 +411,9 @@ void cmFindCommon::AddPathInternal(std::vector<std::string>& out_paths,
   std::string fullPath =
     cmSystemTools::CollapseFullPath(in_path.c_str(), relbase);
 
-  // Insert the path if has not already been emmitted.
-  if(!emmitted || emmitted->insert(fullPath).second)
+  // Insert the path if has not already been emitted.
+  if(this->SearchPathsEmitted.insert(fullPath).second)
     {
-    out_paths.push_back(fullPath.c_str());
+    this->SearchPaths.push_back(fullPath.c_str());
     }
 }
diff --git a/Source/cmFindCommon.h b/Source/cmFindCommon.h
index 962a017..e141a08 100644
--- a/Source/cmFindCommon.h
+++ b/Source/cmFindCommon.h
@@ -55,21 +55,12 @@ protected:
 
   bool CheckCommonArgument(std::string const& arg);
   void AddPathSuffix(std::string const& arg);
-  void GetAppBundlePaths(std::vector<std::string>& paths);
-  void GetFrameworkPaths(std::vector<std::string>& paths);
-
-  void AddCMakePath(std::vector<std::string>& out_paths,
-                    const char* variable, std::set<cmStdString>* emmitted = 0);
-  void AddEnvPath(std::vector<std::string>& out_paths,
-                  const char* variable, std::set<cmStdString>* emmitted = 0);
-  void AddPathsInternal(std::vector<std::string>& out_paths,
-                        std::vector<std::string> const& in_paths,
-                        PathType pathType,
-                        std::set<cmStdString>* emmitted = 0);
-  void AddPathInternal(std::vector<std::string>& out_paths,
-                       std::string const& in_path,
-                       PathType pathType,
-                       std::set<cmStdString>* emmitted = 0);
+  void AddUserPath(std::string const& p);
+  void AddCMakePath(const char* variable);
+  void AddEnvPath(const char* variable);
+  void AddPathsInternal(std::vector<std::string> const& in_paths,
+                        PathType pathType);
+  void AddPathInternal(std::string const& in_path, PathType pathType);
 
   bool NoDefaultPath;
   bool NoCMakePath;
@@ -78,6 +69,9 @@ protected:
   bool NoCMakeSystemPath;
 
   std::vector<std::string> SearchPathSuffixes;
+  std::vector<std::string> UserPaths;
+  std::vector<std::string> SearchPaths;
+  std::set<cmStdString> SearchPathsEmitted;
 
   std::string GenericDocumentationMacPolicy;
   std::string GenericDocumentationRootPath;
diff --git a/Source/cmFindPackageCommand.cxx b/Source/cmFindPackageCommand.cxx
index 741a08f..5cc1724 100644
--- a/Source/cmFindPackageCommand.cxx
+++ b/Source/cmFindPackageCommand.cxx
@@ -821,8 +821,9 @@ void cmFindPackageCommand::FindConfig()
 //----------------------------------------------------------------------------
 bool cmFindPackageCommand::FindPrefixedConfig()
 {
-  for(std::vector<std::string>::const_iterator pi = this->Prefixes.begin();
-      pi != this->Prefixes.end(); ++pi)
+  std::vector<std::string>& prefixes = this->SearchPaths;
+  for(std::vector<std::string>::const_iterator pi = prefixes.begin();
+      pi != prefixes.end(); ++pi)
     {
     if(this->SearchPrefix(*pi))
       {
@@ -835,8 +836,9 @@ bool cmFindPackageCommand::FindPrefixedConfig()
 //----------------------------------------------------------------------------
 bool cmFindPackageCommand::FindFrameworkConfig()
 {
-  for(std::vector<std::string>::const_iterator i = this->Prefixes.begin();
-      i != this->Prefixes.end(); ++i)
+  std::vector<std::string>& prefixes = this->SearchPaths;
+  for(std::vector<std::string>::const_iterator i = prefixes.begin();
+      i != prefixes.end(); ++i)
     {
     if(this->SearchFrameworkPrefix(*i))
       {
@@ -849,8 +851,9 @@ bool cmFindPackageCommand::FindFrameworkConfig()
 //----------------------------------------------------------------------------
 bool cmFindPackageCommand::FindAppBundleConfig()
 {
-  for(std::vector<std::string>::const_iterator i = this->Prefixes.begin();
-      i != this->Prefixes.end(); ++i)
+  std::vector<std::string>& prefixes = this->SearchPaths;
+  for(std::vector<std::string>::const_iterator i = prefixes.begin();
+      i != prefixes.end(); ++i)
     {
     if(this->SearchAppBundlePrefix(*i))
       {
@@ -939,19 +942,20 @@ void cmFindPackageCommand::AppendSuccessInformation()
 }
 
 //----------------------------------------------------------------------------
-void cmFindPackageCommand::AddUserPath(std::string const& p)
+void cmFindPackageCommand::ComputePrefixes()
 {
-  std::string userPath = p;
-  cmSystemTools::ExpandRegistryValues(userPath);
-  this->UserPaths.push_back(userPath);
+  this->AddPrefixesCMakeEnvironment();
+  this->AddPrefixesCMakeVariable();
+  this->AddPrefixesSystemEnvironment();
+  this->AddPrefixesBuilds();
+  this->AddPrefixesCMakeSystemVariable();
+  this->AddPrefixesUser();
+  this->ComputeFinalPrefixes();
 }
 
 //----------------------------------------------------------------------------
-void cmFindPackageCommand::ComputePrefixes()
+void cmFindPackageCommand::AddPrefixesCMakeEnvironment()
 {
-  std::vector<std::string>& prefixes = this->Prefixes;
-  std::set<cmStdString> emmitted;
-
   if(!this->NoCMakeEnvironmentPath && !this->NoDefaultPath)
     {
     // Check the environment variable with the same name as the cache
@@ -960,21 +964,29 @@ void cmFindPackageCommand::ComputePrefixes()
     if(cmSystemTools::GetEnv(this->Variable.c_str(), env) && env.length() > 0)
       {
       cmSystemTools::ConvertToUnixSlashes(env);
-      this->AddPathInternal(prefixes, env, EnvPath, &emmitted);
+      this->AddPathInternal(env, EnvPath);
       }
 
-    this->AddEnvPath(prefixes, "CMAKE_PREFIX_PATH", &emmitted);
-    this->AddEnvPath(prefixes, "CMAKE_FRAMEWORK_PATH", &emmitted);
-    this->AddEnvPath(prefixes, "CMAKE_APPBUNDLE_PATH", &emmitted);
+    this->AddEnvPath("CMAKE_PREFIX_PATH");
+    this->AddEnvPath("CMAKE_FRAMEWORK_PATH");
+    this->AddEnvPath("CMAKE_APPBUNDLE_PATH");
     }
+}
 
+//----------------------------------------------------------------------------
+void cmFindPackageCommand::AddPrefixesCMakeVariable()
+{
   if(!this->NoCMakePath && !this->NoDefaultPath)
     {
-    this->AddCMakePath(prefixes, "CMAKE_PREFIX_PATH", &emmitted);
-    this->AddCMakePath(prefixes, "CMAKE_FRAMEWORK_PATH", &emmitted);
-    this->AddCMakePath(prefixes, "CMAKE_APPBUNDLE_PATH", &emmitted);
+    this->AddCMakePath("CMAKE_PREFIX_PATH");
+    this->AddCMakePath("CMAKE_FRAMEWORK_PATH");
+    this->AddCMakePath("CMAKE_APPBUNDLE_PATH");
     }
+}
 
+//----------------------------------------------------------------------------
+void cmFindPackageCommand::AddPrefixesSystemEnvironment()
+{
   if(!this->NoSystemEnvironmentPath && !this->NoDefaultPath)
     {
     // Use the system search path to generate prefixes.
@@ -991,17 +1003,19 @@ void cmFindPackageCommand::ComputePrefixes()
       if(d.size() >= 4 && strcmp(d.c_str()+d.size()-4, "/bin") == 0 ||
          d.size() >= 5 && strcmp(d.c_str()+d.size()-5, "/sbin") == 0)
         {
-        this->AddPathInternal(prefixes,
-                              cmSystemTools::GetFilenamePath(d),
-                              EnvPath, &emmitted);
+        this->AddPathInternal(cmSystemTools::GetFilenamePath(d), EnvPath);
         }
       else
         {
-        this->AddPathInternal(prefixes, d, EnvPath, &emmitted);
+        this->AddPathInternal(d, EnvPath);
         }
       }
     }
+}
 
+//----------------------------------------------------------------------------
+void cmFindPackageCommand::AddPrefixesBuilds()
+{
   if(!this->NoBuilds && !this->NoDefaultPath)
     {
     // It is likely that CMake will have recently built the project.
@@ -1017,23 +1031,37 @@ void cmFindPackageCommand::ComputePrefixes()
       if(cmSystemTools::FileIsFullPath(f.c_str()) &&
          cmSystemTools::FileIsDirectory(f.c_str()))
         {
-        this->AddPathInternal(prefixes, f, FullPath, &emmitted);
+        this->AddPathInternal(f, FullPath);
         }
       }
     }
+}
 
+//----------------------------------------------------------------------------
+void cmFindPackageCommand::AddPrefixesCMakeSystemVariable()
+{
   if(!this->NoCMakeSystemPath && !this->NoDefaultPath)
     {
-    this->AddCMakePath(prefixes, "CMAKE_SYSTEM_PREFIX_PATH", &emmitted);
-    this->AddCMakePath(prefixes, "CMAKE_SYSTEM_FRAMEWORK_PATH", &emmitted);
-    this->AddCMakePath(prefixes, "CMAKE_SYSTEM_APPBUNDLE_PATH", &emmitted);
+    this->AddCMakePath("CMAKE_SYSTEM_PREFIX_PATH");
+    this->AddCMakePath("CMAKE_SYSTEM_FRAMEWORK_PATH");
+    this->AddCMakePath("CMAKE_SYSTEM_APPBUNDLE_PATH");
     }
+}
 
+//----------------------------------------------------------------------------
+void cmFindPackageCommand::AddPrefixesUser()
+{
   if(!this->UserPaths.empty())
     {
     // Add paths specified by the caller.
-    this->AddPathsInternal(prefixes, this->UserPaths, CMakePath, &emmitted);
+    this->AddPathsInternal(this->UserPaths, CMakePath);
     }
+}
+
+//----------------------------------------------------------------------------
+void cmFindPackageCommand::ComputeFinalPrefixes()
+{
+  std::vector<std::string>& prefixes = this->SearchPaths;
 
   // Construct the final set of prefixes.
   this->RerootPaths(prefixes);
diff --git a/Source/cmFindPackageCommand.h b/Source/cmFindPackageCommand.h
index 5581651..142ddda 100644
--- a/Source/cmFindPackageCommand.h
+++ b/Source/cmFindPackageCommand.h
@@ -82,8 +82,14 @@ private:
   bool ReadListFile(const char* f);
   void StoreVersionFound();
 
-  void AddUserPath(std::string const& p);
   void ComputePrefixes();
+  void AddPrefixesCMakeEnvironment();
+  void AddPrefixesCMakeVariable();
+  void AddPrefixesSystemEnvironment();
+  void AddPrefixesBuilds();
+  void AddPrefixesCMakeSystemVariable();
+  void AddPrefixesUser();
+  void ComputeFinalPrefixes();
   bool SearchDirectory(std::string const& dir);
   bool CheckDirectory(std::string const& dir);
   bool FindConfigFile(std::string const& dir, std::string& file);
@@ -119,8 +125,6 @@ private:
   bool DebugMode;
   std::vector<std::string> Names;
   std::vector<std::string> Configs;
-  std::vector<std::string> Prefixes;
-  std::vector<std::string> UserPaths;
 };
 
 #endif