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diff --git a/Source/CTest/cmCTestVC.h b/Source/CTest/cmCTestVC.h
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+++ b/Source/CTest/cmCTestVC.h
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+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2000-2009 Kitware, Inc.
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+#ifndef cmCTestVC_h
+#define cmCTestVC_h
+
+#include "cmProcessTools.h"
+
+class cmCTest;
+
+/** \class cmCTestVC
+ * \brief Base class for version control system handlers
+ *
+ */
+class cmCTestVC: public cmProcessTools
+{
+public:
+  /** Construct with a CTest instance and update log stream.  */
+  cmCTestVC(cmCTest* ctest, std::ostream& log);
+
+  virtual ~cmCTestVC();
+
+  /** Command line tool to invoke.  */
+  void SetCommandLineTool(std::string const& tool);
+
+  /** Top-level source directory.  */
+  void SetSourceDirectory(std::string const& dir);
+
+  /** Get the date/time specification for the current nightly start time.  */
+  std::string GetNightlyTime();
+
+  /** Prepare the work tree.  */
+  bool InitialCheckout(const char* command);
+
+  /** Perform cleanup operations on the work tree.  */
+  void Cleanup();
+
+  /** Update the working tree to the new revision.  */
+  bool Update();
+
+  /** Get the command line used by the Update method.  */
+  std::string const& GetUpdateCommandLine() const
+    { return this->UpdateCommandLine; }
+
+  /** Write Update.xml entries for the updates found.  */
+  bool WriteXML(std::ostream& xml);
+
+  /** Enumerate non-trivial working tree states during update.  */
+  enum PathStatus { PathUpdated, PathModified, PathConflicting };
+
+  /** Get the number of working tree paths in each state after update.  */
+  int GetPathCount(PathStatus s) const { return this->PathCount[s]; }
+
+protected:
+  // Internal API to be implemented by subclasses.
+  virtual void CleanupImpl();
+  virtual void NoteOldRevision();
+  virtual bool UpdateImpl();
+  virtual void NoteNewRevision();
+  virtual bool WriteXMLUpdates(std::ostream& xml);
+
+  /** Basic information about one revision of a tree or file.  */
+  struct Revision
+  {
+    std::string Rev;
+    std::string Date;
+    std::string Author;
+    std::string EMail;
+    std::string Committer;
+    std::string CommitterEMail;
+    std::string CommitDate;
+    std::string Log;
+  };
+
+  struct File;
+  friend struct File;
+
+  /** Represent change to one file.  */
+  struct File
+  {
+    PathStatus Status;
+    Revision const* Rev;
+    Revision const* PriorRev;
+    File(): Status(PathUpdated), Rev(0), PriorRev(0) {}
+    File(PathStatus status, Revision const* rev, Revision const* priorRev):
+      Status(status), Rev(rev), PriorRev(priorRev) {}
+  };
+
+  /** Convert a list of arguments to a human-readable command line.  */
+  static std::string ComputeCommandLine(char const* const* cmd);
+
+  /** Run a command line and send output to given parsers.  */
+  bool RunChild(char const* const* cmd, OutputParser* out,
+                OutputParser* err, const char* workDir = 0);
+
+  /** Run VC update command line and send output to given parsers.  */
+  bool RunUpdateCommand(char const* const* cmd,
+                        OutputParser* out, OutputParser* err = 0);
+
+  /** Write xml element for one file.  */
+  void WriteXMLEntry(std::ostream& xml, std::string const& path,
+                     std::string const& name, std::string const& full,
+                     File const& f);
+
+  // Instance of cmCTest running the script.
+  cmCTest* CTest;
+
+  // A stream to which we write log information.
+  std::ostream& Log;
+
+  // Basic information about the working tree.
+  std::string CommandLineTool;
+  std::string SourceDirectory;
+
+  // Record update command info.
+  std::string UpdateCommandLine;
+
+  // Placeholder for unknown revisions.
+  Revision Unknown;
+
+  // Count paths reported with each PathStatus value.
+  int PathCount[3];
+};
+
+#endif