ENH: Teach CTest to handle Mercurial repositories

This creates cmCTestHG to drive CTest Update handling on hg-based work
trees.  Currently we always update to the head of the remote tracking
branch (hg pull), so the nightly start time is ignored for Nightly
builds.  A later change will address this.

See issue #7879.  Patch from Emmanuel Christophe.  I modified the patch
slightly for code style, to finish up some parsing details, and to fix
the test.

1 files changed, 52 insertions, 0 deletions

diff --git a/Source/CTest/cmCTestHG.h b/Source/CTest/cmCTestHG.h
new file mode 100644
index 0000000..aafa0e1
--- /dev/null
+++ b/Source/CTest/cmCTestHG.h
@@ -0,0 +1,52 @@
+/*=========================================================================
+
+  Program:   CMake - Cross-Platform Makefile Generator
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+  Copyright (c) 2002 Kitware, Inc. All rights reserved.
+  See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
+
+     This software is distributed WITHOUT ANY WARRANTY; without even
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+     PURPOSE.  See the above copyright notices for more information.
+
+=========================================================================*/
+#ifndef cmCTestHG_h
+#define cmCTestHG_h
+
+#include "cmCTestGlobalVC.h"
+
+/** \class cmCTestHG
+ * \brief Interaction with Mercurial command-line tool
+ *
+ */
+class cmCTestHG: public cmCTestGlobalVC
+{
+public:
+  /** Construct with a CTest instance and update log stream.  */
+  cmCTestHG(cmCTest* ctest, std::ostream& log);
+
+  virtual ~cmCTestHG();
+
+private:
+  std::string GetWorkingRevision();
+  virtual void NoteOldRevision();
+  virtual void NoteNewRevision();
+  virtual bool UpdateImpl();
+
+  void LoadRevisions();
+  void LoadModifications();
+
+  // Parsing helper classes.
+  class IdentifyParser;
+  class StatusParser;
+  class LogParser;
+  friend class IdentifyParser;
+  friend class StatusParser;
+  friend class LogParser;
+};
+
+#endif