ENH: Split dependency scanning and checking into separate cmDepends superclass with language-specific subclasses such as cmDependsC.

1 files changed, 96 insertions, 0 deletions

diff --git a/Source/cmDepends.cxx b/Source/cmDepends.cxx
new file mode 100644
index 0000000..4933f5f
--- /dev/null
+++ b/Source/cmDepends.cxx
@@ -0,0 +1,96 @@
+/*=========================================================================
+
+  Program:   CMake - Cross-Platform Makefile Generator
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+  Copyright (c) 2002 Kitware, Inc., Insight Consortium.  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.
+
+=========================================================================*/
+#include "cmDepends.h"
+
+#include "cmGeneratedFileStream.h"
+#include "cmSystemTools.h"
+
+//----------------------------------------------------------------------------
+cmDepends::cmDepends(const char* dir, const char* targetFile):
+  m_Directory(dir),
+  m_TargetFile(targetFile),
+  m_DependsMakeFile(dir),
+  m_DependsMarkFile(dir)
+{
+  // Construct the path to the make and mark files.  Append
+  // appropriate extensions to their names.
+  m_DependsMakeFile += "/";
+  m_DependsMarkFile += "/";
+  m_DependsMakeFile += m_TargetFile;
+  m_DependsMarkFile += m_TargetFile;
+  m_DependsMakeFile += ".depends.make";
+  m_DependsMarkFile += ".depends";
+}
+
+//----------------------------------------------------------------------------
+cmDepends::~cmDepends()
+{
+}
+
+//----------------------------------------------------------------------------
+void cmDepends::Write()
+{
+  // Try to generate dependencies for the target file.
+  cmGeneratedFileStream fout(m_DependsMakeFile.c_str());
+  fout << "# Dependencies for " << m_TargetFile.c_str() << std::endl;
+  if(this->WriteDependencies(fout) && fout)
+    {
+    // Dependencies were generated.  Touch the mark file.
+    std::ofstream fmark(m_DependsMarkFile.c_str());
+    fmark << "Dependencies updated for " << m_TargetFile.c_str() << std::endl;
+    }
+}
+
+//----------------------------------------------------------------------------
+void cmDepends::Check()
+{
+  // Check whether dependencies must be regenerated.
+  std::ifstream fin(m_DependsMakeFile.c_str());
+  if(!(fin && this->CheckDependencies(fin)))
+    {
+    // Clear all dependencies so they will be regenerated.
+    this->Clear();
+    }
+}
+
+//----------------------------------------------------------------------------
+void cmDepends::Clear()
+{
+  // Remove the dependency mark file to be sure dependencies will be
+  // regenerated.
+  cmSystemTools::RemoveFile(m_DependsMarkFile.c_str());
+
+  // Write an empty dependency file.
+  cmGeneratedFileStream depFileStream(m_DependsMakeFile.c_str());
+  depFileStream
+    << "# Empty dependencies file for " << m_TargetFile.c_str() << ".\n"
+    << "# This may be replaced when dependencies are built." << std::endl;
+}
+
+//----------------------------------------------------------------------------
+const char* cmDepends::GetMakeFileName()
+{
+  // Skip over the directory part of the name.
+  return m_DependsMakeFile.c_str() + m_Directory.length() + 1;
+}
+
+//----------------------------------------------------------------------------
+const char* cmDepends::GetMarkFileName()
+{
+  // Skip over the directory part of the name.
+  return m_DependsMarkFile.c_str() + m_Directory.length() + 1;
+}