ENH: Added UTILITY_SOURCE command for specifying where a 3rd party utility's source is located when it is included in the distribution of a project.

1 files changed, 81 insertions, 0 deletions

diff --git a/Source/cmUtilitySourceCommand.cxx b/Source/cmUtilitySourceCommand.cxx
new file mode 100644
index 0000000..0a8c9b7
--- /dev/null
+++ b/Source/cmUtilitySourceCommand.cxx
@@ -0,0 +1,81 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
+#include "cmUtilitySourceCommand.h"
+
+// cmUtilitySourceCommand
+bool cmUtilitySourceCommand::Invoke(std::vector<std::string>& args)
+{
+  if(args.size() < 3)
+    {
+    this->SetError("called with incorrect number of arguments");
+    return false;
+    }
+  
+  std::vector<std::string>::const_iterator arg = args.begin();
+  
+  // The first argument is the cache entry name.
+  std::string cacheEntry = *arg++;
+  const char* cacheValue =
+    cmCacheManager::GetInstance()->GetCacheValue(cacheEntry.c_str());
+  // If it exists already, we are done.
+  if(cacheValue)
+    {
+    // Set the makefile's definition with the cache value.
+    m_Makefile->AddDefinition(cacheEntry.c_str(), cacheValue);
+    return true;
+    }
+  
+  // The second argument is the utility's executable name, which will be
+  // needed later.
+  std::string utilityName = *arg++;
+  
+  // The third argument specifies the relative directory of the source
+  // of the utility.
+  std::string relativeSource = *arg++;
+  std::string utilitySource = m_Makefile->GetCurrentDirectory();
+  utilitySource = utilitySource+"/"+relativeSource;
+  
+  // If the directory doesn't exist, the source has not been included.
+  if(!cmSystemTools::FileExists(utilitySource.c_str()))
+    { return true; }
+  
+  // Make sure all the files exist in the source directory.
+  while(arg != args.end())
+    {
+    std::string file = utilitySource+"/"+*arg++;
+    if(!cmSystemTools::FileExists(file.c_str()))
+      { return true; }
+    }
+  
+  // The source exists.  Construct the cache entry for the executable's
+  // location.
+  std::string cmakeCFG = m_Makefile->GetDefinition("CMAKE_CFG");
+  std::string utilityExecutable = m_Makefile->GetCurrentOutputDirectory();
+  utilityExecutable =
+    (utilityExecutable+"/"+relativeSource+"/"+cmakeCFG+"/"
+     +utilityName+cmSystemTools::GetExecutableExtension());
+  
+  // Enter the value into the cache.
+  cmCacheManager::GetInstance()->AddCacheEntry(cacheEntry.c_str(),
+                                               utilityExecutable.c_str(),
+                                               cmCacheManager::FILEPATH);
+  
+  // Set the definition in the makefile.
+  m_Makefile->AddDefinition(cacheEntry.c_str(), utilityExecutable.c_str());
+  
+  return true;
+}
+