SublimeText 2 Gen: Set the sublimeclang_options_script property.

The sublimeclang_options_script property is now set in the project
file. It is set to execute a python script that reads the JSON options
file to get options per source file. Python must be installed and in the
path for this feature to work from Sublime Text.

Source/cmExtraSublimeTextGenerator.cxx

@@ -161,7 +161,11 @@ void cmExtraSublimeTextGenerator
   std::string projectName = mf->GetProjectName();
   std::string sublimeClangOptionsFilename = outputDir+"/";
   sublimeClangOptionsFilename += projectName + ".sublimeclang-options";
-  fout << "\t\"sublimeclang_options_file\": \"" << sublimeClangOptionsFilename
+  std::string sublimeClangOptionsScriptFilename = outputDir + "/"
+    + projectName + "_sublimeclang_options_script.py";
+  fout << "\t\"sublimeclang_options_script\": \"python "
+       << sublimeClangOptionsScriptFilename << " "
+       << sublimeClangOptionsFilename
        << "\"\n\t";
   // End of the settings section
   fout << "}\n";
@@ -171,8 +175,30 @@ void cmExtraSublimeTextGenerator
 
   this->WriteSublimeClangOptionsFile(sourceFileFlags,
     sublimeClangOptionsFilename);
+  this->WriteSublimeClangOptionsScript(sublimeClangOptionsScriptFilename);
 }
 
+void cmExtraSublimeTextGenerator::
+  WriteSublimeClangOptionsScript(const std::string& filename)
+{
+  cmGeneratedFileStream fout(filename.c_str());
+  if(!fout)
+    {
+    return;
+    }
+  fout << "import json\n";
+  fout << "import sys\n\n\n";
+  fout << "if len(sys.argv) < 2:\n";
+  fout << "    sys.exit(1)\n";
+  fout << "data = None\n";
+  fout << "with open(sys.argv[1]) as f:\n";
+  fout << "    data = json.load(f)\n";
+  fout << "if data is not None:\n";
+  fout << "    for arg in data.get(sys.argv[2], []):\n";
+  fout << "        print arg\n";
+}
+
+
 void cmExtraSublimeTextGenerator::
   WriteSublimeClangOptionsFile(const MapSourceFileFlags& sourceFileFlags,
                                const std::string& filename)
@@ -351,6 +377,7 @@ void cmExtraSublimeTextGenerator::
             this->ComputeDefines(*iter, lg, target, gtgt);
           flags.clear();
           cmsys::RegularExpression flagRegex;
+          // Regular expression to extract compiler flags from a string
           // https://gist.github.com/3944250
           const char* regexString =
             "(^|[ ])-[DIOUWfgs][^= ]+(=\\\"[^\"]+\\\"|=[^\"][^ ]+)?";

Source/cmExtraSublimeTextGenerator.h

@@ -48,6 +48,7 @@ private:
 
   void CreateNewProjectFile(const std::vector<cmLocalGenerator*>& lgs,
                                 const std::string& filename);
+  void WriteSublimeClangOptionsScript(const std::string& filename);
   void WriteSublimeClangOptionsFile(const MapSourceFileFlags& sourceFileFlags,
                                     const std::string& filename);
   /** Appends all targets as build systems to the project file and get all