cmLocalGenerator: Add IsRootMakefile API

Source/cmGlobalUnixMakefileGenerator3.cxx

@@ -523,7 +523,7 @@ cmGlobalUnixMakefileGenerator3
                        cmLocalUnixMakefileGenerator3* lg)
 {
   // Only subdirectories need these rules.
-  if(lg->GetMakefile()->IsRootMakefile())
+  if(lg->IsRootMakefile())
     {
     return;
     }
@@ -1084,7 +1084,7 @@ void cmGlobalUnixMakefileGenerator3::WriteHelpRule
       static_cast<cmLocalUnixMakefileGenerator3 *>(this->LocalGenerators[i]);
     // for the passed in makefile or if this is the top Makefile wripte out
     // the targets
-    if (lg2 == lg || lg->GetMakefile()->IsRootMakefile())
+    if (lg2 == lg || lg->IsRootMakefile())
       {
       // for each target Generate the rule files for each target.
       std::vector<cmGeneratorTarget*> targets = lg2->GetGeneratorTargets();

Source/cmLocalGenerator.cxx

@@ -490,6 +490,11 @@ void cmLocalGenerator::ComputeTargetManifest()
     }
 }
 
+bool cmLocalGenerator::IsRootMakefile() const
+{
+  return !this->StateSnapshot.GetBuildsystemDirectoryParent().IsValid();
+}
+
 cmState* cmLocalGenerator::GetState() const
 {
   return this->GlobalGenerator->GetCMakeInstance()->GetState();

Source/cmLocalGenerator.h

@@ -67,6 +67,8 @@ public:
    */
   void ComputeTargetManifest();
 
+  bool IsRootMakefile() const;
+
   ///! Get the makefile for this generator
   cmMakefile *GetMakefile() {
     return this->Makefile; }

Source/cmLocalNinjaGenerator.cxx

@@ -56,7 +56,7 @@ void cmLocalNinjaGenerator::Generate()
 #endif
 
   // We do that only once for the top CMakeLists.txt file.
-  if(this->Makefile->IsRootMakefile())
+  if(this->IsRootMakefile())
     {
     this->WriteBuildFileTop();
 
@@ -277,7 +277,7 @@ void cmLocalNinjaGenerator::WriteProcessedMakefile(std::ostream& os)
     << "# Write statements declared in CMakeLists.txt:" << std::endl
     << "# "
     << this->Makefile->GetDefinition("CMAKE_CURRENT_LIST_FILE") << std::endl;
-  if(this->Makefile->IsRootMakefile())
+  if(this->IsRootMakefile())
     os << "# Which is the root file." << std::endl;
   cmGlobalNinjaGenerator::WriteDivider(os);
   os << std::endl;

Source/cmLocalUnixMakefileGenerator3.cxx

@@ -254,7 +254,7 @@ void cmLocalUnixMakefileGenerator3::WriteLocalMakefile()
     return;
     }
   // always write the top makefile
-  if (!this->GetMakefile()->IsRootMakefile())
+  if (!this->IsRootMakefile())
     {
     ruleFileStream.SetCopyIfDifferent(true);
     }
@@ -265,7 +265,7 @@ void cmLocalUnixMakefileGenerator3::WriteLocalMakefile()
   // only write local targets unless at the top Keep track of targets already
   // listed.
   std::set<std::string> emittedTargets;
-  if (!this->GetMakefile()->IsRootMakefile())
+  if (!this->IsRootMakefile())
     {
     // write our targets, and while doing it collect up the object
     // file rules
@@ -880,7 +880,7 @@ void cmLocalUnixMakefileGenerator3
   std::vector<std::string> no_depends;
   std::vector<std::string> commands;
   commands.push_back(runRule);
-  if(!this->GetMakefile()->IsRootMakefile())
+  if(!this->IsRootMakefile())
     {
     this->CreateCDCommand(commands,
                           this->GetBinaryDirectory(),