cmSourceFile: use unique_ptr for CustomCommand

Source/cmMakefile.cxx

@@ -15,6 +15,8 @@
 #include <stdlib.h>
 #include <utility>
 
+#include "cm_memory.hxx"
+
 #include "cmAlgorithms.h"
 #include "cmCommandArgumentParserHelper.h"
 #include "cmCustomCommand.h"
@@ -1025,7 +1027,7 @@ cmSourceFile* cmMakefile::AddCustomCommandToOutput(
       depends2.push_back(main_dependency);
     }
 
-    cmCustomCommand* cc = new cmCustomCommand(
+    std::unique_ptr<cmCustomCommand> cc = cm::make_unique<cmCustomCommand>(
       this, outputs, byproducts, depends2, commandLines, comment, workingDir);
     cc->SetEscapeOldStyle(escapeOldStyle);
     cc->SetEscapeAllowMakeVars(true);
@@ -1033,7 +1035,7 @@ cmSourceFile* cmMakefile::AddCustomCommandToOutput(
     cc->SetCommandExpandLists(command_expand_lists);
     cc->SetDepfile(depfile);
     cc->SetJobPool(job_pool);
-    file->SetCustomCommand(cc);
+    file->SetCustomCommand(std::move(cc));
     this->UpdateOutputToSourceMap(outputs, file, false);
     this->UpdateOutputToSourceMap(byproducts, file, true);
   }

Source/cmSourceFile.cxx

@@ -5,7 +5,6 @@
 #include <array>
 #include <utility>
 
-#include "cmCustomCommand.h"
 #include "cmGlobalGenerator.h"
 #include "cmMakefile.h"
 #include "cmMessageType.h"
@@ -21,11 +20,6 @@ cmSourceFile::cmSourceFile(cmMakefile* mf, const std::string& name,
 {
 }
 
-cmSourceFile::~cmSourceFile()
-{
-  this->SetCustomCommand(nullptr);
-}
-
 std::string const& cmSourceFile::GetExtension() const
 {
   return this->Extension;
@@ -320,19 +314,12 @@ bool cmSourceFile::GetPropertyAsBool(const std::string& prop) const
   return cmIsOn(this->GetProperty(prop));
 }
 
-cmCustomCommand* cmSourceFile::GetCustomCommand()
+cmCustomCommand* cmSourceFile::GetCustomCommand() const
 {
-  return this->CustomCommand;
+  return this->CustomCommand.get();
 }
 
-cmCustomCommand const* cmSourceFile::GetCustomCommand() const
+void cmSourceFile::SetCustomCommand(std::unique_ptr<cmCustomCommand> cc)
 {
-  return this->CustomCommand;
-}
-
-void cmSourceFile::SetCustomCommand(cmCustomCommand* cc)
-{
-  cmCustomCommand* old = this->CustomCommand;
-  this->CustomCommand = cc;
-  delete old;
+  this->CustomCommand = std::move(cc);
 }

Source/cmSourceFile.h

@@ -5,14 +5,15 @@
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
+#include "cmCustomCommand.h"
 #include "cmPropertyMap.h"
 #include "cmSourceFileLocation.h"
 #include "cmSourceFileLocationKind.h"
 
+#include <memory>
 #include <string>
 #include <vector>
 
-class cmCustomCommand;
 class cmMakefile;
 
 /** \class cmSourceFile
@@ -32,17 +33,11 @@ public:
     cmMakefile* mf, const std::string& name,
     cmSourceFileLocationKind kind = cmSourceFileLocationKind::Ambiguous);
 
-  ~cmSourceFile();
-
-  cmSourceFile(const cmSourceFile&) = delete;
-  cmSourceFile& operator=(const cmSourceFile&) = delete;
-
   /**
-   * Get the list of the custom commands for this source file
+   * Get the custom command for this source file
    */
-  cmCustomCommand* GetCustomCommand();
-  cmCustomCommand const* GetCustomCommand() const;
-  void SetCustomCommand(cmCustomCommand* cc);
+  cmCustomCommand* GetCustomCommand() const;
+  void SetCustomCommand(std::unique_ptr<cmCustomCommand> cc);
 
   //! Set/Get a property of this source file
   void SetProperty(const std::string& prop, const char* value);
@@ -114,7 +109,7 @@ public:
 private:
   cmSourceFileLocation Location;
   cmPropertyMap Properties;
-  cmCustomCommand* CustomCommand = nullptr;
+  std::unique_ptr<cmCustomCommand> CustomCommand;
   std::string Extension;
   std::string Language;
   std::string FullPath;