cmTarget: Add cmFileSet and associated properties

Source/cmFileSet.h

@@ -0,0 +1,64 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#pragma once
+
+#include <map>
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "cmListFileCache.h"
+
+class cmCompiledGeneratorExpression;
+struct cmGeneratorExpressionDAGChecker;
+class cmGeneratorTarget;
+class cmLocalGenerator;
+
+class cmFileSet
+{
+public:
+  cmFileSet(std::string name, std::string type);
+
+  const std::string& GetName() const { return this->Name; }
+  const std::string& GetType() const { return this->Type; }
+
+  void ClearDirectoryEntries();
+  void AddDirectoryEntry(BT<std::string> directories);
+  const std::vector<BT<std::string>>& GetDirectoryEntries() const
+  {
+    return this->DirectoryEntries;
+  }
+
+  void ClearFileEntries();
+  void AddFileEntry(BT<std::string> files);
+  const std::vector<BT<std::string>>& GetFileEntries() const
+  {
+    return this->FileEntries;
+  }
+
+  std::vector<std::unique_ptr<cmCompiledGeneratorExpression>>
+  CompileFileEntries() const;
+
+  std::vector<std::unique_ptr<cmCompiledGeneratorExpression>>
+  CompileDirectoryEntries() const;
+
+  std::vector<std::string> EvaluateDirectoryEntries(
+    const std::vector<std::unique_ptr<cmCompiledGeneratorExpression>>& cges,
+    cmLocalGenerator* lg, const std::string& config,
+    const cmGeneratorTarget* target,
+    cmGeneratorExpressionDAGChecker* dagChecker = nullptr) const;
+
+  void EvaluateFileEntry(
+    const std::vector<std::string>& dirs,
+    std::map<std::string, std::vector<std::string>>& filesPerDir,
+    const std::unique_ptr<cmCompiledGeneratorExpression>& cge,
+    cmLocalGenerator* lg, const std::string& config,
+    const cmGeneratorTarget* target,
+    cmGeneratorExpressionDAGChecker* dagChecker = nullptr) const;
+
+private:
+  std::string Name;
+  std::string Type;
+  std::vector<BT<std::string>> DirectoryEntries;
+  std::vector<BT<std::string>> FileEntries;
+};