[Support] Make CleanupInstaller public (NFC) (llvm#86758)

This can be used by others to automatically remove temp files.

llvm/include/llvm/Support/ToolOutputFile.h

@@ -18,6 +18,19 @@
 
 namespace llvm {
 
+class CleanupInstaller {
+public:
+  /// The name of the file.
+  std::string Filename;
+
+  /// The flag which indicates whether we should not delete the file.
+  bool Keep;
+
+  StringRef getFilename() { return Filename; }
+  explicit CleanupInstaller(StringRef Filename);
+  ~CleanupInstaller();
+};
+
 /// This class contains a raw_fd_ostream and adds a few extra features commonly
 /// needed for compiler-like tool output files:
 ///   - The file is automatically deleted if the process is killed.
@@ -28,18 +41,7 @@ class ToolOutputFile {
   /// before the raw_fd_ostream is constructed and destructed after the
   /// raw_fd_ostream is destructed. It installs cleanups in its constructor and
   /// uninstalls them in its destructor.
-  class CleanupInstaller {
-  public:
-    /// The name of the file.
-    std::string Filename;
-
-    /// The flag which indicates whether we should not delete the file.
-    bool Keep;
-
-    StringRef getFilename() { return Filename; }
-    explicit CleanupInstaller(StringRef Filename);
-    ~CleanupInstaller();
-  } Installer;
+  CleanupInstaller Installer;
 
   /// Storage for the stream, if we're owning our own stream. This is
   /// intentionally declared after Installer.

llvm/lib/Support/ToolOutputFile.cpp

@@ -17,14 +17,14 @@ using namespace llvm;
 
 static bool isStdout(StringRef Filename) { return Filename == "-"; }
 
-ToolOutputFile::CleanupInstaller::CleanupInstaller(StringRef Filename)
+CleanupInstaller::CleanupInstaller(StringRef Filename)
     : Filename(std::string(Filename)), Keep(false) {
   // Arrange for the file to be deleted if the process is killed.
   if (!isStdout(Filename))
     sys::RemoveFileOnSignal(Filename);
 }
 
-ToolOutputFile::CleanupInstaller::~CleanupInstaller() {
+CleanupInstaller::~CleanupInstaller() {
   if (isStdout(Filename))
     return;