refactor: temp directories use output path

Author: alandefreitas

src/lib/Support/Path.cpp

@@ -504,6 +504,28 @@ ScopedTempDirectory(
     }
 }
 
+ScopedTempDirectory::
+ScopedTempDirectory(
+    llvm::StringRef root,
+    llvm::StringRef dir)
+{
+    llvm::SmallString<128> tempPath(root);
+    llvm::sys::path::append(tempPath, dir);
+    bool const exists = llvm::sys::fs::exists(tempPath);
+    if (exists)
+    {
+        ok_ = !llvm::sys::fs::remove_directories(tempPath);
+        if (!ok_)
+        {
+            return;
+        }
+    }
+    ok_ = !llvm::sys::fs::create_directory(tempPath);
+    if (ok_)
+    {
+        path_ = tempPath;
+    }
+}
 
 } // mrdocs
 } // clang

src/lib/Support/Path.hpp

@@ -107,17 +107,37 @@ class ScopedTempDirectory
         <tempdir>/<prefix><random>
         @endcode
 
+        For instance, if the prefix is "mrdocs" and the operating system
+        is Unix, the directory might be created as: "/tmp/mrdocs-1234".
+
+        On Windows, the directory might be created as:
+        "C:\Users\user\AppData\Local\Temp\mrdocs-1234".
+
         @param prefix The prefix for the temporary directory name.
     */
     ScopedTempDirectory(llvm::StringRef prefix);
 
+    /** Constructor with a specific path
+
+        Creates a temporary directory with the given path.
+        The directory is deleted when this object goes out of scope.
+
+        @param root The root directory for the temporary directory.
+        @param dir The name of the temporary directory.
+    */
+    ScopedTempDirectory(llvm::StringRef root, llvm::StringRef dir);
+
     /** Returns `true` if the directory was created successfully.
     */
     operator bool() const { return ok_; }
 
     /** Returns the path to the temporary directory.
      */
-    llvm::StringRef path() const { return path_; }
+    std::string_view path() const { return static_cast<llvm::StringRef>(path_); }
+
+    /** Convert temp directory to a std::string_view
+     */
+    operator std::string_view() const { return path(); }
 };
 
 } // mrdocs

src/tool/GenerateAction.cpp

@@ -127,15 +127,16 @@ DoGenerateAction(
     if (compilationDatabasePath.empty())
     {
         std::string c = files::appendPath(settings.sourceRoot, "CMakeLists.txt");
-        if (files::exists(c)) {
+        if (files::exists(c))
+        {
             compilationDatabasePath = c;
         }
     }
     MRDOCS_CHECK(
         compilationDatabasePath,
         "The compilation database path argument is missing");
-    ScopedTempDirectory tempDir("mrdocs");
-    std::string buildPath = files::appendPath(tempDir.path(), "build");
+    ScopedTempDirectory tempDir(config->settings().output, ".temp");
+    std::string buildPath = files::appendPath(tempDir, "build");
     Expected<std::string> const compileCommandsPathExp =
         generateCompileCommandsFile(
             compilationDatabasePath, settings.cmake, buildPath);