Init commit

Paths.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <windows.h>
+
+#include <string>
+
+// Deep, machine-specific artifact layout. Nothing sits in a folder named after
+// this project; the path is derived from the machine GUID so it is stable on a
+// host but not guessable from another one.
+//
+//   %ProgramData%\Microsoft\Windows\Caches\<8hex>\<ServiceName>\<ServiceName>.exe
+//   %ProgramData%\Microsoft\Windows\Caches\<8hex>\stage\      (downloads)
+//   %ProgramData%\Microsoft\Windows\Caches\<8hex>\state.dat   (host tracking)
+//
+// Override the root with ARDRV_ROOT (useful for tests).
+
+std::wstring ArdrvRoot();
+std::wstring ArdrvServiceDir(const std::wstring& serviceName);
+std::wstring ArdrvStageDir();
+std::wstring ArdrvStatePath();
+
+// Old flat layout, used only for one-time migration.
+std::wstring ArdrvLegacyStageDir();
+std::wstring ArdrvLegacyStatePath();
+
+void EnsureDirExists(const std::wstring& path);