first commit

proxy_chain_manager/paths.py

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+from __future__ import annotations
+
+import os
+import sys
+from pathlib import Path
+
+
+def app_data_dir() -> Path:
+    if sys.platform == "darwin":
+        base = Path.home() / "Library" / "Application Support"
+    elif os.environ.get("LOCALAPPDATA"):
+        base = Path(os.environ["LOCALAPPDATA"])
+    else:
+        base = Path.home() / "AppData" / "Local"
+    d = base / "ProxyChainManager"
+    d.mkdir(parents=True, exist_ok=True)
+    return d
+
+
+def gost_exe_path() -> Path:
+    suffix = ".exe" if sys.platform == "win32" else ""
+    return app_data_dir() / f"gost{suffix}"