Use platformdirs for cpuinfo cache

pyproject.toml

@@ -37,6 +37,7 @@ dependencies = [
     "numexpr",
     "py-cpuinfo",
     "httpx",
+    "platformdirs",
 ]
 version = "3.0.1.dev"
 

src/blosc2/core.py

@@ -21,10 +21,11 @@
 import sys
 from dataclasses import asdict
 from functools import lru_cache
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Any
 
 import cpuinfo
 import numpy as np
+import platformdirs
 
 import blosc2
 from blosc2 import blosc2_ext
@@ -36,6 +37,12 @@
     import torch
 
 
+_USER_CACHE_DIR: pathlib.Path = platformdirs.user_cache_path(
+    appname="python-blosc2",
+    appauthor="blosc",
+)
+
+
 def _check_typesize(typesize):
     if not 1 <= typesize <= blosc2_ext.MAX_TYPESIZE:
         raise ValueError(f"typesize can only be in the 1-{blosc2_ext.MAX_TYPESIZE} range.")
@@ -1170,14 +1177,15 @@ def _get_cpu_info():
     return cpu_info
 
 
-def write_cached_cpu_info(cpu_info_dict: dict[str, any]) -> None:
-    with open(pathlib.Path.home() / ".blosc2-cpuinfo.json", "w") as f:
+def write_cached_cpu_info(cpu_info_dict: dict[str, Any]) -> None:
+    _USER_CACHE_DIR.mkdir(parents=True, exist_ok=True)
+    with (_USER_CACHE_DIR / "cpuinfo.json").open("w") as f:
         json.dump(cpu_info_dict, f, indent=4)
 
 
-def read_cached_cpu_info() -> dict:
+def read_cached_cpu_info() -> dict[str, Any]:
     try:
-        with open(pathlib.Path.home() / ".blosc2-cpuinfo.json") as f:
+        with (_USER_CACHE_DIR / "cpuinfo.json").open() as f:
             return json.load(f)
     except (FileNotFoundError, json.JSONDecodeError):
         return {}