cache: version the file using the library version instead

so we don't have to care about this in the future.

msys2_autobuild/utils.py

@@ -43,11 +43,16 @@ def install_requests_cache() -> Generator:
     # github sends by default with 60 seconds.
     cache_dir = os.path.join(os.getcwd(), '.autobuild_cache')
     os.makedirs(cache_dir, exist_ok=True)
+    cache_file = f'http_cache_{requests_cache.__version__}.sqlite'
+    # delete other versions
+    for f in os.listdir(cache_dir):
+        if f.startswith('http_cache_') and f != cache_file:
+            os.remove(os.path.join(cache_dir, f))
     requests_cache.install_cache(
         always_revalidate=True,
         cache_control=False,
         expire_after=requests_cache.EXPIRE_IMMEDIATELY,
-        backend=SQLiteCache(os.path.join(cache_dir, 'http_cache_2.sqlite')))
+        backend=SQLiteCache(os.path.join(cache_dir, cache_file)))
 
     # Call this once, so it gets cached from the main thread and can be used in a thread pool
     get_requests_session(nocache=True)