fix: read the upstream cache from one name

scripts/check_freshness.py

@@ -1057,7 +1057,7 @@ def main() -> int:
     parser.add_argument("--profiles", action="store_true", help="also run profile_sync (slow)")
     parser.add_argument("--offline", action="store_true", help="no network, local ages only")
     parser.add_argument("--jobs", type=int, default=4, help="parallel scrapers")
-    parser.add_argument("--cache-dir", default=".cache/upstream")
+    parser.add_argument("--cache-dir", default=upstream.CACHE_DIR)
     parser.add_argument("--native-cache-dir", default=export_native.DEFAULT_CACHE)
     parser.add_argument("--truth-dir", default="dist/truth")
     parser.add_argument("--platforms-dir", default="platforms")

scripts/mame_ref_audit.py

@@ -115,7 +115,7 @@ def main() -> None:
     parser = argparse.ArgumentParser(description=__doc__.splitlines()[0])
     parser.add_argument("emulators", nargs="+")
     parser.add_argument("--emulators-dir", default="emulators")
-    parser.add_argument("--cache-dir", default=".cache")
+    parser.add_argument("--cache-dir", default=upstream.CACHE_DIR)
     parser.add_argument("--offline", action="store_true")
     parser.add_argument("--write", action="store_true")
     args = parser.parse_args()

scripts/profile_sync.py

@@ -31,7 +31,7 @@ import upstream
 from common import load_emulator_profiles
 from upstream import CompareResult, find_renamed
 
-DEFAULT_CACHE = ".cache/upstream"
+DEFAULT_CACHE = upstream.CACHE_DIR
 ANON_QUOTA = 60
 TRIAGE_PATH_SAMPLE = 5
 

scripts/upstream.py

@@ -21,6 +21,8 @@ from dataclasses import dataclass
 from pathlib import Path
 
 USER_AGENT = "retrobios-profile-sync/1.0"
+# Where fetched upstream files live, shared by every reader of this cache.
+CACHE_DIR = ".cache/upstream"
 ABSENT = "\0absent\0"
 GITHUB_COMPARE_CAP = 300
 RETRIES = 3