refactor: rename CACHE_DIR → DATA_DIR, container path .if_cache → data (#21)

* refactor: rename CACHE_DIR to DATA_DIR, default path .if_cache → data

CACHE_DIR held both the embedding cache and the SQLite tracker DB, making
the name misleading. DATA_DIR is more accurate.

- Config reads DATA_DIR first; falls back to CACHE_DIR with a deprecation
  warning so existing setups don't break on upgrade
- Default local path: data (was .if_cache)
- Docker default path: /app/data (was /app/.if_cache)
- Internal references (embeddings.py, upload_tracker.py) updated to DATA_DIR
- compose.yml, .env.example, README, wiki, and changelog updated
- Version bumped to 0.5.1

* chore: update lockfile

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

.env.example

@@ -34,7 +34,7 @@ STRATEGY=adaptive
 # ── Caching & Models ──────────────────────────────────────────────────────────
 # FORCE_CPU=true              # Disable GPU, fall back to CPU
 # ENABLE_CACHE=false          # Disable embedding cache (default: true)
-CACHE_DIR=/app/.if_cache
+DATA_DIR=/app/data
 INSIGHTFACE_HOME=/models/.insightface
 
 # ── Tracker overrides (one-shot — remove after use) ───────────────────────────

CHANGELOG.md

@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.5.1] - 2026-06-14
+
+### Changed
+
+- **`CACHE_DIR` renamed to `DATA_DIR`**: the environment variable that sets the path for the embedding cache and SQLite tracker database is now called `DATA_DIR` (default: `data`; Docker default: `/app/data`). The old `CACHE_DIR` still works with a startup deprecation warning — rename it to `DATA_DIR` in your `.env` or `compose.yml` to silence the warning. The container-side default path changes from `/app/.if_cache` to `/app/data`; update your volume mount accordingly.
+
 ## [0.5.0] - 2026-06-14
 
 ### Changed

README.md

@@ -27,7 +27,7 @@ Immich library
       │
       ▼
 2. Filter by recency (YEARS_FILTER) and skip already-uploaded
-   and rejected assets (persistent tracker in CACHE_DIR)
+   and rejected assets (persistent tracker in DATA_DIR)
       │
       ▼
 3. Quality filter — download preview thumbnails and reject:
@@ -74,7 +74,7 @@ Immich library
    ↳ at cap + QUALITY_REPLACEMENT=false — skip this person
 ```
 
-Uploaded and rejected asset IDs are persisted across runs in a SQLite database (`winnow_tracker.db` in `CACHE_DIR`). The same image is never processed twice; rejected assets are permanently skipped unless `RETRY_REJECTED=true`.
+Uploaded and rejected asset IDs are persisted across runs in a SQLite database (`winnow_tracker.db` in `DATA_DIR`). The same image is never processed twice; rejected assets are permanently skipped unless `RETRY_REJECTED=true`.
 
 ---
 
@@ -103,7 +103,7 @@ services:
       - CRON_SCHEDULE=0 3 * * 0
     volumes:
       - /path/to/models:/models    # INSIGHTFACE_HOME — persists Buffalo_L model (~300 MB)
-      - /path/to/cache:/app/.if_cache
+      - /path/to/data:/app/data
       - /path/to/output:/app/frigate_train
     deploy:
       resources:
@@ -212,7 +212,7 @@ These defaults are tuned for Frigate's ArcFace requirements. winnow will warn on
 | `FORCE_CPU` | `false` | Disable GPU — fall back to CPU for all inference |
 | `OPENVINO_DEVICE` | `CPU` | Intel variant only: set `GPU` to use Arc or iGPU; default runs on CPU |
 | `ENABLE_CACHE` | `true` | Cache computed embeddings to disk (speeds up re-runs on the same library) |
-| `CACHE_DIR` | `.if_cache` | Path for embedding cache and upload tracker database (`winnow_tracker.db`) |
+| `DATA_DIR` | `data` | Path for embedding cache and upload tracker database (`winnow_tracker.db`) |
 | `INSIGHTFACE_HOME` | *(system)* | InsightFace model cache path (Buffalo_L) |
 
 ### Output

compose.yml

@@ -37,7 +37,7 @@ services:
       # - FORCE_CPU=true              # Disable GPU, fall back to CPU
       # - OPENVINO_DEVICE=GPU         # Intel variant only: use Arc/iGPU instead of CPU (default: CPU)
       # - ENABLE_CACHE=false          # Disable embedding cache (default: true)
-      - CACHE_DIR=/app/.if_cache
+      - DATA_DIR=/app/data
       - INSIGHTFACE_HOME=/models/.insightface
 
       # ── Tracker overrides (one-shot, remove after use) ────────────────────
@@ -57,7 +57,7 @@ services:
     volumes:
       # Replace with absolute paths on your host, e.g. /opt/winnow/models
       - /path/to/winnow/models:/models
-      - /path/to/winnow/cache:/app/.if_cache
+      - /path/to/winnow/data:/app/data
       - /path/to/winnow/output:/app/frigate_train
     restart: unless-stopped
 

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "winnow"
-version = "0.5.0"
+version = "0.5.1"
 description = "Selects diverse, high-quality photos from Immich as training data for Frigate face recognition."
 license = "AGPL-3.0-or-later"
 requires-python = ">=3.13"

tests/test_upload_tracker.py

@@ -7,7 +7,7 @@ import pytest
 @pytest.fixture(autouse=True)
 def isolated_cache(monkeypatch, tmp_path):
     """Point tracker at a temp directory so tests don't touch real cache files."""
-    monkeypatch.setenv("CACHE_DIR", str(tmp_path))
+    monkeypatch.setenv("DATA_DIR", str(tmp_path))
     from winnow.config import _Config
     _Config.reset()
     # Also reset the SQLite connection so the next call opens the new path

uv.lock

@@ -862,7 +862,7 @@ wheels = [
 
 [[package]]
 name = "winnow"
-version = "0.5.0"
+version = "0.5.1"
 source = { editable = "." }
 dependencies = [
     { name = "croniter" },

winnow/config.py

@@ -47,7 +47,7 @@ class _Config:
     ENABLE_FACE_ALIGNMENT: bool
 
     ENABLE_CACHE: bool
-    CACHE_DIR: str
+    DATA_DIR: str
 
     def __new__(cls) -> "_Config":
         if cls._instance is None:
@@ -99,7 +99,17 @@ class _Config:
         self.USE_FULL_RESOLUTION = os.getenv("USE_FULL_RESOLUTION", "true").lower() in ("true", "1", "yes")
         self.ENABLE_FACE_ALIGNMENT = os.getenv("ENABLE_FACE_ALIGNMENT", "true").lower() in ("true", "1", "yes")
         self.ENABLE_CACHE = os.getenv("ENABLE_CACHE", "true").lower() in ("true", "1", "yes")
-        self.CACHE_DIR = os.getenv("CACHE_DIR", ".if_cache")
+        _data_dir = os.getenv("DATA_DIR")
+        _cache_dir_legacy = os.getenv("CACHE_DIR")
+        if _data_dir:
+            self.DATA_DIR = _data_dir
+        elif _cache_dir_legacy:
+            logging.warning(
+                "CACHE_DIR is deprecated — rename it to DATA_DIR in your .env or compose.yml"
+            )
+            self.DATA_DIR = _cache_dir_legacy
+        else:
+            self.DATA_DIR = "data"
 
         # Fall back to config file only when the env var is genuinely absent (None).
         # An explicitly empty env var (IMMICH_URL="") takes priority over the file.

winnow/embeddings.py

@@ -214,7 +214,7 @@ def get_embedding(
     from .config import Config
 
     use_cache = Config.ENABLE_CACHE and asset_id is not None
-    cache = get_cache(Config.CACHE_DIR) if use_cache else None
+    cache = get_cache(Config.DATA_DIR) if use_cache else None
 
     if cache:
         cached = cache.get(asset_id, "insightface")

winnow/upload_tracker.py

@@ -1,6 +1,6 @@
 """Persistent tracker for Immich asset IDs uploaded/rejected by Frigate.
 
-Uses a local SQLite database (frigate_tracker.db) in CACHE_DIR.
+Uses a local SQLite database (frigate_tracker.db) in DATA_DIR.
 
 Schema
 ------
@@ -53,7 +53,7 @@ CREATE TABLE IF NOT EXISTS person_metadata (
 );
 """
 
-# Module-level connection state — re-opened when CACHE_DIR changes (test isolation)
+# Module-level connection state — re-opened when DATA_DIR changes (test isolation)
 _conn: sqlite3.Connection | None = None
 _conn_path: str | None = None
 
@@ -61,15 +61,15 @@ _conn_path: str | None = None
 def _get_conn() -> sqlite3.Connection:
     """Return (or create) the module-level SQLite connection.
 
-    Re-opens the connection when Config.CACHE_DIR has changed — this provides
+    Re-opens the connection when Config.DATA_DIR has changed — this provides
     test isolation when the isolated_cache fixture sets a new tmp directory and
     calls _Config.reset().
     """
     global _conn, _conn_path
 
     from .config import Config
-    cache_dir = Config.CACHE_DIR
-    db_path = str(Path(cache_dir) / _DB_NAME)
+    data_dir = Config.DATA_DIR
+    db_path = str(Path(data_dir) / _DB_NAME)
 
     if _conn is not None and _conn_path != db_path:
         try:
@@ -79,7 +79,7 @@ def _get_conn() -> sqlite3.Connection:
         _conn = None
 
     if _conn is None:
-        Path(cache_dir).mkdir(parents=True, exist_ok=True)
+        Path(data_dir).mkdir(parents=True, exist_ok=True)
         _conn = sqlite3.connect(db_path, check_same_thread=False)
         _conn.row_factory = sqlite3.Row
         _conn.execute("PRAGMA journal_mode=WAL")
@@ -87,7 +87,7 @@ def _get_conn() -> sqlite3.Connection:
         _conn.executescript(_DDL)
         _conn.commit()
         _conn_path = db_path
-        _maybe_migrate(cache_dir, _conn)
+        _maybe_migrate(data_dir, _conn)
 
     return _conn
 
@@ -96,9 +96,9 @@ def _get_conn() -> sqlite3.Connection:
 # JSON → SQLite migration
 # ---------------------------------------------------------------------------
 
-def _maybe_migrate(cache_dir: str, conn: sqlite3.Connection) -> None:
+def _maybe_migrate(data_dir: str, conn: sqlite3.Connection) -> None:
     """If the old JSON files exist and DB is empty, migrate and rename them."""
-    base = Path(cache_dir)
+    base = Path(data_dir)
     upload_json = base / _UPLOAD_JSON
     reject_json = base / _REJECT_JSON
 
@@ -110,7 +110,7 @@ def _maybe_migrate(cache_dir: str, conn: sqlite3.Connection) -> None:
     # (e.g. a PermissionError on the second rename would have left the first file's
     # data committed but the second file un-renamed and un-migrated).
 
-    logger.info("Migrating JSON tracker files to SQLite in %s", cache_dir)
+    logger.info("Migrating JSON tracker files to SQLite in %s", data_dir)
 
     try:
         with conn: