Add version resolution logic to package API

Author: jbenjoseph

src/refua_data/__init__.py

@@ -1,11 +1,38 @@
 """refua-data package API."""
 
+from importlib.metadata import version as _distribution_version
+from pathlib import Path
+import tomllib
+
 from .cache import CacheBackend, DataCache
 from .catalog import DatasetCatalog, get_default_catalog
 from .models import ApiDatasetConfig, DatasetDefinition, FetchResult, MaterializeResult
 from .pipeline import DatasetManager
 from .validation import SourceValidationResult
 
+
+def _read_version_from_pyproject() -> str | None:
+    pyproject_path = Path(__file__).resolve().parents[2] / "pyproject.toml"
+    if not pyproject_path.exists():
+        return None
+
+    data = tomllib.loads(pyproject_path.read_text(encoding="utf-8"))
+    project = data.get("project", {})
+    version = project.get("version")
+    if not version:
+        return None
+    return str(version)
+
+
+def _resolve_version() -> str:
+    local_version = _read_version_from_pyproject()
+    if local_version is not None:
+        return local_version
+    return _distribution_version("refua-data")
+
+
+__version__ = _resolve_version()
+
 __all__ = [
     "ApiDatasetConfig",
     "CacheBackend",
@@ -16,5 +43,6 @@
     "FetchResult",
     "MaterializeResult",
     "SourceValidationResult",
+    "__version__",
     "get_default_catalog",
 ]