Create metricflow-semantics Package

metricflow-semantics/metricflow_semantics/test_helpers/config_helpers.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import pathlib
 from dataclasses import dataclass
 
 from metricflow_semantics.test_helpers.snapshot_helpers import SnapshotConfiguration
@@ -23,3 +24,23 @@ class MetricFlowTestConfiguration(SnapshotConfiguration):
     # is created and persisted between runs. The source schema name includes a hash of the tables that should be in
     # the schema, so
     use_persistent_source_schema: bool
+
+
+class DirectoryPathAnchor:
+    """Defines a directory inside the repo.
+
+    Using this object allows you to avoid using hard-coded paths and instead use objects that will be handled properly
+    during refactoring.
+    """
+
+    def __init__(self, path_to_file_in_directory: str) -> None:
+        """Initializer.
+
+        Args:
+            path_to_file_in_directory: To be used with `__file__`.
+        """
+        self._directory = pathlib.Path(path_to_file_in_directory).parent
+
+    @property
+    def directory(self) -> pathlib.Path:  # noqa: D102
+        return self._directory

metricflow-semantics/metricflow_semantics/test_helpers/manifest_helpers.py

@@ -1,6 +1,5 @@
 from __future__ import annotations
 
-import os
 from typing import Dict, Optional
 
 from dbt_semantic_interfaces.implementations.semantic_manifest import PydanticSemanticManifest
@@ -10,16 +9,26 @@
 )
 from dbt_semantic_interfaces.validations.semantic_manifest_validator import SemanticManifestValidator
 
+from metricflow_semantics.test_helpers.semantic_manifest_yamls import SEMANTIC_MANIFEST_YAMLS_PATH_ANCHOR
+
 
 def load_semantic_manifest(
     relative_manifest_path: str,
     template_mapping: Optional[Dict[str, str]] = None,
 ) -> SemanticManifestBuildResult:
     """Reads the manifest YAMLs from the standard location, applies transformations, runs validations."""
-    yaml_file_directory = os.path.join(os.path.dirname(__file__), f"semantic_manifest_yamls/{relative_manifest_path}")
+    yaml_file_directory = SEMANTIC_MANIFEST_YAMLS_PATH_ANCHOR.directory.joinpath(relative_manifest_path)
     build_result = parse_directory_of_yaml_files_to_semantic_manifest(
-        yaml_file_directory, template_mapping=template_mapping
+        str(yaml_file_directory), template_mapping=template_mapping
     )
     validator = SemanticManifestValidator[PydanticSemanticManifest]()
     validator.checked_validations(build_result.semantic_manifest)
     return build_result
+
+
+def load_named_manifest(template_mapping: Dict[str, str], manifest_name: str) -> PydanticSemanticManifest:  # noqa: D103
+    try:
+        build_result = load_semantic_manifest(manifest_name, template_mapping)
+        return build_result.semantic_manifest
+    except Exception as e:
+        raise RuntimeError(f"Error while loading semantic manifest: {manifest_name}") from e

metricflow-semantics/metricflow_semantics/test_helpers/semantic_manifest_yamls/__init__.py

@@ -0,0 +1,5 @@
+from __future__ import annotations
+
+from metricflow_semantics.test_helpers.config_helpers import DirectoryPathAnchor
+
+SEMANTIC_MANIFEST_YAMLS_PATH_ANCHOR = DirectoryPathAnchor(__file__)