Behavior change for mf timespine without yaml configuration

.changes/unreleased/Under the Hood-20241016-110321.yaml

@@ -0,0 +1,6 @@
+kind: Under the Hood
+body: Behavior change for mf timespine without yaml configuration
+time: 2024-10-16T11:03:21.123552-05:00
+custom:
+    Author: DevonFulcher
+    Issue: None

.gitignore

@@ -105,3 +105,6 @@ venv/
 
 # poetry
 poetry.lock
+
+# asdf
+.tool-versions

core/dbt/contracts/graph/semantic_manifest.py

@@ -1,5 +1,6 @@
 from typing import List, Optional
 
+from dbt import deprecations
 from dbt.constants import (
     LEGACY_TIME_SPINE_GRANULARITY,
     LEGACY_TIME_SPINE_MODEL_NAME,
@@ -9,6 +10,7 @@
 from dbt.contracts.graph.nodes import ModelNode
 from dbt.events.types import ArtifactWritten, SemanticValidationFailure
 from dbt.exceptions import ParsingError
+from dbt.flags import get_flags
 from dbt_common.clients.system import write_file
 from dbt_common.events.base_types import EventLevel
 from dbt_common.events.functions import fire_event
@@ -58,6 +60,22 @@ def validate(self) -> bool:
         semantic_manifest = self._get_pydantic_semantic_manifest()
         validator = SemanticManifestValidator[PydanticSemanticManifest]()
         validation_results = validator.validate_semantic_manifest(semantic_manifest)
+        time_spines = semantic_manifest.project_configuration.time_spines
+        legacy_time_spines = (
+            semantic_manifest.project_configuration.time_spine_table_configurations
+        )
+        # If the time spine contains a day grain then it is functionally equivalent to the legacy time spine.
+        time_spines_contain_day = any(
+            c for c in time_spines if c.primary_column.time_granularity == TimeGranularity.DAY
+        )
+        if (
+            get_flags().require_yaml_configuration_for_mf_time_spines is False
+            and legacy_time_spines
+            and not time_spines_contain_day
+        ):
+            deprecations.warn(
+                "mf-timespine-without-yaml-configuration",
+            )
 
         for warning in validation_results.warnings:
             fire_event(SemanticValidationFailure(msg=warning.message))

core/dbt/contracts/project.py

@@ -344,6 +344,7 @@ class ProjectFlags(ExtensibleDbtClassMixin):
     skip_nodes_if_on_run_start_fails: bool = False
     state_modified_compare_more_unrendered_values: bool = False
     state_modified_compare_vars: bool = False
+    require_yaml_configuration_for_mf_time_spines: bool = False
 
     @property
     def project_only_flags(self) -> Dict[str, Any]:
@@ -354,6 +355,7 @@ def project_only_flags(self) -> Dict[str, Any]:
             "skip_nodes_if_on_run_start_fails": self.skip_nodes_if_on_run_start_fails,
             "state_modified_compare_more_unrendered_values": self.state_modified_compare_more_unrendered_values,
             "state_modified_compare_vars": self.state_modified_compare_vars,
+            "require_yaml_configuration_for_mf_time_spines": self.require_yaml_configuration_for_mf_time_spines,
         }
 
 

core/dbt/deprecations.py

@@ -118,6 +118,11 @@ class SourceFreshnessProjectHooksNotRun(DBTDeprecation):
     _event = "SourceFreshnessProjectHooksNotRun"
 
 
+class MFTimespineWithoutYamlConfigurationDeprecation(DBTDeprecation):
+    _name = "mf-timespine-without-yaml-configuration"
+    _event = "MFTimespineWithoutYamlConfigurationDeprecation"
+
+
 def renamed_env_var(old_name: str, new_name: str):
     class EnvironmentVariableRenamed(DBTDeprecation):
         _name = f"environment-variable-renamed:{old_name}"
@@ -166,6 +171,7 @@ def show_callback():
     PackageMaterializationOverrideDeprecation(),
     ResourceNamesWithSpacesDeprecation(),
     SourceFreshnessProjectHooksNotRun(),
+    MFTimespineWithoutYamlConfigurationDeprecation(),
 ]
 
 deprecations: Dict[str, DBTDeprecation] = {d.name: d for d in deprecations_list}

core/dbt/events/README.md

@@ -1,5 +1,5 @@
 # Events Module
-The Events module is responsible for communicating internal dbt structures into a consumable interface. Because the "event" classes are based entirely on protobuf definitions, the interface is really clearly defined, whether or not protobufs are used to consume it. We use Betterproto for compiling the protobuf message definitions into Python classes.
+The Events module is responsible for communicating internal dbt structures into a consumable interface. Because the "event" classes are based entirely on protobuf definitions, the interface is really clearly defined, whether or not protobufs are used to consume it. We use protoc for compiling the protobuf message definitions into Python classes.
 
 # Using the Events Module
 The event module provides types that represent what is happening in dbt in `events.types`. These types are intended to represent an exhaustive list of all things happening within dbt that will need to be logged, streamed, or printed. To fire an event, `common.events.functions::fire_event` is the entry point to the module from everywhere in dbt.
@@ -8,14 +8,14 @@ The event module provides types that represent what is happening in dbt in `even
 When events are processed via `fire_event`, nearly everything is logged. Whether or not the user has enabled the debug flag, all debug messages are still logged to the file. However, some events are particularly time consuming to construct because they return a huge amount of data. Today, the only messages in this category are cache events and are only logged if the `--log-cache-events` flag is on. This is important because these messages should not be created unless they are going to be logged, because they cause a noticable performance degredation. These events use a "fire_event_if" functions.
 
 # Adding a New Event
-* Add a new message in types.proto, and a second message with the same name + "Msg". The "Msg" message should have two fields, an "info" field of EventInfo, and a "data" field referring to the message name without "Msg"
+* Add a new message in `core_types.proto`, and a second message with the same name + "Msg". The "Msg" message should have two fields, an "info" field of EventInfo, and a "data" field referring to the message name without "Msg"
 * run the protoc compiler to update core_types_pb2.py:   make core_proto_types
 * Add a wrapping class in core/dbt/event/core_types.py with a Level superclass  plus code and message methods
 * Add the class to tests/unit/test_events.py
 
 We have switched from using betterproto to using google protobuf, because of a lack of support for Struct fields in betterproto.
 
-The google protobuf interface is janky and very much non-Pythonic. The "generated" classes in types_pb2.py do not resemble regular Python classes. They do not have normal constructors; they can only be constructed empty. They can be "filled" by setting fields individually or using a json_format method like ParseDict.  We have wrapped the logging events with a class (in types.py) which allows using a constructor -- keywords only, no positional parameters. 
+The google protobuf interface is janky and very much non-Pythonic. The "generated" classes in types_pb2.py do not resemble regular Python classes. They do not have normal constructors; they can only be constructed empty. They can be "filled" by setting fields individually or using a json_format method like ParseDict.  We have wrapped the logging events with a class (in types.py) which allows using a constructor -- keywords only, no positional parameters.
 
 ## Required for Every Event
 
@@ -37,6 +37,6 @@ class PartialParsingDeletedExposure(DebugLevel):
 
 ## Compiling core_types.proto
 
-After adding a new message in `types.proto`, either:
+After adding a new message in `core_types.proto`, either:
 - In the repository root directory: `make core_proto_types`
 - In the `core/dbt/events` directory: `protoc -I=. --python_out=. types.proto`

core/dbt/events/core_types.proto

@@ -445,6 +445,14 @@ message SourceFreshnessProjectHooksNotRunMsg {
     SourceFreshnessProjectHooksNotRun data = 2;
 }
 
+// D018
+message MFTimespineWithoutYamlConfigurationDeprecation {}
+
+message MFTimespineWithoutYamlConfigurationDeprecationMsg {
+    CoreEventInfo info = 1;
+    MFTimespineWithoutYamlConfigurationDeprecation data = 2;
+}
+
 // I065
 message DeprecatedModel {
     string model_name = 1;

core/dbt/events/types.py

@@ -466,6 +466,16 @@ def message(self) -> str:
         return line_wrap_message(warning_tag(description))
 
 
+class MFTimespineWithoutYamlConfigurationDeprecation(WarnLevel):
+    def code(self) -> str:
+        return "D018"
+
+    def message(self) -> str:
+        description = "Time spines without YAML configuration are in the process of deprecation. Please add YAML configuration for your 'metricflow_time_spine' model. See documentation on MetricFlow time spines: https://docs.getdbt.com/docs/build/metricflow-time-spine and behavior change documentation: https://docs.getdbt.com/reference/global-configs/behavior-changes."
+
+        return line_wrap_message(warning_tag(description))
+
+
 # =======================================================
 # I - Project parsing
 # =======================================================

core/setup.py

@@ -69,7 +69,7 @@
         # These are major-version-0 packages also maintained by dbt-labs.
         # Accept patches but avoid automatically updating past a set minor version range.
         "dbt-extractor>=0.5.0,<=0.6",
-        "dbt-semantic-interfaces>=0.7.3,<0.8",
+        "dbt-semantic-interfaces>=0.7.4,<0.8",
         # Minor versions for these are expected to be backwards-compatible
         "dbt-common>=1.11.0,<2.0",
         "dbt-adapters>=1.8.0,<2.0",

tests/unit/contracts/graph/test_semantic_manifest.py

@@ -1,5 +1,9 @@
+from unittest.mock import patch
+
 import pytest
 
+from core.dbt.contracts.graph.manifest import Manifest
+from core.dbt.contracts.graph.nodes import ModelNode
 from dbt.contracts.graph.semantic_manifest import SemanticManifest
 
 
@@ -24,6 +28,21 @@ def metrics(
 
 
 class TestSemanticManifest:
+
     def test_validate(self, manifest):
-        sm_manifest = SemanticManifest(manifest)
-        assert sm_manifest.validate()
+        with patch("dbt.contracts.graph.semantic_manifest.get_flags") as patched_get_flags:
+            patched_get_flags.return_value.require_yaml_configuration_for_mf_time_spines = True
+            sm_manifest = SemanticManifest(manifest)
+            assert sm_manifest.validate()
+
+    def test_require_yaml_configuration_for_mf_time_spines(
+        self, manifest: Manifest, metricflow_time_spine_model: ModelNode
+    ):
+        with patch("dbt.contracts.graph.semantic_manifest.get_flags") as patched_get_flags, patch(
+            "dbt.contracts.graph.semantic_manifest.deprecations"
+        ) as patched_deprecations:
+            patched_get_flags.return_value.require_yaml_configuration_for_mf_time_spines = False
+            manifest.nodes[metricflow_time_spine_model.unique_id] = metricflow_time_spine_model
+            sm_manifest = SemanticManifest(manifest)
+            assert sm_manifest.validate()
+            assert patched_deprecations.warn.call_count == 1

tests/unit/test_events.py

@@ -157,6 +157,7 @@ def test_event_codes(self):
         package_name="my_package", materialization_name="view"
     ),
     core_types.SourceFreshnessProjectHooksNotRun(),
+    core_types.MFTimespineWithoutYamlConfigurationDeprecation(),
     # E - DB Adapter ======================
     adapter_types.AdapterEventDebug(),
     adapter_types.AdapterEventInfo(),