fix: rename liquid_variable -> liquid_variables

metadata-ingestion/docs/sources/looker/looker_recipe.yml

@@ -9,7 +9,7 @@ source:
     client_secret: ${LOOKER_CLIENT_SECRET}
 
     # Liquid variables
-    # liquid_variable:
+    # liquid_variables:
     #   _user_attributes:
     #     looker_env: "dev"
     #     dev_database_prefix: "employee"

metadata-ingestion/docs/sources/looker/lookml_post.md

@@ -1,9 +1,9 @@
 #### Configuration Notes
 
-1. If a view contains a liquid template (e.g. `sql_table_name: {{ user_attributes['db']}}.kafka_streaming.events }}`, with `db=ANALYTICS_PROD`), then you will need to specify the values of those variables in the `liquid_variable` config as shown below:
+1. If a view contains a liquid template (e.g. `sql_table_name: {{ user_attributes['db']}}.kafka_streaming.events }}`, with `db=ANALYTICS_PROD`), then you will need to specify the values of those variables in the `liquid_variables` config as shown below:
 
    ```yml
-   liquid_variable:
+   liquid_variables:
      user_attributes:
        db: ANALYTICS_PROD
    ```

metadata-ingestion/src/datahub/ingestion/source/looker/looker_template_language.py

@@ -269,7 +269,7 @@
     def _apply_transformation(self, value: str, view: dict) -> str:
         return resolve_liquid_variable(
             text=value,
-            liquid_variable=self.source_config.liquid_variable,
+            liquid_variable=self.source_config.liquid_variables,
             report=self.reporter,
         )
 
@@ -385,13 +385,13 @@
                 return str(self.source_config.lookml_constants.get(key))
 
             # Check if it's a misplaced lookml constant
-            if key in self.source_config.liquid_variable:
+            if key in self.source_config.liquid_variables:
                 self.reporter.report_warning(
                     title="Misplaced lookml constant",
                     message="Misplaced lookml constant, Use 'lookml_constants' instead of 'liquid_variables'.",
                     context=f"Key {key}",
                 )
                 return f"@{{{key}}}"
 
             logger.warning(f"Constant '@{{{key}}}' not found in configuration.")
             return "NULL"

metadata-ingestion/src/datahub/ingestion/source/looker/lookml_config.py

@@ -158,13 +158,17 @@ class LookMLSourceConfig(
         description="When enabled, looker refinement will be processed to adapt an existing view.",
     )
 
-    liquid_variable: Dict[Any, Any] = Field(
+    liquid_variables: Dict[Any, Any] = Field(
         {},
         description="A dictionary containing Liquid variables, Liquid logic, and LookML parameters with their corresponding values, utilized in SQL-defined "
         "derived views. The Liquid template will be resolved in view.derived_table.sql and "
         "view.sql_table_name. Defaults to an empty dictionary.",
     )
 
+    _liquid_variable_deprecated = pydantic_renamed_field(
+        old_name="liquid_variable", new_name="liquid_variables", print_warning=True
+    )
+
     lookml_constants: Dict[str, str] = Field(
         {},
         description=(