feat: support jinja in dbt vars

Author: eakmanrq

sqlmesh/dbt/context.py

@@ -105,7 +105,10 @@ def set_and_render_variables(self, variables: t.Dict[str, t.Any], package: str)
 
         def _render_var(value: t.Any) -> t.Any:
             if isinstance(value, str):
-                return jinja_environment.from_string(value).render()
+                return jinja_environment.from_string(
+                    value,
+                    jinja_environment.globals.get(package),  # type: ignore
+                ).render()
             if isinstance(value, list):
                 return [_render_var(v) for v in value]
             if isinstance(value, dict):

tests/dbt/test_config.py

@@ -8,6 +8,8 @@
 from pytest_mock import MockerFixture
 
 from sqlglot import exp
+
+from sqlmesh import Context
 from sqlmesh.core.audit import StandaloneAudit
 from sqlmesh.core.config import Config, ModelDefaultsConfig
 from sqlmesh.core.dialect import jinja_query
@@ -360,7 +362,7 @@ def test_variables(assert_exp_eq, sushi_test_project):
     # Finally, check that variable scoping & overwriting (some_var) works as expected
     expected_sushi_variables = {
         "yet_another_var": 1,
-        "top_waiters:limit": 10,
+        "top_waiters:limit": "{{ get_top_waiters_limit() }}",
         "top_waiters:revenue": "revenue",
         "customers:boo": ["a", "b"],
         "nested_vars": {
@@ -389,6 +391,11 @@ def test_variables(assert_exp_eq, sushi_test_project):
     assert sushi_test_project.packages["customers"].variables == expected_customer_variables
 
 
+@pytest.mark.slow
+def test_jinja_in_dbt_variables(sushi_test_dbt_context: Context):
+    assert sushi_test_dbt_context.render("sushi.top_waiters").sql().endswith("LIMIT 10")
+
+
 @pytest.mark.slow
 def test_nested_variables(sushi_test_project):
     model_config = ModelConfig(

tests/fixtures/dbt/sushi_test/dbt_project.yml

@@ -39,7 +39,7 @@ sources:
     identifier: false
 
 vars:
-  top_waiters:limit: 10
+  top_waiters:limit: "{{ get_top_waiters_limit() }}"
   'top_waiters:revenue': "revenue"
 
   # The following are only used for testing purposes

tests/fixtures/dbt/sushi_test/macros/top_waiters_limit.sql

@@ -0,0 +1,3 @@
+{% macro get_top_waiters_limit() %}
+10
+{% endmacro %}