Render source_description fields in sources (#1484)

core/dbt/parser/util.py

@@ -1,6 +1,7 @@
 
 import dbt.exceptions
 import dbt.utils
+from dbt.node_types import NodeType
 
 
 def docs(node, manifest, config, column_name=None):
@@ -146,10 +147,27 @@ def process_docs_for_node(cls, manifest, current_project, node):
             else:
                 column['description'] = description
 
+    @classmethod
+    def process_docs_for_source(cls, manifest, current_project, source):
+        context = {
+            'doc': docs(source, manifest, current_project),
+        }
+        table_description = source.get('description', '')
+        source_description = source.get('source_description', '')
+        table_description = dbt.clients.jinja.get_rendered(table_description,
+                                                           context)
+        source_description = dbt.clients.jinja.get_rendered(source_description,
+                                                            context)
+        source.set('description', table_description)
+        source.set('source_description', source_description)
+
     @classmethod
     def process_docs(cls, manifest, current_project):
         for node in manifest.nodes.values():
-            cls.process_docs_for_node(manifest, current_project, node)
+            if node.resource_type == NodeType.Source:
+                cls.process_docs_for_source(manifest, current_project, node)
+            else:
+                cls.process_docs_for_node(manifest, current_project, node)
         return manifest
 
     @classmethod

test/integration/029_docs_generate_tests/test_docs_generate.py

@@ -1266,7 +1266,7 @@ def expected_postgres_references_manifest(self, model_database=None):
                     'resource_type': 'source',
                     'root_path': os.getcwd(),
                     'schema': my_schema_name,
-                    'source_description': "{{ doc('source_info') }}",
+                    'source_description': 'My source',
                     'source_name': 'my_source',
                     'unique_id': 'source.test.my_source.my_table'
                 }