add project names/filenames/values to rendering errors

CHANGELOG.md

@@ -1,5 +1,9 @@
 ## dbt 0.17.0 (Release TBD)
 
+### Fixes
+- Added filename, project, and the value that failed to render to the exception raised when rendering fails. ([#2499](https://github.com/fishtown-analytics/dbt/issues/2499), [#2501](https://github.com/fishtown-analytics/dbt/pull/2501))
+
+
 ### Under the hood
 - Lock protobufs to the last version that had fully functioning releases on all supported platforms ([#2490](https://github.com/fishtown-analytics/dbt/issues/2490), [#2491](https://github.com/fishtown-analytics/dbt/pull/2491))
 

core/dbt/config/renderer.py

@@ -1,9 +1,10 @@
 from typing import Dict, Any, Tuple, Optional, Union
 
-from dbt.clients.jinja import get_rendered
+from dbt.clients.jinja import get_rendered, catch_jinja
 
-from dbt.exceptions import DbtProjectError
-from dbt.exceptions import RecursionException
+from dbt.exceptions import (
+    DbtProjectError, CompilationException, RecursionException
+)
 from dbt.node_types import NodeType
 from dbt.utils import deep_map
 
@@ -35,7 +36,12 @@ def render_value(
         # if it wasn't read as a string, ignore it
         if not isinstance(value, str):
             return value
-        return get_rendered(value, self.context, native=True)
+        try:
+            with catch_jinja():
+                return get_rendered(value, self.context, native=True)
+        except CompilationException as exc:
+            msg = f'Could not render {value}: {exc.msg}'
+            raise CompilationException(msg) from exc
 
     def render_data(
         self, data: Dict[str, Any]
@@ -118,7 +124,8 @@ def render_data(
             self.version = data.get('current-version')
 
         try:
-            return deep_map(self.render_entry, data)
+            with catch_jinja():
+                return deep_map(self.render_entry, data)
         except RecursionException:
             raise DbtProjectError(
                 f'Cycle detected: {self.name} input has a reference to itself',

core/dbt/parser/schemas.py

@@ -507,7 +507,14 @@ def parse_file(self, block: FileBlock) -> None:
         # mark the file as seen, even if there are no macros in it
         self.results.get_file(block.file)
         if dct:
-            dct = self.raw_renderer.render_data(dct)
+            try:
+                dct = self.raw_renderer.render_data(dct)
+            except CompilationException as exc:
+                raise CompilationException(
+                    f'Failed to render {block.path.original_file_path} from '
+                    f'project {self.project.project_name}: {exc}'
+                ) from exc
+
             yaml_block = YamlBlock.from_file_block(block, dct)
 
             self._parse_format_version(yaml_block)