🐛 Wrap Jinja exceptions.

src/rybak/_types.py

@@ -7,3 +7,7 @@
 Item = TypeVar('Item')
 LoopOverFn: TypeAlias = Callable[[Iterable[Item]], Item]
 RenderFn: TypeAlias = Callable[[str, str, TemplateData], None]
+
+
+class RenderError(Exception):
+    pass

src/rybak/jinja.py

@@ -3,7 +3,7 @@
 
 import jinja2
 
-from ._types import LoopOverFn, TemplateData
+from ._types import LoopOverFn, RenderError, TemplateData
 from .adapter import RendererAdapter
 from .pycompat import Traversable
 
@@ -23,7 +23,16 @@ def render_str(self, template: str, data: TemplateData, loop_over: Optional[Loop
         env = self._env.overlay()
         env.globals['loop_over'] = loop_over
 
-        return env.from_string(template).render(**data)
+        template_obj = env.from_string(template)
+        try:
+            return template_obj.render(**data)
+        except jinja2.TemplateError as e:
+            raise RenderError from e
 
     def render_file(self, template_file: Traversable, target_file: Path, data: TemplateData) -> None:
-        target_file.write_text(self._env.get_template(str(template_file)).render(**data))
+        template_obj = self._env.get_template(str(template_file))
+        try:
+            text = template_obj.render(**data)
+        except jinja2.TemplateError as e:
+            raise RenderError from e
+        target_file.write_text(text)

src/rybak/pycompat.py

@@ -8,7 +8,7 @@
 if sys.version_info >= (3, 12):
     from importlib.resources.abc import Traversable
 else:
-    from importlib_resources.abc import Traversable
+    from importlib_resources.abc import Traversable  # type: ignore[import-not-found]
 
 if sys.version_info >= (3, 10):
     from typing import TypeAlias

tests/test_jinja_loop_nested/test_jinja_loop_nested.py

@@ -6,6 +6,7 @@
 import jinja2.loaders
 from compare import cmp_dirs
 from rybak import render
+from rybak._types import RenderError
 from rybak.jinja import JinjaAdapter
 
 
@@ -34,7 +35,7 @@ def test_gen(self):
             cmp_dirs(test_root / 'output', target_root)
 
     def test_error_missing_value(self):
-        with tempfile.TemporaryDirectory() as tmp, self.assertRaises(jinja2.UndefinedError):
+        with tempfile.TemporaryDirectory() as tmp, self.assertRaises(RenderError):
             test_root = Path(__file__).parent
             target_root = Path(tmp)
             render(