fix: catch syntax errors in ast parse

src/sqlfmt/jinjafmt.py

@@ -286,10 +286,12 @@ def _basic_str(self) -> str:
         return f"{self.opening_marker} {self.verb}{self.code} {self.closing_marker}"
 
     def _find_multiline_python_str_lines(self) -> MutableSet[int]:
-        # we don't have to worry about syntax errors here because black has already
-        # run on this code.
-        tree = ast.parse(self.code, mode="eval")
-
+        try:
+            tree = ast.parse(self.code, mode="eval")
+        except SyntaxError:
+            # this jinja isn't quite python, so give up here.
+            return set()
+
         line_indicies: MutableSet[int] = set()
         for node in ast.walk(tree):
             if (

tests/unit_tests/test_jinjafmt.py

@@ -482,15 +482,18 @@ def test_preprocess_and_postprocess_are_inverse_ops(source_string: str) -> None:
         *BlackWrapper._preprocess_string(source_string)
     ).replace(" ", "") == source_string.replace(" ", "")
 
+
 @pytest.mark.parametrize(
     "source_string",
     [
-    """{{\n    config(\n        foo="bar",\n    )\n}}""",
-    '''{{\n    config(\n        foo="""\n\nbar\n\n""",\n    )\n}}''',
-    ]
+        """{{\n    config(\n        foo="bar",\n    )\n}}""",
+        '''{{\n    config(\n        foo="""\n\nbar\n\n""",\n    )\n}}''',
+    ],
 )
 def test_multiline_str(source_string: str) -> None:
     tag = JinjaTag.from_string(source_string=source_string, depth=(0, 0))
-    tag.code, tag.is_blackened = BlackWrapper().format_string(source_string=tag.code, max_length=88)
+    tag.code, tag.is_blackened = BlackWrapper().format_string(
+        source_string=tag.code, max_length=88
+    )
     assert tag.is_blackened
     assert str(tag) == source_string