fix: ignore empty YAML documents in copier.yml

copier/template.py

@@ -88,7 +88,7 @@ class _Loader(yaml.FullLoader):
 
     with conf_path.open("rb") as f:
         try:
-            flattened_result = lflatten(yaml.load_all(f, Loader=_Loader))
+            flattened_result = lflatten(filter(None, yaml.load_all(f, Loader=_Loader)))
         except yaml.parser.ParserError as e:
             raise InvalidConfigFileError(conf_path, quiet) from e
 

tests/test_config.py

@@ -191,6 +191,32 @@ def test_valid_multi_section(tmp_path: Path) -> None:
     }
 
 
+def test_empty_section(tmp_path: Path) -> None:
+    """Empty sections are ignored."""
+    build_file_tree(
+        {
+            (tmp_path / "copier.yml"): (
+                """\
+                ---
+                ---
+
+                ---
+                your_age:
+                    type: int
+                your_name:
+                    type: str
+                ---
+                """
+            ),
+        }
+    )
+    template = Template(str(tmp_path))
+    assert template.questions_data == {
+        "your_age": {"type": "int"},
+        "your_name": {"type": "str"},
+    }
+
+
 def test_config_data_empty() -> None:
     template = Template("tests/demo_config_empty")
     assert template.config_data == {}