refactor(config): search yaml using pathlib.Path.parents (#172)

* refactor: search yaml using `pathlib.Path.parents`

Signed-off-by: Pablo Woolvett <pablowoolvett@gmail.com>

* Update config.py

fixit/common/config.py

@@ -9,7 +9,7 @@
 from dataclasses import asdict
 from functools import lru_cache
 from pathlib import Path
-from typing import Any, Dict, Optional, Pattern, Set
+from typing import Any, Dict, Pattern, Set
 
 import yaml
 
@@ -114,23 +114,19 @@ def get_validated_settings(
 @lru_cache()
 def get_lint_config() -> LintConfig:
     config = {}
-    current_dir = Path.cwd()
-    previous_dir: Optional[Path] = None
-    while current_dir != previous_dir:
+
+    cwd = Path.cwd()
+    for directory in (cwd, *cwd.parents):
         # Check for config file.
-        possible_config = current_dir / LINT_CONFIG_FILE_NAME
+        possible_config = directory / LINT_CONFIG_FILE_NAME
         if possible_config.is_file():
             with open(possible_config, "r") as f:
                 file_content = yaml.safe_load(f.read())
 
             if isinstance(file_content, dict):
-                config = get_validated_settings(file_content, current_dir)
+                config = get_validated_settings(file_content, directory)
                 break
 
-        # Try to go up a directory.
-        previous_dir = current_dir
-        current_dir = current_dir.parent
-
     # Find formatter executable if there is one.
     formatter_args = config.get("formatter", DEFAULT_FORMATTER)
     exe = distutils.spawn.find_executable(formatter_args[0]) or formatter_args[0]