use is_relative_to instead of try/except

Author: frenata

bough/analyzer.py

@@ -165,12 +165,11 @@ def _find_direct_packages(
         directly_affected = set()
         strip_prefix = self.workspace_root.relative_to(self.repo_root)
         for file_path in changed_files:
-            try:
+            if Path(file_path).is_relative_to(strip_prefix):
                 file_path_obj = Path(file_path).relative_to(strip_prefix)
-            except ValueError as e:
-                if "is not in the subpath" in str(e):
-                    logger.debug("Ignoring file {file_path} outside of workspace")
-                    continue
+            else:
+                logger.debug(f"Ignoring file {file_path} outside of workspace")
+                continue
 
             if self._matches_patterns(file_path, self.config.ignore):
                 logger.debug(f"Ignoring file {file_path} (matches ignore patterns)")