refactor: simplify error handling in get_tracked_files method

aider/main.py

@@ -17,7 +17,7 @@ from aider.format_settings import format_settings, scrub_sensitive_info
 from aider.history import ChatSummary
 from aider.io import InputOutput
 from aider.llm import litellm  # noqa: F401; properly init litellm on launch
-from aider.repo import ANY_GIT_ERROR, GitRepo, UnableToCountRepoFiles
+from aider.repo import ANY_GIT_ERROR, GitRepo
 from aider.report import report_uncaught_exceptions
 from aider.versioncheck import check_version, install_from_main_branch, install_upgrade
 
@@ -301,7 +301,7 @@ def sanity_check_repo(repo, io):
     try:
         repo.get_tracked_files()
         return True
-    except UnableToCountRepoFiles as exc:
+    except ANY_GIT_ERROR as exc:
         error_msg = str(exc)
 
         if "version in (1, 2)" in error_msg:

aider/repo.py

@@ -10,11 +10,6 @@ from aider.sendchat import simple_send_with_retries
 
 from .dump import dump  # noqa: F401
 
-
-class UnableToCountRepoFiles(Exception):
-    pass
-
-
 ANY_GIT_ERROR = (git.exc.ODBError, git.exc.GitError)
 
 
@@ -259,32 +254,29 @@ class GitRepo:
             return []
 
         try:
-            try:
-                commit = self.repo.head.commit
-            except ValueError:
-                commit = None
+            commit = self.repo.head.commit
+        except ValueError:
+            commit = None
 
-            files = set()
-            if commit:
-                if commit in self.tree_files:
-                    files = self.tree_files[commit]
-                else:
-                    for blob in commit.tree.traverse():
-                        if blob.type == "blob":  # blob is a file
-                            files.add(blob.path)
-                    files = set(self.normalize_path(path) for path in files)
-                    self.tree_files[commit] = set(files)
+        files = set()
+        if commit:
+            if commit in self.tree_files:
+                files = self.tree_files[commit]
+            else:
+                for blob in commit.tree.traverse():
+                    if blob.type == "blob":  # blob is a file
+                        files.add(blob.path)
+                files = set(self.normalize_path(path) for path in files)
+                self.tree_files[commit] = set(files)
 
-            # Add staged files
-            index = self.repo.index
-            staged_files = [path for path, _ in index.entries.keys()]
-            files.update(self.normalize_path(path) for path in staged_files)
+        # Add staged files
+        index = self.repo.index
+        staged_files = [path for path, _ in index.entries.keys()]
+        files.update(self.normalize_path(path) for path in staged_files)
 
-            res = [fname for fname in files if not self.ignored_file(fname)]
+        res = [fname for fname in files if not self.ignored_file(fname)]
 
-            return res
-        except Exception as e:
-            raise UnableToCountRepoFiles(f"Error getting tracked files: {str(e)}")
+        return res
 
     def normalize_path(self, path):
         orig_path = path