Improve error handling in get_counts_for_file function to gracefully handle files that cannot be blamed.

scripts/blame.py

@@ -47,7 +47,6 @@ def get_all_commit_hashes_between_tags(start_tag, end_tag=None):
         return commit_hashes
 
 def run(cmd):
-    try:
     # Get all commit hashes since the specified tag
     result = subprocess.run(
         cmd,
@@ -56,9 +55,6 @@ def run(cmd):
         check=True
     )
     return result.stdout
-    except subprocess.CalledProcessError as e:
-        print(f"Error: {e}", file=sys.stderr)
-        return
 
 def get_commit_authors(commits):
     commit_to_author = dict()
@@ -97,6 +93,7 @@ def main():
         print(f"\nAider wrote {aider_percentage:.0f}% of the code in this release ({aider_total}/{total_lines} lines).")
 
 def get_counts_for_file(start_tag, end_tag, authors, fname):
+    try:
         if end_tag:
             text = run(['git', 'blame', f'{start_tag}..{end_tag}', '--', fname])
         else:
@@ -116,6 +113,9 @@ def get_counts_for_file(start_tag, end_tag, authors, fname):
             line_counts[author] += 1
 
         return dict(line_counts)
+    except subprocess.CalledProcessError:
+        print(f"Warning: Unable to blame file {fname}. It may have been added after {start_tag} or removed before {end_tag or 'HEAD'}.", file=sys.stderr)
+        return None
 
 def get_all_tags_since(start_tag):
     all_tags = run(['git', 'tag', '--sort=v:refname']).strip().split('\n')