Merge pull request #2381 from mark-asymbl/write_text_file_lock_fix

Added io.py write_text exponential backoff to gracefully handle transient file locks

aider/io.py

@@ -333,14 +333,31 @@ class InputOutput:
             self.tool_error("Use --encoding to set the unicode encoding.")
             return
 
-    def write_text(self, filename, content):
+    def write_text(self, filename, content, max_retries=5, initial_delay=0.1):
+        """
+        Writes content to a file, retrying with progressive backoff if the file is locked.
+
+        :param filename: Path to the file to write.
+        :param content: Content to write to the file.
+        :param max_retries: Maximum number of retries if a file lock is encountered.
+        :param initial_delay: Initial delay (in seconds) before the first retry.
+        """
         if self.dry_run:
             return
-        try:
-            with open(str(filename), "w", encoding=self.encoding) as f:
-                f.write(content)
-        except OSError as err:
-            self.tool_error(f"Unable to write file {filename}: {err}")
+
+        delay = initial_delay
+        for attempt in range(max_retries):
+            try:
+                with open(str(filename), "w", encoding=self.encoding) as f:
+                    f.write(content)
+                return  # Successfully wrote the file
+            except OSError as err:
+                if attempt < max_retries - 1:
+                    time.sleep(delay)
+                    delay *= 2  # Exponential backoff
+                else:
+                    self.tool_error(f"Unable to write file {filename} after {max_retries} attempts: {err}")
+                    raise
 
     def rule(self):
         if self.pretty: