1197 failed to update new codes from gpte

[similato87]

Description

This PR addresses the problem outlined in issue #1197, where users encountered key errors when validating diffs. The root cause of the issue was that the Large Language Model (LLM) provided consecutive diffs for the same file, leading to conflicts.

Background

The problem was traced back to the LLM not adhering strictly to our preprompt, resulting in multiple diffs being generated for the same file. This inconsistency led to key errors during the diff validation process, causing disruptions in the workflow.

Solution

To address this, we have implemented a more robust approach to handle consecutive diffs:

1. Enhanced Preprompt: We revised the preprompt to explicitly instruct the LLM to avoid generating multiple diffs for the same file. The updated preprompt now includes the following directive: "Ensure to provide all changes in a single diff chunk per file to avoid multiple diffs on the same file."

2. Improved Parsing Logic: We updated the parse_diffs function to discard any subsequent diffs for a file, keeping only the first occurrence. This ensures that only the initial changes are applied, allowing users to refine their codebase gradually.

3. Legacy Considerations: Given the legacy nature of the issue, where the LLM did not always follow the prompt precisely, this robust solution ensures that even if the LLM generates consecutive diffs, our system will handle them gracefully.

Benefits

• Reduced Errors: Users will no longer face key errors due to consecutive diffs.
• Improved Workflow: The diff validation process is now more reliable, enabling smoother code reviews and integrations.
• Gradual Refinement: Users can refine their codebase step-by-step without being overwhelmed by conflicting diffs.

Implementation Details

• Updated the preprompt to include stricter instructions for the LLM.
• Modified the parse_diffs function to discard subsequent diffs for the same file, retaining only the first diff.
• Added tests to verify the new behavior and ensure that the system correctly handles multiple diffs.