get_pr_diff
Fetch the raw patch/diff text for a specific GitHub pull request to analyze code changes and review modifications.
Instructions
Fetches the diff/patch of a specific pull request from a GitHub repository. Args: repo_owner (str): The owner of the GitHub repository. repo_name (str): The name of the GitHub repository. pr_number (int): The pull request number. Returns: str: The raw patch/diff text of the pull request if successful, otherwise None. Error Handling: Logs an error message and prints the traceback if the request fails or an exception occurs.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| repo_owner | Yes | ||
| repo_name | Yes | ||
| pr_number | Yes |
Output Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| result | Yes |
Implementation Reference
- The handler function that executes the core logic of fetching the raw patch/diff for a specific GitHub pull request using the dedicated GitHub patch-diff API endpoint.
def get_pr_diff(self, repo_owner: str, repo_name: str, pr_number: int) -> str: """ Fetches the diff/patch of a specific pull request from a GitHub repository. Args: repo_owner (str): The owner of the GitHub repository. repo_name (str): The name of the GitHub repository. pr_number (int): The pull request number. Returns: str: The raw patch/diff text of the pull request if successful, otherwise None. Error Handling: Logs an error message and prints the traceback if the request fails or an exception occurs. """ logging.info(f"Fetching PR diff for {repo_owner}/{repo_name}#{pr_number}") try: # Fetch PR details response = requests.get(f"https://patch-diff.githubusercontent.com/raw/{repo_owner}/{repo_name}/pull/{pr_number}.patch", headers=self._get_headers(), timeout=TIMEOUT) response.raise_for_status() pr_patch = response.text logging.info("Successfully fetched PR diff/patch") return pr_patch except Exception as e: logging.error(f"Error fetching PR diff: {str(e)}") traceback.print_exc() return str(e) - src/mcp_github/issues_pr_analyser.py:109-113 (registration)Dynamic registration of all public methods (including get_pr_diff) from GitHubIntegration instance as MCP tools via FastMCP.add_tool()
def register_tools(self, methods: Any = None) -> None: for name, method in inspect.getmembers(methods): if (inspect.isfunction(method) or inspect.ismethod(method)) and not name.startswith("_"): self.mcp.add_tool(method) - src/mcp_github/issues_pr_analyser.py:105-107 (registration)Calls the register_tools method on the GitHubIntegration instance (self.gi) to register get_pr_diff and other methods as MCP tools.
def _register_tools(self): self.register_tools(self.gi) self.register_tools(self.ip) - Helper method used by get_pr_diff to generate authenticated HTTP headers for GitHub API requests.
def _get_headers(self): """ Constructs the HTTP headers required for GitHub API requests, including the authorization token. Returns: dict: A dictionary containing the required HTTP headers. Error Handling: Raises ValueError if the GitHub token is not set. """ if not self.github_token: raise ValueError("GitHub token is missing for API requests") headers = { 'Authorization': f'token {self.github_token}', 'Accept': 'application/vnd.github.v3+json' } return headers