delete_branch

Instructions

Args:
    project_id: GitLab project ID
    branch_name: Branch name to delete
    token: GitLab Personal Access Token (optional)
    ctx: MCP context (automatically injected)

Implementation Reference

• gitlab_clone_mcp_server/server.py:419-436 (handler)

  The 'delete_branch' tool handler function. It is registered as an MCP tool via @mcp.tool() decorator, accepts project_id and branch_name parameters, URL-encodes the branch name, and sends a DELETE request to the GitLab API endpoint /projects/{project_id}/repository/branches/{encoded_branch}. Returns a success message or error.

  @mcp.tool()
  async def delete_branch(project_id: int, branch_name: str, token: str = None, ctx=None) -> str:
      """Delete a branch.
      
      Args:
          project_id: GitLab project ID
          branch_name: Branch name to delete
          token: GitLab Personal Access Token (optional)
          ctx: MCP context (automatically injected)
      """
      import urllib.parse
      encoded_branch = urllib.parse.quote(branch_name, safe='')
      result = await make_gitlab_request(f"/projects/{project_id}/repository/branches/{encoded_branch}", "DELETE", ctx=ctx, token=token)
      
      if isinstance(result, dict) and "error" in result:
          return f"Error deleting branch: {result['error']}"
      
      return f"Branch '{branch_name}' deleted successfully"

• gitlab_clone_mcp_server/server.py:419-419 (registration)

  The tool is registered using the @mcp.tool() decorator on the delete_branch function. The FastMCP instance 'mcp' is created at line 9.

  @mcp.tool()

• gitlab_clone_mcp_server/server.py:11-52 (helper)

  The make_gitlab_request helper function used by delete_branch to execute HTTP requests to the GitLab API. delete_branch calls it with method='DELETE'.

  async def make_gitlab_request(endpoint: str, method: str = "GET", data: dict = None, ctx=None, token: str = None) -> dict[str, Any] | None:
      """Make a request to GitLab API with proper error handling."""
      # Priority: 1. Explicit token parameter, 2. Context headers, 3. Environment variable
      
      # If no explicit token provided, try to get from context
      if not token and ctx and hasattr(ctx, 'request_context') and ctx.request_context:
          # Try to get from request headers
          if hasattr(ctx.request_context, 'headers'):
              token = ctx.request_context.headers.get('GITLAB_TOKEN')
      
      # Fallback to environment variable
      if not token:
          token = os.getenv("GITLAB_TOKEN")
      
      if not token:
          return {"error": "GitLab token not provided. Please provide a token parameter, GITLAB_TOKEN in the request headers, or set the environment variable."}
      
      # Get GitLab URL (from context or environment)
      gitlab_url = os.getenv("GITLAB_URL", "https://gitlab.com")
      
      headers = {
          "PRIVATE-TOKEN": token,
          "Content-Type": "application/json"
      }
      
      url = f"{gitlab_url}/api/v4{endpoint}"
      
      async with httpx.AsyncClient() as client:
          try:
              if method == "GET":
                  response = await client.get(url, headers=headers, timeout=30.0)
              elif method == "POST":
                  response = await client.post(url, headers=headers, json=data, timeout=30.0)
              elif method == "PUT":
                  response = await client.put(url, headers=headers, json=data, timeout=30.0)
              elif method == "DELETE":
                  response = await client.delete(url, headers=headers, timeout=30.0)
              
              response.raise_for_status()
              return response.json() if response.content else {"success": True}
          except Exception as e:
              return {"error": str(e)}