/**
* @fileoverview Handles registration and error handling for the git_fetch tool.
* @module src/mcp-server/tools/gitFetch/registration
*/
import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import {
ErrorHandler,
logger,
RequestContext,
requestContextService,
} from "../../../utils/index.js";
import { McpError } from "../../../types-global/errors.js";
import {
fetchGitRemote,
GitFetchInput,
GitFetchInputSchema,
GitFetchOutputSchema,
} from "./logic.js";
export type GetWorkingDirectoryFn = (
sessionId: string | undefined,
) => string | undefined;
export type GetSessionIdFn = (context: RequestContext) => string | undefined;
const TOOL_NAME = "git_fetch";
const TOOL_DESCRIPTION =
"Downloads objects and refs from one or more repositories. Can fetch specific remotes or all, prune stale branches, and fetch tags.";
/**
* Registers the git_fetch tool with the MCP server instance.
* @param server The MCP server instance.
* @param getWorkingDirectory Function to get the session's working directory.
* @param getSessionId Function to get the session ID from context.
*/
export const registerGitFetchTool = async (
server: McpServer,
getWorkingDirectory: GetWorkingDirectoryFn,
getSessionId: GetSessionIdFn,
): Promise<void> => {
const operation = "registerGitFetchTool";
const context = requestContextService.createRequestContext({ operation });
server.registerTool(
TOOL_NAME,
{
title: "Git Fetch",
description: TOOL_DESCRIPTION,
inputSchema: GitFetchInputSchema.shape,
outputSchema: GitFetchOutputSchema.shape,
annotations: {
readOnlyHint: false, // Modifies local refs
destructiveHint: false,
idempotentHint: false,
openWorldHint: true, // Interacts with remote repositories
},
},
async (params: GitFetchInput, callContext: Record<string, unknown>) => {
const handlerContext = requestContextService.createRequestContext({
toolName: TOOL_NAME,
parentContext: callContext,
});
try {
const sessionId = getSessionId(handlerContext);
const result = await fetchGitRemote(params, {
...handlerContext,
getWorkingDirectory: () => getWorkingDirectory(sessionId),
});
return {
structuredContent: result,
content: [
{
type: "text",
text: `Success: ${JSON.stringify(result, null, 2)}`,
},
],
};
} catch (error) {
logger.error(`Error in ${TOOL_NAME} handler`, {
error,
...handlerContext,
});
const mcpError = ErrorHandler.handleError(error, {
operation: `tool:${TOOL_NAME}`,
context: handlerContext,
input: params,
}) as McpError;
return {
isError: true,
content: [{ type: "text", text: `Error: ${mcpError.message}` }],
structuredContent: {
code: mcpError.code,
message: mcpError.message,
details: mcpError.details,
},
};
}
},
);
logger.info(`Tool '${TOOL_NAME}' registered successfully.`, context);
};
