/**
* @fileoverview Defines the core logic, schemas, and types for the git_fetch tool.
* @module src/mcp-server/tools/gitFetch/logic
*/
import { execFile } from "child_process";
import { promisify } from "util";
import { z } from "zod";
import {
logger,
type RequestContext,
sanitization,
} from "../../../utils/index.js";
import { McpError, BaseErrorCode } from "../../../types-global/errors.js";
const execFileAsync = promisify(execFile);
// 1. DEFINE the Zod input schema.
export const GitFetchInputSchema = z.object({
path: z
.string()
.default(".")
.describe(
"Path to the Git repository. Defaults to the directory set via `git_set_working_dir` for the session; set 'git_set_working_dir' if not set.",
),
remote: z
.string()
.optional()
.describe("The remote repository to fetch from (e.g., 'origin')."),
prune: z
.boolean()
.default(false)
.describe(
"Remove remote-tracking references that no longer exist on the remote.",
),
tags: z.boolean().default(false).describe("Fetch all tags from the remote."),
all: z.boolean().default(false).describe("Fetch all remotes."),
});
// 2. DEFINE the Zod response schema.
export const GitFetchOutputSchema = z.object({
success: z.boolean().describe("Indicates if the command was successful."),
message: z.string().describe("A summary message of the result."),
});
// 3. INFER and export TypeScript types.
export type GitFetchInput = z.infer<typeof GitFetchInputSchema>;
export type GitFetchOutput = z.infer<typeof GitFetchOutputSchema>;
/**
* 4. IMPLEMENT the core logic function.
* @throws {McpError} If the logic encounters an unrecoverable issue.
*/
export async function fetchGitRemote(
params: GitFetchInput,
context: RequestContext & { getWorkingDirectory: () => string | undefined },
): Promise<GitFetchOutput> {
const operation = "fetchGitRemote";
logger.debug(`Executing ${operation}`, { ...context, params });
const workingDir = context.getWorkingDirectory();
if (params.path === "." && !workingDir) {
throw new McpError(
BaseErrorCode.VALIDATION_ERROR,
"No session working directory set. Please specify a 'path' or use 'git_set_working_dir' first.",
);
}
const targetPath = sanitization.sanitizePath(
params.path === "." ? workingDir! : params.path,
{ allowAbsolute: true },
).sanitizedPath;
const args = ["-C", targetPath, "fetch"];
if (params.prune) args.push("--prune");
if (params.tags) args.push("--tags");
if (params.all) {
args.push("--all");
} else if (params.remote) {
args.push(params.remote);
}
logger.debug(`Executing command: git ${args.join(" ")}`, {
...context,
operation,
});
const { stderr } = await execFileAsync("git", args);
const message = stderr.trim() || "Fetch successful.";
return { success: true, message };
}
