/**
* @fileoverview Defines the core logic, schemas, and types for the git_reset tool.
* @module src/mcp-server/tools/gitReset/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";
import { getGitStatus, GitStatusOutputSchema } from "../gitStatus/logic.js";
const execFileAsync = promisify(execFile);
// 1. DEFINE the Zod input schema.
export const GitResetInputSchema = z.object({
path: z.string().default(".").describe("Path to the Git repository."),
mode: z
.enum(["soft", "mixed", "hard", "merge", "keep"])
.default("mixed")
.describe("Reset mode."),
commit: z
.string()
.optional()
.describe("Commit, branch, or ref to reset to. Defaults to HEAD."),
});
// 2. DEFINE the Zod response schema.
export const GitResetOutputSchema = z.object({
success: z.boolean().describe("Indicates if the command was successful."),
message: z.string().describe("A summary message of the result."),
changesSummary: z.string().optional().describe("Summary of changes, if any."),
status: GitStatusOutputSchema.optional().describe(
"The status of the repository after the reset operation.",
),
});
// 3. INFER and export TypeScript types.
export type GitResetInput = z.infer<typeof GitResetInputSchema>;
export type GitResetOutput = z.infer<typeof GitResetOutputSchema>;
/**
* 4. IMPLEMENT the core logic function.
* @throws {McpError} If the logic encounters an unrecoverable issue.
*/
export async function resetGitState(
params: GitResetInput,
context: RequestContext & { getWorkingDirectory: () => string | undefined },
): Promise<GitResetOutput> {
const operation = "resetGitState";
logger.debug(`Executing ${operation}`, { ...context, params });
const workingDir = context.getWorkingDirectory();
if (params.path === "." && !workingDir) {
throw new McpError(
BaseErrorCode.VALIDATION_ERROR,
"No session working directory set. Please specify a 'path' or use 'git_set_working_dir' first.",
);
}
const targetPath = sanitization.sanitizePath(
params.path === "." ? workingDir! : params.path,
{ allowAbsolute: true },
).sanitizedPath;
const args = ["-C", targetPath, "reset"];
args.push(`--${params.mode}`);
if (params.commit) args.push(params.commit);
logger.debug(`Executing command: git ${args.join(" ")}`, {
...context,
operation,
});
const { stdout, stderr } = await execFileAsync("git", args);
const message =
stderr.trim() ||
stdout.trim() ||
`Reset successful (mode: ${params.mode}).`;
const changesSummary = stderr.includes("Unstaged changes after reset")
? stderr
: undefined;
const status = await getGitStatus({ path: targetPath }, context);
return { success: true, message, changesSummary, status };
}
