@nvhien20vn/git-mcp-server
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JavaScript
// Import utils from barrel (logger from ../utils/internal/logger.js)
import { logger } from '../../../utils/index.js';
// Import utils from barrel (ErrorHandler from ../utils/internal/errorHandler.js)
import { ErrorHandler } from '../../../utils/index.js';
// Import utils from barrel (requestContextService from ../utils/internal/requestContext.js)
import { BaseErrorCode } from '../../../types-global/errors.js'; // Keep direct import for types-global
import { requestContextService } from '../../../utils/index.js';
import { GitMergeInputSchema, gitMergeLogic } from './logic.js';
let _getWorkingDirectory;
let _getSessionId;
/**
* Initializes the state accessors needed by the gitMerge tool registration.
* @param getWdFn - Function to get the working directory for a session.
* @param getSidFn - Function to get the session ID from context.
*/
export function initializeGitMergeStateAccessors(getWdFn, getSidFn) {
_getWorkingDirectory = getWdFn;
_getSessionId = getSidFn;
logger.info('State accessors initialized for git_merge tool registration.');
}
const TOOL_NAME = 'git_merge';
const TOOL_DESCRIPTION = 'Merges the specified branch into the current branch. Supports options like --no-ff, --squash, and --abort. Returns the merge result as a JSON object.';
/**
* Registers the git_merge tool with the MCP server.
*
* @param {McpServer} server - The McpServer instance.
* @returns {Promise<void>}
* @throws {Error} If registration fails or state accessors are not initialized.
*/
export const registerGitMergeTool = async (server) => {
if (!_getWorkingDirectory || !_getSessionId) {
throw new Error('State accessors for git_merge must be initialized before registration.');
}
const operation = 'registerGitMergeTool';
const context = requestContextService.createRequestContext({ operation });
await ErrorHandler.tryCatch(async () => {
server.tool(TOOL_NAME, TOOL_DESCRIPTION, GitMergeInputSchema.shape, // Provide the Zod schema shape
async (validatedArgs, callContext) => {
const toolOperation = 'tool:git_merge';
const requestContext = requestContextService.createRequestContext({ operation: toolOperation, parentContext: callContext });
const sessionId = _getSessionId(requestContext);
const getWorkingDirectoryForSession = () => {
return _getWorkingDirectory(sessionId);
};
const logicContext = {
...requestContext,
sessionId: sessionId,
getWorkingDirectory: getWorkingDirectoryForSession,
};
logger.info(`Executing tool: ${TOOL_NAME}`, logicContext);
return await ErrorHandler.tryCatch(async () => {
// Call the core logic function
const mergeResult = await gitMergeLogic(validatedArgs, logicContext);
// Format the result as a JSON string within TextContent
const resultContent = {
type: 'text',
text: JSON.stringify(mergeResult, null, 2), // Pretty-print JSON
contentType: 'application/json',
};
// Log based on the success flag in the result
if (mergeResult.success) {
logger.info(`Tool ${TOOL_NAME} executed successfully, returning JSON`, logicContext);
}
else {
// Log non-fatal conditions (like conflicts) differently from execution errors
logger.info(`Tool ${TOOL_NAME} completed with specific condition (e.g., conflict, no merge to abort), returning JSON`, logicContext);
}
// Even if success is false (e.g., conflicts), it's not a tool execution *error* in the MCP sense,
// the tool ran, but the git operation failed predictably. Return the structured result.
return { content: [resultContent] };
}, {
operation: toolOperation,
context: logicContext,
input: validatedArgs,
errorCode: BaseErrorCode.INTERNAL_ERROR, // Default for unexpected logic errors
});
});
logger.info(`Tool registered: ${TOOL_NAME}`, context);
}, { operation, context, critical: true });
};