/**
* Configuration module for GitInsight MCP Server
* Loads and validates environment variables
*/
import dotenv from 'dotenv';
import { ServerConfig } from './types/index.js';
// Load environment variables from .env file
dotenv.config();
/**
* Validates that required environment variables are present
* @throws Error if required variables are missing
*/
function validateConfig(): void {
const required = ['GITHUB_TOKEN', 'GITHUB_USERNAME'];
const missing = required.filter(key => !process.env[key]);
if (missing.length > 0) {
throw new Error(
`Missing required environment variables: ${missing.join(', ')}\n` +
'Please create a .env file based on .env.example'
);
}
}
/**
* Loads and returns the server configuration
* @returns ServerConfig object with all settings
*/
export function getConfig(): ServerConfig {
validateConfig();
return {
github_token: process.env.GITHUB_TOKEN!,
github_username: process.env.GITHUB_USERNAME!,
cache_ttl: parseInt(process.env.CACHE_TTL_SECONDS || '3600', 10),
cache_check_period: parseInt(process.env.CACHE_CHECK_PERIOD_SECONDS || '600', 10),
api_base_url: process.env.GITHUB_API_BASE_URL || 'https://api.github.com'
};
}
/**
* Export the configuration as a singleton
*/
export const config = getConfig();
