import { readFileSync, existsSync } from 'fs';
import { homedir } from 'os';
import { join } from 'path';
export interface ServerConfig {
host: string;
user: string;
keyPath: string;
port?: number;
}
export interface Config {
defaultServer: string;
servers: Record<string, ServerConfig>;
}
export function loadConfig(): Config {
const configPath = join(homedir(), '.faber-mcp.json');
if (!existsSync(configPath)) {
throw new Error(
`Config file not found at ${configPath}\n\n` +
'Please create ~/.faber-mcp.json with your server configuration.\n' +
'Example:\n' +
'{\n' +
' "defaultServer": "production",\n' +
' "servers": {\n' +
' "production": {\n' +
' "host": "your-server.com",\n' +
' "user": "root",\n' +
' "keyPath": "~/.ssh/id_rsa"\n' +
' }\n' +
' }\n' +
'}'
);
}
try {
const content = readFileSync(configPath, 'utf-8');
const config = JSON.parse(content) as Config;
// Validate config
if (!config.defaultServer || !config.servers) {
throw new Error('Config must have "defaultServer" and "servers" fields');
}
if (!config.servers[config.defaultServer]) {
throw new Error(`Default server "${config.defaultServer}" not found in servers configuration`);
}
return config;
} catch (error) {
if (error instanceof SyntaxError) {
throw new Error(`Invalid JSON in ${configPath}: ${error.message}`);
}
throw error;
}
}
export function getServerConfig(config: Config, serverName?: string): ServerConfig {
const name = serverName || config.defaultServer;
const server = config.servers[name];
if (!server) {
throw new Error(`Server "${name}" not found in configuration`);
}
return {
...server,
port: server.port || 22,
keyPath: server.keyPath.replace('~', homedir())
};
}
