/**
* Minimal .env loader — no dependencies.
*
* Loads environment variables from multiple locations (in priority order):
* 1. Actual env vars (always win — set at runtime or via MCP config)
* 2. Project-local .env (for development)
* 3. ~/.hydramcp/.env (persistent config saved by `npx hydramcp setup`)
*
* Only sets values that aren't already defined.
*/
import { readFileSync } from "node:fs";
import { resolve, dirname, join } from "node:path";
import { fileURLToPath } from "node:url";
import { homedir } from "node:os";
function parseEnvFile(path: string): void {
let content: string;
try {
content = readFileSync(path, "utf-8");
} catch {
return; // File doesn't exist — that's fine
}
for (const line of content.split("\n")) {
const trimmed = line.trim();
if (!trimmed || trimmed.startsWith("#")) continue;
const eqIndex = trimmed.indexOf("=");
if (eqIndex === -1) continue;
const key = trimmed.substring(0, eqIndex).trim();
const value = trimmed.substring(eqIndex + 1).trim();
// Don't override existing env vars
if (process.env[key] === undefined) {
process.env[key] = value;
}
}
}
export function loadEnv(): void {
// 1. Project-local .env (walk up from dist/ to project root)
const __dirname = dirname(fileURLToPath(import.meta.url));
parseEnvFile(resolve(__dirname, "..", "..", ".env"));
// 2. ~/.hydramcp/.env (persistent config from setup wizard)
parseEnvFile(join(homedir(), ".hydramcp", ".env"));
}
