85 lines
2.6 KiB
TypeScript
85 lines
2.6 KiB
TypeScript
import fs from 'fs';
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import path from 'path';
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// ── Internal cache ──────────────────────────────────────────────
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let _cache: Record<string, string> | null = null;
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/** Parse the entire .env file into a Record (no key filtering). */
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function parseEnvFile(): Record<string, string> {
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const envFile = path.join(process.cwd(), '.env');
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let content: string;
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try {
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content = fs.readFileSync(envFile, 'utf-8');
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} catch {
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return {};
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}
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const result: Record<string, string> = {};
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for (const line of content.split('\n')) {
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const trimmed = line.trim();
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if (!trimmed || trimmed.startsWith('#')) continue;
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const eqIdx = trimmed.indexOf('=');
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if (eqIdx === -1) continue;
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const key = trimmed.slice(0, eqIdx).trim();
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let value = trimmed.slice(eqIdx + 1).trim();
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if (
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(value.startsWith('"') && value.endsWith('"')) ||
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(value.startsWith("'") && value.endsWith("'"))
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) {
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value = value.slice(1, -1);
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}
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result[key] = value;
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}
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return result;
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}
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// ── Public API ──────────────────────────────────────────────────
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/** Load (or reload) the .env file into the in-memory cache. */
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export function loadEnvFile(): void {
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_cache = parseEnvFile();
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}
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/**
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* Look up a single env value.
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* Priority: process.env > .env cache > undefined
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*/
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export function getEnv(key: string): string | undefined {
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if (!_cache) loadEnvFile();
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if (Object.prototype.hasOwnProperty.call(process.env, key)) {
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return process.env[key];
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}
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if (Object.prototype.hasOwnProperty.call(_cache!, key)) {
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return _cache![key];
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}
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return undefined;
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}
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/**
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* Parse the .env file and return values for the requested keys.
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* Does NOT load anything into process.env — callers decide what to
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* do with the values. This keeps secrets out of the process environment
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* so they don't leak to child processes.
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*
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* Now backed by the in-memory cache (disk read happens at most once).
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*/
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export function readEnvFile(keys: string[]): Record<string, string> {
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if (!_cache) loadEnvFile();
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const result: Record<string, string> = {};
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const wanted = new Set(keys);
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for (const [key, value] of Object.entries(_cache!)) {
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if (wanted.has(key)) result[key] = value;
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}
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return result;
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}
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export function listConfiguredEnvKeys(): string[] {
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if (!_cache) loadEnvFile();
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return Array.from(
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new Set([...Object.keys(_cache!), ...Object.keys(process.env)]),
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).sort();
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}
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