everything-dev/dist/dev-logs.mjs

A consolidated product package for building Module Federation apps with oRPC APIs.

import { existsSync } from "node:fs";
import { join } from "node:path";
import { appendFile, mkdir, readFile, writeFile } from "node:fs/promises";

//#region src/dev-logs.ts
const ESC = "\x1B";
const BEL = "\x07";
const ANSI_RE = new RegExp(`${ESC}\\[[0-?]*[ -/]*[@-~]|${ESC}\\][^${BEL}]*${BEL}`, "g");
const stripAnsi = (input) => input.replace(ANSI_RE, "");
function getBosDir(configDir) {
	return join(configDir, ".bos");
}
function getLogsDir(configDir) {
	return join(getBosDir(configDir), "logs");
}
function formatLogLine(entry) {
	const ts = new Date(entry.timestamp).toISOString();
	const prefix = entry.isError ? "ERR" : "OUT";
	const clean = stripAnsi(entry.line);
	return `[${ts}] [${entry.source}] [${prefix}] ${clean}`;
}
async function createDevLogger(configDir, description) {
	const dir = getLogsDir(configDir);
	if (!existsSync(dir)) await mkdir(dir, { recursive: true });
	const now = /* @__PURE__ */ new Date();
	const logFile = join(dir, `dev-${now.toISOString().replace(/[:.]/g, "-").slice(0, 19)}.log`);
	const latestFile = join(dir, "dev-latest.log");
	const header = `# everything-dev dev session: ${description}\n# Started: ${now.toISOString()}\n\n`;
	await writeFile(logFile, header, "utf8");
	await writeFile(latestFile, header, "utf8");
	let chain = Promise.resolve();
	const enqueue = (fn) => {
		chain = chain.then(fn, fn);
		return chain;
	};
	return {
		logFile,
		latestFile,
		write: (entry) => enqueue(async () => {
			const line = `${formatLogLine(entry)}\n`;
			await appendFile(logFile, line);
			await appendFile(latestFile, line);
		}),
		readLatest: async (opts) => {
			const text = await readFile(latestFile, "utf8").catch(() => "");
			const tail = opts?.tail;
			if (!tail || tail <= 0) return text;
			const lines = text.split("\n");
			return lines.slice(Math.max(0, lines.length - tail)).join("\n");
		}
	};
}

//#endregion
export { createDevLogger };
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