@phren/cli/dist/logger.js

Knowledge layer for AI agents - CLI, MCP server, and data layer

import * as fs from "fs";
import { runtimeFile, findPhrenPath } from "./shared.js";
let _cachedPhrenPath;
const LOG_MAX_BYTES = 5_000_000; // rotate debug.log past ~5MB
const LOG_KEEP_LINES = 2000; // keep the most recent lines on rotation
/** Truncate debug.log to its last LOG_KEEP_LINES if it has grown past the cap. */
function rotateIfLarge(logPath) {
    try {
        if (fs.statSync(logPath).size <= LOG_MAX_BYTES)
            return;
        const lines = fs.readFileSync(logPath, "utf-8").split("\n");
        fs.writeFileSync(logPath, lines.slice(-LOG_KEEP_LINES).join("\n"));
    }
    catch {
        // statSync ENOENT (no file yet) or any IO error — nothing to rotate
    }
}
export function log(level, tool, message, extra) {
    try {
        // debug-level logging is opt-in (matches debugLog). It was the bulk of the
        // 30MB debug.log — mostly expected-ENOENT noise logged on the normal path.
        if (level === "debug" && !process.env.PHREN_DEBUG)
            return;
        if (_cachedPhrenPath === undefined)
            _cachedPhrenPath = findPhrenPath();
        if (!_cachedPhrenPath)
            return;
        const logPath = runtimeFile(_cachedPhrenPath, "debug.log");
        rotateIfLarge(logPath);
        const line = JSON.stringify({ ts: new Date().toISOString(), level, tool, message, ...extra });
        fs.appendFileSync(logPath, line + "\n");
    }
    catch {
        // Logging must never throw
    }
}
export const logger = {
    debug: (tool, message, extra) => log("debug", tool, message, extra),
    info: (tool, message, extra) => log("info", tool, message, extra),
    warn: (tool, message, extra) => log("warn", tool, message, extra),
    error: (tool, message, extra) => log("error", tool, message, extra),
};