pino.js

// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// This file is part of Parity.
//
// SPDX-License-Identifier: BSD-3-Clause

import { app } from 'electron';
import fs from 'fs';
import { multistream } from 'pino-multi-stream';
import Pino from 'pino';

import { name } from '../../../package.json';

// Pino by default outputs JSON. We prettify that.
const pretty = Pino.pretty();
pretty.pipe(process.stdout);

// Create userData folder if it doesn't exist
try {
  fs.statSync(app.getPath('userData'));
} catch (e) {
  fs.mkdirSync(app.getPath('userData'));
}

// Create 2 output streams:
// - fether.log file (raw JSON)
// - stdout (prettified output)
const streams = [
  {
    level: 'info',
    stream: fs.createWriteStream(`${app.getPath('userData')}/${name}.log`)
  },
  { level: 'info', stream: pretty }
];

export default opts => Pino({ name, ...opts }, multistream(streams));