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'use strict';
const util = require('util');
const fs = require('fs')
/**
* Boolean indicating if debug mode is enabled.
*
* @type {boolean}
*/
const IS_DEBUG = process.env.SPAWN_WRAP_DEBUG === '1'
/**
* If debug is enabled, write message to stderr.
*
* If debug is disabled, no message is written.
*/
function debug(...args) {
if (!IS_DEBUG) {
return;
}
const prefix = `SW ${process.pid}: `
const data = util.format(...args).trim()
const message = data.split('\n').map(line => `${prefix}${line}\n`).join('')
fs.writeSync(2, message)
}
module.exports = {
IS_DEBUG,
debug,
}