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