twitst4tz

node.js (4475B)

---

 /**
  * Module dependencies.
  */
 
 const tty = require('tty');
 const util = require('util');
 
 /**
  * This is the Node.js implementation of `debug()`.
  */
 
 exports.init = init;
 exports.log = log;
 exports.formatArgs = formatArgs;
 exports.save = save;
 exports.load = load;
 exports.useColors = useColors;
 
 /**
  * Colors.
  */
 
 exports.colors = [6, 2, 3, 4, 5, 1];
 
 try {
 	// Optional dependency (as in, doesn't need to be installed, NOT like optionalDependencies in package.json)
 	// eslint-disable-next-line import/no-extraneous-dependencies
 	const supportsColor = require('supports-color');
 
 	if (supportsColor && (supportsColor.stderr || supportsColor).level >= 2) {
 		exports.colors = [
 			20,
 			21,
 			26,
 			27,
 			32,
 			33,
 			38,
 			39,
 			40,
 			41,
 			42,
 			43,
 			44,
 			45,
 			56,
 			57,
 			62,
 			63,
 			68,
 			69,
 			74,
 			75,
 			76,
 			77,
 			78,
 			79,
 			80,
 			81,
 			92,
 			93,
 			98,
 			99,
 			112,
 			113,
 			128,
 			129,
 			134,
 			135,
 			148,
 			149,
 			160,
 			161,
 			162,
 			163,
 			164,
 			165,
 			166,
 			167,
 			168,
 			169,
 			170,
 			171,
 			172,
 			173,
 			178,
 			179,
 			184,
 			185,
 			196,
 			197,
 			198,
 			199,
 			200,
 			201,
 			202,
 			203,
 			204,
 			205,
 			206,
 			207,
 			208,
 			209,
 			214,
 			215,
 			220,
 			221
 		];
 	}
 } catch (error) {
 	// Swallow - we only care if `supports-color` is available; it doesn't have to be.
 }
 
 /**
  * Build up the default `inspectOpts` object from the environment variables.
  *
  *   $ DEBUG_COLORS=no DEBUG_DEPTH=10 DEBUG_SHOW_HIDDEN=enabled node script.js
  */
 
 exports.inspectOpts = Object.keys(process.env).filter(key => {
 	return /^debug_/i.test(key);
 }).reduce((obj, key) => {
 	// Camel-case
 	const prop = key
 		.substring(6)
 		.toLowerCase()
 		.replace(/_([a-z])/g, (_, k) => {
 			return k.toUpperCase();
 		});
 
 	// Coerce string value into JS value
 	let val = process.env[key];
 	if (/^(yes|on|true|enabled)$/i.test(val)) {
 		val = true;
 	} else if (/^(no|off|false|disabled)$/i.test(val)) {
 		val = false;
 	} else if (val === 'null') {
 		val = null;
 	} else {
 		val = Number(val);
 	}
 
 	obj[prop] = val;
 	return obj;
 }, {});
 
 /**
  * Is stdout a TTY? Colored output is enabled when `true`.
  */
 
 function useColors() {
 	return 'colors' in exports.inspectOpts ?
 		Boolean(exports.inspectOpts.colors) :
 		tty.isatty(process.stderr.fd);
 }
 
 /**
  * Adds ANSI color escape codes if enabled.
  *
  * @api public
  */
 
 function formatArgs(args) {
 	const {namespace: name, useColors} = this;
 
 	if (useColors) {
 		const c = this.color;
 		const colorCode = '\u001B[3' + (c < 8 ? c : '8;5;' + c);
 		const prefix = `  ${colorCode};1m${name} \u001B[0m`;
 
 		args[0] = prefix + args[0].split('\n').join('\n' + prefix);
 		args.push(colorCode + 'm+' + module.exports.humanize(this.diff) + '\u001B[0m');
 	} else {
 		args[0] = getDate() + name + ' ' + args[0];
 	}
 }
 
 function getDate() {
 	if (exports.inspectOpts.hideDate) {
 		return '';
 	}
 	return new Date().toISOString() + ' ';
 }
 
 /**
  * Invokes `util.format()` with the specified arguments and writes to stderr.
  */
 
 function log(...args) {
 	return process.stderr.write(util.format(...args) + '\n');
 }
 
 /**
  * Save `namespaces`.
  *
  * @param {String} namespaces
  * @api private
  */
 function save(namespaces) {
 	if (namespaces) {
 		process.env.DEBUG = namespaces;
 	} else {
 		// If you set a process.env field to null or undefined, it gets cast to the
 		// string 'null' or 'undefined'. Just delete instead.
 		delete process.env.DEBUG;
 	}
 }
 
 /**
  * Load `namespaces`.
  *
  * @return {String} returns the previously persisted debug modes
  * @api private
  */
 
 function load() {
 	return process.env.DEBUG;
 }
 
 /**
  * Init logic for `debug` instances.
  *
  * Create a new `inspectOpts` object in case `useColors` is set
  * differently for a particular `debug` instance.
  */
 
 function init(debug) {
 	debug.inspectOpts = {};
 
 	const keys = Object.keys(exports.inspectOpts);
 	for (let i = 0; i < keys.length; i++) {
 		debug.inspectOpts[keys[i]] = exports.inspectOpts[keys[i]];
 	}
 }
 
 module.exports = require('./common')(exports);
 
 const {formatters} = module.exports;
 
 /**
  * Map %o to `util.inspect()`, all on a single line.
  */
 
 formatters.o = function (v) {
 	this.inspectOpts.colors = this.useColors;
 	return util.inspect(v, this.inspectOpts)
 		.replace(/\s*\n\s*/g, ' ');
 };
 
 /**
  * Map %O to `util.inspect()`, allowing multiple lines if needed.
  */
 
 formatters.O = function (v) {
 	this.inspectOpts.colors = this.useColors;
 	return util.inspect(v, this.inspectOpts);
 };