decktape/libs/supports-color.js

'use strict';
var argv = process.argv;

var terminator = argv.indexOf('--');
var hasFlag = function (flag) {
	flag = '--' + flag;
	var pos = argv.indexOf(flag);
	return pos !== -1 && (terminator !== -1 ? pos < terminator : true);
};

module.exports = (function () {
	if ('FORCE_COLOR' in process.env) {
		return true;
	}

	if (hasFlag('no-color') ||
		hasFlag('no-colors') ||
		hasFlag('color=false')) {
		return false;
	}

	if (hasFlag('color') ||
		hasFlag('colors') ||
		hasFlag('color=true') ||
		hasFlag('color=always')) {
		return true;
	}

	if (process.stdout && !process.stdout.isTTY) {
		return false;
	}

	if (process.platform === 'win32') {
		return true;
	}

	if ('COLORTERM' in process.env) {
		return true;
	}

	if (process.env.TERM === 'dumb') {
		return false;
	}

	if (/^screen|^xterm|^vt100|color|ansi|cygwin|linux/i.test(process.env.TERM)) {
		return true;
	}

	return false;
})();