--- /dev/null
+'use strict';
+var hasFlag = require('has-flag');
+
+var support = function (level) {
+ if (level === 0) {
+ return false;
+ }
+
+ return {
+ level: level,
+ hasBasic: true,
+ has256: level >= 2,
+ has16m: level >= 3
+ };
+};
+
+var supportLevel = (function () {
+ if (hasFlag('no-color') ||
+ hasFlag('no-colors') ||
+ hasFlag('color=false')) {
+ return 0;
+ }
+
+ if (hasFlag('color=16m') ||
+ hasFlag('color=full') ||
+ hasFlag('color=truecolor')) {
+ return 3;
+ }
+
+ if (hasFlag('color=256')) {
+ return 2;
+ }
+
+ if (hasFlag('color') ||
+ hasFlag('colors') ||
+ hasFlag('color=true') ||
+ hasFlag('color=always')) {
+ return 1;
+ }
+
+ if (process.stdout && !process.stdout.isTTY) {
+ return 0;
+ }
+
+ if (process.platform === 'win32') {
+ return 1;
+ }
+
+ if ('CI' in process.env) {
+ if ('TRAVIS' in process.env || process.env.CI === 'Travis') {
+ return 1;
+ }
+
+ return 0;
+ }
+
+ if ('TEAMCITY_VERSION' in process.env) {
+ return process.env.TEAMCITY_VERSION.match(/^(9\.(0*[1-9]\d*)\.|\d{2,}\.)/) === null ? 0 : 1;
+ }
+
+ if (/^(screen|xterm)-256(?:color)?/.test(process.env.TERM)) {
+ return 2;
+ }
+
+ if (/^screen|^xterm|^vt100|color|ansi|cygwin|linux/i.test(process.env.TERM)) {
+ return 1;
+ }
+
+ if ('COLORTERM' in process.env) {
+ return 1;
+ }
+
+ if (process.env.TERM === 'dumb') {
+ return 0;
+ }
+
+ return 0;
+})();
+
+if (supportLevel === 0 && 'FORCE_COLOR' in process.env) {
+ supportLevel = 1;
+}
+
+module.exports = process && support(supportLevel);