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'use strict';

const escapeStringRegexp = require('escape-string-regexp');

const ansiStyles = require('ansi-styles');

const stdoutColor = require('supports-color').stdout;

const template = require('./templates.js');

const isSimpleWindowsTerm = process.platform === 'win32' && !(process.env.TERM || '').toLowerCase().startsWith('xterm');

// `supportsColor.level` → `ansiStyles.color[name]` mapping

const levelMapping = ['ansi', 'ansi', 'ansi256', 'ansi16m'];

// `color-convert` models to exclude from the Chalk API due to conflicts and such

const skipModels = new Set(['gray']);

const styles = Object.create(null);

function applyOptions(obj, options) {

options = options || {};

// Detect level if not set manually

const scLevel = stdoutColor ? stdoutColor.level : 0;

obj.level = options.level === undefined ? scLevel : options.level;

obj.enabled = 'enabled' in options ? options.enabled : obj.level > 0;

}

function Chalk(options) {

// We check for this.template here since calling `chalk.constructor()`

// by itself will have a `this` of a previously constructed chalk object

if (!this || !(this instanceof Chalk) || this.template) {

const chalk = {};

applyOptions(chalk, options);

chalk.template = function () {

const args = [].slice.call(arguments);

return chalkTag.apply(null, [chalk.template].concat(args));

};

Object.setPrototypeOf(chalk, Chalk.prototype);

Object.setPrototypeOf(chalk.template, chalk);

chalk.template.constructor = Chalk;

return chalk.template;

}

applyOptions(this, options);

}

// Use bright blue on Windows as the normal blue color is illegible

if (isSimpleWindowsTerm) {

ansiStyles.blue.open = '\u001B[94m';

}

for (const key of Object.keys(ansiStyles)) {

ansiStyles[key].closeRe = new RegExp(escapeStringRegexp(ansiStyles[key].close), 'g');

styles[key] = {

get() {

const codes = ansiStyles[key];

return build.call(this, this._styles ? this._styles.concat(codes) : [codes], this._empty, key);

}

};

}

styles.visible = {

get() {

return build.call(this, this._styles || [], true, 'visible');

}

};

ansiStyles.color.closeRe = new RegExp(escapeStringRegexp(ansiStyles.color.close), 'g');

for (const model of Object.keys(ansiStyles.color.ansi)) {

if (skipModels.has(model)) {

continue;

}

styles[model] = {

get() {

const level = this.level;

return function () {

const open = ansiStyles.color[levelMapping[level]][model].apply(null, arguments);

const codes = {

open,

close: ansiStyles.color.close,

closeRe: ansiStyles.color.closeRe

};

return build.call(this, this._styles ? this._styles.concat(codes) : [codes], this._empty, model);

};

}

};

}

ansiStyles.bgColor.closeRe = new RegExp(escapeStringRegexp(ansiStyles.bgColor.close), 'g');

for (const model of Object.keys(ansiStyles.bgColor.ansi)) {

if (skipModels.has(model)) {

continue;

}

const bgModel = 'bg' + model[0].toUpperCase() + model.slice(1);

styles[bgModel] = {

get() {

const level = this.level;

return function () {

const open = ansiStyles.bgColor[levelMapping[level]][model].apply(null, arguments);

const codes = {

open,

close: ansiStyles.bgColor.close,

closeRe: ansiStyles.bgColor.closeRe

};

return build.call(this, this._styles ? this._styles.concat(codes) : [codes], this._empty, model);

};

}

};

}

const proto = Object.defineProperties(() => {}, styles);

function build(_styles, _empty, key) {

const builder = function () {

return applyStyle.apply(builder, arguments);

};

builder._styles = _styles;

builder._empty = _empty;

const self = this;

Object.defineProperty(builder, 'level', {

enumerable: true,

get() {

return self.level;

},

set(level) {

self.level = level;

}

});

Object.defineProperty(builder, 'enabled', {

enumerable: true,

get() {

return self.enabled;

},

set(enabled) {

self.enabled = enabled;

}

});

// See below for fix regarding invisible grey/dim combination on Windows

builder.hasGrey = this.hasGrey || key === 'gray' || key === 'grey';

// `__proto__` is used because we must return a function, but there is

// no way to create a function with a different prototype

builder.__proto__ = proto; // eslint-disable-line no-proto

return builder;

}

function applyStyle() {

// Support varags, but simply cast to string in case there's only one arg

const args = arguments;

const argsLen = args.length;

let str = String(arguments[0]);

if (argsLen === 0) {

return '';

}

if (argsLen > 1) {

// Don't slice `arguments`, it prevents V8 optimizations

for (let a = 1; a < argsLen; a++) {

str += ' ' + args[a];

}

}

if (!this.enabled || this.level <= 0 || !str) {

return this._empty ? '' : str;

}

// Turns out that on Windows dimmed gray text becomes invisible in cmd.exe,

// see https://github.com/chalk/chalk/issues/58

// If we're on Windows and we're dealing with a gray color, temporarily make 'dim' a noop.

const originalDim = ansiStyles.dim.open;

if (isSimpleWindowsTerm && this.hasGrey) {

ansiStyles.dim.open = '';

}

for (const code of this._styles.slice().reverse()) {

// Replace any instances already present with a re-opening code

// otherwise only the part of the string until said closing code

// will be colored, and the rest will simply be 'plain'.

str = code.open + str.replace(code.closeRe, code.open) + code.close;

// Close the styling before a linebreak and reopen

// after next line to fix a bleed issue on macOS

// https://github.com/chalk/chalk/pull/92

str = str.replace(/\r?\n/g, `${code.close}$&${code.open}`);

}

// Reset the original `dim` if we changed it to work around the Windows dimmed gray issue

ansiStyles.dim.open = originalDim;

return str;

}

function chalkTag(chalk, strings) {

if (!Array.isArray(strings)) {

// If chalk() was called by itself or with a string,

// return the string itself as a string.

return [].slice.call(arguments, 1).join(' ');

}

const args = [].slice.call(arguments, 2);

const parts = [strings.raw[0]];

for (let i = 1; i < strings.length; i++) {

parts.push(String(args[i - 1]).replace(/[{}\\]/g, '\\$&'));

parts.push(String(strings.raw[i]));

}

return template(chalk, parts.join(''));

}

Object.defineProperties(Chalk.prototype, styles);

module.exports = Chalk(); // eslint-disable-line new-cap

module.exports.supportsColor = stdoutColor;

module.exports.default = module.exports; // For TypeScript