node_modules/chalk/readme.md - nifi-fds - Git at Google

 <h1 align="center">
 	<br>
 	<br>
 	<img width="320" src="media/logo.svg" alt="Chalk">
 	<br>
 	<br>
 	<br>
 </h1>

 > Terminal string styling done right

 [![Build Status](https://travis-ci.org/chalk/chalk.svg?branch=master)](https://travis-ci.org/chalk/chalk) [![Coverage Status](https://coveralls.io/repos/github/chalk/chalk/badge.svg?branch=master)](https://coveralls.io/github/chalk/chalk?branch=master) [![](https://img.shields.io/badge/unicorn-approved-ff69b4.svg)](https://www.youtube.com/watch?v=9auOCbH5Ns4) [![XO code style](https://img.shields.io/badge/code_style-XO-5ed9c7.svg)](https://github.com/xojs/xo) [![Mentioned in Awesome Node.js](https://awesome.re/mentioned-badge.svg)](https://github.com/sindresorhus/awesome-nodejs)

 ### [See what's new in Chalk 2](https://github.com/chalk/chalk/releases/tag/v2.0.0)

 <img src="https://cdn.rawgit.com/chalk/ansi-styles/8261697c95bf34b6c7767e2cbe9941a851d59385/screenshot.svg" alt="" width="900">


 ## Highlights

 - Expressive API
 - Highly performant
 - Ability to nest styles
 - [256/Truecolor color support](#256-and-truecolor-color-support)
 - Auto-detects color support
 - Doesn't extend `String.prototype`
 - Clean and focused
 - Actively maintained
 - [Used by ~23,000 packages](https://www.npmjs.com/browse/depended/chalk) as of December 31, 2017


 ## Install

 ```console
 $ npm install chalk
 ```

 <a href="https://www.patreon.com/sindresorhus">
 	<img src="https://c5.patreon.com/external/logo/become_a_patron_button@2x.png" width="160">
 </a>


 ## Usage

 ```js
 const chalk = require('chalk');

 console.log(chalk.blue('Hello world!'));
 ```

 Chalk comes with an easy to use composable API where you just chain and nest the styles you want.

 ```js
 const chalk = require('chalk');
 const log = console.log;

 // Combine styled and normal strings
 log(chalk.blue('Hello') + ' World' + chalk.red('!'));

 // Compose multiple styles using the chainable API
 log(chalk.blue.bgRed.bold('Hello world!'));

 // Pass in multiple arguments
 log(chalk.blue('Hello', 'World!', 'Foo', 'bar', 'biz', 'baz'));

 // Nest styles
 log(chalk.red('Hello', chalk.underline.bgBlue('world') + '!'));

 // Nest styles of the same type even (color, underline, background)
 log(chalk.green(
 	'I am a green line ' +
 	chalk.blue.underline.bold('with a blue substring') +
 	' that becomes green again!'
 ));

 // ES2015 template literal
 log(`
 CPU: ${chalk.red('90%')}
 RAM: ${chalk.green('40%')}
 DISK: ${chalk.yellow('70%')}
 `);

 // ES2015 tagged template literal
 log(chalk`
 CPU: {red ${cpu.totalPercent}%}
 RAM: {green ${ram.used / ram.total * 100}%}
 DISK: {rgb(255,131,0) ${disk.used / disk.total * 100}%}
 `);

 // Use RGB colors in terminal emulators that support it.
 log(chalk.keyword('orange')('Yay for orange colored text!'));
 log(chalk.rgb(123, 45, 67).underline('Underlined reddish color'));
 log(chalk.hex('#DEADED').bold('Bold gray!'));
 ```

 Easily define your own themes:

 ```js
 const chalk = require('chalk');

 const error = chalk.bold.red;
 const warning = chalk.keyword('orange');

 console.log(error('Error!'));
 console.log(warning('Warning!'));
 ```

 Take advantage of console.log [string substitution](https://nodejs.org/docs/latest/api/console.html#console_console_log_data_args):

 ```js
 const name = 'Sindre';
 console.log(chalk.green('Hello %s'), name);
 //=> 'Hello Sindre'
 ```


 ## API

 ### chalk.`<style>[.<style>...](string, [string...])`

 Example: `chalk.red.bold.underline('Hello', 'world');`

 Chain [styles](#styles) and call the last one as a method with a string argument. Order doesn't matter, and later styles take precedent in case of a conflict. This simply means that `chalk.red.yellow.green` is equivalent to `chalk.green`.

 Multiple arguments will be separated by space.

 ### chalk.enabled

 Color support is automatically detected, as is the level (see `chalk.level`). However, if you'd like to simply enable/disable Chalk, you can do so via the `.enabled` property.

 Chalk is enabled by default unless explicitly disabled via the constructor or `chalk.level` is `0`.

 If you need to change this in a reusable module, create a new instance:

 ```js
 const ctx = new chalk.constructor({enabled: false});
 ```

 ### chalk.level

 Color support is automatically detected, but you can override it by setting the `level` property. You should however only do this in your own code as it applies globally to all Chalk consumers.

 If you need to change this in a reusable module, create a new instance:

 ```js
 const ctx = new chalk.constructor({level: 0});
 ```

 Levels are as follows:

 0. All colors disabled
 1. Basic color support (16 colors)
 2. 256 color support
 3. Truecolor support (16 million colors)

 ### chalk.supportsColor

 Detect whether the terminal [supports color](https://github.com/chalk/supports-color). Used internally and handled for you, but exposed for convenience.

 Can be overridden by the user with the flags `--color` and `--no-color`. For situations where using `--color` is not possible, add the environment variable `FORCE_COLOR=1` to forcefully enable color or `FORCE_COLOR=0` to forcefully disable. The use of `FORCE_COLOR` overrides all other color support checks.

 Explicit 256/Truecolor mode can be enabled using the `--color=256` and `--color=16m` flags, respectively.


 ## Styles

 ### Modifiers

 - `reset`
 - `bold`
 - `dim`
 - `italic` *(Not widely supported)*
 - `underline`
 - `inverse`
 - `hidden`
 - `strikethrough` *(Not widely supported)*
 - `visible` (Text is emitted only if enabled)

 ### Colors

 - `black`
 - `red`
 - `green`
 - `yellow`
 - `blue` *(On Windows the bright version is used since normal blue is illegible)*
 - `magenta`
 - `cyan`
 - `white`
 - `gray` ("bright black")
 - `redBright`
 - `greenBright`
 - `yellowBright`
 - `blueBright`
 - `magentaBright`
 - `cyanBright`
 - `whiteBright`

 ### Background colors

 - `bgBlack`
 - `bgRed`
 - `bgGreen`
 - `bgYellow`
 - `bgBlue`
 - `bgMagenta`
 - `bgCyan`
 - `bgWhite`
 - `bgBlackBright`
 - `bgRedBright`
 - `bgGreenBright`
 - `bgYellowBright`
 - `bgBlueBright`
 - `bgMagentaBright`
 - `bgCyanBright`
 - `bgWhiteBright`


 ## Tagged template literal

 Chalk can be used as a [tagged template literal](http://exploringjs.com/es6/ch_template-literals.html#_tagged-template-literals).

 ```js
 const chalk = require('chalk');

 const miles = 18;
 const calculateFeet = miles => miles * 5280;

 console.log(chalk`
   There are {bold 5280 feet} in a mile.
   In {bold ${miles} miles}, there are {green.bold ${calculateFeet(miles)} feet}.
 `);
 ```

 Blocks are delimited by an opening curly brace (`{`), a style, some content, and a closing curly brace (`}`).

 Template styles are chained exactly like normal Chalk styles. The following two statements are equivalent:

 ```js
 console.log(chalk.bold.rgb(10, 100, 200)('Hello!'));
 console.log(chalk`{bold.rgb(10,100,200) Hello!}`);
 ```

 Note that function styles (`rgb()`, `hsl()`, `keyword()`, etc.) may not contain spaces between parameters.

 All interpolated values (`` chalk`${foo}` ``) are converted to strings via the `.toString()` method. All curly braces (`{` and `}`) in interpolated value strings are escaped.


 ## 256 and Truecolor color support

 Chalk supports 256 colors and [Truecolor](https://gist.github.com/XVilka/8346728) (16 million colors) on supported terminal apps.

 Colors are downsampled from 16 million RGB values to an ANSI color format that is supported by the terminal emulator (or by specifying `{level: n}` as a Chalk option). For example, Chalk configured to run at level 1 (basic color support) will downsample an RGB value of #FF0000 (red) to 31 (ANSI escape for red).

 Examples:

 - `chalk.hex('#DEADED').underline('Hello, world!')`
 - `chalk.keyword('orange')('Some orange text')`
 - `chalk.rgb(15, 100, 204).inverse('Hello!')`

 Background versions of these models are prefixed with `bg` and the first level of the module capitalized (e.g. `keyword` for foreground colors and `bgKeyword` for background colors).

 - `chalk.bgHex('#DEADED').underline('Hello, world!')`
 - `chalk.bgKeyword('orange')('Some orange text')`
 - `chalk.bgRgb(15, 100, 204).inverse('Hello!')`

 The following color models can be used:

 - [`rgb`](https://en.wikipedia.org/wiki/RGB_color_model) - Example: `chalk.rgb(255, 136, 0).bold('Orange!')`
 - [`hex`](https://en.wikipedia.org/wiki/Web_colors#Hex_triplet) - Example: `chalk.hex('#FF8800').bold('Orange!')`
 - [`keyword`](https://www.w3.org/wiki/CSS/Properties/color/keywords) (CSS keywords) - Example: `chalk.keyword('orange').bold('Orange!')`
 - [`hsl`](https://en.wikipedia.org/wiki/HSL_and_HSV) - Example: `chalk.hsl(32, 100, 50).bold('Orange!')`
 - [`hsv`](https://en.wikipedia.org/wiki/HSL_and_HSV) - Example: `chalk.hsv(32, 100, 100).bold('Orange!')`
 - [`hwb`](https://en.wikipedia.org/wiki/HWB_color_model)  - Example: `chalk.hwb(32, 0, 50).bold('Orange!')`
 - `ansi16`
 - `ansi256`


 ## Windows

 If you're on Windows, do yourself a favor and use [`cmder`](http://cmder.net/) instead of `cmd.exe`.


 ## Origin story

 [colors.js](https://github.com/Marak/colors.js) used to be the most popular string styling module, but it has serious deficiencies like extending `String.prototype` which causes all kinds of [problems](https://github.com/yeoman/yo/issues/68) and the package is unmaintained. Although there are other packages, they either do too much or not enough. Chalk is a clean and focused alternative.


 ## Related

 - [chalk-cli](https://github.com/chalk/chalk-cli) - CLI for this module
 - [ansi-styles](https://github.com/chalk/ansi-styles) - ANSI escape codes for styling strings in the terminal
 - [supports-color](https://github.com/chalk/supports-color) - Detect whether a terminal supports color
 - [strip-ansi](https://github.com/chalk/strip-ansi) - Strip ANSI escape codes
 - [strip-ansi-stream](https://github.com/chalk/strip-ansi-stream) - Strip ANSI escape codes from a stream
 - [has-ansi](https://github.com/chalk/has-ansi) - Check if a string has ANSI escape codes
 - [ansi-regex](https://github.com/chalk/ansi-regex) - Regular expression for matching ANSI escape codes
 - [wrap-ansi](https://github.com/chalk/wrap-ansi) - Wordwrap a string with ANSI escape codes
 - [slice-ansi](https://github.com/chalk/slice-ansi) - Slice a string with ANSI escape codes
 - [color-convert](https://github.com/qix-/color-convert) - Converts colors between different models
 - [chalk-animation](https://github.com/bokub/chalk-animation) - Animate strings in the terminal
 - [gradient-string](https://github.com/bokub/gradient-string) - Apply color gradients to strings
 - [chalk-pipe](https://github.com/LitoMore/chalk-pipe) - Create chalk style schemes with simpler style strings
 - [terminal-link](https://github.com/sindresorhus/terminal-link) - Create clickable links in the terminal


 ## Maintainers

 - [Sindre Sorhus](https://github.com/sindresorhus)
 - [Josh Junon](https://github.com/qix-)


 ## License

 MIT
	<h1 align="center">
	<br>
	<br>
	<img width="320" src="media/logo.svg" alt="Chalk">
	<br>
	<br>
	<br>
	</h1>

	> Terminal string styling done right

	[![Build Status](https://travis-ci.org/chalk/chalk.svg?branch=master)](https://travis-ci.org/chalk/chalk) [![Coverage Status](https://coveralls.io/repos/github/chalk/chalk/badge.svg?branch=master)](https://coveralls.io/github/chalk/chalk?branch=master) [![](https://img.shields.io/badge/unicorn-approved-ff69b4.svg)](https://www.youtube.com/watch?v=9auOCbH5Ns4) [![XO code style](https://img.shields.io/badge/code_style-XO-5ed9c7.svg)](https://github.com/xojs/xo) [![Mentioned in Awesome Node.js](https://awesome.re/mentioned-badge.svg)](https://github.com/sindresorhus/awesome-nodejs)

	### [See what's new in Chalk 2](https://github.com/chalk/chalk/releases/tag/v2.0.0)

	<img src="https://cdn.rawgit.com/chalk/ansi-styles/8261697c95bf34b6c7767e2cbe9941a851d59385/screenshot.svg" alt="" width="900">


	## Highlights

	- Expressive API
	- Highly performant
	- Ability to nest styles
	- [256/Truecolor color support](#256-and-truecolor-color-support)
	- Auto-detects color support
	- Doesn't extend `String.prototype`
	- Clean and focused
	- Actively maintained
	- [Used by ~23,000 packages](https://www.npmjs.com/browse/depended/chalk) as of December 31, 2017


	## Install

	```console
	$ npm install chalk
	```

	<a href="https://www.patreon.com/sindresorhus">
	<img src="https://c5.patreon.com/external/logo/become_a_patron_button@2x.png" width="160">
	</a>


	## Usage

	```js
	const chalk = require('chalk');

	console.log(chalk.blue('Hello world!'));
	```

	Chalk comes with an easy to use composable API where you just chain and nest the styles you want.

	```js
	const chalk = require('chalk');
	const log = console.log;

	// Combine styled and normal strings
	log(chalk.blue('Hello') + ' World' + chalk.red('!'));

	// Compose multiple styles using the chainable API
	log(chalk.blue.bgRed.bold('Hello world!'));

	// Pass in multiple arguments
	log(chalk.blue('Hello', 'World!', 'Foo', 'bar', 'biz', 'baz'));

	// Nest styles
	log(chalk.red('Hello', chalk.underline.bgBlue('world') + '!'));

	// Nest styles of the same type even (color, underline, background)
	log(chalk.green(
	'I am a green line ' +
	chalk.blue.underline.bold('with a blue substring') +
	' that becomes green again!'
	));

	// ES2015 template literal
	log(`
	CPU: ${chalk.red('90%')}
	RAM: ${chalk.green('40%')}
	DISK: ${chalk.yellow('70%')}
	`);

	// ES2015 tagged template literal
	log(chalk`
	CPU: {red ${cpu.totalPercent}%}
	RAM: {green ${ram.used / ram.total * 100}%}
	DISK: {rgb(255,131,0) ${disk.used / disk.total * 100}%}
	`);

	// Use RGB colors in terminal emulators that support it.
	log(chalk.keyword('orange')('Yay for orange colored text!'));
	log(chalk.rgb(123, 45, 67).underline('Underlined reddish color'));
	log(chalk.hex('#DEADED').bold('Bold gray!'));
	```

	Easily define your own themes:

	```js
	const chalk = require('chalk');

	const error = chalk.bold.red;
	const warning = chalk.keyword('orange');

	console.log(error('Error!'));
	console.log(warning('Warning!'));
	```

	Take advantage of console.log [string substitution](https://nodejs.org/docs/latest/api/console.html#console_console_log_data_args):

	```js
	const name = 'Sindre';
	console.log(chalk.green('Hello %s'), name);
	//=> 'Hello Sindre'
	```


	## API

	### chalk.`<style>[.<style>...](string, [string...])`

	Example: `chalk.red.bold.underline('Hello', 'world');`

	Chain [styles](#styles) and call the last one as a method with a string argument. Order doesn't matter, and later styles take precedent in case of a conflict. This simply means that `chalk.red.yellow.green` is equivalent to `chalk.green`.

	Multiple arguments will be separated by space.

	### chalk.enabled

	Color support is automatically detected, as is the level (see `chalk.level`). However, if you'd like to simply enable/disable Chalk, you can do so via the `.enabled` property.

	Chalk is enabled by default unless explicitly disabled via the constructor or `chalk.level` is `0`.

	If you need to change this in a reusable module, create a new instance:

	```js
	const ctx = new chalk.constructor({enabled: false});
	```

	### chalk.level

	Color support is automatically detected, but you can override it by setting the `level` property. You should however only do this in your own code as it applies globally to all Chalk consumers.

	If you need to change this in a reusable module, create a new instance:

	```js
	const ctx = new chalk.constructor({level: 0});
	```

	Levels are as follows:

	0. All colors disabled
	1. Basic color support (16 colors)
	2. 256 color support
	3. Truecolor support (16 million colors)

	### chalk.supportsColor

	Detect whether the terminal [supports color](https://github.com/chalk/supports-color). Used internally and handled for you, but exposed for convenience.

	Can be overridden by the user with the flags `--color` and `--no-color`. For situations where using `--color` is not possible, add the environment variable `FORCE_COLOR=1` to forcefully enable color or `FORCE_COLOR=0` to forcefully disable. The use of `FORCE_COLOR` overrides all other color support checks.

	Explicit 256/Truecolor mode can be enabled using the `--color=256` and `--color=16m` flags, respectively.


	## Styles

	### Modifiers

	- `reset`
	- `bold`
	- `dim`
	- `italic` (Not widely supported)
	- `underline`
	- `inverse`
	- `hidden`
	- `strikethrough` (Not widely supported)
	- `visible` (Text is emitted only if enabled)

	### Colors

	- `black`
	- `red`
	- `green`
	- `yellow`
	- `blue` (On Windows the bright version is used since normal blue is illegible)
	- `magenta`
	- `cyan`
	- `white`
	- `gray` ("bright black")
	- `redBright`
	- `greenBright`
	- `yellowBright`
	- `blueBright`
	- `magentaBright`
	- `cyanBright`
	- `whiteBright`

	### Background colors

	- `bgBlack`
	- `bgRed`
	- `bgGreen`
	- `bgYellow`
	- `bgBlue`
	- `bgMagenta`
	- `bgCyan`
	- `bgWhite`
	- `bgBlackBright`
	- `bgRedBright`
	- `bgGreenBright`
	- `bgYellowBright`
	- `bgBlueBright`
	- `bgMagentaBright`
	- `bgCyanBright`
	- `bgWhiteBright`


	## Tagged template literal

	Chalk can be used as a [tagged template literal](http://exploringjs.com/es6/ch_template-literals.html#_tagged-template-literals).

	```js
	const chalk = require('chalk');

	const miles = 18;
	const calculateFeet = miles => miles * 5280;

	console.log(chalk`
	There are {bold 5280 feet} in a mile.
	In {bold ${miles} miles}, there are {green.bold ${calculateFeet(miles)} feet}.
	`);
	```

	Blocks are delimited by an opening curly brace (`{`), a style, some content, and a closing curly brace (`}`).

	Template styles are chained exactly like normal Chalk styles. The following two statements are equivalent:

	```js
	console.log(chalk.bold.rgb(10, 100, 200)('Hello!'));
	console.log(chalk`{bold.rgb(10,100,200) Hello!}`);
	```

	Note that function styles (`rgb()`, `hsl()`, `keyword()`, etc.) may not contain spaces between parameters.

	All interpolated values (`` chalk`${foo}` ``) are converted to strings via the `.toString()` method. All curly braces (`{` and `}`) in interpolated value strings are escaped.


	## 256 and Truecolor color support

	Chalk supports 256 colors and [Truecolor](https://gist.github.com/XVilka/8346728) (16 million colors) on supported terminal apps.

	Colors are downsampled from 16 million RGB values to an ANSI color format that is supported by the terminal emulator (or by specifying `{level: n}` as a Chalk option). For example, Chalk configured to run at level 1 (basic color support) will downsample an RGB value of #FF0000 (red) to 31 (ANSI escape for red).

	Examples:

	- `chalk.hex('#DEADED').underline('Hello, world!')`
	- `chalk.keyword('orange')('Some orange text')`
	- `chalk.rgb(15, 100, 204).inverse('Hello!')`

	Background versions of these models are prefixed with `bg` and the first level of the module capitalized (e.g. `keyword` for foreground colors and `bgKeyword` for background colors).

	- `chalk.bgHex('#DEADED').underline('Hello, world!')`
	- `chalk.bgKeyword('orange')('Some orange text')`
	- `chalk.bgRgb(15, 100, 204).inverse('Hello!')`

	The following color models can be used:

	- [`rgb`](https://en.wikipedia.org/wiki/RGB_color_model) - Example: `chalk.rgb(255, 136, 0).bold('Orange!')`
	- [`hex`](https://en.wikipedia.org/wiki/Web_colors#Hex_triplet) - Example: `chalk.hex('#FF8800').bold('Orange!')`
	- [`keyword`](https://www.w3.org/wiki/CSS/Properties/color/keywords) (CSS keywords) - Example: `chalk.keyword('orange').bold('Orange!')`
	- [`hsl`](https://en.wikipedia.org/wiki/HSL_and_HSV) - Example: `chalk.hsl(32, 100, 50).bold('Orange!')`
	- [`hsv`](https://en.wikipedia.org/wiki/HSL_and_HSV) - Example: `chalk.hsv(32, 100, 100).bold('Orange!')`
	- [`hwb`](https://en.wikipedia.org/wiki/HWB_color_model) - Example: `chalk.hwb(32, 0, 50).bold('Orange!')`
	- `ansi16`
	- `ansi256`


	## Windows

	If you're on Windows, do yourself a favor and use [`cmder`](http://cmder.net/) instead of `cmd.exe`.


	## Origin story

	[colors.js](https://github.com/Marak/colors.js) used to be the most popular string styling module, but it has serious deficiencies like extending `String.prototype` which causes all kinds of [problems](https://github.com/yeoman/yo/issues/68) and the package is unmaintained. Although there are other packages, they either do too much or not enough. Chalk is a clean and focused alternative.


	## Related

	- [chalk-cli](https://github.com/chalk/chalk-cli) - CLI for this module
	- [ansi-styles](https://github.com/chalk/ansi-styles) - ANSI escape codes for styling strings in the terminal
	- [supports-color](https://github.com/chalk/supports-color) - Detect whether a terminal supports color
	- [strip-ansi](https://github.com/chalk/strip-ansi) - Strip ANSI escape codes
	- [strip-ansi-stream](https://github.com/chalk/strip-ansi-stream) - Strip ANSI escape codes from a stream
	- [has-ansi](https://github.com/chalk/has-ansi) - Check if a string has ANSI escape codes
	- [ansi-regex](https://github.com/chalk/ansi-regex) - Regular expression for matching ANSI escape codes
	- [wrap-ansi](https://github.com/chalk/wrap-ansi) - Wordwrap a string with ANSI escape codes
	- [slice-ansi](https://github.com/chalk/slice-ansi) - Slice a string with ANSI escape codes
	- [color-convert](https://github.com/qix-/color-convert) - Converts colors between different models
	- [chalk-animation](https://github.com/bokub/chalk-animation) - Animate strings in the terminal
	- [gradient-string](https://github.com/bokub/gradient-string) - Apply color gradients to strings
	- [chalk-pipe](https://github.com/LitoMore/chalk-pipe) - Create chalk style schemes with simpler style strings
	- [terminal-link](https://github.com/sindresorhus/terminal-link) - Create clickable links in the terminal


	## Maintainers

	- [Sindre Sorhus](https://github.com/sindresorhus)
	- [Josh Junon](https://github.com/qix-)


	## License

	MIT