picocolors.js

let argv = process.argv || [],
	env = process.env
let isColorSupported =
	!("NO_COLOR" in env || argv.includes("--no-color")) &&
	("FORCE_COLOR" in env ||
		argv.includes("--color") ||
		process.platform === "win32" ||
		(require != null && require("tty").isatty(1) && env.TERM !== "dumb") ||
		"CI" in env)

let formatter =
	(open, close, replace = open) =>
	input => {
		let string = "" + input
		let index = string.indexOf(close, open.length)
		return ~index
			? open + replaceClose(string, close, replace, index) + close
			: open + string + close
	}

let replaceClose = (string, close, replace, index) => {
	let start = string.substring(0, index) + replace
	let end = string.substring(index + close.length)
	let nextIndex = end.indexOf(close)
	return ~nextIndex ? start + replaceClose(end, close, replace, nextIndex) : start + end
}

let createColors = (enabled = isColorSupported) => ({
	isColorSupported: enabled,
	reset: enabled ? s => `\x1b[0m${s}\x1b[0m` : String,
	bold: enabled ? formatter("\x1b[1m", "\x1b[22m", "\x1b[22m\x1b[1m") : String,
	dim: enabled ? formatter("\x1b[2m", "\x1b[22m", "\x1b[22m\x1b[2m") : String,
	italic: enabled ? formatter("\x1b[3m", "\x1b[23m") : String,
	underline: enabled ? formatter("\x1b[4m", "\x1b[24m") : String,
	inverse: enabled ? formatter("\x1b[7m", "\x1b[27m") : String,
	hidden: enabled ? formatter("\x1b[8m", "\x1b[28m") : String,
	strikethrough: enabled ? formatter("\x1b[9m", "\x1b[29m") : String,
	black: enabled ? formatter("\x1b[30m", "\x1b[39m") : String,
	red: enabled ? formatter("\x1b[31m", "\x1b[39m") : String,
	green: enabled ? formatter("\x1b[32m", "\x1b[39m") : String,
	yellow: enabled ? formatter("\x1b[33m", "\x1b[39m") : String,
	blue: enabled ? formatter("\x1b[34m", "\x1b[39m") : String,
	magenta: enabled ? formatter("\x1b[35m", "\x1b[39m") : String,
	cyan: enabled ? formatter("\x1b[36m", "\x1b[39m") : String,
	white: enabled ? formatter("\x1b[37m", "\x1b[39m") : String,
	gray: enabled ? formatter("\x1b[90m", "\x1b[39m") : String,
	bgBlack: enabled ? formatter("\x1b[40m", "\x1b[49m") : String,
	bgRed: enabled ? formatter("\x1b[41m", "\x1b[49m") : String,
	bgGreen: enabled ? formatter("\x1b[42m", "\x1b[49m") : String,
	bgYellow: enabled ? formatter("\x1b[43m", "\x1b[49m") : String,
	bgBlue: enabled ? formatter("\x1b[44m", "\x1b[49m") : String,
	bgMagenta: enabled ? formatter("\x1b[45m", "\x1b[49m") : String,
	bgCyan: enabled ? formatter("\x1b[46m", "\x1b[49m") : String,
	bgWhite: enabled ? formatter("\x1b[47m", "\x1b[49m") : String,
})

module.exports = createColors()
module.exports.createColors = createColors