| 1 | let tty = require("tty")
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| 2 |
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| 3 | let isColorSupported =
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| 4 | !("NO_COLOR" in process.env || process.argv.includes("--no-color")) &&
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| 5 | ("FORCE_COLOR" in process.env ||
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| 6 | process.argv.includes("--color") ||
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| 7 | process.platform === "win32" ||
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| 8 | (tty.isatty(1) && process.env.TERM !== "dumb") ||
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| 9 | "CI" in process.env)
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| 10 |
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| 11 | function formatter(open, close, replace = open) {
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| 12 | return (input) => {
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| 13 | let string = "" + input
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| 14 | let index = string.indexOf(close, open.length)
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| 15 | return !~index
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| 16 | ? open + string + close
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| 17 | : open + replaceClose(string, close, replace, index) + close
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| 18 | }
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| 19 | }
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| 20 |
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| 21 | function replaceClose(string, close, replace, index) {
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| 22 | let start = string.substring(0, index) + replace
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| 23 | let end = string.substring(index + close.length)
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| 24 | let nextIndex = end.indexOf(close)
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| 25 | return !~nextIndex ? start + end : start + replaceClose(end, close, replace, nextIndex)
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| 26 | }
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| 27 |
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| 28 | function createColors(enabled = isColorSupported) {
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| 29 | return {
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| 30 | isColorSupported: enabled,
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| 31 | reset: enabled ? (s) => `\x1b[0m${s}\x1b[0m` : String,
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| 32 | bold: enabled ? formatter("\x1b[1m", "\x1b[22m", "\x1b[22m\x1b[1m") : String,
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| 33 | dim: enabled ? formatter("\x1b[2m", "\x1b[22m", "\x1b[22m\x1b[2m") : String,
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| 34 | italic: enabled ? formatter("\x1b[3m", "\x1b[23m") : String,
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| 35 | underline: enabled ? formatter("\x1b[4m", "\x1b[24m") : String,
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| 36 | inverse: enabled ? formatter("\x1b[7m", "\x1b[27m") : String,
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| 37 | hidden: enabled ? formatter("\x1b[8m", "\x1b[28m") : String,
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| 38 | strikethrough: enabled ? formatter("\x1b[9m", "\x1b[29m") : String,
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| 39 | black: enabled ? formatter("\x1b[30m", "\x1b[39m") : String,
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| 40 | red: enabled ? formatter("\x1b[31m", "\x1b[39m") : String,
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| 41 | green: enabled ? formatter("\x1b[32m", "\x1b[39m") : String,
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| 42 | yellow: enabled ? formatter("\x1b[33m", "\x1b[39m") : String,
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| 43 | blue: enabled ? formatter("\x1b[34m", "\x1b[39m") : String,
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| 44 | magenta: enabled ? formatter("\x1b[35m", "\x1b[39m") : String,
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| 45 | cyan: enabled ? formatter("\x1b[36m", "\x1b[39m") : String,
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| 46 | white: enabled ? formatter("\x1b[37m", "\x1b[39m") : String,
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| 47 | gray: enabled ? formatter("\x1b[90m", "\x1b[39m") : String,
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| 48 | bgBlack: enabled ? formatter("\x1b[40m", "\x1b[49m") : String,
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| 49 | bgRed: enabled ? formatter("\x1b[41m", "\x1b[49m") : String,
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| 50 | bgGreen: enabled ? formatter("\x1b[42m", "\x1b[49m") : String,
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| 51 | bgYellow: enabled ? formatter("\x1b[43m", "\x1b[49m") : String,
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| 52 | bgBlue: enabled ? formatter("\x1b[44m", "\x1b[49m") : String,
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| 53 | bgMagenta: enabled ? formatter("\x1b[45m", "\x1b[49m") : String,
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| 54 | bgCyan: enabled ? formatter("\x1b[46m", "\x1b[49m") : String,
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| 55 | bgWhite: enabled ? formatter("\x1b[47m", "\x1b[49m") : String,
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| 56 | }
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| 57 | }
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| 58 |
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| 59 | module.exports = createColors()
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| 60 | module.exports.createColors = createColors
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