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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