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import tty from 'node:tty';
// eslint-disable-next-line no-warning-comments
// TODO: Use a better method when it's added to Node.js (https://github.com/nodejs/node/pull/40240)
// Lots of optionals here to support Deno.
const hasColors = tty?.WriteStream?.prototype?.hasColors?.() ?? false;
const format = (open, close) => { if (!hasColors) { return input => input; }
const openCode = `\u001B[${open}m`; const closeCode = `\u001B[${close}m`;
return input => { const string = input + ''; // eslint-disable-line no-implicit-coercion -- This is faster.
let index = string.indexOf(closeCode);
if (index === -1) { // Note: Intentionally not using string interpolation for performance reasons.
return openCode + string + closeCode; }
// Handle nested colors.
// We could have done this, but it's too slow (as of Node.js 22).
// return openCode + string.replaceAll(closeCode, (close === 22 ? closeCode : '') + openCode) + closeCode;
let result = openCode; let lastIndex = 0;
// SGR 22 resets both bold (1) and dim (2). When we encounter a nested
// close for styles that use 22, we need to re-open the outer style.
const reopenOnNestedClose = close === 22; const replaceCode = (reopenOnNestedClose ? closeCode : '') + openCode;
while (index !== -1) { result += string.slice(lastIndex, index) + replaceCode; lastIndex = index + closeCode.length; index = string.indexOf(closeCode, lastIndex); }
result += string.slice(lastIndex) + closeCode;
return result; };};
export const reset = format(0, 0);export const bold = format(1, 22);export const dim = format(2, 22);export const italic = format(3, 23);export const underline = format(4, 24);export const overline = format(53, 55);export const inverse = format(7, 27);export const hidden = format(8, 28);export const strikethrough = format(9, 29);
export const black = format(30, 39);export const red = format(31, 39);export const green = format(32, 39);export const yellow = format(33, 39);export const blue = format(34, 39);export const magenta = format(35, 39);export const cyan = format(36, 39);export const white = format(37, 39);export const gray = format(90, 39);
export const bgBlack = format(40, 49);export const bgRed = format(41, 49);export const bgGreen = format(42, 49);export const bgYellow = format(43, 49);export const bgBlue = format(44, 49);export const bgMagenta = format(45, 49);export const bgCyan = format(46, 49);export const bgWhite = format(47, 49);export const bgGray = format(100, 49);
export const redBright = format(91, 39);export const greenBright = format(92, 39);export const yellowBright = format(93, 39);export const blueBright = format(94, 39);export const magentaBright = format(95, 39);export const cyanBright = format(96, 39);export const whiteBright = format(97, 39);
export const bgRedBright = format(101, 49);export const bgGreenBright = format(102, 49);export const bgYellowBright = format(103, 49);export const bgBlueBright = format(104, 49);export const bgMagentaBright = format(105, 49);export const bgCyanBright = format(106, 49);export const bgWhiteBright = format(107, 49);
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