mirror of https://github.com/nodejs/node.git
51 lines
1.9 KiB
JavaScript
51 lines
1.9 KiB
JavaScript
const { formatWithOptions: baseFormatWithOptions } = require('node:util')
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// These are most assuredly not a mistake
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// https://eslint.org/docs/latest/rules/no-control-regex
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// \x00 through \x1f, \x7f through \x9f, not including \x09 \x0a \x0b \x0d
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/* eslint-disable-next-line no-control-regex */
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const HAS_C01 = /[\x00-\x08\x0c\x0e-\x1f\x7f-\x9f]/
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// Allows everything up to '[38;5;255m' in 8 bit notation
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const ALLOWED_SGR = /^\[[0-9;]{0,8}m/
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// '[38;5;255m'.length
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const SGR_MAX_LEN = 10
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// Strips all ANSI C0 and C1 control characters (except for SGR up to 8 bit)
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function STRIP_C01 (str) {
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if (!HAS_C01.test(str)) {
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return str
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}
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let result = ''
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for (let i = 0; i < str.length; i++) {
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const char = str[i]
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const code = char.charCodeAt(0)
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if (!HAS_C01.test(char)) {
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// Most characters are in this set so continue early if we can
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result = `${result}${char}`
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} else if (code === 27 && ALLOWED_SGR.test(str.slice(i + 1, i + SGR_MAX_LEN + 1))) {
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// \x1b with allowed SGR
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result = `${result}\x1b`
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} else if (code <= 31) {
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// escape all other C0 control characters besides \x7f
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result = `${result}^${String.fromCharCode(code + 64)}`
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} else {
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// hasC01 ensures this is now a C1 control character or \x7f
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result = `${result}^${String.fromCharCode(code - 64)}`
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}
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}
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return result
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}
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const formatWithOptions = ({ prefix: prefixes = [], eol = '\n', ...options }, ...args) => {
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const prefix = prefixes.filter(p => p != null).join(' ')
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const formatted = STRIP_C01(baseFormatWithOptions(options, ...args))
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// Splitting could be changed to only `\n` once we are sure we only emit unix newlines.
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// The eol param to this function will put the correct newlines in place for the returned string.
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const lines = formatted.split(/\r?\n/)
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return lines.reduce((acc, l) => `${acc}${prefix}${prefix && l ? ' ' : ''}${l}${eol}`, '')
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}
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module.exports = { formatWithOptions }
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