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format.js2.1 KB · 57 lines
// All logging goes through here, both to console and log files const { formatWithOptions: baseFormatWithOptions } = require('node:util')const { redactLog } = require('@npmcli/redact') // These are most assuredly not a mistake// https://eslint.org/docs/latest/rules/no-control-regex// \x00 through \x1f, \x7f through \x9f, not including \x09 \x0a \x0b \x0d/* eslint-disable-next-line no-control-regex */const HAS_C01 = /[\x00-\x08\x0c\x0e-\x1f\x7f-\x9f]/ // Allows everything up to '[38;5;255m' in 8 bit notationconst ALLOWED_SGR = /^\[[0-9;]{0,8}m/ // '[38;5;255m'.lengthconst SGR_MAX_LEN = 10 // Strips all ANSI C0 and C1 control characters (except for SGR up to 8 bit)function STRIP_C01 (str) {  if (!HAS_C01.test(str)) {    return str  }  let result = ''  for (let i = 0; i < str.length; i++) {    const char = str[i]    const code = char.charCodeAt(0)    if (!HAS_C01.test(char)) {      // Most characters are in this set so continue early if we can      result = `${result}${char}`    } else if (code === 27 && ALLOWED_SGR.test(str.slice(i + 1, i + SGR_MAX_LEN + 1))) {      // \x1b with allowed SGR      result = `${result}\x1b`    } else if (code <= 31) {      // escape all other C0 control characters besides \x7f      result = `${result}^${String.fromCharCode(code + 64)}`    } else {      // hasC01 ensures this is now a C1 control character or \x7f      result = `${result}^${String.fromCharCode(code - 64)}`    }  }  return result} const formatWithOptions = ({ prefix: prefixes = [], eol = '\n', redact = true, ...options }, ...args) => {  const prefix = prefixes.filter(p => p != null).join(' ')  let formatted = STRIP_C01(baseFormatWithOptions(options, ...args))  if (redact) {    formatted = redactLog(formatted)  }  // Splitting could be changed to only `\n` once we are sure we only emit unix newlines.  // The eol param to this function will put the correct newlines in place for the returned string.  const lines = formatted.split(/\r?\n/)  return lines.reduce((acc, l) => `${acc}${prefix}${prefix && l ? ' ' : ''}${l}${eol}`, '')} module.exports = { formatWithOptions }