text: // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  // TODO: Having to to do this because inspect() is used, and requiring this file normally blows at parsing debugLog()
  
  const getOwnPropertyDescriptors = Object.getOwnPropertyDescriptors ||
    function getOwnPropertyDescriptors (obj) {
      var keys = Object.keys(obj)
      var descriptors = {}
      for (var i = 0; i < keys.length; i++) {
        descriptors[keys[i]] = Object.getOwnPropertyDescriptor(obj, keys[i])
      }
      return descriptors
    }
  
  var formatRegExp = /%[sdj%]/g
  exports.format = function (f) {
    if (!isString(f)) {
      var objects = []
      for (var i = 0; i < arguments.length; i++) {
        objects.push(inspect(arguments[i]))
      }
      return objects.join(' ')
    }
  
    var i = 1
    var args = arguments
    var len = args.length
    var str = String(f).replace(formatRegExp, function (x) {
      if (x === '%%') return '%'
      if (i >= len) return x
      switch (x) {
        case '%s':
          return String(args[i++])
        case '%d':
          return Number(args[i++])
        case '%j':
          try {
            return JSON.stringify(args[i++])
          } catch (_) {
            return '[Circular]'
          }
        default:
          return x
      }
    })
    for (var x = args[i]; i < len; x = args[++i]) {
      if (isNull(x) || !isObject(x)) {
        str += ' ' + x
      } else {
        str += ' ' + inspect(x)
      }
    }
    return str
  }
  
  // Mark that a method should not be used.
  // Returns a modified function which warns once by default.
  // If --no-deprecation is set, then it is a no-op.
  exports.deprecate = function (fn, msg) {
    if (typeof process !== 'undefined' && process.noDeprecation === true) {
      return fn
    }
  
    // Allow for deprecating things in the process of starting up.
    if (typeof process === 'undefined') {
      return function () {
        return exports.deprecate(fn, msg).apply(this, arguments)
      }
    }
  
    var warned = false
  
    function deprecated () {
      if (!warned) {
        if (process.throwDeprecation) {
          throw new Error(msg)
        } else if (process.traceDeprecation) {
          console.trace(msg)
        } else {
          console.error(msg)
        }
        warned = true
      }
      return fn.apply(this, arguments)
    }
  
    return deprecated
  }
  
  // TODO: THIS MAKES CHROME BLOW-UP!
  // var debugs = {};
  // var debugEnviron;
  // exports.debuglog = function(set) {
  //   if (isUndefined(debugEnviron))
  //     debugEnviron = process.env.NODE_DEBUG || '';
  //   set = set.toUpperCase();
  //   if (!debugs[set]) {
  //     if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
  //       var pid = process.pid;
  //       debugs[set] = function() {
  //         var msg = exports.format.apply(exports, arguments);
  //         console.error('%s %d: %s', set, pid, msg);
  //       };
  //     } else {
  //       debugs[set] = function() {};
  //     }
  //   }
  //   return debugs[set];
  // };
  
  function inspect (obj, opts) {
    // default options
    var ctx = {
      seen: [],
      stylize: stylizeNoColor
    }
    // legacy...
    if (arguments.length >= 3) ctx.depth = arguments[2]
    if (arguments.length >= 4) ctx.colors = arguments[3]
    if (isBoolean(opts)) {
      // legacy...
      ctx.showHidden = opts
    } else if (opts) {
      // got an "options" object
      exports._extend(ctx, opts)
    }
    // set default options
    if (isUndefined(ctx.showHidden)) ctx.showHidden = false
    if (isUndefined(ctx.depth)) ctx.depth = 2
    if (isUndefined(ctx.colors)) ctx.colors = false
    if (isUndefined(ctx.customInspect)) ctx.customInspect = true
    if (ctx.colors) ctx.stylize = stylizeWithColor
    return formatValue(ctx, obj, ctx.depth)
  }
  
  exports.inspect = inspect
  
  // http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
  inspect.colors = {
    'bold': [1, 22],
    'italic': [3, 23],
    'underline': [4, 24],
    'inverse': [7, 27],
    'white': [37, 39],
    'grey': [90, 39],
    'black': [30, 39],
    'blue': [34, 39],
    'cyan': [36, 39],
    'green': [32, 39],
    'magenta': [35, 39],
    'red': [31, 39],
    'yellow': [33, 39]
  }
  
  // Don't use 'blue' not visible on cmd.exe
  inspect.styles = {
    'special': 'cyan',
    'number': 'yellow',
    'boolean': 'yellow',
    'undefined': 'grey',
    'null': 'bold',
    'string': 'green',
    'date': 'magenta',
    // "name": intentionally not styling
    'regexp': 'red'
  }
  
  function stylizeWithColor (str, styleType) {
    var style = inspect.styles[styleType]
  
    if (style) {
      return '\u001b[' + inspect.colors[style][0] + 'm' + str +
        '\u001b[' + inspect.colors[style][1] + 'm'
    } else {
      return str
    }
  }
  
  function stylizeNoColor (str, styleType) {
    return str
  }
  
  function arrayToHash (array) {
    var hash = {}
  
    array.forEach(function (val, idx) {
      hash[val] = true
    })
  
    return hash
  }
  
  function formatValue (ctx, value, recurseTimes) {
    // Provide a hook for user-specified inspect functions.
    // Check that value is an object with an inspect function on it
    if (ctx.customInspect &&
      value &&
      isFunction(value.inspect) &&
      // Filter out the util module, it's inspect function is special
      value.inspect !== exports.inspect &&
      // Also filter out any prototype objects using the circular check.
      !(value.constructor && value.constructor.prototype === value)) {
      var ret = value.inspect(recurseTimes, ctx)
      if (!isString(ret)) {
        ret = formatValue(ctx, ret, recurseTimes)
      }
      return ret
    }
  
    // Primitive types cannot have properties
    var primitive = formatPrimitive(ctx, value)
    if (primitive) {
      return primitive
    }
  
    // Look up the keys of the object.
    var keys = Object.keys(value)
    var visibleKeys = arrayToHash(keys)
  
    if (ctx.showHidden) {
      keys = Object.getOwnPropertyNames(value)
    }
  
    // IE doesn't make error fields non-enumerable
    // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
    if (isError(value)
      && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
      return formatError(value)
    }
  
    // Some type of object without properties can be shortcutted.
    if (keys.length === 0) {
      if (isFunction(value)) {
        var name = value.name ? ': ' + value.name : ''
        return ctx.stylize('[Function' + name + ']', 'special')
      }
      if (isRegExp(value)) {
        return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp')
      }
      if (isDate(value)) {
        return ctx.stylize(Date.prototype.toString.call(value), 'date')
      }
      if (isError(value)) {
        return formatError(value)
      }
    }
  
    var base = '', array = false, braces = ['{', '}']
  
    // Make Array say that they are Array
    if (isArray(value)) {
      array = true
      braces = ['[', ']']
    }
  
    // Make functions say that they are functions
    if (isFunction(value)) {
      var n = value.name ? ': ' + value.name : ''
      base = ' [Function' + n + ']'
    }
  
    // Make RegExps say that they are RegExps
    if (isRegExp(value)) {
      base = ' ' + RegExp.prototype.toString.call(value)
    }
  
    // Make dates with properties first say the date
    if (isDate(value)) {
      base = ' ' + Date.prototype.toUTCString.call(value)
    }
  
    // Make error with message first say the error
    if (isError(value)) {
      base = ' ' + formatError(value)
    }
  
    if (keys.length === 0 && (!array || value.length == 0)) {
      return braces[0] + base + braces[1]
    }
  
    if (recurseTimes < 0) {
      if (isRegExp(value)) {
        return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp')
      } else {
        return ctx.stylize('[Object]', 'special')
      }
    }
  
    ctx.seen.push(value)
  
    var output
    if (array) {
      output = formatArray(ctx, value, recurseTimes, visibleKeys, keys)
    } else {
      output = keys.map(function (key) {
        return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array)
      })
    }
  
    ctx.seen.pop()
  
    return reduceToSingleString(output, base, braces)
  }
  
  function formatPrimitive (ctx, value) {
    if (isUndefined(value))
      return ctx.stylize('undefined', 'undefined')
    if (isString(value)) {
      var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
        .replace(/'/g, '\\\'')
        .replace(/\\"/g, '"') + '\''
      return ctx.stylize(simple, 'string')
    }
    if (isNumber(value))
      return ctx.stylize('' + value, 'number')
    if (isBoolean(value))
      return ctx.stylize('' + value, 'boolean')
    // For some reason typeof null is "object", so special case here.
    if (isNull(value))
      return ctx.stylize('null', 'null')
  }
  
  function formatError (value) {
    return '[' + Error.prototype.toString.call(value) + ']'
  }
  
  function formatArray (ctx, value, recurseTimes, visibleKeys, keys) {
    var output = []
    for (var i = 0, l = value.length; i < l; ++i) {
      if (hasOwnProperty(value, String(i))) {
        output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
          String(i), true))
      } else {
        output.push('')
      }
    }
    keys.forEach(function (key) {
      if (!key.match(/^\d+$/)) {
        output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
          key, true))
      }
    })
    return output
  }
  
  function formatProperty (ctx, value, recurseTimes, visibleKeys, key, array) {
    var name, str, desc
    desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] }
    if (desc.get) {
      if (desc.set) {
        str = ctx.stylize('[Getter/Setter]', 'special')
      } else {
        str = ctx.stylize('[Getter]', 'special')
      }
    } else {
      if (desc.set) {
        str = ctx.stylize('[Setter]', 'special')
      }
    }
    if (!hasOwnProperty(visibleKeys, key)) {
      name = '[' + key + ']'
    }
    if (!str) {
      if (ctx.seen.indexOf(desc.value) < 0) {
        if (isNull(recurseTimes)) {
          str = formatValue(ctx, desc.value, null)
        } else {
          str = formatValue(ctx, desc.value, recurseTimes - 1)
        }
        if (str.indexOf('\n') > -1) {
          if (array) {
            str = str.split('\n').map(function (line) {
              return '  ' + line
            }).join('\n').substr(2)
          } else {
            str = '\n' + str.split('\n').map(function (line) {
              return '   ' + line
            }).join('\n')
          }
        }
      } else {
        str = ctx.stylize('[Circular]', 'special')
      }
    }
    if (isUndefined(name)) {
      if (array && key.match(/^\d+$/)) {
        return str
      }
      name = JSON.stringify('' + key)
      if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
        name = name.substr(1, name.length - 2)
        name = ctx.stylize(name, 'name')
      } else {
        name = name.replace(/'/g, '\\\'')
          .replace(/\\"/g, '"')
          .replace(/(^"|"$)/g, '\'')
        name = ctx.stylize(name, 'string')
      }
    }
  
    return name + ': ' + str
  }
  
  function reduceToSingleString (output, base, braces) {
    var numLinesEst = 0
    var length = output.reduce(function (prev, cur) {
      numLinesEst++
      if (cur.indexOf('\n') >= 0) numLinesEst++
      return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1
    }, 0)
  
    if (length > 60) {
      return braces[0] +
        (base === '' ? '' : base + '\n ') +
        ' ' +
        output.join(',\n  ') +
        ' ' +
        braces[1]
    }
  
    return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1]
  }
  
  // NOTE: These type checking functions intentionally don't use `instanceof`
  // because it is fragile and can be easily faked with `Object.create()`.
  function isArray (ar) {
    return Array.isArray(ar)
  }
  
  exports.isArray = isArray
  
  function isBoolean (arg) {
    return typeof arg === 'boolean'
  }
  
  exports.isBoolean = isBoolean
  
  function isNull (arg) {
    return arg === null
  }
  
  exports.isNull = isNull
  
  function isNullOrUndefined (arg) {
    return arg == null
  }
  
  exports.isNullOrUndefined = isNullOrUndefined
  
  function isNumber (arg) {
    return typeof arg === 'number'
  }
  
  exports.isNumber = isNumber
  
  function isString (arg) {
    return typeof arg === 'string'
  }
  
  exports.isString = isString
  
  function isSymbol (arg) {
    return typeof arg === 'symbol'
  }
  
  exports.isSymbol = isSymbol
  
  function isUndefined (arg) {
    return arg === void 0
  }
  
  exports.isUndefined = isUndefined
  
  function isRegExp (re) {
    return isObject(re) && objectToString(re) === '[object RegExp]'
  }
  
  exports.isRegExp = isRegExp
  
  function isObject (arg) {
    return typeof arg === 'object' && arg !== null
  }
  
  exports.isObject = isObject
  
  function isDate (d) {
    return isObject(d) && objectToString(d) === '[object Date]'
  }
  
  exports.isDate = isDate
  
  function isError (e) {
    return isObject(e) &&
      (objectToString(e) === '[object Error]' || e instanceof Error)
  }
  
  exports.isError = isError
  
  function isFunction (arg) {
    return typeof arg === 'function'
  }
  
  exports.isFunction = isFunction
  
  function isPrimitive (arg) {
    return arg === null ||
      typeof arg === 'boolean' ||
      typeof arg === 'number' ||
      typeof arg === 'string' ||
      typeof arg === 'symbol' ||  // ES6 symbol
      typeof arg === 'undefined'
  }
  
  exports.isPrimitive = isPrimitive
  
  // exports.isBuffer = require('./support/isBuffer');
  
  function objectToString (o) {
    return Object.prototype.toString.call(o)
  }
  
  function pad (n) {
    return n < 10 ? '0' + n.toString(10) : n.toString(10)
  }
  
  var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
    'Oct', 'Nov', 'Dec']
  
  // 26 Feb 16:19:34
  function timestamp () {
    var d = new Date()
    var time = [pad(d.getHours()),
      pad(d.getMinutes()),
      pad(d.getSeconds())].join(':')
    return [d.getDate(), months[d.getMonth()], time].join(' ')
  }
  
  // log is just a thin wrapper to console.log that prepends a timestamp
  exports.log = function () {
    console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments))
  }
  
  // exports.inherits = require('inherits');
  
  exports._extend = function (origin, add) {
    // Don't do anything if add isn't an object
    if (!add || !isObject(add)) return origin
  
    var keys = Object.keys(add)
    var i = keys.length
    while (i--) {
      origin[keys[i]] = add[keys[i]]
    }
    return origin
  }
  
  function hasOwnProperty (obj, prop) {
    return Object.prototype.hasOwnProperty.call(obj, prop)
  }
  
  var kCustomPromisifiedSymbol = typeof Symbol !== 'undefined' ? Symbol('util.promisify.custom') : undefined
  
  exports.promisify = function promisify (original) {
    if (typeof original !== 'function')
      throw new TypeError('The "original" argument must be of type Function')
  
    if (kCustomPromisifiedSymbol && original[kCustomPromisifiedSymbol]) {
      var fn = original[kCustomPromisifiedSymbol]
      if (typeof fn !== 'function') {
        throw new TypeError('The "util.promisify.custom" argument must be of type Function')
      }
      Object.defineProperty(fn, kCustomPromisifiedSymbol, {
        value: fn, enumerable: false, writable: false, configurable: true
      })
      return fn
    }
  
    function fn () {
      var promiseResolve, promiseReject
      var promise = new Promise(function (resolve, reject) {
        promiseResolve = resolve
        promiseReject = reject
      })
  
      var args = []
      for (var i = 0; i < arguments.length; i++) {
        args.push(arguments[i])
      }
      args.push(function (err, value) {
        if (err) {
          promiseReject(err)
        } else {
          promiseResolve(value)
        }
      })
  
      try {
        original.apply(this, args)
      } catch (err) {
        promiseReject(err)
      }
  
      return promise
    }
  
    Object.setPrototypeOf(fn, Object.getPrototypeOf(original))
  
    if (kCustomPromisifiedSymbol) Object.defineProperty(fn, kCustomPromisifiedSymbol, {
      value: fn, enumerable: false, writable: false, configurable: true
    })
    return Object.defineProperties(
      fn,
      getOwnPropertyDescriptors(original)
    )
  }
  
  exports.promisify.custom = kCustomPromisifiedSymbol
  
  function callbackifyOnRejected (reason, cb) {
    // `!reason` guard inspired by bluebird (Ref: https://goo.gl/t5IS6M).
    // Because `null` is a special error value in callbacks which means "no error
    // occurred", we error-wrap so the callback consumer can distinguish between
    // "the promise rejected with null" or "the promise fulfilled with undefined".
    if (!reason) {
      var newReason = new Error('Promise was rejected with a falsy value')
      newReason.reason = reason
      reason = newReason
    }
    return cb(reason)
  }
  
  function callbackify (original) {
    if (typeof original !== 'function') {
      throw new TypeError('The "original" argument must be of type Function')
    }
  
    // We DO NOT return the promise as it gives the user a false sense that
    // the promise is actually somehow related to the callback's execution
    // and that the callback throwing will reject the promise.
    function callbackified () {
      var args = []
      for (var i = 0; i < arguments.length; i++) {
        args.push(arguments[i])
      }
  
      var maybeCb = args.pop()
      if (typeof maybeCb !== 'function') {
        throw new TypeError('The last argument must be of type Function')
      }
      var self = this
      var cb = function () {
        return maybeCb.apply(self, arguments)
      }
      // In true node style we process the callback on `nextTick` with all the
      // implications (stack, `uncaughtException`, `async_hooks`)
      original.apply(this, args)
        .then(function (ret) { process.nextTick(cb, null, ret) },
          function (rej) { process.nextTick(callbackifyOnRejected, rej, cb) })
    }
  
    Object.setPrototypeOf(callbackified, Object.getPrototypeOf(original))
    Object.defineProperties(callbackified,
      getOwnPropertyDescriptors(original))
    return callbackified
  }
  
  exports.callbackify = callbackify
  