Initial commit

node_modules/lru-cache/LICENSE

@@ -0,0 +1,15 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

node_modules/lru-cache/index.js

@@ -0,0 +1,467 @@
+'use strict'
+
+module.exports = LRUCache
+
+// This will be a proper iterable 'Map' in engines that support it,
+// or a fakey-fake PseudoMap in older versions.
+var Map = require('pseudomap')
+var util = require('util')
+
+// A linked list to keep track of recently-used-ness
+var Yallist = require('yallist')
+
+// use symbols if possible, otherwise just _props
+var hasSymbol = typeof Symbol === 'function'
+var makeSymbol
+if (hasSymbol) {
+  makeSymbol = function (key) {
+    return Symbol(key)
+  }
+} else {
+  makeSymbol = function (key) {
+    return '_' + key
+  }
+}
+
+var MAX = makeSymbol('max')
+var LENGTH = makeSymbol('length')
+var LENGTH_CALCULATOR = makeSymbol('lengthCalculator')
+var ALLOW_STALE = makeSymbol('allowStale')
+var MAX_AGE = makeSymbol('maxAge')
+var DISPOSE = makeSymbol('dispose')
+var NO_DISPOSE_ON_SET = makeSymbol('noDisposeOnSet')
+var LRU_LIST = makeSymbol('lruList')
+var CACHE = makeSymbol('cache')
+
+function naiveLength () { return 1 }
+
+// lruList is a yallist where the head is the youngest
+// item, and the tail is the oldest.  the list contains the Hit
+// objects as the entries.
+// Each Hit object has a reference to its Yallist.Node.  This
+// never changes.
+//
+// cache is a Map (or PseudoMap) that matches the keys to
+// the Yallist.Node object.
+function LRUCache (options) {
+  if (!(this instanceof LRUCache)) {
+    return new LRUCache(options)
+  }
+
+  if (typeof options === 'number') {
+    options = { max: options }
+  }
+
+  if (!options) {
+    options = {}
+  }
+
+  var max = this[MAX] = options.max
+  // Kind of weird to have a default max of Infinity, but oh well.
+  if (!max ||
+      !(typeof max === 'number') ||
+      max <= 0) {
+    this[MAX] = Infinity
+  }
+
+  var lc = options.length || naiveLength
+  if (typeof lc !== 'function') {
+    lc = naiveLength
+  }
+  this[LENGTH_CALCULATOR] = lc
+
+  this[ALLOW_STALE] = options.stale || false
+  this[MAX_AGE] = options.maxAge || 0
+  this[DISPOSE] = options.dispose
+  this[NO_DISPOSE_ON_SET] = options.noDisposeOnSet || false
+  this.reset()
+}
+
+// resize the cache when the max changes.
+Object.defineProperty(LRUCache.prototype, 'max', {
+  set: function (mL) {
+    if (!mL || !(typeof mL === 'number') || mL <= 0) {
+      mL = Infinity
+    }
+    this[MAX] = mL
+    trim(this)
+  },
+  get: function () {
+    return this[MAX]
+  },
+  enumerable: true
+})
+
+Object.defineProperty(LRUCache.prototype, 'allowStale', {
+  set: function (allowStale) {
+    this[ALLOW_STALE] = !!allowStale
+  },
+  get: function () {
+    return this[ALLOW_STALE]
+  },
+  enumerable: true
+})
+
+Object.defineProperty(LRUCache.prototype, 'maxAge', {
+  set: function (mA) {
+    if (!mA || !(typeof mA === 'number') || mA < 0) {
+      mA = 0
+    }
+    this[MAX_AGE] = mA
+    trim(this)
+  },
+  get: function () {
+    return this[MAX_AGE]
+  },
+  enumerable: true
+})
+
+// resize the cache when the lengthCalculator changes.
+Object.defineProperty(LRUCache.prototype, 'lengthCalculator', {
+  set: function (lC) {
+    if (typeof lC !== 'function') {
+      lC = naiveLength
+    }
+    if (lC !== this[LENGTH_CALCULATOR]) {
+      this[LENGTH_CALCULATOR] = lC
+      this[LENGTH] = 0
+      this[LRU_LIST].forEach(function (hit) {
+        hit.length = this[LENGTH_CALCULATOR](hit.value, hit.key)
+        this[LENGTH] += hit.length
+      }, this)
+    }
+    trim(this)
+  },
+  get: function () { return this[LENGTH_CALCULATOR] },
+  enumerable: true
+})
+
+Object.defineProperty(LRUCache.prototype, 'length', {
+  get: function () { return this[LENGTH] },
+  enumerable: true
+})
+
+Object.defineProperty(LRUCache.prototype, 'itemCount', {
+  get: function () { return this[LRU_LIST].length },
+  enumerable: true
+})
+
+LRUCache.prototype.rforEach = function (fn, thisp) {
+  thisp = thisp || this
+  for (var walker = this[LRU_LIST].tail; walker !== null;) {
+    var prev = walker.prev
+    forEachStep(this, fn, walker, thisp)
+    walker = prev
+  }
+}
+
+function forEachStep (self, fn, node, thisp) {
+  var hit = node.value
+  if (isStale(self, hit)) {
+    del(self, node)
+    if (!self[ALLOW_STALE]) {
+      hit = undefined
+    }
+  }
+  if (hit) {
+    fn.call(thisp, hit.value, hit.key, self)
+  }
+}
+
+LRUCache.prototype.forEach = function (fn, thisp) {
+  thisp = thisp || this
+  for (var walker = this[LRU_LIST].head; walker !== null;) {
+    var next = walker.next
+    forEachStep(this, fn, walker, thisp)
+    walker = next
+  }
+}
+
+LRUCache.prototype.keys = function () {
+  return this[LRU_LIST].toArray().map(function (k) {
+    return k.key
+  }, this)
+}
+
+LRUCache.prototype.values = function () {
+  return this[LRU_LIST].toArray().map(function (k) {
+    return k.value
+  }, this)
+}
+
+LRUCache.prototype.reset = function () {
+  if (this[DISPOSE] &&
+      this[LRU_LIST] &&
+      this[LRU_LIST].length) {
+    this[LRU_LIST].forEach(function (hit) {
+      this[DISPOSE](hit.key, hit.value)
+    }, this)
+  }
+
+  this[CACHE] = new Map() // hash of items by key
+  this[LRU_LIST] = new Yallist() // list of items in order of use recency
+  this[LENGTH] = 0 // length of items in the list
+}
+
+LRUCache.prototype.dump = function () {
+  return this[LRU_LIST].map(function (hit) {
+    if (!isStale(this, hit)) {
+      return {
+        k: hit.key,
+        v: hit.value,
+        e: hit.now + (hit.maxAge || 0)
+      }
+    }
+  }, this).toArray().filter(function (h) {
+    return h
+  })
+}
+
+LRUCache.prototype.dumpLru = function () {
+  return this[LRU_LIST]
+}
+
+LRUCache.prototype.inspect = function (n, opts) {
+  var str = 'LRUCache {'
+  var extras = false
+
+  var as = this[ALLOW_STALE]
+  if (as) {
+    str += '\n  allowStale: true'
+    extras = true
+  }
+
+  var max = this[MAX]
+  if (max && max !== Infinity) {
+    if (extras) {
+      str += ','
+    }
+    str += '\n  max: ' + util.inspect(max, opts)
+    extras = true
+  }
+
+  var maxAge = this[MAX_AGE]
+  if (maxAge) {
+    if (extras) {
+      str += ','
+    }
+    str += '\n  maxAge: ' + util.inspect(maxAge, opts)
+    extras = true
+  }
+
+  var lc = this[LENGTH_CALCULATOR]
+  if (lc && lc !== naiveLength) {
+    if (extras) {
+      str += ','
+    }
+    str += '\n  length: ' + util.inspect(this[LENGTH], opts)
+    extras = true
+  }
+
+  var didFirst = false
+  this[LRU_LIST].forEach(function (item) {
+    if (didFirst) {
+      str += ',\n  '
+    } else {
+      if (extras) {
+        str += ',\n'
+      }
+      didFirst = true
+      str += '\n  '
+    }
+    var key = util.inspect(item.key).split('\n').join('\n  ')
+    var val = { value: item.value }
+    if (item.maxAge !== maxAge) {
+      val.maxAge = item.maxAge
+    }
+    if (lc !== naiveLength) {
+      val.length = item.length
+    }
+    if (isStale(this, item)) {
+      val.stale = true
+    }
+
+    val = util.inspect(val, opts).split('\n').join('\n  ')
+    str += key + ' => ' + val
+  })
+
+  if (didFirst || extras) {
+    str += '\n'
+  }
+  str += '}'
+
+  return str
+}
+
+LRUCache.prototype.set = function (key, value, maxAge) {
+  maxAge = maxAge || this[MAX_AGE]
+
+  var now = maxAge ? Date.now() : 0
+  var len = this[LENGTH_CALCULATOR](value, key)
+
+  if (this[CACHE].has(key)) {
+    if (len > this[MAX]) {
+      del(this, this[CACHE].get(key))
+      return false
+    }
+
+    var node = this[CACHE].get(key)
+    var item = node.value
+
+    // dispose of the old one before overwriting
+    // split out into 2 ifs for better coverage tracking
+    if (this[DISPOSE]) {
+      if (!this[NO_DISPOSE_ON_SET]) {
+        this[DISPOSE](key, item.value)
+      }
+    }
+
+    item.now = now
+    item.maxAge = maxAge
+    item.value = value
+    this[LENGTH] += len - item.length
+    item.length = len
+    this.get(key)
+    trim(this)
+    return true
+  }
+
+  var hit = new Entry(key, value, len, now, maxAge)
+
+  // oversized objects fall out of cache automatically.
+  if (hit.length > this[MAX]) {
+    if (this[DISPOSE]) {
+      this[DISPOSE](key, value)
+    }
+    return false
+  }
+
+  this[LENGTH] += hit.length
+  this[LRU_LIST].unshift(hit)
+  this[CACHE].set(key, this[LRU_LIST].head)
+  trim(this)
+  return true
+}
+
+LRUCache.prototype.has = function (key) {
+  if (!this[CACHE].has(key)) return false
+  var hit = this[CACHE].get(key).value
+  if (isStale(this, hit)) {
+    return false
+  }
+  return true
+}
+
+LRUCache.prototype.get = function (key) {
+  return get(this, key, true)
+}
+
+LRUCache.prototype.peek = function (key) {
+  return get(this, key, false)
+}
+
+LRUCache.prototype.pop = function () {
+  var node = this[LRU_LIST].tail
+  if (!node) return null
+  del(this, node)
+  return node.value
+}
+
+LRUCache.prototype.del = function (key) {
+  del(this, this[CACHE].get(key))
+}
+
+LRUCache.prototype.load = function (arr) {
+  // reset the cache
+  this.reset()
+
+  var now = Date.now()
+  // A previous serialized cache has the most recent items first
+  for (var l = arr.length - 1; l >= 0; l--) {
+    var hit = arr[l]
+    var expiresAt = hit.e || 0
+    if (expiresAt === 0) {
+      // the item was created without expiration in a non aged cache
+      this.set(hit.k, hit.v)
+    } else {
+      var maxAge = expiresAt - now
+      // dont add already expired items
+      if (maxAge > 0) {
+        this.set(hit.k, hit.v, maxAge)
+      }
+    }
+  }
+}
+
+LRUCache.prototype.prune = function () {
+  var self = this
+  this[CACHE].forEach(function (value, key) {
+    get(self, key, false)
+  })
+}
+
+function get (self, key, doUse) {
+  var node = self[CACHE].get(key)
+  if (node) {
+    var hit = node.value
+    if (isStale(self, hit)) {
+      del(self, node)
+      if (!self[ALLOW_STALE]) hit = undefined
+    } else {
+      if (doUse) {
+        self[LRU_LIST].unshiftNode(node)
+      }
+    }
+    if (hit) hit = hit.value
+  }
+  return hit
+}
+
+function isStale (self, hit) {
+  if (!hit || (!hit.maxAge && !self[MAX_AGE])) {
+    return false
+  }
+  var stale = false
+  var diff = Date.now() - hit.now
+  if (hit.maxAge) {
+    stale = diff > hit.maxAge
+  } else {
+    stale = self[MAX_AGE] && (diff > self[MAX_AGE])
+  }
+  return stale
+}
+
+function trim (self) {
+  if (self[LENGTH] > self[MAX]) {
+    for (var walker = self[LRU_LIST].tail;
+         self[LENGTH] > self[MAX] && walker !== null;) {
+      // We know that we're about to delete this one, and also
+      // what the next least recently used key will be, so just
+      // go ahead and set it now.
+      var prev = walker.prev
+      del(self, walker)
+      walker = prev
+    }
+  }
+}
+
+function del (self, node) {
+  if (node) {
+    var hit = node.value
+    if (self[DISPOSE]) {
+      self[DISPOSE](hit.key, hit.value)
+    }
+    self[LENGTH] -= hit.length
+    self[CACHE].delete(hit.key)
+    self[LRU_LIST].removeNode(node)
+  }
+}
+
+// classy, since V8 prefers predictable objects.
+function Entry (key, value, length, now, maxAge) {
+  this.key = key
+  this.value = value
+  this.length = length
+  this.now = now
+  this.maxAge = maxAge || 0
+}

node_modules/lru-cache/node_modules/yallist/LICENSE

@@ -0,0 +1,15 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

node_modules/lru-cache/node_modules/yallist/iterator.js

@@ -0,0 +1,7 @@
+var Yallist = require('./yallist.js')
+
+Yallist.prototype[Symbol.iterator] = function* () {
+  for (let walker = this.head; walker; walker = walker.next) {
+    yield walker.value
+  }
+}

node_modules/lru-cache/node_modules/yallist/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "yallist",
+  "version": "2.1.2",
+  "description": "Yet Another Linked List",
+  "main": "yallist.js",
+  "directories": {
+    "test": "test"
+  },
+  "files": [
+    "yallist.js",
+    "iterator.js"
+  ],
+  "dependencies": {},
+  "devDependencies": {
+    "tap": "^10.3.0"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/isaacs/yallist.git"
+  },
+  "author": "Isaac Z. Schlueter <i@izs.me> (http://blog.izs.me/)",
+  "license": "ISC"
+}

node_modules/lru-cache/node_modules/yallist/yallist.js

@@ -0,0 +1,370 @@
+module.exports = Yallist
+
+Yallist.Node = Node
+Yallist.create = Yallist
+
+function Yallist (list) {
+  var self = this
+  if (!(self instanceof Yallist)) {
+    self = new Yallist()
+  }
+
+  self.tail = null
+  self.head = null
+  self.length = 0
+
+  if (list && typeof list.forEach === 'function') {
+    list.forEach(function (item) {
+      self.push(item)
+    })
+  } else if (arguments.length > 0) {
+    for (var i = 0, l = arguments.length; i < l; i++) {
+      self.push(arguments[i])
+    }
+  }
+
+  return self
+}
+
+Yallist.prototype.removeNode = function (node) {
+  if (node.list !== this) {
+    throw new Error('removing node which does not belong to this list')
+  }
+
+  var next = node.next
+  var prev = node.prev
+
+  if (next) {
+    next.prev = prev
+  }
+
+  if (prev) {
+    prev.next = next
+  }
+
+  if (node === this.head) {
+    this.head = next
+  }
+  if (node === this.tail) {
+    this.tail = prev
+  }
+
+  node.list.length--
+  node.next = null
+  node.prev = null
+  node.list = null
+}
+
+Yallist.prototype.unshiftNode = function (node) {
+  if (node === this.head) {
+    return
+  }
+
+  if (node.list) {
+    node.list.removeNode(node)
+  }
+
+  var head = this.head
+  node.list = this
+  node.next = head
+  if (head) {
+    head.prev = node
+  }
+
+  this.head = node
+  if (!this.tail) {
+    this.tail = node
+  }
+  this.length++
+}
+
+Yallist.prototype.pushNode = function (node) {
+  if (node === this.tail) {
+    return
+  }
+
+  if (node.list) {
+    node.list.removeNode(node)
+  }
+
+  var tail = this.tail
+  node.list = this
+  node.prev = tail
+  if (tail) {
+    tail.next = node
+  }
+
+  this.tail = node
+  if (!this.head) {
+    this.head = node
+  }
+  this.length++
+}
+
+Yallist.prototype.push = function () {
+  for (var i = 0, l = arguments.length; i < l; i++) {
+    push(this, arguments[i])
+  }
+  return this.length
+}
+
+Yallist.prototype.unshift = function () {
+  for (var i = 0, l = arguments.length; i < l; i++) {
+    unshift(this, arguments[i])
+  }
+  return this.length
+}
+
+Yallist.prototype.pop = function () {
+  if (!this.tail) {
+    return undefined
+  }
+
+  var res = this.tail.value
+  this.tail = this.tail.prev
+  if (this.tail) {
+    this.tail.next = null
+  } else {
+    this.head = null
+  }
+  this.length--
+  return res
+}
+
+Yallist.prototype.shift = function () {
+  if (!this.head) {
+    return undefined
+  }
+
+  var res = this.head.value
+  this.head = this.head.next
+  if (this.head) {
+    this.head.prev = null
+  } else {
+    this.tail = null
+  }
+  this.length--
+  return res
+}
+
+Yallist.prototype.forEach = function (fn, thisp) {
+  thisp = thisp || this
+  for (var walker = this.head, i = 0; walker !== null; i++) {
+    fn.call(thisp, walker.value, i, this)
+    walker = walker.next
+  }
+}
+
+Yallist.prototype.forEachReverse = function (fn, thisp) {
+  thisp = thisp || this
+  for (var walker = this.tail, i = this.length - 1; walker !== null; i--) {
+    fn.call(thisp, walker.value, i, this)
+    walker = walker.prev
+  }
+}
+
+Yallist.prototype.get = function (n) {
+  for (var i = 0, walker = this.head; walker !== null && i < n; i++) {
+    // abort out of the list early if we hit a cycle
+    walker = walker.next
+  }
+  if (i === n && walker !== null) {
+    return walker.value
+  }
+}
+
+Yallist.prototype.getReverse = function (n) {
+  for (var i = 0, walker = this.tail; walker !== null && i < n; i++) {
+    // abort out of the list early if we hit a cycle
+    walker = walker.prev
+  }
+  if (i === n && walker !== null) {
+    return walker.value
+  }
+}
+
+Yallist.prototype.map = function (fn, thisp) {
+  thisp = thisp || this
+  var res = new Yallist()
+  for (var walker = this.head; walker !== null;) {
+    res.push(fn.call(thisp, walker.value, this))
+    walker = walker.next
+  }
+  return res
+}
+
+Yallist.prototype.mapReverse = function (fn, thisp) {
+  thisp = thisp || this
+  var res = new Yallist()
+  for (var walker = this.tail; walker !== null;) {
+    res.push(fn.call(thisp, walker.value, this))
+    walker = walker.prev
+  }
+  return res
+}
+
+Yallist.prototype.reduce = function (fn, initial) {
+  var acc
+  var walker = this.head
+  if (arguments.length > 1) {
+    acc = initial
+  } else if (this.head) {
+    walker = this.head.next
+    acc = this.head.value
+  } else {
+    throw new TypeError('Reduce of empty list with no initial value')
+  }
+
+  for (var i = 0; walker !== null; i++) {
+    acc = fn(acc, walker.value, i)
+    walker = walker.next
+  }
+
+  return acc
+}
+
+Yallist.prototype.reduceReverse = function (fn, initial) {
+  var acc
+  var walker = this.tail
+  if (arguments.length > 1) {
+    acc = initial
+  } else if (this.tail) {
+    walker = this.tail.prev
+    acc = this.tail.value
+  } else {
+    throw new TypeError('Reduce of empty list with no initial value')
+  }
+
+  for (var i = this.length - 1; walker !== null; i--) {
+    acc = fn(acc, walker.value, i)
+    walker = walker.prev
+  }
+
+  return acc
+}
+
+Yallist.prototype.toArray = function () {
+  var arr = new Array(this.length)
+  for (var i = 0, walker = this.head; walker !== null; i++) {
+    arr[i] = walker.value
+    walker = walker.next
+  }
+  return arr
+}
+
+Yallist.prototype.toArrayReverse = function () {
+  var arr = new Array(this.length)
+  for (var i = 0, walker = this.tail; walker !== null; i++) {
+    arr[i] = walker.value
+    walker = walker.prev
+  }
+  return arr
+}
+
+Yallist.prototype.slice = function (from, to) {
+  to = to || this.length
+  if (to < 0) {
+    to += this.length
+  }
+  from = from || 0
+  if (from < 0) {
+    from += this.length
+  }
+  var ret = new Yallist()
+  if (to < from || to < 0) {
+    return ret
+  }
+  if (from < 0) {
+    from = 0
+  }
+  if (to > this.length) {
+    to = this.length
+  }
+  for (var i = 0, walker = this.head; walker !== null && i < from; i++) {
+    walker = walker.next
+  }
+  for (; walker !== null && i < to; i++, walker = walker.next) {
+    ret.push(walker.value)
+  }
+  return ret
+}
+
+Yallist.prototype.sliceReverse = function (from, to) {
+  to = to || this.length
+  if (to < 0) {
+    to += this.length
+  }
+  from = from || 0
+  if (from < 0) {
+    from += this.length
+  }
+  var ret = new Yallist()
+  if (to < from || to < 0) {
+    return ret
+  }
+  if (from < 0) {
+    from = 0
+  }
+  if (to > this.length) {
+    to = this.length
+  }
+  for (var i = this.length, walker = this.tail; walker !== null && i > to; i--) {
+    walker = walker.prev
+  }
+  for (; walker !== null && i > from; i--, walker = walker.prev) {
+    ret.push(walker.value)
+  }
+  return ret
+}
+
+Yallist.prototype.reverse = function () {
+  var head = this.head
+  var tail = this.tail
+  for (var walker = head; walker !== null; walker = walker.prev) {
+    var p = walker.prev
+    walker.prev = walker.next
+    walker.next = p
+  }
+  this.head = tail
+  this.tail = head
+  return this
+}
+
+function push (self, item) {
+  self.tail = new Node(item, self.tail, null, self)
+  if (!self.head) {
+    self.head = self.tail
+  }
+  self.length++
+}
+
+function unshift (self, item) {
+  self.head = new Node(item, null, self.head, self)
+  if (!self.tail) {
+    self.tail = self.head
+  }
+  self.length++
+}
+
+function Node (value, prev, next, list) {
+  if (!(this instanceof Node)) {
+    return new Node(value, prev, next, list)
+  }
+
+  this.list = list
+  this.value = value
+
+  if (prev) {
+    prev.next = this
+    this.prev = prev
+  } else {
+    this.prev = null
+  }
+
+  if (next) {
+    next.prev = this
+    this.next = next
+  } else {
+    this.next = null
+  }
+}

node_modules/lru-cache/package.json

@@ -0,0 +1,21 @@
+{
+  "name": "lru-cache",
+  "description": "A cache object that deletes the least-recently-used items.",
+  "version": "4.1.3",
+  "author": "Isaac Z. Schlueter <i@izs.me>",
+  "main": "index.js",
+  "repository": "git://github.com/isaacs/node-lru-cache.git",
+  "devDependencies": {
+    "benchmark": "^2.1.4",
+    "standard": "^5.4.1",
+    "tap": "^11.1.4"
+  },
+  "license": "ISC",
+  "dependencies": {
+    "pseudomap": "^1.0.2",
+    "yallist": "^2.1.2"
+  },
+  "files": [
+    "index.js"
+  ]
+}