index.js

module.exports =
/******/ (function(modules, runtime) { // webpackBootstrap
/******/ 	"use strict";
/******/ 	// The module cache
/******/ 	var installedModules = {};
/******/
/******/ 	// The require function
/******/ 	function __webpack_require__(moduleId) {
/******/
/******/ 		// Check if module is in cache
/******/ 		if(installedModules[moduleId]) {
/******/ 			return installedModules[moduleId].exports;
/******/ 		}
/******/ 		// Create a new module (and put it into the cache)
/******/ 		var module = installedModules[moduleId] = {
/******/ 			i: moduleId,
/******/ 			l: false,
/******/ 			exports: {}
/******/ 		};
/******/
/******/ 		// Execute the module function
/******/ 		var threw = true;
/******/ 		try {
/******/ 			modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
/******/ 			threw = false;
/******/ 		} finally {
/******/ 			if(threw) delete installedModules[moduleId];
/******/ 		}
/******/
/******/ 		// Flag the module as loaded
/******/ 		module.l = true;
/******/
/******/ 		// Return the exports of the module
/******/ 		return module.exports;
/******/ 	}
/******/
/******/
/******/ 	__webpack_require__.ab = __dirname + "/";
/******/
/******/ 	// the startup function
/******/ 	function startup() {
/******/ 		// Load entry module and return exports
/******/ 		return __webpack_require__(104);
/******/ 	};
/******/
/******/ 	// run startup
/******/ 	return startup();
/******/ })
/************************************************************************/
/******/ ({

/***/ 87:
/***/ (function(module) {

module.exports = require("os");

/***/ }),

/***/ 104:
/***/ (function(__unusedmodule, __unusedexports, __webpack_require__) {

const path = __webpack_require__(622)
const exec = __webpack_require__(137)
const ping = __webpack_require__(544)
// GITHUB
const core = __webpack_require__(470)

try {
  // Get input defined in action metadata file
  const pingURL = core.getInput('PING_URL')
    ? core.getInput('PING_URL')
    : '127.0.0.1'
  const fileOVPN = core.getInput('FILE_OVPN')
    ? core.getInput('FILE_OVPN')
    : './.github/vpn/config.ovpn'
  const secret = core.getInput('SECRET')
  const tlsKey = core.getInput('TLS_KEY')

  if (process.env.CA_CRT == null) {
    core.setFailed(`Can't get ca cert please add CA_CRT in secret`)
    process.exit(1)
  }

  if (process.env.USER_CRT == null) {
    core.setFailed(`Can't get user cert please add USER_CRT in secret`)
    process.exit(1)
  }

  if (process.env.USER_KEY == null) {
    core.setFailed(`Can't get user key please add USER_KEY in secret`)
    process.exit(1)
  }

  const finalPath = path.resolve(process.cwd(), fileOVPN)

  const createFile = (filename, data) => {
    if (exec('echo ' + data + ' |base64 -d >> ' + filename).code !== 0) {
      core.setFailed(`Can't create file ${filename}`)
      process.exit(1)
    } else {
      if (exec('sudo chmod 600 ' + filename).code !== 0) {
        core.setFailed(`Can't set permission file ${filename}`)
        process.exit(1)
      }
    }
  }

  if (secret !== '') {
    createFile('secret.txt', secret)
  }
  if (tlsKey !== '') {
    createFile('tls.key', tlsKey)
  }

  createFile('ca.crt', process.env.CA_CRT)
  createFile('user.crt', process.env.USER_CRT)
  createFile('user.key', process.env.USER_KEY)

  if (exec(`sudo openvpn --config ${finalPath} --daemon`).code !== 0) {
    core.setFailed(`Can't setup config ${finalPath}`)
    process.exit(1)
  }

  ping.promise
    .probe(pingURL, {
      timeout: 15,
      min_reply: 15,
    })
    .then(function (res) {
      if (res.alive) {
        core.info('Connect vpn passed')
        core.setOutput('STATUS', true)
      } else {
        core.setFailed('Connect vpn failed')
        core.setOutput('STATUS', false)
      }
    })
} catch (error) {
  core.setFailed(error.message)
}


/***/ }),

/***/ 129:
/***/ (function(module) {

module.exports = require("child_process");

/***/ }),

/***/ 137:
/***/ (function(module, __unusedexports, __webpack_require__) {

"use strict";


var cp = __webpack_require__(129)
var normaliseOptions = __webpack_require__(877)

function shelljsExec(command, options) {

  options = normaliseOptions(options)

  var error, stdout, stderr, code, ok

  try {
    error = null
    stdout = cp.execSync(command, options)
    stderr = ''
    code = 0
    ok = true
  } catch (e) {
    error = e
    stdout = e.stdout
    stderr = e.stderr
    code = e.status || /* istanbul ignore next */ 1
    ok = false
  }

  return {
    error: error,
    stdout: stdout,
    stderr: stderr,
    code: code,
    ok: ok
  }
}

module.exports = shelljsExec


/***/ }),

/***/ 216:
/***/ (function(module) {

// vim:ts=4:sts=4:sw=4:
/*!
 *
 * Copyright 2009-2017 Kris Kowal under the terms of the MIT
 * license found at https://github.com/kriskowal/q/blob/v1/LICENSE
 *
 * With parts by Tyler Close
 * Copyright 2007-2009 Tyler Close under the terms of the MIT X license found
 * at http://www.opensource.org/licenses/mit-license.html
 * Forked at ref_send.js version: 2009-05-11
 *
 * With parts by Mark Miller
 * Copyright (C) 2011 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

(function (definition) {
    "use strict";

    // This file will function properly as a <script> tag, or a module
    // using CommonJS and NodeJS or RequireJS module formats.  In
    // Common/Node/RequireJS, the module exports the Q API and when
    // executed as a simple <script>, it creates a Q global instead.

    // Montage Require
    if (typeof bootstrap === "function") {
        bootstrap("promise", definition);

    // CommonJS
    } else if (true) {
        module.exports = definition();

    // RequireJS
    } else { var previousQ, global; }

})(function () {
"use strict";

var hasStacks = false;
try {
    throw new Error();
} catch (e) {
    hasStacks = !!e.stack;
}

// All code after this point will be filtered from stack traces reported
// by Q.
var qStartingLine = captureLine();
var qFileName;

// shims

// used for fallback in "allResolved"
var noop = function () {};

// Use the fastest possible means to execute a task in a future turn
// of the event loop.
var nextTick =(function () {
    // linked list of tasks (single, with head node)
    var head = {task: void 0, next: null};
    var tail = head;
    var flushing = false;
    var requestTick = void 0;
    var isNodeJS = false;
    // queue for late tasks, used by unhandled rejection tracking
    var laterQueue = [];

    function flush() {
        /* jshint loopfunc: true */
        var task, domain;

        while (head.next) {
            head = head.next;
            task = head.task;
            head.task = void 0;
            domain = head.domain;

            if (domain) {
                head.domain = void 0;
                domain.enter();
            }
            runSingle(task, domain);

        }
        while (laterQueue.length) {
            task = laterQueue.pop();
            runSingle(task);
        }
        flushing = false;
    }
    // runs a single function in the async queue
    function runSingle(task, domain) {
        try {
            task();

        } catch (e) {
            if (isNodeJS) {
                // In node, uncaught exceptions are considered fatal errors.
                // Re-throw them synchronously to interrupt flushing!

                // Ensure continuation if the uncaught exception is suppressed
                // listening "uncaughtException" events (as domains does).
                // Continue in next event to avoid tick recursion.
                if (domain) {
                    domain.exit();
                }
                setTimeout(flush, 0);
                if (domain) {
                    domain.enter();
                }

                throw e;

            } else {
                // In browsers, uncaught exceptions are not fatal.
                // Re-throw them asynchronously to avoid slow-downs.
                setTimeout(function () {
                    throw e;
                }, 0);
            }
        }

        if (domain) {
            domain.exit();
        }
    }

    nextTick = function (task) {
        tail = tail.next = {
            task: task,
            domain: isNodeJS && process.domain,
            next: null
        };

        if (!flushing) {
            flushing = true;
            requestTick();
        }
    };

    if (typeof process === "object" &&
        process.toString() === "[object process]" && process.nextTick) {
        // Ensure Q is in a real Node environment, with a `process.nextTick`.
        // To see through fake Node environments:
        // * Mocha test runner - exposes a `process` global without a `nextTick`
        // * Browserify - exposes a `process.nexTick` function that uses
        //   `setTimeout`. In this case `setImmediate` is preferred because
        //    it is faster. Browserify's `process.toString()` yields
        //   "[object Object]", while in a real Node environment
        //   `process.toString()` yields "[object process]".
        isNodeJS = true;

        requestTick = function () {
            process.nextTick(flush);
        };

    } else if (typeof setImmediate === "function") {
        // In IE10, Node.js 0.9+, or https://github.com/NobleJS/setImmediate
        if (typeof window !== "undefined") {
            requestTick = setImmediate.bind(window, flush);
        } else {
            requestTick = function () {
                setImmediate(flush);
            };
        }

    } else if (typeof MessageChannel !== "undefined") {
        // modern browsers
        // http://www.nonblocking.io/2011/06/windownexttick.html
        var channel = new MessageChannel();
        // At least Safari Version 6.0.5 (8536.30.1) intermittently cannot create
        // working message ports the first time a page loads.
        channel.port1.onmessage = function () {
            requestTick = requestPortTick;
            channel.port1.onmessage = flush;
            flush();
        };
        var requestPortTick = function () {
            // Opera requires us to provide a message payload, regardless of
            // whether we use it.
            channel.port2.postMessage(0);
        };
        requestTick = function () {
            setTimeout(flush, 0);
            requestPortTick();
        };

    } else {
        // old browsers
        requestTick = function () {
            setTimeout(flush, 0);
        };
    }
    // runs a task after all other tasks have been run
    // this is useful for unhandled rejection tracking that needs to happen
    // after all `then`d tasks have been run.
    nextTick.runAfter = function (task) {
        laterQueue.push(task);
        if (!flushing) {
            flushing = true;
            requestTick();
        }
    };
    return nextTick;
})();

// Attempt to make generics safe in the face of downstream
// modifications.
// There is no situation where this is necessary.
// If you need a security guarantee, these primordials need to be
// deeply frozen anyway, and if you don’t need a security guarantee,
// this is just plain paranoid.
// However, this **might** have the nice side-effect of reducing the size of
// the minified code by reducing x.call() to merely x()
// See Mark Miller’s explanation of what this does.
// http://wiki.ecmascript.org/doku.php?id=conventions:safe_meta_programming
var call = Function.call;
function uncurryThis(f) {
    return function () {
        return call.apply(f, arguments);
    };
}
// This is equivalent, but slower:
// uncurryThis = Function_bind.bind(Function_bind.call);
// http://jsperf.com/uncurrythis

var array_slice = uncurryThis(Array.prototype.slice);

var array_reduce = uncurryThis(
    Array.prototype.reduce || function (callback, basis) {
        var index = 0,
            length = this.length;
        // concerning the initial value, if one is not provided
        if (arguments.length === 1) {
            // seek to the first value in the array, accounting
            // for the possibility that is is a sparse array
            do {
                if (index in this) {
                    basis = this[index++];
                    break;
                }
                if (++index >= length) {
                    throw new TypeError();
                }
            } while (1);
        }
        // reduce
        for (; index < length; index++) {
            // account for the possibility that the array is sparse
            if (index in this) {
                basis = callback(basis, this[index], index);
            }
        }
        return basis;
    }
);

var array_indexOf = uncurryThis(
    Array.prototype.indexOf || function (value) {
        // not a very good shim, but good enough for our one use of it
        for (var i = 0; i < this.length; i++) {
            if (this[i] === value) {
                return i;
            }
        }
        return -1;
    }
);

var array_map = uncurryThis(
    Array.prototype.map || function (callback, thisp) {
        var self = this;
        var collect = [];
        array_reduce(self, function (undefined, value, index) {
            collect.push(callback.call(thisp, value, index, self));
        }, void 0);
        return collect;
    }
);

var object_create = Object.create || function (prototype) {
    function Type() { }
    Type.prototype = prototype;
    return new Type();
};

var object_defineProperty = Object.defineProperty || function (obj, prop, descriptor) {
    obj[prop] = descriptor.value;
    return obj;
};

var object_hasOwnProperty = uncurryThis(Object.prototype.hasOwnProperty);

var object_keys = Object.keys || function (object) {
    var keys = [];
    for (var key in object) {
        if (object_hasOwnProperty(object, key)) {
            keys.push(key);
        }
    }
    return keys;
};

var object_toString = uncurryThis(Object.prototype.toString);

function isObject(value) {
    return value === Object(value);
}

// generator related shims

// FIXME: Remove this function once ES6 generators are in SpiderMonkey.
function isStopIteration(exception) {
    return (
        object_toString(exception) === "[object StopIteration]" ||
        exception instanceof QReturnValue
    );
}

// FIXME: Remove this helper and Q.return once ES6 generators are in
// SpiderMonkey.
var QReturnValue;
if (typeof ReturnValue !== "undefined") {
    QReturnValue = ReturnValue;
} else {
    QReturnValue = function (value) {
        this.value = value;
    };
}

// long stack traces

var STACK_JUMP_SEPARATOR = "From previous event:";

function makeStackTraceLong(error, promise) {
    // If possible, transform the error stack trace by removing Node and Q
    // cruft, then concatenating with the stack trace of `promise`. See #57.
    if (hasStacks &&
        promise.stack &&
        typeof error === "object" &&
        error !== null &&
        error.stack
    ) {
        var stacks = [];
        for (var p = promise; !!p; p = p.source) {
            if (p.stack && (!error.__minimumStackCounter__ || error.__minimumStackCounter__ > p.stackCounter)) {
                object_defineProperty(error, "__minimumStackCounter__", {value: p.stackCounter, configurable: true});
                stacks.unshift(p.stack);
            }
        }
        stacks.unshift(error.stack);

        var concatedStacks = stacks.join("\n" + STACK_JUMP_SEPARATOR + "\n");
        var stack = filterStackString(concatedStacks);
        object_defineProperty(error, "stack", {value: stack, configurable: true});
    }
}

function filterStackString(stackString) {
    var lines = stackString.split("\n");
    var desiredLines = [];
    for (var i = 0; i < lines.length; ++i) {
        var line = lines[i];

        if (!isInternalFrame(line) && !isNodeFrame(line) && line) {
            desiredLines.push(line);
        }
    }
    return desiredLines.join("\n");
}

function isNodeFrame(stackLine) {
    return stackLine.indexOf("(module.js:") !== -1 ||
           stackLine.indexOf("(node.js:") !== -1;
}

function getFileNameAndLineNumber(stackLine) {
    // Named functions: "at functionName (filename:lineNumber:columnNumber)"
    // In IE10 function name can have spaces ("Anonymous function") O_o
    var attempt1 = /at .+ \((.+):(\d+):(?:\d+)\)$/.exec(stackLine);
    if (attempt1) {
        return [attempt1[1], Number(attempt1[2])];
    }

    // Anonymous functions: "at filename:lineNumber:columnNumber"
    var attempt2 = /at ([^ ]+):(\d+):(?:\d+)$/.exec(stackLine);
    if (attempt2) {
        return [attempt2[1], Number(attempt2[2])];
    }

    // Firefox style: "function@filename:lineNumber or @filename:lineNumber"
    var attempt3 = /.*@(.+):(\d+)$/.exec(stackLine);
    if (attempt3) {
        return [attempt3[1], Number(attempt3[2])];
    }
}

function isInternalFrame(stackLine) {
    var fileNameAndLineNumber = getFileNameAndLineNumber(stackLine);

    if (!fileNameAndLineNumber) {
        return false;
    }

    var fileName = fileNameAndLineNumber[0];
    var lineNumber = fileNameAndLineNumber[1];

    return fileName === qFileName &&
        lineNumber >= qStartingLine &&
        lineNumber <= qEndingLine;
}

// discover own file name and line number range for filtering stack
// traces
function captureLine() {
    if (!hasStacks) {
        return;
    }

    try {
        throw new Error();
    } catch (e) {
        var lines = e.stack.split("\n");
        var firstLine = lines[0].indexOf("@") > 0 ? lines[1] : lines[2];
        var fileNameAndLineNumber = getFileNameAndLineNumber(firstLine);
        if (!fileNameAndLineNumber) {
            return;
        }

        qFileName = fileNameAndLineNumber[0];
        return fileNameAndLineNumber[1];
    }
}

function deprecate(callback, name, alternative) {
    return function () {
        if (typeof console !== "undefined" &&
            typeof console.warn === "function") {
            console.warn(name + " is deprecated, use " + alternative +
                         " instead.", new Error("").stack);
        }
        return callback.apply(callback, arguments);
    };
}

// end of shims
// beginning of real work

/**
 * Constructs a promise for an immediate reference, passes promises through, or
 * coerces promises from different systems.
 * @param value immediate reference or promise
 */
function Q(value) {
    // If the object is already a Promise, return it directly.  This enables
    // the resolve function to both be used to created references from objects,
    // but to tolerably coerce non-promises to promises.
    if (value instanceof Promise) {
        return value;
    }

    // assimilate thenables
    if (isPromiseAlike(value)) {
        return coerce(value);
    } else {
        return fulfill(value);
    }
}
Q.resolve = Q;

/**
 * Performs a task in a future turn of the event loop.
 * @param {Function} task
 */
Q.nextTick = nextTick;

/**
 * Controls whether or not long stack traces will be on
 */
Q.longStackSupport = false;

/**
 * The counter is used to determine the stopping point for building
 * long stack traces. In makeStackTraceLong we walk backwards through
 * the linked list of promises, only stacks which were created before
 * the rejection are concatenated.
 */
var longStackCounter = 1;

// enable long stacks if Q_DEBUG is set
if (typeof process === "object" && process && process.env && process.env.Q_DEBUG) {
    Q.longStackSupport = true;
}

/**
 * Constructs a {promise, resolve, reject} object.
 *
 * `resolve` is a callback to invoke with a more resolved value for the
 * promise. To fulfill the promise, invoke `resolve` with any value that is
 * not a thenable. To reject the promise, invoke `resolve` with a rejected
 * thenable, or invoke `reject` with the reason directly. To resolve the
 * promise to another thenable, thus putting it in the same state, invoke
 * `resolve` with that other thenable.
 */
Q.defer = defer;
function defer() {
    // if "messages" is an "Array", that indicates that the promise has not yet
    // been resolved.  If it is "undefined", it has been resolved.  Each
    // element of the messages array is itself an array of complete arguments to
    // forward to the resolved promise.  We coerce the resolution value to a
    // promise using the `resolve` function because it handles both fully
    // non-thenable values and other thenables gracefully.
    var messages = [], progressListeners = [], resolvedPromise;

    var deferred = object_create(defer.prototype);
    var promise = object_create(Promise.prototype);

    promise.promiseDispatch = function (resolve, op, operands) {
        var args = array_slice(arguments);
        if (messages) {
            messages.push(args);
            if (op === "when" && operands[1]) { // progress operand
                progressListeners.push(operands[1]);
            }
        } else {
            Q.nextTick(function () {
                resolvedPromise.promiseDispatch.apply(resolvedPromise, args);
            });
        }
    };

    // XXX deprecated
    promise.valueOf = function () {
        if (messages) {
            return promise;
        }
        var nearerValue = nearer(resolvedPromise);
        if (isPromise(nearerValue)) {
            resolvedPromise = nearerValue; // shorten chain
        }
        return nearerValue;
    };

    promise.inspect = function () {
        if (!resolvedPromise) {
            return { state: "pending" };
        }
        return resolvedPromise.inspect();
    };

    if (Q.longStackSupport && hasStacks) {
        try {
            throw new Error();
        } catch (e) {
            // NOTE: don't try to use `Error.captureStackTrace` or transfer the
            // accessor around; that causes memory leaks as per GH-111. Just
            // reify the stack trace as a string ASAP.
            //
            // At the same time, cut off the first line; it's always just
            // "[object Promise]\n", as per the `toString`.
            promise.stack = e.stack.substring(e.stack.indexOf("\n") + 1);
            promise.stackCounter = longStackCounter++;
        }
    }

    // NOTE: we do the checks for `resolvedPromise` in each method, instead of
    // consolidating them into `become`, since otherwise we'd create new
    // promises with the lines `become(whatever(value))`. See e.g. GH-252.

    function become(newPromise) {
        resolvedPromise = newPromise;

        if (Q.longStackSupport && hasStacks) {
            // Only hold a reference to the new promise if long stacks
            // are enabled to reduce memory usage
            promise.source = newPromise;
        }

        array_reduce(messages, function (undefined, message) {
            Q.nextTick(function () {
                newPromise.promiseDispatch.apply(newPromise, message);
            });
        }, void 0);

        messages = void 0;
        progressListeners = void 0;
    }

    deferred.promise = promise;
    deferred.resolve = function (value) {
        if (resolvedPromise) {
            return;
        }

        become(Q(value));
    };

    deferred.fulfill = function (value) {
        if (resolvedPromise) {
            return;
        }

        become(fulfill(value));
    };
    deferred.reject = function (reason) {
        if (resolvedPromise) {
            return;
        }

        become(reject(reason));
    };
    deferred.notify = function (progress) {
        if (resolvedPromise) {
            return;
        }

        array_reduce(progressListeners, function (undefined, progressListener) {
            Q.nextTick(function () {
                progressListener(progress);
            });
        }, void 0);
    };

    return deferred;
}

/**
 * Creates a Node-style callback that will resolve or reject the deferred
 * promise.
 * @returns a nodeback
 */
defer.prototype.makeNodeResolver = function () {
    var self = this;
    return function (error, value) {
        if (error) {
            self.reject(error);
        } else if (arguments.length > 2) {
            self.resolve(array_slice(arguments, 1));
        } else {
            self.resolve(value);
        }
    };
};

/**
 * @param resolver {Function} a function that returns nothing and accepts
 * the resolve, reject, and notify functions for a deferred.
 * @returns a promise that may be resolved with the given resolve and reject
 * functions, or rejected by a thrown exception in resolver
 */
Q.Promise = promise; // ES6
Q.promise = promise;
function promise(resolver) {
    if (typeof resolver !== "function") {
        throw new TypeError("resolver must be a function.");
    }
    var deferred = defer();
    try {
        resolver(deferred.resolve, deferred.reject, deferred.notify);
    } catch (reason) {
        deferred.reject(reason);
    }
    return deferred.promise;
}

promise.race = race; // ES6
promise.all = all; // ES6
promise.reject = reject; // ES6
promise.resolve = Q; // ES6

// XXX experimental.  This method is a way to denote that a local value is
// serializable and should be immediately dispatched to a remote upon request,
// instead of passing a reference.
Q.passByCopy = function (object) {
    //freeze(object);
    //passByCopies.set(object, true);
    return object;
};

Promise.prototype.passByCopy = function () {
    //freeze(object);
    //passByCopies.set(object, true);
    return this;
};

/**
 * If two promises eventually fulfill to the same value, promises that value,
 * but otherwise rejects.
 * @param x {Any*}
 * @param y {Any*}
 * @returns {Any*} a promise for x and y if they are the same, but a rejection
 * otherwise.
 *
 */
Q.join = function (x, y) {
    return Q(x).join(y);
};

Promise.prototype.join = function (that) {
    return Q([this, that]).spread(function (x, y) {
        if (x === y) {
            // TODO: "===" should be Object.is or equiv
            return x;
        } else {
            throw new Error("Q can't join: not the same: " + x + " " + y);
        }
    });
};

/**
 * Returns a promise for the first of an array of promises to become settled.
 * @param answers {Array[Any*]} promises to race
 * @returns {Any*} the first promise to be settled
 */
Q.race = race;
function race(answerPs) {
    return promise(function (resolve, reject) {
        // Switch to this once we can assume at least ES5
        // answerPs.forEach(function (answerP) {
        //     Q(answerP).then(resolve, reject);
        // });
        // Use this in the meantime
        for (var i = 0, len = answerPs.length; i < len; i++) {
            Q(answerPs[i]).then(resolve, reject);
        }
    });
}

Promise.prototype.race = function () {
    return this.then(Q.race);
};

/**
 * Constructs a Promise with a promise descriptor object and optional fallback
 * function.  The descriptor contains methods like when(rejected), get(name),
 * set(name, value), post(name, args), and delete(name), which all
 * return either a value, a promise for a value, or a rejection.  The fallback
 * accepts the operation name, a resolver, and any further arguments that would
 * have been forwarded to the appropriate method above had a method been
 * provided with the proper name.  The API makes no guarantees about the nature
 * of the returned object, apart from that it is usable whereever promises are
 * bought and sold.
 */
Q.makePromise = Promise;
function Promise(descriptor, fallback, inspect) {
    if (fallback === void 0) {
        fallback = function (op) {
            return reject(new Error(
                "Promise does not support operation: " + op
            ));
        };
    }
    if (inspect === void 0) {
        inspect = function () {
            return {state: "unknown"};
        };
    }

    var promise = object_create(Promise.prototype);

    promise.promiseDispatch = function (resolve, op, args) {
        var result;
        try {
            if (descriptor[op]) {
                result = descriptor[op].apply(promise, args);
            } else {
                result = fallback.call(promise, op, args);
            }
        } catch (exception) {
            result = reject(exception);
        }
        if (resolve) {
            resolve(result);
        }
    };

    promise.inspect = inspect;

    // XXX deprecated `valueOf` and `exception` support
    if (inspect) {
        var inspected = inspect();
        if (inspected.state === "rejected") {
            promise.exception = inspected.reason;
        }

        promise.valueOf = function () {
            var inspected = inspect();
            if (inspected.state === "pending" ||
                inspected.state === "rejected") {
                return promise;
            }
            return inspected.value;
        };
    }

    return promise;
}

Promise.prototype.toString = function () {
    return "[object Promise]";
};

Promise.prototype.then = function (fulfilled, rejected, progressed) {
    var self = this;
    var deferred = defer();
    var done = false;   // ensure the untrusted promise makes at most a
                        // single call to one of the callbacks

    function _fulfilled(value) {
        try {
            return typeof fulfilled === "function" ? fulfilled(value) : value;
        } catch (exception) {
            return reject(exception);
        }
    }

    function _rejected(exception) {
        if (typeof rejected === "function") {
            makeStackTraceLong(exception, self);
            try {
                return rejected(exception);
            } catch (newException) {
                return reject(newException);
            }
        }
        return reject(exception);
    }

    function _progressed(value) {
        return typeof progressed === "function" ? progressed(value) : value;
    }

    Q.nextTick(function () {
        self.promiseDispatch(function (value) {
            if (done) {
                return;
            }
            done = true;

            deferred.resolve(_fulfilled(value));
        }, "when", [function (exception) {
            if (done) {
                return;
            }
            done = true;

            deferred.resolve(_rejected(exception));
        }]);
    });

    // Progress propagator need to be attached in the current tick.
    self.promiseDispatch(void 0, "when", [void 0, function (value) {
        var newValue;
        var threw = false;
        try {
            newValue = _progressed(value);
        } catch (e) {
            threw = true;
            if (Q.onerror) {
                Q.onerror(e);
            } else {
                throw e;
            }
        }

        if (!threw) {
            deferred.notify(newValue);
        }
    }]);

    return deferred.promise;
};

Q.tap = function (promise, callback) {
    return Q(promise).tap(callback);
};

/**
 * Works almost like "finally", but not called for rejections.
 * Original resolution value is passed through callback unaffected.
 * Callback may return a promise that will be awaited for.
 * @param {Function} callback
 * @returns {Q.Promise}
 * @example
 * doSomething()
 *   .then(...)
 *   .tap(console.log)
 *   .then(...);
 */
Promise.prototype.tap = function (callback) {
    callback = Q(callback);

    return this.then(function (value) {
        return callback.fcall(value).thenResolve(value);
    });
};

/**
 * Registers an observer on a promise.
 *
 * Guarantees:
 *
 * 1. that fulfilled and rejected will be called only once.
 * 2. that either the fulfilled callback or the rejected callback will be
 *    called, but not both.
 * 3. that fulfilled and rejected will not be called in this turn.
 *
 * @param value      promise or immediate reference to observe
 * @param fulfilled  function to be called with the fulfilled value
 * @param rejected   function to be called with the rejection exception
 * @param progressed function to be called on any progress notifications
 * @return promise for the return value from the invoked callback
 */
Q.when = when;
function when(value, fulfilled, rejected, progressed) {
    return Q(value).then(fulfilled, rejected, progressed);
}

Promise.prototype.thenResolve = function (value) {
    return this.then(function () { return value; });
};

Q.thenResolve = function (promise, value) {
    return Q(promise).thenResolve(value);
};

Promise.prototype.thenReject = function (reason) {
    return this.then(function () { throw reason; });
};

Q.thenReject = function (promise, reason) {
    return Q(promise).thenReject(reason);
};

/**
 * If an object is not a promise, it is as "near" as possible.
 * If a promise is rejected, it is as "near" as possible too.
 * If it’s a fulfilled promise, the fulfillment value is nearer.
 * If it’s a deferred promise and the deferred has been resolved, the
 * resolution is "nearer".
 * @param object
 * @returns most resolved (nearest) form of the object
 */

// XXX should we re-do this?
Q.nearer = nearer;
function nearer(value) {
    if (isPromise(value)) {
        var inspected = value.inspect();
        if (inspected.state === "fulfilled") {
            return inspected.value;
        }
    }
    return value;
}

/**
 * @returns whether the given object is a promise.
 * Otherwise it is a fulfilled value.
 */
Q.isPromise = isPromise;
function isPromise(object) {
    return object instanceof Promise;
}

Q.isPromiseAlike = isPromiseAlike;
function isPromiseAlike(object) {
    return isObject(object) && typeof object.then === "function";
}

/**
 * @returns whether the given object is a pending promise, meaning not
 * fulfilled or rejected.
 */
Q.isPending = isPending;
function isPending(object) {
    return isPromise(object) && object.inspect().state === "pending";
}

Promise.prototype.isPending = function () {
    return this.inspect().state === "pending";
};

/**
 * @returns whether the given object is a value or fulfilled
 * promise.
 */
Q.isFulfilled = isFulfilled;
function isFulfilled(object) {
    return !isPromise(object) || object.inspect().state === "fulfilled";
}

Promise.prototype.isFulfilled = function () {
    return this.inspect().state === "fulfilled";
};

/**
 * @returns whether the given object is a rejected promise.
 */
Q.isRejected = isRejected;
function isRejected(object) {
    return isPromise(object) && object.inspect().state === "rejected";
}

Promise.prototype.isRejected = function () {
    return this.inspect().state === "rejected";
};

//// BEGIN UNHANDLED REJECTION TRACKING

// This promise library consumes exceptions thrown in handlers so they can be
// handled by a subsequent promise.  The exceptions get added to this array when
// they are created, and removed when they are handled.  Note that in ES6 or
// shimmed environments, this would naturally be a `Set`.
var unhandledReasons = [];
var unhandledRejections = [];
var reportedUnhandledRejections = [];
var trackUnhandledRejections = true;

function resetUnhandledRejections() {
    unhandledReasons.length = 0;
    unhandledRejections.length = 0;

    if (!trackUnhandledRejections) {
        trackUnhandledRejections = true;
    }
}

function trackRejection(promise, reason) {
    if (!trackUnhandledRejections) {
        return;
    }
    if (typeof process === "object" && typeof process.emit === "function") {
        Q.nextTick.runAfter(function () {
            if (array_indexOf(unhandledRejections, promise) !== -1) {
                process.emit("unhandledRejection", reason, promise);
                reportedUnhandledRejections.push(promise);
            }
        });
    }

    unhandledRejections.push(promise);
    if (reason && typeof reason.stack !== "undefined") {
        unhandledReasons.push(reason.stack);
    } else {
        unhandledReasons.push("(no stack) " + reason);
    }
}

function untrackRejection(promise) {
    if (!trackUnhandledRejections) {
        return;
    }

    var at = array_indexOf(unhandledRejections, promise);
    if (at !== -1) {
        if (typeof process === "object" && typeof process.emit === "function") {
            Q.nextTick.runAfter(function () {
                var atReport = array_indexOf(reportedUnhandledRejections, promise);
                if (atReport !== -1) {
                    process.emit("rejectionHandled", unhandledReasons[at], promise);
                    reportedUnhandledRejections.splice(atReport, 1);
                }
            });
        }
        unhandledRejections.splice(at, 1);
        unhandledReasons.splice(at, 1);
    }
}

Q.resetUnhandledRejections = resetUnhandledRejections;

Q.getUnhandledReasons = function () {
    // Make a copy so that consumers can't interfere with our internal state.
    return unhandledReasons.slice();
};

Q.stopUnhandledRejectionTracking = function () {
    resetUnhandledRejections();
    trackUnhandledRejections = false;
};

resetUnhandledRejections();

//// END UNHANDLED REJECTION TRACKING

/**
 * Constructs a rejected promise.
 * @param reason value describing the failure
 */
Q.reject = reject;
function reject(reason) {
    var rejection = Promise({
        "when": function (rejected) {
            // note that the error has been handled
            if (rejected) {
                untrackRejection(this);
            }
            return rejected ? rejected(reason) : this;
        }
    }, function fallback() {
        return this;
    }, function inspect() {
        return { state: "rejected", reason: reason };
    });

    // Note that the reason has not been handled.
    trackRejection(rejection, reason);

    return rejection;
}

/**
 * Constructs a fulfilled promise for an immediate reference.
 * @param value immediate reference
 */
Q.fulfill = fulfill;
function fulfill(value) {
    return Promise({
        "when": function () {
            return value;
        },
        "get": function (name) {
            return value[name];
        },
        "set": function (name, rhs) {
            value[name] = rhs;
        },
        "delete": function (name) {
            delete value[name];
        },
        "post": function (name, args) {
            // Mark Miller proposes that post with no name should apply a
            // promised function.
            if (name === null || name === void 0) {
                return value.apply(void 0, args);
            } else {
                return value[name].apply(value, args);
            }
        },
        "apply": function (thisp, args) {
            return value.apply(thisp, args);
        },
        "keys": function () {
            return object_keys(value);
        }
    }, void 0, function inspect() {
        return { state: "fulfilled", value: value };
    });
}

/**
 * Converts thenables to Q promises.
 * @param promise thenable promise
 * @returns a Q promise
 */
function coerce(promise) {
    var deferred = defer();
    Q.nextTick(function () {
        try {
            promise.then(deferred.resolve, deferred.reject, deferred.notify);
        } catch (exception) {
            deferred.reject(exception);
        }
    });
    return deferred.promise;
}

/**
 * Annotates an object such that it will never be
 * transferred away from this process over any promise
 * communication channel.
 * @param object
 * @returns promise a wrapping of that object that
 * additionally responds to the "isDef" message
 * without a rejection.
 */
Q.master = master;
function master(object) {
    return Promise({
        "isDef": function () {}
    }, function fallback(op, args) {
        return dispatch(object, op, args);
    }, function () {
        return Q(object).inspect();
    });
}

/**
 * Spreads the values of a promised array of arguments into the
 * fulfillment callback.
 * @param fulfilled callback that receives variadic arguments from the
 * promised array
 * @param rejected callback that receives the exception if the promise
 * is rejected.
 * @returns a promise for the return value or thrown exception of
 * either callback.
 */
Q.spread = spread;
function spread(value, fulfilled, rejected) {
    return Q(value).spread(fulfilled, rejected);
}

Promise.prototype.spread = function (fulfilled, rejected) {
    return this.all().then(function (array) {
        return fulfilled.apply(void 0, array);
    }, rejected);
};

/**
 * The async function is a decorator for generator functions, turning
 * them into asynchronous generators.  Although generators are only part
 * of the newest ECMAScript 6 drafts, this code does not cause syntax
 * errors in older engines.  This code should continue to work and will
 * in fact improve over time as the language improves.
 *
 * ES6 generators are currently part of V8 version 3.19 with the
 * --harmony-generators runtime flag enabled.  SpiderMonkey has had them
 * for longer, but under an older Python-inspired form.  This function
 * works on both kinds of generators.
 *
 * Decorates a generator function such that:
 *  - it may yield promises
 *  - execution will continue when that promise is fulfilled
 *  - the value of the yield expression will be the fulfilled value
 *  - it returns a promise for the return value (when the generator
 *    stops iterating)
 *  - the decorated function returns a promise for the return value
 *    of the generator or the first rejected promise among those
 *    yielded.
 *  - if an error is thrown in the generator, it propagates through
 *    every following yield until it is caught, or until it escapes
 *    the generator function altogether, and is translated into a
 *    rejection for the promise returned by the decorated generator.
 */
Q.async = async;
function async(makeGenerator) {
    return function () {
        // when verb is "send", arg is a value
        // when verb is "throw", arg is an exception
        function continuer(verb, arg) {
            var result;

            // Until V8 3.19 / Chromium 29 is released, SpiderMonkey is the only
            // engine that has a deployed base of browsers that support generators.
            // However, SM's generators use the Python-inspired semantics of
            // outdated ES6 drafts.  We would like to support ES6, but we'd also
            // like to make it possible to use generators in deployed browsers, so
            // we also support Python-style generators.  At some point we can remove
            // this block.

            if (typeof StopIteration === "undefined") {
                // ES6 Generators
                try {
                    result = generator[verb](arg);
                } catch (exception) {
                    return reject(exception);
                }
                if (result.done) {
                    return Q(result.value);
                } else {
                    return when(result.value, callback, errback);
                }
            } else {
                // SpiderMonkey Generators
                // FIXME: Remove this case when SM does ES6 generators.
                try {
                    result = generator[verb](arg);
                } catch (exception) {
                    if (isStopIteration(exception)) {
                        return Q(exception.value);
                    } else {
                        return reject(exception);
                    }
                }
                return when(result, callback, errback);
            }
        }
        var generator = makeGenerator.apply(this, arguments);
        var callback = continuer.bind(continuer, "next");
        var errback = continuer.bind(continuer, "throw");
        return callback();
    };
}

/**
 * The spawn function is a small wrapper around async that immediately
 * calls the generator and also ends the promise chain, so that any
 * unhandled errors are thrown instead of forwarded to the error
 * handler. This is useful because it's extremely common to run
 * generators at the top-level to work with libraries.
 */
Q.spawn = spawn;
function spawn(makeGenerator) {
    Q.done(Q.async(makeGenerator)());
}

// FIXME: Remove this interface once ES6 generators are in SpiderMonkey.
/**
 * Throws a ReturnValue exception to stop an asynchronous generator.
 *
 * This interface is a stop-gap measure to support generator return
 * values in older Firefox/SpiderMonkey.  In browsers that support ES6
 * generators like Chromium 29, just use "return" in your generator
 * functions.
 *
 * @param value the return value for the surrounding generator
 * @throws ReturnValue exception with the value.
 * @example
 * // ES6 style
 * Q.async(function* () {
 *      var foo = yield getFooPromise();
 *      var bar = yield getBarPromise();
 *      return foo + bar;
 * })
 * // Older SpiderMonkey style
 * Q.async(function () {
 *      var foo = yield getFooPromise();
 *      var bar = yield getBarPromise();
 *      Q.return(foo + bar);
 * })
 */
Q["return"] = _return;
function _return(value) {
    throw new QReturnValue(value);
}

/**
 * The promised function decorator ensures that any promise arguments
 * are settled and passed as values (`this` is also settled and passed
 * as a value).  It will also ensure that the result of a function is
 * always a promise.
 *
 * @example
 * var add = Q.promised(function (a, b) {
 *     return a + b;
 * });
 * add(Q(a), Q(B));
 *
 * @param {function} callback The function to decorate
 * @returns {function} a function that has been decorated.
 */
Q.promised = promised;
function promised(callback) {
    return function () {
        return spread([this, all(arguments)], function (self, args) {
            return callback.apply(self, args);
        });
    };
}

/**
 * sends a message to a value in a future turn
 * @param object* the recipient
 * @param op the name of the message operation, e.g., "when",
 * @param args further arguments to be forwarded to the operation
 * @returns result {Promise} a promise for the result of the operation
 */
Q.dispatch = dispatch;
function dispatch(object, op, args) {
    return Q(object).dispatch(op, args);
}

Promise.prototype.dispatch = function (op, args) {
    var self = this;
    var deferred = defer();
    Q.nextTick(function () {
        self.promiseDispatch(deferred.resolve, op, args);
    });
    return deferred.promise;
};

/**
 * Gets the value of a property in a future turn.
 * @param object    promise or immediate reference for target object
 * @param name      name of property to get
 * @return promise for the property value
 */
Q.get = function (object, key) {
    return Q(object).dispatch("get", [key]);
};

Promise.prototype.get = function (key) {
    return this.dispatch("get", [key]);
};

/**
 * Sets the value of a property in a future turn.
 * @param object    promise or immediate reference for object object
 * @param name      name of property to set
 * @param value     new value of property
 * @return promise for the return value
 */
Q.set = function (object, key, value) {
    return Q(object).dispatch("set", [key, value]);
};

Promise.prototype.set = function (key, value) {
    return this.dispatch("set", [key, value]);
};

/**
 * Deletes a property in a future turn.
 * @param object    promise or immediate reference for target object
 * @param name      name of property to delete
 * @return promise for the return value
 */
Q.del = // XXX legacy
Q["delete"] = function (object, key) {
    return Q(object).dispatch("delete", [key]);
};

Promise.prototype.del = // XXX legacy
Promise.prototype["delete"] = function (key) {
    return this.dispatch("delete", [key]);
};

/**
 * Invokes a method in a future turn.
 * @param object    promise or immediate reference for target object
 * @param name      name of method to invoke
 * @param value     a value to post, typically an array of
 *                  invocation arguments for promises that
 *                  are ultimately backed with `resolve` values,
 *                  as opposed to those backed with URLs
 *                  wherein the posted value can be any
 *                  JSON serializable object.
 * @return promise for the return value
 */
// bound locally because it is used by other methods
Q.mapply = // XXX As proposed by "Redsandro"
Q.post = function (object, name, args) {
    return Q(object).dispatch("post", [name, args]);
};

Promise.prototype.mapply = // XXX As proposed by "Redsandro"
Promise.prototype.post = function (name, args) {
    return this.dispatch("post", [name, args]);
};

/**
 * Invokes a method in a future turn.
 * @param object    promise or immediate reference for target object
 * @param name      name of method to invoke
 * @param ...args   array of invocation arguments
 * @return promise for the return value
 */
Q.send = // XXX Mark Miller's proposed parlance
Q.mcall = // XXX As proposed by "Redsandro"
Q.invoke = function (object, name /*...args*/) {
    return Q(object).dispatch("post", [name, array_slice(arguments, 2)]);
};

Promise.prototype.send = // XXX Mark Miller's proposed parlance
Promise.prototype.mcall = // XXX As proposed by "Redsandro"
Promise.prototype.invoke = function (name /*...args*/) {
    return this.dispatch("post", [name, array_slice(arguments, 1)]);
};

/**
 * Applies the promised function in a future turn.
 * @param object    promise or immediate reference for target function
 * @param args      array of application arguments
 */
Q.fapply = function (object, args) {
    return Q(object).dispatch("apply", [void 0, args]);
};

Promise.prototype.fapply = function (args) {
    return this.dispatch("apply", [void 0, args]);
};

/**
 * Calls the promised function in a future turn.
 * @param object    promise or immediate reference for target function
 * @param ...args   array of application arguments
 */
Q["try"] =
Q.fcall = function (object /* ...args*/) {
    return Q(object).dispatch("apply", [void 0, array_slice(arguments, 1)]);
};

Promise.prototype.fcall = function (/*...args*/) {
    return this.dispatch("apply", [void 0, array_slice(arguments)]);
};

/**
 * Binds the promised function, transforming return values into a fulfilled
 * promise and thrown errors into a rejected one.
 * @param object    promise or immediate reference for target function
 * @param ...args   array of application arguments
 */
Q.fbind = function (object /*...args*/) {
    var promise = Q(object);
    var args = array_slice(arguments, 1);
    return function fbound() {
        return promise.dispatch("apply", [
            this,
            args.concat(array_slice(arguments))
        ]);
    };
};
Promise.prototype.fbind = function (/*...args*/) {
    var promise = this;
    var args = array_slice(arguments);
    return function fbound() {
        return promise.dispatch("apply", [
            this,
            args.concat(array_slice(arguments))
        ]);
    };
};

/**
 * Requests the names of the owned properties of a promised
 * object in a future turn.
 * @param object    promise or immediate reference for target object
 * @return promise for the keys of the eventually settled object
 */
Q.keys = function (object) {
    return Q(object).dispatch("keys", []);
};

Promise.prototype.keys = function () {
    return this.dispatch("keys", []);
};

/**
 * Turns an array of promises into a promise for an array.  If any of
 * the promises gets rejected, the whole array is rejected immediately.
 * @param {Array*} an array (or promise for an array) of values (or
 * promises for values)
 * @returns a promise for an array of the corresponding values
 */
// By Mark Miller
// http://wiki.ecmascript.org/doku.php?id=strawman:concurrency&rev=1308776521#allfulfilled
Q.all = all;
function all(promises) {
    return when(promises, function (promises) {
        var pendingCount = 0;
        var deferred = defer();
        array_reduce(promises, function (undefined, promise, index) {
            var snapshot;
            if (
                isPromise(promise) &&
                (snapshot = promise.inspect()).state === "fulfilled"
            ) {
                promises[index] = snapshot.value;
            } else {
                ++pendingCount;
                when(
                    promise,
                    function (value) {
                        promises[index] = value;
                        if (--pendingCount === 0) {
                            deferred.resolve(promises);
                        }
                    },
                    deferred.reject,
                    function (progress) {
                        deferred.notify({ index: index, value: progress });
                    }
                );
            }
        }, void 0);
        if (pendingCount === 0) {
            deferred.resolve(promises);
        }
        return deferred.promise;
    });
}

Promise.prototype.all = function () {
    return all(this);
};

/**
 * Returns the first resolved promise of an array. Prior rejected promises are
 * ignored.  Rejects only if all promises are rejected.
 * @param {Array*} an array containing values or promises for values
 * @returns a promise fulfilled with the value of the first resolved promise,
 * or a rejected promise if all promises are rejected.
 */
Q.any = any;

function any(promises) {
    if (promises.length === 0) {
        return Q.resolve();
    }

    var deferred = Q.defer();
    var pendingCount = 0;
    array_reduce(promises, function (prev, current, index) {
        var promise = promises[index];

        pendingCount++;

        when(promise, onFulfilled, onRejected, onProgress);
        function onFulfilled(result) {
            deferred.resolve(result);
        }
        function onRejected(err) {
            pendingCount--;
            if (pendingCount === 0) {
                var rejection = err || new Error("" + err);

                rejection.message = ("Q can't get fulfillment value from any promise, all " +
                    "promises were rejected. Last error message: " + rejection.message);

                deferred.reject(rejection);
            }
        }
        function onProgress(progress) {
            deferred.notify({
                index: index,
                value: progress
            });
        }
    }, undefined);

    return deferred.promise;
}

Promise.prototype.any = function () {
    return any(this);
};

/**
 * Waits for all promises to be settled, either fulfilled or
 * rejected.  This is distinct from `all` since that would stop
 * waiting at the first rejection.  The promise returned by
 * `allResolved` will never be rejected.
 * @param promises a promise for an array (or an array) of promises
 * (or values)
 * @return a promise for an array of promises
 */
Q.allResolved = deprecate(allResolved, "allResolved", "allSettled");
function allResolved(promises) {
    return when(promises, function (promises) {
        promises = array_map(promises, Q);
        return when(all(array_map(promises, function (promise) {
            return when(promise, noop, noop);
        })), function () {
            return promises;
        });
    });
}

Promise.prototype.allResolved = function () {
    return allResolved(this);
};

/**
 * @see Promise#allSettled
 */
Q.allSettled = allSettled;
function allSettled(promises) {
    return Q(promises).allSettled();
}

/**
 * Turns an array of promises into a promise for an array of their states (as
 * returned by `inspect`) when they have all settled.
 * @param {Array[Any*]} values an array (or promise for an array) of values (or
 * promises for values)
 * @returns {Array[State]} an array of states for the respective values.
 */
Promise.prototype.allSettled = function () {
    return this.then(function (promises) {
        return all(array_map(promises, function (promise) {
            promise = Q(promise);
            function regardless() {
                return promise.inspect();
            }
            return promise.then(regardless, regardless);
        }));
    });
};

/**
 * Captures the failure of a promise, giving an oportunity to recover
 * with a callback.  If the given promise is fulfilled, the returned
 * promise is fulfilled.
 * @param {Any*} promise for something
 * @param {Function} callback to fulfill the returned promise if the
 * given promise is rejected
 * @returns a promise for the return value of the callback
 */
Q.fail = // XXX legacy
Q["catch"] = function (object, rejected) {
    return Q(object).then(void 0, rejected);
};

Promise.prototype.fail = // XXX legacy
Promise.prototype["catch"] = function (rejected) {
    return this.then(void 0, rejected);
};

/**
 * Attaches a listener that can respond to progress notifications from a
 * promise's originating deferred. This listener receives the exact arguments
 * passed to ``deferred.notify``.
 * @param {Any*} promise for something
 * @param {Function} callback to receive any progress notifications
 * @returns the given promise, unchanged
 */
Q.progress = progress;
function progress(object, progressed) {
    return Q(object).then(void 0, void 0, progressed);
}

Promise.prototype.progress = function (progressed) {
    return this.then(void 0, void 0, progressed);
};

/**
 * Provides an opportunity to observe the settling of a promise,
 * regardless of whether the promise is fulfilled or rejected.  Forwards
 * the resolution to the returned promise when the callback is done.
 * The callback can return a promise to defer completion.
 * @param {Any*} promise
 * @param {Function} callback to observe the resolution of the given
 * promise, takes no arguments.
 * @returns a promise for the resolution of the given promise when
 * ``fin`` is done.
 */
Q.fin = // XXX legacy
Q["finally"] = function (object, callback) {
    return Q(object)["finally"](callback);
};

Promise.prototype.fin = // XXX legacy
Promise.prototype["finally"] = function (callback) {
    if (!callback || typeof callback.apply !== "function") {
        throw new Error("Q can't apply finally callback");
    }
    callback = Q(callback);
    return this.then(function (value) {
        return callback.fcall().then(function () {
            return value;
        });
    }, function (reason) {
        // TODO attempt to recycle the rejection with "this".
        return callback.fcall().then(function () {
            throw reason;
        });
    });
};

/**
 * Terminates a chain of promises, forcing rejections to be
 * thrown as exceptions.
 * @param {Any*} promise at the end of a chain of promises
 * @returns nothing
 */
Q.done = function (object, fulfilled, rejected, progress) {
    return Q(object).done(fulfilled, rejected, progress);
};

Promise.prototype.done = function (fulfilled, rejected, progress) {
    var onUnhandledError = function (error) {
        // forward to a future turn so that ``when``
        // does not catch it and turn it into a rejection.
        Q.nextTick(function () {
            makeStackTraceLong(error, promise);
            if (Q.onerror) {
                Q.onerror(error);
            } else {
                throw error;
            }
        });
    };

    // Avoid unnecessary `nextTick`ing via an unnecessary `when`.
    var promise = fulfilled || rejected || progress ?
        this.then(fulfilled, rejected, progress) :
        this;

    if (typeof process === "object" && process && process.domain) {
        onUnhandledError = process.domain.bind(onUnhandledError);
    }

    promise.then(void 0, onUnhandledError);
};

/**
 * Causes a promise to be rejected if it does not get fulfilled before
 * some milliseconds time out.
 * @param {Any*} promise
 * @param {Number} milliseconds timeout
 * @param {Any*} custom error message or Error object (optional)
 * @returns a promise for the resolution of the given promise if it is
 * fulfilled before the timeout, otherwise rejected.
 */
Q.timeout = function (object, ms, error) {
    return Q(object).timeout(ms, error);
};

Promise.prototype.timeout = function (ms, error) {
    var deferred = defer();
    var timeoutId = setTimeout(function () {
        if (!error || "string" === typeof error) {
            error = new Error(error || "Timed out after " + ms + " ms");
            error.code = "ETIMEDOUT";
        }
        deferred.reject(error);
    }, ms);

    this.then(function (value) {
        clearTimeout(timeoutId);
        deferred.resolve(value);
    }, function (exception) {
        clearTimeout(timeoutId);
        deferred.reject(exception);
    }, deferred.notify);

    return deferred.promise;
};

/**
 * Returns a promise for the given value (or promised value), some
 * milliseconds after it resolved. Passes rejections immediately.
 * @param {Any*} promise
 * @param {Number} milliseconds
 * @returns a promise for the resolution of the given promise after milliseconds
 * time has elapsed since the resolution of the given promise.
 * If the given promise rejects, that is passed immediately.
 */
Q.delay = function (object, timeout) {
    if (timeout === void 0) {
        timeout = object;
        object = void 0;
    }
    return Q(object).delay(timeout);
};

Promise.prototype.delay = function (timeout) {
    return this.then(function (value) {
        var deferred = defer();
        setTimeout(function () {
            deferred.resolve(value);
        }, timeout);
        return deferred.promise;
    });
};

/**
 * Passes a continuation to a Node function, which is called with the given
 * arguments provided as an array, and returns a promise.
 *
 *      Q.nfapply(FS.readFile, [__filename])
 *      .then(function (content) {
 *      })
 *
 */
Q.nfapply = function (callback, args) {
    return Q(callback).nfapply(args);
};

Promise.prototype.nfapply = function (args) {
    var deferred = defer();
    var nodeArgs = array_slice(args);
    nodeArgs.push(deferred.makeNodeResolver());
    this.fapply(nodeArgs).fail(deferred.reject);
    return deferred.promise;
};

/**
 * Passes a continuation to a Node function, which is called with the given
 * arguments provided individually, and returns a promise.
 * @example
 * Q.nfcall(FS.readFile, __filename)
 * .then(function (content) {
 * })
 *
 */
Q.nfcall = function (callback /*...args*/) {
    var args = array_slice(arguments, 1);
    return Q(callback).nfapply(args);
};

Promise.prototype.nfcall = function (/*...args*/) {
    var nodeArgs = array_slice(arguments);
    var deferred = defer();
    nodeArgs.push(deferred.makeNodeResolver());
    this.fapply(nodeArgs).fail(deferred.reject);
    return deferred.promise;
};

/**
 * Wraps a NodeJS continuation passing function and returns an equivalent
 * version that returns a promise.
 * @example
 * Q.nfbind(FS.readFile, __filename)("utf-8")
 * .then(console.log)
 * .done()
 */
Q.nfbind =
Q.denodeify = function (callback /*...args*/) {
    if (callback === undefined) {
        throw new Error("Q can't wrap an undefined function");
    }
    var baseArgs = array_slice(arguments, 1);
    return function () {
        var nodeArgs = baseArgs.concat(array_slice(arguments));
        var deferred = defer();
        nodeArgs.push(deferred.makeNodeResolver());
        Q(callback).fapply(nodeArgs).fail(deferred.reject);
        return deferred.promise;
    };
};

Promise.prototype.nfbind =
Promise.prototype.denodeify = function (/*...args*/) {
    var args = array_slice(arguments);
    args.unshift(this);
    return Q.denodeify.apply(void 0, args);
};

Q.nbind = function (callback, thisp /*...args*/) {
    var baseArgs = array_slice(arguments, 2);
    return function () {
        var nodeArgs = baseArgs.concat(array_slice(arguments));
        var deferred = defer();
        nodeArgs.push(deferred.makeNodeResolver());
        function bound() {
            return callback.apply(thisp, arguments);
        }
        Q(bound).fapply(nodeArgs).fail(deferred.reject);
        return deferred.promise;
    };
};

Promise.prototype.nbind = function (/*thisp, ...args*/) {
    var args = array_slice(arguments, 0);
    args.unshift(this);
    return Q.nbind.apply(void 0, args);
};

/**
 * Calls a method of a Node-style object that accepts a Node-style
 * callback with a given array of arguments, plus a provided callback.
 * @param object an object that has the named method
 * @param {String} name name of the method of object
 * @param {Array} args arguments to pass to the method; the callback
 * will be provided by Q and appended to these arguments.
 * @returns a promise for the value or error
 */
Q.nmapply = // XXX As proposed by "Redsandro"
Q.npost = function (object, name, args) {
    return Q(object).npost(name, args);
};

Promise.prototype.nmapply = // XXX As proposed by "Redsandro"
Promise.prototype.npost = function (name, args) {
    var nodeArgs = array_slice(args || []);
    var deferred = defer();
    nodeArgs.push(deferred.makeNodeResolver());
    this.dispatch("post", [name, nodeArgs]).fail(deferred.reject);
    return deferred.promise;
};

/**
 * Calls a method of a Node-style object that accepts a Node-style
 * callback, forwarding the given variadic arguments, plus a provided
 * callback argument.
 * @param object an object that has the named method
 * @param {String} name name of the method of object
 * @param ...args arguments to pass to the method; the callback will
 * be provided by Q and appended to these arguments.
 * @returns a promise for the value or error
 */
Q.nsend = // XXX Based on Mark Miller's proposed "send"
Q.nmcall = // XXX Based on "Redsandro's" proposal
Q.ninvoke = function (object, name /*...args*/) {
    var nodeArgs = array_slice(arguments, 2);
    var deferred = defer();
    nodeArgs.push(deferred.makeNodeResolver());
    Q(object).dispatch("post", [name, nodeArgs]).fail(deferred.reject);
    return deferred.promise;
};

Promise.prototype.nsend = // XXX Based on Mark Miller's proposed "send"
Promise.prototype.nmcall = // XXX Based on "Redsandro's" proposal
Promise.prototype.ninvoke = function (name /*...args*/) {
    var nodeArgs = array_slice(arguments, 1);
    var deferred = defer();
    nodeArgs.push(deferred.makeNodeResolver());
    this.dispatch("post", [name, nodeArgs]).fail(deferred.reject);
    return deferred.promise;
};

/**
 * If a function would like to support both Node continuation-passing-style and
 * promise-returning-style, it can end its internal promise chain with
 * `nodeify(nodeback)`, forwarding the optional nodeback argument.  If the user
 * elects to use a nodeback, the result will be sent there.  If they do not
 * pass a nodeback, they will receive the result promise.
 * @param object a result (or a promise for a result)
 * @param {Function} nodeback a Node.js-style callback
 * @returns either the promise or nothing
 */
Q.nodeify = nodeify;
function nodeify(object, nodeback) {
    return Q(object).nodeify(nodeback);
}

Promise.prototype.nodeify = function (nodeback) {
    if (nodeback) {
        this.then(function (value) {
            Q.nextTick(function () {
                nodeback(null, value);
            });
        }, function (error) {
            Q.nextTick(function () {
                nodeback(error);
            });
        });
    } else {
        return this;
    }
};

Q.noConflict = function() {
    throw new Error("Q.noConflict only works when Q is used as a global");
};

// All code before this point will be filtered from stack traces.
var qEndingLine = captureLine();

return Q;

});


/***/ }),

/***/ 431:
/***/ (function(__unusedmodule, exports, __webpack_require__) {

"use strict";

var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
    result["default"] = mod;
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
const os = __importStar(__webpack_require__(87));
/**
 * Commands
 *
 * Command Format:
 *   ::name key=value,key=value::message
 *
 * Examples:
 *   ::warning::This is the message
 *   ::set-env name=MY_VAR::some value
 */
function issueCommand(command, properties, message) {
    const cmd = new Command(command, properties, message);
    process.stdout.write(cmd.toString() + os.EOL);
}
exports.issueCommand = issueCommand;
function issue(name, message = '') {
    issueCommand(name, {}, message);
}
exports.issue = issue;
const CMD_STRING = '::';
class Command {
    constructor(command, properties, message) {
        if (!command) {
            command = 'missing.command';
        }
        this.command = command;
        this.properties = properties;
        this.message = message;
    }
    toString() {
        let cmdStr = CMD_STRING + this.command;
        if (this.properties && Object.keys(this.properties).length > 0) {
            cmdStr += ' ';
            let first = true;
            for (const key in this.properties) {
                if (this.properties.hasOwnProperty(key)) {
                    const val = this.properties[key];
                    if (val) {
                        if (first) {
                            first = false;
                        }
                        else {
                            cmdStr += ',';
                        }
                        cmdStr += `${key}=${escapeProperty(val)}`;
                    }
                }
            }
        }
        cmdStr += `${CMD_STRING}${escapeData(this.message)}`;
        return cmdStr;
    }
}
/**
 * Sanitizes an input into a string so it can be passed into issueCommand safely
 * @param input input to sanitize into a string
 */
function toCommandValue(input) {
    if (input === null || input === undefined) {
        return '';
    }
    else if (typeof input === 'string' || input instanceof String) {
        return input;
    }
    return JSON.stringify(input);
}
exports.toCommandValue = toCommandValue;
function escapeData(s) {
    return toCommandValue(s)
        .replace(/%/g, '%25')
        .replace(/\r/g, '%0D')
        .replace(/\n/g, '%0A');
}
function escapeProperty(s) {
    return toCommandValue(s)
        .replace(/%/g, '%25')
        .replace(/\r/g, '%0D')
        .replace(/\n/g, '%0A')
        .replace(/:/g, '%3A')
        .replace(/,/g, '%2C');
}
//# sourceMappingURL=command.js.map

/***/ }),

/***/ 470:
/***/ (function(__unusedmodule, exports, __webpack_require__) {

"use strict";

var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
    result["default"] = mod;
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
const command_1 = __webpack_require__(431);
const os = __importStar(__webpack_require__(87));
const path = __importStar(__webpack_require__(622));
/**
 * The code to exit an action
 */
var ExitCode;
(function (ExitCode) {
    /**
     * A code indicating that the action was successful
     */
    ExitCode[ExitCode["Success"] = 0] = "Success";
    /**
     * A code indicating that the action was a failure
     */
    ExitCode[ExitCode["Failure"] = 1] = "Failure";
})(ExitCode = exports.ExitCode || (exports.ExitCode = {}));
//-----------------------------------------------------------------------
// Variables
//-----------------------------------------------------------------------
/**
 * Sets env variable for this action and future actions in the job
 * @param name the name of the variable to set
 * @param val the value of the variable. Non-string values will be converted to a string via JSON.stringify
 */
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function exportVariable(name, val) {
    const convertedVal = command_1.toCommandValue(val);
    process.env[name] = convertedVal;
    command_1.issueCommand('set-env', { name }, convertedVal);
}
exports.exportVariable = exportVariable;
/**
 * Registers a secret which will get masked from logs
 * @param secret value of the secret
 */
function setSecret(secret) {
    command_1.issueCommand('add-mask', {}, secret);
}
exports.setSecret = setSecret;
/**
 * Prepends inputPath to the PATH (for this action and future actions)
 * @param inputPath
 */
function addPath(inputPath) {
    command_1.issueCommand('add-path', {}, inputPath);
    process.env['PATH'] = `${inputPath}${path.delimiter}${process.env['PATH']}`;
}
exports.addPath = addPath;
/**
 * Gets the value of an input.  The value is also trimmed.
 *
 * @param     name     name of the input to get
 * @param     options  optional. See InputOptions.
 * @returns   string
 */
function getInput(name, options) {
    const val = process.env[`INPUT_${name.replace(/ /g, '_').toUpperCase()}`] || '';
    if (options && options.required && !val) {
        throw new Error(`Input required and not supplied: ${name}`);
    }
    return val.trim();
}
exports.getInput = getInput;
/**
 * Sets the value of an output.
 *
 * @param     name     name of the output to set
 * @param     value    value to store. Non-string values will be converted to a string via JSON.stringify
 */
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function setOutput(name, value) {
    command_1.issueCommand('set-output', { name }, value);
}
exports.setOutput = setOutput;
/**
 * Enables or disables the echoing of commands into stdout for the rest of the step.
 * Echoing is disabled by default if ACTIONS_STEP_DEBUG is not set.
 *
 */
function setCommandEcho(enabled) {
    command_1.issue('echo', enabled ? 'on' : 'off');
}
exports.setCommandEcho = setCommandEcho;
//-----------------------------------------------------------------------
// Results
//-----------------------------------------------------------------------
/**
 * Sets the action status to failed.
 * When the action exits it will be with an exit code of 1
 * @param message add error issue message
 */
function setFailed(message) {
    process.exitCode = ExitCode.Failure;
    error(message);
}
exports.setFailed = setFailed;
//-----------------------------------------------------------------------
// Logging Commands
//-----------------------------------------------------------------------
/**
 * Gets whether Actions Step Debug is on or not
 */
function isDebug() {
    return process.env['RUNNER_DEBUG'] === '1';
}
exports.isDebug = isDebug;
/**
 * Writes debug message to user log
 * @param message debug message
 */
function debug(message) {
    command_1.issueCommand('debug', {}, message);
}
exports.debug = debug;
/**
 * Adds an error issue
 * @param message error issue message. Errors will be converted to string via toString()
 */
function error(message) {
    command_1.issue('error', message instanceof Error ? message.toString() : message);
}
exports.error = error;
/**
 * Adds an warning issue
 * @param message warning issue message. Errors will be converted to string via toString()
 */
function warning(message) {
    command_1.issue('warning', message instanceof Error ? message.toString() : message);
}
exports.warning = warning;
/**
 * Writes info to log with console.log.
 * @param message info message
 */
function info(message) {
    process.stdout.write(message + os.EOL);
}
exports.info = info;
/**
 * Begin an output group.
 *
 * Output until the next `groupEnd` will be foldable in this group
 *
 * @param name The name of the output group
 */
function startGroup(name) {
    command_1.issue('group', name);
}
exports.startGroup = startGroup;
/**
 * End an output group.
 */
function endGroup() {
    command_1.issue('endgroup');
}
exports.endGroup = endGroup;
/**
 * Wrap an asynchronous function call in a group.
 *
 * Returns the same type as the function itself.
 *
 * @param name The name of the group
 * @param fn The function to wrap in the group
 */
function group(name, fn) {
    return __awaiter(this, void 0, void 0, function* () {
        startGroup(name);
        let result;
        try {
            result = yield fn();
        }
        finally {
            endGroup();
        }
        return result;
    });
}
exports.group = group;
//-----------------------------------------------------------------------
// Wrapper action state
//-----------------------------------------------------------------------
/**
 * Saves state for current action, the state can only be retrieved by this action's post job execution.
 *
 * @param     name     name of the state to store
 * @param     value    value to store. Non-string values will be converted to a string via JSON.stringify
 */
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function saveState(name, value) {
    command_1.issueCommand('save-state', { name }, value);
}
exports.saveState = saveState;
/**
 * Gets the value of an state set by this action's main execution.
 *
 * @param     name     name of the state to get
 * @returns   string
 */
function getState(name) {
    return process.env[`STATE_${name}`] || '';
}
exports.getState = getState;
//# sourceMappingURL=core.js.map

/***/ }),

/***/ 521:
/***/ (function(module, __unusedexports, __webpack_require__) {

"use strict";


/**
 * A builder builds command line arguments for ping in window environment
 * @module lib/builder/win
 */
var util = __webpack_require__(669);

var builder = {};

/**
 * Cross platform config representation
 * @typedef {Object} PingConfig
 * @property {boolean} numeric - Map IP address to hostname or not
 * @property {number} timeout - Timeout in seconds for each ping request
 * @property {number} min_reply - Exit after sending number of ECHO_REQUEST
 * @property {boolean} v6 - Use IPv4 (default) or IPv6
 * @property {string} sourceAddr - source address for sending the ping
 * @property {number} packetSize - Specifies the number of data bytes to be sent
 *                                 Default: Linux / MAC: 56 Bytes,
 *                                          Window: 32 Bytes
 * @property {string[]} extra - Optional options does not provided
 */

var defaultConfig = {
    numeric: true,
    timeout: 5,
    min_reply: 1,
    v6: false,
    sourceAddr: '',
    packetSize: 32,
    extra: [],
};

/**
 * Get the finalized array of command line arguments
 * @param {string} target - hostname or ip address
 * @param {PingConfig} [config] - Configuration object for cmd line argument
 * @return {string[]} - Command line argument according to the configuration
 */
builder.getCommandArguments = function (target, config) {
    var _config = config || {};

    // Empty argument
    var ret = [];

    // Make every key in config has been setup properly
    var keys = [
        'numeric', 'timeout', 'min_reply', 'v6', 'sourceAddr', 'extra',
        'packetSize',
    ];
    keys.forEach(function (k) {
        // Falsy value will be overrided without below checking
        if (typeof(_config[k]) !== 'boolean') {
            _config[k] = _config[k] || defaultConfig[k];
        }
    });

    ret.push(_config.v6 ? '-6' : '-4');

    if (!_config.numeric) {
        ret.push('-a');
    }

    if (_config.timeout) {
        // refs #56: Unit problem
        // Our timeout is in second while timeout in window is in milliseconds
        // so we need to convert our units accordingly
        ret = ret.concat([
            '-w',
            util.format('%d', _config.timeout * 1000),
        ]);
    }

    if (_config.deadline) {
        throw new Error('There is no deadline option on windows');
    }

    if (_config.min_reply) {
        ret = ret.concat([
            '-n',
            util.format('%d', _config.min_reply),
        ]);
    }

    if (_config.sourceAddr) {
        ret = ret.concat([
            '-S',
            util.format('%s', _config.sourceAddr),
        ]);
    }

    if (_config.packetSize) {
        ret = ret.concat([
            '-l',
            util.format('%d', _config.packetSize),
        ]);
    }

    if (_config.extra) {
        ret = ret.concat(_config.extra);
    }

    ret.push(target);

    return ret;
};

/**
 * Compute an option object for child_process.spawn
 * @return {object} - Refer to document of child_process.spawn
 */
builder.getSpawnOptions = function () {
    return {};
};

module.exports = builder;


/***/ }),

/***/ 544:
/***/ (function(module, __unusedexports, __webpack_require__) {

var ping = {};

ping.sys = __webpack_require__(697);
//ping.pcap = require('./lib/ping-pcap');
ping.promise = __webpack_require__(995);

module.exports = ping;


/***/ }),

/***/ 582:
/***/ (function(module, __unusedexports, __webpack_require__) {

"use strict";


var __ = __webpack_require__(891);
var util = __webpack_require__(669);

// Our library
var linuxBuilder = __webpack_require__(752);
var macBuilder = __webpack_require__(721);
var winBuilder = __webpack_require__(521);

/**
 * A factory creates argument builders for different platform
 * @constructor
 */
function factory() {}

/**
 * Check out linux platform
 */
factory.isLinux = function (p) {
    var platforms = [
        'aix',
        'android',
        'linux',
    ];

    return platforms.indexOf(p) >= 0;
};

/**
 * Check out macos platform
 */
factory.isMacOS = function (p) {
    var platforms = [
        'darwin',
        'freebsd',
    ];

    return platforms.indexOf(p) >= 0;
};

/**
 * Check out window platform
 */
factory.isWindow = function (p) {
    return p && p.match(/^win/) !== null;
};

/**
 * Check whether given platform is supported
 * @param {string} p - Name of the platform
 * @return {bool} - True or False
 */
factory.isPlatformSupport = function (p) {
    return __.some([
        this.isWindow(p),
        this.isLinux(p),
        this.isMacOS(p),
    ]);
};

/**
 * Return a path to the ping executable in the system
 * @param {string} platform - Name of the platform
 * @param {bool} v6 - Ping via ipv6 or not
 * @return {string} - Executable path for system command ping
 * @throw if given platform is not supported
 */
factory.getExecutablePath = function (platform, v6) {
    if (!this.isPlatformSupport(platform)) {
        throw new Error(util.format('Platform |%s| is not support', platform));
    }

    var ret = null;

    if (platform === 'aix') {
        ret = '/usr/sbin/ping';
    } else if (factory.isLinux(platform)) {
        ret = v6 ? 'ping6' : 'ping';
    } else if (factory.isWindow(platform)) {
        ret = process.env.SystemRoot + '/system32/ping.exe';
    } else if (factory.isMacOS(platform)) {
        ret = v6 ? '/sbin/ping6' : '/sbin/ping';
    }

    return ret;
};

/**
 * Create a builder
 * @param {string} platform - Name of the platform
 * @return {object} - Argument builder
 * @throw if given platform is not supported
 */
factory.createBuilder = function (platform) {
    if (!this.isPlatformSupport(platform)) {
        throw new Error(util.format('Platform |%s| is not support', platform));
    }

    var ret = null;

    if (factory.isLinux(platform)) {
        ret = linuxBuilder;
    } else if (factory.isWindow(platform)) {
        ret = winBuilder;
    } else if (factory.isMacOS(platform)) {
        ret = macBuilder;
    }

    return ret;
};

module.exports = factory;


/***/ }),

/***/ 609:
/***/ (function(module, __unusedexports, __webpack_require__) {

"use strict";


var util = __webpack_require__(669);

var builderFactory = __webpack_require__(582);
var WinParser = __webpack_require__(879);
var MacParser = __webpack_require__(755);
var LinuxParser = __webpack_require__(682);

/**
 * A factory creates a parser for parsing output from system ping
 * @constructor
 */
function factory() {}

/**
 * Create a parser for a given platform
 * @param {string} platform - Name of the platform
 * @param {PingConfig} [config] - Config object in probe()
 * @return {object} - Parser
 * @throw if given platform is not supported
 */
factory.createParser = function (platform, config) {
    // Avoid function reassignment
    var _config = config || {};

    if (!builderFactory.isPlatformSupport(platform)) {
        throw new Error(util.format('Platform |%s| is not support', platform));
    }

    var ret = null;
    if (builderFactory.isWindow(platform)) {
        ret = new WinParser(_config);
    } else if (builderFactory.isMacOS(platform)) {
        ret = new MacParser(_config);
    } else if (builderFactory.isLinux(platform)) {
        ret = new LinuxParser(_config);
    }

    return ret;
};

module.exports = factory;


/***/ }),

/***/ 622:
/***/ (function(module) {

module.exports = require("path");

/***/ }),

/***/ 669:
/***/ (function(module) {

module.exports = require("util");

/***/ }),

/***/ 682:
/***/ (function(module, __unusedexports, __webpack_require__) {

"use strict";


var util = __webpack_require__(669);
var base = __webpack_require__(719);
var MacParser = __webpack_require__(755);

/**
 * @constructor
 * @param {PingConfig} config - Config object in probe()
 */
function LinuxParser(config) {
    base.call(this, config);
}

util.inherits(LinuxParser, base);

/**
 * Process output's body
 * @param {string} line - A line from system ping
 */
LinuxParser.prototype._processHeader = function (line) {
    // Get host and numeric_host
    var tokens = line.split(' ');
    var isProbablyIPv4 = tokens[1].indexOf('(') === -1;

    if (isProbablyIPv4) {
        this._response.host = tokens[1];
        this._response.numeric_host = tokens[2].slice(1, -1);
    } else {
        // Normalise into either a 2 or 3 element array
        var foundAddresses = tokens.slice(1, -3).join('').match(/([^\s()]+)/g);
        this._response.host = foundAddresses.shift();
        this._response.numeric_host = foundAddresses.pop();
    }

    this._changeState(this.STATES.BODY);
};

/**
 * Process output's body
 * @param {string} line - A line from system ping
 */
LinuxParser.prototype._processBody = function (line) {
    // Reuse mac parser implementation
    MacParser.prototype._processBody.call(this, line);
};

/**
 * Process output's footer
 * @param {string} line - A line from system ping
 */
LinuxParser.prototype._processFooter = function (line) {
    // Reuse mac parser implementation
    MacParser.prototype._processFooter.call(this, line);
};

module.exports = LinuxParser;


/***/ }),

/***/ 697:
/***/ (function(__unusedmodule, exports, __webpack_require__) {

"use strict";


/**
* LICENSE MIT
* (C) Daniel Zelisko
* http://github.com/danielzzz/node-ping
*
* a simple wrapper for ping
* Now with support of not only english Windows.
*
*/

// Promise implementation
var ping = __webpack_require__(995);

// TODO:
// 1. Port round trip time to this callback
// 2. However, it may breaks backward compatability
// 3. Need discussion
/**
 * Callback after probing given host
 * @callback probeCallback
 * @param {boolean} isAlive - Whether target is alive or not
 * @param {Object} error - Null if no error occurs
 */

/**
 * Class::Ping construtor
 *
 * @param {string} addr - Hostname or ip addres
 * @param {probeCallback} cb - Callback
 * @param {PingConfig} config - Configuration for command ping
 */
function probe(addr, cb, config) {
    // Do not reassign function parameter
    var _config = config || {};

    return ping.probe(addr, _config).then(function (res) {
        cb(res.alive, null);
    }).catch(function (err) {
        cb(null, err);
    }).done();
}

exports.probe = probe;


/***/ }),

/***/ 719:
/***/ (function(module, __unusedexports, __webpack_require__) {

"use strict";


/* eslint no-unused-vars: 0 */

var __ = __webpack_require__(891);

/**
 * Parsed response
 * @typedef {object} PingResponse
 * @param {string} host - The input IP address or HOST
 * @param {string} numeric_host - Target IP address
 * @param {boolean} alive - True for existed host
 * @param {string} output - Raw stdout from system ping
 * @param {number} time - Time (float) in ms for first successful ping response
 * @param {string} min - Minimum time for collection records
 * @param {string} max - Maximum time for collection records
 * @param {string} avg - Average time for collection records
 * @param {number} packetLoss - Packet Losses in percent (number)
 * @param {string} stddev - Standard deviation time for collected records
 */

/**
 * @constructor
 *
 * @param {PingConfig} config - Config object in probe()
 */
function parser(config) {
    // Initial state is 0
    this._state = 0;

    // Initial cache value
    this._response = {
        host: 'unknown',
        alive: false,
        output: 'unknown',
        time: 'unknown',
        times: [],
        min: 'unknown',
        max: 'unknown',
        avg: 'unknown',
        stddev: 'unknown',
        packetLoss: 'unknown',
    };

    // Initial times storage for ping time
    this._times = [];

    // Initial lines storage for ping output
    this._lines = [];

    // strip string regexp
    this._stripRegex = /[ ]*\r?\n?$/g;

    // Ping Config
    this._pingConfig = config || {};
}

/**
 * Enum for parser states
 * @readonly
 * @enum {number}
 */
parser.prototype.STATES = {
    INIT: 0,
    HEADER: 1,
    BODY: 2,
    FOOTER: 3,
    END: 4,
};

/**
 * Change state of this parser
 * @param {number} state - parser.STATES
 * @return {this} - This instance
 */
parser.prototype._changeState = function (state) {
    var states = __.values(this.STATES);
    if (states.indexOf(state) < 0) {
        throw new Error('Unknown state');
    }

    this._state = state;

    return this;
};

/**
 * Process output's header
 * @param {string} line - A line from system ping
 */
parser.prototype._processHeader = function (line) {
    throw new Error('Subclass should implement this method');
};

/**
 * Process output's body
 * @param {string} line - A line from system ping
 */
parser.prototype._processBody = function (line) {
    throw new Error('Subclass should implement this method');
};

/**
 * Process output's footer
 * @param {string} line - A line from system ping
 */
parser.prototype._processFooter = function (line) {
    throw new Error('Subclass should implement this method');
};

/**
 * Process a line from system ping
 * @param {string} line - A line from system ping
 * @return {this} - This instance
 */
parser.prototype.eat = function (line) {
    var headerStates = [
        this.STATES.INIT,
        this.STATES.HEADER,
    ];

    // Store lines
    this._lines.push(line);

    // Strip all space \r\n at the end
    var _line = line.replace(this._stripRegex, '');

    if (_line.length === 0) {
        // Do nothing if this is an empty line
    } else if (headerStates.indexOf(this._state) >= 0) {
        this._processHeader(_line);
    } else if (this._state === this.STATES.BODY) {
        this._processBody(_line);
    } else if (this._state === this.STATES.FOOTER) {
        this._processFooter(_line);
    } else if (this._state === this.STATES.END) {
        // Do nothing
    } else {
        throw new Error('Unknown state');
    }

    return this;
};

/**
 * Get results after parsing certain lines from system ping
 * @return {PingResponse} - Response from parsing ping output
 */
parser.prototype.getResult = function () {
    var ret = __.extend({}, this._response);

    // Concat output
    ret.output = this._lines.join('\n');

    // Determine alive
    ret.alive = this._times.length > 0;

    // Update time at first successful line
    if (ret.alive) {
        ret.time = this._response.time = this._times[0];
        ret.times = this._response.times = this._times;
    }

    // Get stddev
    if (
        ret.stddev === 'unknown' && ret.alive
    ) {
        var N = this._times.length;

        var variances = __.reduce(this._times, function (m, time) {
            return m + Math.pow((time - ret.avg), 2);
        }, 0) / N;

        ret.stddev = Math.round(
            Math.sqrt(variances) * 1000
        ) / 1000;
    }

    // Fix min, avg, max, stddev up to 3 decimal points
    __.each(['min', 'avg', 'max', 'stddev', 'packetLoss'], function (key) {
        var v = ret[key];
        if (__.isNumber(v)) {
            ret[key] = v.toFixed(3);
        }
    });

    return ret;
};

module.exports = parser;


/***/ }),

/***/ 721:
/***/ (function(module, __unusedexports, __webpack_require__) {

"use strict";


/**
 * A builder builds command line arguments for ping in mac environment
 * @module lib/builder/mac
 */
var util = __webpack_require__(669);

var builder = {};

/**
 * Cross platform config representation
 * @typedef {Object} PingConfig
 * @property {boolean} numeric - Map IP address to hostname or not
 * @property {number} timeout - Time to wait for a response, in seconds.
 * The option affects only timeout  in  absence  of any responses,
 * otherwise ping waits for two RTTs.
 * @property {number} deadline - Specify a timeout, in seconds,
 * before ping exits regardless of how many packets have been sent or received.
 * In this case ping does not stop after count packet are sent,
 * it waits either for deadline expire or until count probes are answered
 * or for some error notification from network.
 * This option is only available on linux and mac.
 * @property {number} min_reply - Exit after sending number of ECHO_REQUEST
 * @property {boolean} v6 - Use IPv4 (default) or IPv6
 * @property {string} sourceAddr - source address for sending the ping
 * @property {number} packetSize - Specifies the number of data bytes to be sent
 *                                 Default: Linux / MAC: 56 Bytes,
 *                                          Window: 32 Bytes
 * @property {string[]} extra - Optional options does not provided
 */

var defaultConfig = {
    numeric: true,
    timeout: 2,
    deadline: false,
    min_reply: 1,
    v6: false,
    sourceAddr: '',
    packetSize: 56,
    extra: [],
};

/**
 * Get the finalized array of command line arguments
 * @param {string} target - hostname or ip address
 * @param {PingConfig} [config] - Configuration object for cmd line argument
 * @return {string[]} - Command line argument according to the configuration
 * @throws If there are errors on building arguments with given inputs
 */
builder.getCommandArguments = function (target, config) {
    var _config = config || {};

    // Empty argument
    var ret = [];

    // Make every key in config has been setup properly
    var keys = ['numeric', 'timeout', 'deadline', 'min_reply', 'v6',
        'sourceAddr', 'extra', 'packetSize'];
    keys.forEach(function (k) {
        // Falsy value will be overridden without below checking
        if (typeof(_config[k]) !== 'boolean') {
            _config[k] = _config[k] || defaultConfig[k];
        }
    });

    if (_config.numeric) {
        ret.push('-n');
    }

    if (_config.timeout) {
        // XXX: There is no timeout option on mac's ping6
        if (config.v6) {
            throw new Error('There is no timeout option on ping6');
        }

        ret = ret.concat([
            '-W',
            util.format('%d', _config.timeout * 1000),
        ]);
    }

    if (_config.deadline) {
        ret = ret.concat([
            '-t',
            util.format('%d', _config.deadline),
        ]);
    }

    if (_config.min_reply) {
        ret = ret.concat([
            '-c',
            util.format('%d', _config.min_reply),
        ]);
    }

    if (_config.sourceAddr) {
        ret = ret.concat([
            '-S',
            util.format('%s', _config.sourceAddr),
        ]);
    }

    if (_config.packetSize) {
        ret = ret.concat([
            '-s',
            util.format('%d', _config.packetSize),
        ]);
    }

    if (_config.extra) {
        ret = ret.concat(_config.extra);
    }

    ret.push(target);

    return ret;
};

/**
 * Compute an option object for child_process.spawn
 * @return {object} - Refer to document of child_process.spawn
 */
builder.getSpawnOptions = function () {
    return {};
};


module.exports = builder;


/***/ }),

/***/ 752:
/***/ (function(module, __unusedexports, __webpack_require__) {

"use strict";


/**
 * A builder builds command line arguments for ping in linux environment
 * @module lib/builder/linux
 */
var util = __webpack_require__(669);

var builder = {};

/**
 * Cross platform config representation
 * @typedef {Object} PingConfig
 * @property {boolean} numeric - Map IP address to hostname or not
 * @property {number} timeout - Time to wait for a response, in seconds.
 * The option affects only timeout  in  absence  of any responses,
 * otherwise ping waits for two RTTs.
 * @property {number} deadline - Specify a timeout, in seconds,
 * before ping exits regardless of how many packets have been sent or received.
 * In this case ping does not stop after count packet are sent,
 * it waits either for deadline expire or until count probes are answered
 * or for some error notification from network.
 * This option is only available on linux and mac.
 * @property {number} min_reply - Exit after sending number of ECHO_REQUEST
 * @property {boolean} v6 - Use IPv4 (default) or IPv6
 * @property {string} sourceAddr - source address for sending the ping
 * @property {number} packetSize - Specifies the number of data bytes to be sent
 *                                 Default: Linux / MAC: 56 Bytes,
 *                                          Window: 32 Bytes
 * @property {string[]} extra - Optional options does not provided
 */

var defaultConfig = {
    numeric: true,
    timeout: 2,
    deadline: false,
    min_reply: 1,
    v6: false,
    sourceAddr: '',
    packetSize: 56,
    extra: [],
};

/**
 * Get the finalized array of command line arguments
 * @param {string} target - hostname or ip address
 * @param {PingConfig} [config] - Configuration object for cmd line argument
 * @return {string[]} - Command line argument according to the configuration
 */
builder.getCommandArguments = function (target, config) {
    var _config = config || {};

    // Empty argument
    var ret = [];

    // Make every key in config has been setup properly
    var keys = ['numeric', 'timeout', 'deadline', 'min_reply', 'v6',
        'sourceAddr', 'extra', 'packetSize'];
    keys.forEach(function (k) {
        // Falsy value will be overridden without below checking
        if (typeof(_config[k]) !== 'boolean') {
            _config[k] = _config[k] || defaultConfig[k];
        }
    });

    if (_config.numeric) {
        ret.push('-n');
    }

    if (_config.timeout) {
        ret = ret.concat([
            '-W',
            util.format('%d', _config.timeout),
        ]);
    }

    if (_config.deadline) {
        ret = ret.concat([
            '-w',
            util.format('%d', _config.deadline),
        ]);
    }

    if (_config.min_reply) {
        ret = ret.concat([
            '-c',
            util.format('%d', _config.min_reply),
        ]);
    }

    if (_config.sourceAddr) {
        ret = ret.concat([
            '-I',
            util.format('%s', _config.sourceAddr),
        ]);
    }

    if (_config.packetSize) {
        ret = ret.concat([
            '-s',
            util.format('%d', _config.packetSize),
        ]);
    }

    if (_config.extra) {
        ret = ret.concat(_config.extra);
    }

    ret.push(target);

    return ret;
};

/**
 * Compute an option object for child_process.spawn
 * @return {object} - Refer to document of child_process.spawn
 */
builder.getSpawnOptions = function () {
    return {
        shell: true,
    };
};

module.exports = builder;


/***/ }),

/***/ 755:
/***/ (function(module, __unusedexports, __webpack_require__) {

"use strict";


var util = __webpack_require__(669);
var __ = __webpack_require__(891);

var base = __webpack_require__(719);

/**
 * @constructor
 * @param {PingConfig} config - Config object in probe()
 */
function MacParser(config) {
    base.call(this, config);
}

util.inherits(MacParser, base);

/**
 * Process output's header
 * @param {string} line - A line from system ping
 */
MacParser.prototype._processHeader = function (line) {
    // Get host and numeric_host
    var tokens = line.split(' ');

    this._response.host = tokens[1];
    this._response.numeric_host = tokens[2].slice(1, -2);

    this._changeState(this.STATES.BODY);
};

/**
 * Process output's body
 * @param {string} line - A line from system ping
 */
MacParser.prototype._processBody = function (line) {
    // XXX: Assume there is at least 3 '=' can be found
    var count = (line.match(/=/g) || []).length;
    if (count >= 3) {
        var regExp = /([0-9.]+)[ ]*ms/;
        var match = regExp.exec(line);
        this._times.push(parseFloat(match[1], 10));
    }

    // Change state if it see a '---'
    if (line.indexOf('---') >= 0) {
        this._changeState(this.STATES.FOOTER);
    }
};

/**
 * Process output's footer
 * @param {string} line - A line from system ping
 */
MacParser.prototype._processFooter = function (line) {
    var packetLoss = line.match(/ ([\d.]+)%/);
    if (packetLoss) {
        this._response.packetLoss = parseFloat(packetLoss[1], 10);
    }

    // XXX: Assume number of keywords '/' more than 3
    var count = (line.match(/[/]/g) || []).length;
    if (count >= 3) {
        var regExp = /([0-9.]+)/g;
        // XXX: Assume min avg max stddev
        var m1 = regExp.exec(line);
        var m2 = regExp.exec(line);
        var m3 = regExp.exec(line);
        var m4 = regExp.exec(line);

        if (__.all([m1, m2, m3, m4])) {
            this._response.min = parseFloat(m1[1], 10);
            this._response.avg = parseFloat(m2[1], 10);
            this._response.max = parseFloat(m3[1], 10);
            this._response.stddev = parseFloat(m4[1], 10);
            this._changeState(this.STATES.END);
        }

        this._changeState(this.STATES.END);
    }
};

module.exports = MacParser;


/***/ }),

/***/ 848:
/***/ (function(module) {

"use strict";


module.exports = Object.freeze({
  encoding: 'utf8',
  silent: false
})


/***/ }),

/***/ 877:
/***/ (function(module, __unusedexports, __webpack_require__) {

"use strict";


function isObject(obj) {
  return obj !== null && typeof obj === 'object' && !Array.isArray(obj)
}

function toBoolean(bool) {
  if (bool === 'false') bool = false
  return !!bool
}

function normaliseOptions(options) {

  var DEFAULTS = __webpack_require__(848)

  if (!isObject(options)) {
    options = {}
  } else {

    if (typeof options.silent !== 'undefined') {
      options.silent = toBoolean(options.silent)
    }
  }

  options = Object.assign({}, DEFAULTS, options)

  if (options.silent && typeof options.stdio === 'undefined') {
    options.stdio = 'pipe'
  }

  return options
}

module.exports = normaliseOptions


/***/ }),

/***/ 879:
/***/ (function(module, __unusedexports, __webpack_require__) {

"use strict";


var util = __webpack_require__(669);
var __ = __webpack_require__(891);

var base = __webpack_require__(719);

/**
 * @constructor
 * @param {PingConfig} config - Config object in probe()
 */
function WinParser(config) {
    base.call(this, config);
    this._ipv4Regex = /^([0-9]{1,3}\.){3}[0-9]{1,3}$/;
}

util.inherits(WinParser, base);

/**
 * Process output's header
 * @param {string} line - A line from system ping
 */
WinParser.prototype._processHeader = function (line) {
    // XXX: Expect to find [****] when pinging domain like google.com
    //      Read fixture/win/**/* for the detail
    var isPingNumeric = line.indexOf('[') === -1;

    // Get host and numeric_host
    var tokens = line.split(' ');

    if (isPingNumeric) {
        // For those missing [***], get the first token which match IPV4 regex
        this._response.host = __.find(tokens, function (t) {
            return this._ipv4Regex.test(t);
        }, this);
        this._response.numeric_host = this._response.host;
    } else {
        // For those has [***], anchor with such token
        var numericHost = __.find(tokens, function (t) {
            return t.indexOf('[') !== -1;
        }, this);
        var numericHostIndex = tokens.indexOf(numericHost);
        var match = /\[(.*)\]/.exec(numericHost);

        if (match) {
            // Capture IP inside [] only. refs #71
            this._response.numeric_host = match[1];
        } else {
            // Otherwise, just mark as NA to indicate an error
            this._response.numeric_host = 'NA';
        }
        this._response.host = tokens[numericHostIndex - 1];
    }

    this._changeState(this.STATES.BODY);
};

/**
 * Process ipv6 output's body
 * @param {string} line - A line from system ping
 */
WinParser.prototype._processIPV6Body = function (line) {
    var tokens = line.split(' ');
    var dataFields = __.filter(tokens, function (token) {
        var isDataField = token.indexOf('=') >= 0 || token.indexOf('<') >= 0;
        return isDataField;
    });

    // refs #65: Support system like french which has an extra space
    dataFields = __.map(dataFields, function (dataField) {
        var ret = dataField;
        var dataFieldIndex = tokens.indexOf(dataField);
        var nextIndex = dataFieldIndex + 1;

        // Append the missing *ms*
        if (nextIndex < tokens.length) {
            if (tokens[nextIndex] === 'ms') {
                ret += 'ms';
            }
        }

        return ret;
    });

    var expectDataFieldInReplyLine = 1;
    if (dataFields.length >= expectDataFieldInReplyLine) {
        // XXX: Assume time will alaways get keyword ms for all language
        var timeKVP = __.find(dataFields, function (dataField) {
            return dataField.search(/(ms|мс)/i) >= 0;
        });
        var regExp = /([0-9.]+)/;
        var match = regExp.exec(timeKVP);

        this._times.push(parseFloat(match[1], 10));
    }
};

/**
 * Process ipv4 output's body
 * @param {string} line - A line from system ping
 */
WinParser.prototype._processIPV4Body = function (line) {
    var tokens = line.split(' ');
    var byteTimeTTLFields = __.filter(tokens, function (token) {
        var isDataField = token.indexOf('=') >= 0 || token.indexOf('<') >= 0;
        return isDataField;
    });

    var expectDataFieldInReplyLine = 3;
    var isReplyLine = byteTimeTTLFields.length >= expectDataFieldInReplyLine;
    if (isReplyLine) {
        var packetSize = this._pingConfig.packetSize;
        var byteField = __.find(byteTimeTTLFields, function (dataField) {
            var packetSizeToken = util.format('=%d', packetSize);
            var isByteField = dataField.indexOf(packetSizeToken) >= 0;
            return isByteField;
        });

        // XXX: Assume time field will always be next of byte field
        var byteFieldIndex = byteTimeTTLFields.indexOf(byteField);
        var timeFieldIndex = byteFieldIndex + 1;
        var timeKVP = byteTimeTTLFields[timeFieldIndex];

        var regExp = /([0-9.]+)/;
        var match = regExp.exec(timeKVP);

        this._times.push(parseFloat(match[1], 10));
    }
};

/**
 * Process output's body
 * @param {string} line - A line from system ping
 */
WinParser.prototype._processBody = function (line) {
    var isPingSummaryLineShown = line.slice(-1) === ':';
    if (isPingSummaryLineShown) {
        this._changeState(this.STATES.FOOTER);
        return;
    }

    var isIPV6 = this._pingConfig.v6;
    if (isIPV6) {
        this._processIPV6Body(line);
    } else {
        this._processIPV4Body(line);
    }
};

/**
 * Process output's footer
 * @param {string} line - A line from system ping
 */
WinParser.prototype._processFooter = function (line) {
    var packetLoss = line.match(/([\d.]+)%/);
    if (packetLoss) {
        this._response.packetLoss = parseFloat(packetLoss[1], 10);
    }

    // XXX: Assume there is a keyword ms
    if (line.search(/(ms|мсек)/i) >= 0) {
        // XXX: Assume the ordering is Min Max Avg
        var regExp = /([0-9.]+)/g;
        var m1 = regExp.exec(line);
        var m2 = regExp.exec(line);
        var m3 = regExp.exec(line);

        if (__.all([m1, m2, m3])) {
            this._response.min = parseFloat(m1[1], 10);
            this._response.max = parseFloat(m2[1], 10);
            this._response.avg = parseFloat(m3[1], 10);
            this._changeState(this.STATES.END);
        }
    }
};

module.exports = WinParser;


/***/ }),

/***/ 891:
/***/ (function(module) {

(function (global, factory) {
   true ? module.exports = factory() :
  undefined;
}(this, (function () {

  //     Underscore.js 1.10.2
  //     https://underscorejs.org
  //     (c) 2009-2020 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  //     Underscore may be freely distributed under the MIT license.

  // Baseline setup
  // --------------

  // Establish the root object, `window` (`self`) in the browser, `global`
  // on the server, or `this` in some virtual machines. We use `self`
  // instead of `window` for `WebWorker` support.
  var root = typeof self == 'object' && self.self === self && self ||
            typeof global == 'object' && global.global === global && global ||
            Function('return this')() ||
            {};

  // Save bytes in the minified (but not gzipped) version:
  var ArrayProto = Array.prototype, ObjProto = Object.prototype;
  var SymbolProto = typeof Symbol !== 'undefined' ? Symbol.prototype : null;

  // Create quick reference variables for speed access to core prototypes.
  var push = ArrayProto.push,
      slice = ArrayProto.slice,
      toString = ObjProto.toString,
      hasOwnProperty = ObjProto.hasOwnProperty;

  // All **ECMAScript 5** native function implementations that we hope to use
  // are declared here.
  var nativeIsArray = Array.isArray,
      nativeKeys = Object.keys,
      nativeCreate = Object.create;

  // Create references to these builtin functions because we override them.
  var _isNaN = root.isNaN,
      _isFinite = root.isFinite;

  // Naked function reference for surrogate-prototype-swapping.
  var Ctor = function(){};

  // The Underscore object. All exported functions below are added to it in the
  // modules/index-all.js using the mixin function.
  function _(obj) {
    if (obj instanceof _) return obj;
    if (!(this instanceof _)) return new _(obj);
    this._wrapped = obj;
  }

  // Current version.
  var VERSION = _.VERSION = '1.10.2';

  // Internal function that returns an efficient (for current engines) version
  // of the passed-in callback, to be repeatedly applied in other Underscore
  // functions.
  function optimizeCb(func, context, argCount) {
    if (context === void 0) return func;
    switch (argCount == null ? 3 : argCount) {
      case 1: return function(value) {
        return func.call(context, value);
      };
      // The 2-argument case is omitted because we’re not using it.
      case 3: return function(value, index, collection) {
        return func.call(context, value, index, collection);
      };
      case 4: return function(accumulator, value, index, collection) {
        return func.call(context, accumulator, value, index, collection);
      };
    }
    return function() {
      return func.apply(context, arguments);
    };
  }

  // An internal function to generate callbacks that can be applied to each
  // element in a collection, returning the desired result — either `identity`,
  // an arbitrary callback, a property matcher, or a property accessor.
  function baseIteratee(value, context, argCount) {
    if (value == null) return identity;
    if (isFunction(value)) return optimizeCb(value, context, argCount);
    if (isObject(value) && !isArray(value)) return matcher(value);
    return property(value);
  }

  // External wrapper for our callback generator. Users may customize
  // `_.iteratee` if they want additional predicate/iteratee shorthand styles.
  // This abstraction hides the internal-only argCount argument.
  _.iteratee = iteratee;
  function iteratee(value, context) {
    return baseIteratee(value, context, Infinity);
  }

  // The function we actually call internally. It invokes _.iteratee if
  // overridden, otherwise baseIteratee.
  function cb(value, context, argCount) {
    if (_.iteratee !== iteratee) return _.iteratee(value, context);
    return baseIteratee(value, context, argCount);
  }

  // Some functions take a variable number of arguments, or a few expected
  // arguments at the beginning and then a variable number of values to operate
  // on. This helper accumulates all remaining arguments past the function’s
  // argument length (or an explicit `startIndex`), into an array that becomes
  // the last argument. Similar to ES6’s "rest parameter".
  function restArguments(func, startIndex) {
    startIndex = startIndex == null ? func.length - 1 : +startIndex;
    return function() {
      var length = Math.max(arguments.length - startIndex, 0),
          rest = Array(length),
          index = 0;
      for (; index < length; index++) {
        rest[index] = arguments[index + startIndex];
      }
      switch (startIndex) {
        case 0: return func.call(this, rest);
        case 1: return func.call(this, arguments[0], rest);
        case 2: return func.call(this, arguments[0], arguments[1], rest);
      }
      var args = Array(startIndex + 1);
      for (index = 0; index < startIndex; index++) {
        args[index] = arguments[index];
      }
      args[startIndex] = rest;
      return func.apply(this, args);
    };
  }

  // An internal function for creating a new object that inherits from another.
  function baseCreate(prototype) {
    if (!isObject(prototype)) return {};
    if (nativeCreate) return nativeCreate(prototype);
    Ctor.prototype = prototype;
    var result = new Ctor;
    Ctor.prototype = null;
    return result;
  }

  function shallowProperty(key) {
    return function(obj) {
      return obj == null ? void 0 : obj[key];
    };
  }

  function _has(obj, path) {
    return obj != null && hasOwnProperty.call(obj, path);
  }

  function deepGet(obj, path) {
    var length = path.length;
    for (var i = 0; i < length; i++) {
      if (obj == null) return void 0;
      obj = obj[path[i]];
    }
    return length ? obj : void 0;
  }

  // Helper for collection methods to determine whether a collection
  // should be iterated as an array or as an object.
  // Related: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength
  // Avoids a very nasty iOS 8 JIT bug on ARM-64. #2094
  var MAX_ARRAY_INDEX = Math.pow(2, 53) - 1;
  var getLength = shallowProperty('length');
  function isArrayLike(collection) {
    var length = getLength(collection);
    return typeof length == 'number' && length >= 0 && length <= MAX_ARRAY_INDEX;
  }

  // Collection Functions
  // --------------------

  // The cornerstone, an `each` implementation, aka `forEach`.
  // Handles raw objects in addition to array-likes. Treats all
  // sparse array-likes as if they were dense.
  function each(obj, iteratee, context) {
    iteratee = optimizeCb(iteratee, context);
    var i, length;
    if (isArrayLike(obj)) {
      for (i = 0, length = obj.length; i < length; i++) {
        iteratee(obj[i], i, obj);
      }
    } else {
      var _keys = keys(obj);
      for (i = 0, length = _keys.length; i < length; i++) {
        iteratee(obj[_keys[i]], _keys[i], obj);
      }
    }
    return obj;
  }

  // Return the results of applying the iteratee to each element.
  function map(obj, iteratee, context) {
    iteratee = cb(iteratee, context);
    var _keys = !isArrayLike(obj) && keys(obj),
        length = (_keys || obj).length,
        results = Array(length);
    for (var index = 0; index < length; index++) {
      var currentKey = _keys ? _keys[index] : index;
      results[index] = iteratee(obj[currentKey], currentKey, obj);
    }
    return results;
  }

  // Create a reducing function iterating left or right.
  function createReduce(dir) {
    // Wrap code that reassigns argument variables in a separate function than
    // the one that accesses `arguments.length` to avoid a perf hit. (#1991)
    var reducer = function(obj, iteratee, memo, initial) {
      var _keys = !isArrayLike(obj) && keys(obj),
          length = (_keys || obj).length,
          index = dir > 0 ? 0 : length - 1;
      if (!initial) {
        memo = obj[_keys ? _keys[index] : index];
        index += dir;
      }
      for (; index >= 0 && index < length; index += dir) {
        var currentKey = _keys ? _keys[index] : index;
        memo = iteratee(memo, obj[currentKey], currentKey, obj);
      }
      return memo;
    };

    return function(obj, iteratee, memo, context) {
      var initial = arguments.length >= 3;
      return reducer(obj, optimizeCb(iteratee, context, 4), memo, initial);
    };
  }

  // **Reduce** builds up a single result from a list of values, aka `inject`,
  // or `foldl`.
  var reduce = createReduce(1);

  // The right-associative version of reduce, also known as `foldr`.
  var reduceRight = createReduce(-1);

  // Return the first value which passes a truth test.
  function find(obj, predicate, context) {
    var keyFinder = isArrayLike(obj) ? findIndex : findKey;
    var key = keyFinder(obj, predicate, context);
    if (key !== void 0 && key !== -1) return obj[key];
  }

  // Return all the elements that pass a truth test.
  function filter(obj, predicate, context) {
    var results = [];
    predicate = cb(predicate, context);
    each(obj, function(value, index, list) {
      if (predicate(value, index, list)) results.push(value);
    });
    return results;
  }

  // Return all the elements for which a truth test fails.
  function reject(obj, predicate, context) {
    return filter(obj, negate(cb(predicate)), context);
  }

  // Determine whether all of the elements match a truth test.
  function every(obj, predicate, context) {
    predicate = cb(predicate, context);
    var _keys = !isArrayLike(obj) && keys(obj),
        length = (_keys || obj).length;
    for (var index = 0; index < length; index++) {
      var currentKey = _keys ? _keys[index] : index;
      if (!predicate(obj[currentKey], currentKey, obj)) return false;
    }
    return true;
  }

  // Determine if at least one element in the object matches a truth test.
  function some(obj, predicate, context) {
    predicate = cb(predicate, context);
    var _keys = !isArrayLike(obj) && keys(obj),
        length = (_keys || obj).length;
    for (var index = 0; index < length; index++) {
      var currentKey = _keys ? _keys[index] : index;
      if (predicate(obj[currentKey], currentKey, obj)) return true;
    }
    return false;
  }

  // Determine if the array or object contains a given item (using `===`).
  function contains(obj, item, fromIndex, guard) {
    if (!isArrayLike(obj)) obj = values(obj);
    if (typeof fromIndex != 'number' || guard) fromIndex = 0;
    return indexOf(obj, item, fromIndex) >= 0;
  }

  // Invoke a method (with arguments) on every item in a collection.
  var invoke = restArguments(function(obj, path, args) {
    var contextPath, func;
    if (isFunction(path)) {
      func = path;
    } else if (isArray(path)) {
      contextPath = path.slice(0, -1);
      path = path[path.length - 1];
    }
    return map(obj, function(context) {
      var method = func;
      if (!method) {
        if (contextPath && contextPath.length) {
          context = deepGet(context, contextPath);
        }
        if (context == null) return void 0;
        method = context[path];
      }
      return method == null ? method : method.apply(context, args);
    });
  });

  // Convenience version of a common use case of `map`: fetching a property.
  function pluck(obj, key) {
    return map(obj, property(key));
  }

  // Convenience version of a common use case of `filter`: selecting only objects
  // containing specific `key:value` pairs.
  function where(obj, attrs) {
    return filter(obj, matcher(attrs));
  }

  // Convenience version of a common use case of `find`: getting the first object
  // containing specific `key:value` pairs.
  function findWhere(obj, attrs) {
    return find(obj, matcher(attrs));
  }

  // Return the maximum element (or element-based computation).
  function max(obj, iteratee, context) {
    var result = -Infinity, lastComputed = -Infinity,
        value, computed;
    if (iteratee == null || typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null) {
      obj = isArrayLike(obj) ? obj : values(obj);
      for (var i = 0, length = obj.length; i < length; i++) {
        value = obj[i];
        if (value != null && value > result) {
          result = value;
        }
      }
    } else {
      iteratee = cb(iteratee, context);
      each(obj, function(v, index, list) {
        computed = iteratee(v, index, list);
        if (computed > lastComputed || computed === -Infinity && result === -Infinity) {
          result = v;
          lastComputed = computed;
        }
      });
    }
    return result;
  }

  // Return the minimum element (or element-based computation).
  function min(obj, iteratee, context) {
    var result = Infinity, lastComputed = Infinity,
        value, computed;
    if (iteratee == null || typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null) {
      obj = isArrayLike(obj) ? obj : values(obj);
      for (var i = 0, length = obj.length; i < length; i++) {
        value = obj[i];
        if (value != null && value < result) {
          result = value;
        }
      }
    } else {
      iteratee = cb(iteratee, context);
      each(obj, function(v, index, list) {
        computed = iteratee(v, index, list);
        if (computed < lastComputed || computed === Infinity && result === Infinity) {
          result = v;
          lastComputed = computed;
        }
      });
    }
    return result;
  }

  // Shuffle a collection.
  function shuffle(obj) {
    return sample(obj, Infinity);
  }

  // Sample **n** random values from a collection using the modern version of the
  // [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher–Yates_shuffle).
  // If **n** is not specified, returns a single random element.
  // The internal `guard` argument allows it to work with `map`.
  function sample(obj, n, guard) {
    if (n == null || guard) {
      if (!isArrayLike(obj)) obj = values(obj);
      return obj[random(obj.length - 1)];
    }
    var sample = isArrayLike(obj) ? clone(obj) : values(obj);
    var length = getLength(sample);
    n = Math.max(Math.min(n, length), 0);
    var last = length - 1;
    for (var index = 0; index < n; index++) {
      var rand = random(index, last);
      var temp = sample[index];
      sample[index] = sample[rand];
      sample[rand] = temp;
    }
    return sample.slice(0, n);
  }

  // Sort the object's values by a criterion produced by an iteratee.
  function sortBy(obj, iteratee, context) {
    var index = 0;
    iteratee = cb(iteratee, context);
    return pluck(map(obj, function(value, key, list) {
      return {
        value: value,
        index: index++,
        criteria: iteratee(value, key, list)
      };
    }).sort(function(left, right) {
      var a = left.criteria;
      var b = right.criteria;
      if (a !== b) {
        if (a > b || a === void 0) return 1;
        if (a < b || b === void 0) return -1;
      }
      return left.index - right.index;
    }), 'value');
  }

  // An internal function used for aggregate "group by" operations.
  function group(behavior, partition) {
    return function(obj, iteratee, context) {
      var result = partition ? [[], []] : {};
      iteratee = cb(iteratee, context);
      each(obj, function(value, index) {
        var key = iteratee(value, index, obj);
        behavior(result, value, key);
      });
      return result;
    };
  }

  // Groups the object's values by a criterion. Pass either a string attribute
  // to group by, or a function that returns the criterion.
  var groupBy = group(function(result, value, key) {
    if (_has(result, key)) result[key].push(value); else result[key] = [value];
  });

  // Indexes the object's values by a criterion, similar to `groupBy`, but for
  // when you know that your index values will be unique.
  var indexBy = group(function(result, value, key) {
    result[key] = value;
  });

  // Counts instances of an object that group by a certain criterion. Pass
  // either a string attribute to count by, or a function that returns the
  // criterion.
  var countBy = group(function(result, value, key) {
    if (_has(result, key)) result[key]++; else result[key] = 1;
  });

  var reStrSymbol = /[^\ud800-\udfff]|[\ud800-\udbff][\udc00-\udfff]|[\ud800-\udfff]/g;
  // Safely create a real, live array from anything iterable.
  function toArray(obj) {
    if (!obj) return [];
    if (isArray(obj)) return slice.call(obj);
    if (isString(obj)) {
      // Keep surrogate pair characters together
      return obj.match(reStrSymbol);
    }
    if (isArrayLike(obj)) return map(obj, identity);
    return values(obj);
  }

  // Return the number of elements in an object.
  function size(obj) {
    if (obj == null) return 0;
    return isArrayLike(obj) ? obj.length : keys(obj).length;
  }

  // Split a collection into two arrays: one whose elements all satisfy the given
  // predicate, and one whose elements all do not satisfy the predicate.
  var partition = group(function(result, value, pass) {
    result[pass ? 0 : 1].push(value);
  }, true);

  // Array Functions
  // ---------------

  // Get the first element of an array. Passing **n** will return the first N
  // values in the array. The **guard** check allows it to work with `map`.
  function first(array, n, guard) {
    if (array == null || array.length < 1) return n == null ? void 0 : [];
    if (n == null || guard) return array[0];
    return initial(array, array.length - n);
  }

  // Returns everything but the last entry of the array. Especially useful on
  // the arguments object. Passing **n** will return all the values in
  // the array, excluding the last N.
  function initial(array, n, guard) {
    return slice.call(array, 0, Math.max(0, array.length - (n == null || guard ? 1 : n)));
  }

  // Get the last element of an array. Passing **n** will return the last N
  // values in the array.
  function last(array, n, guard) {
    if (array == null || array.length < 1) return n == null ? void 0 : [];
    if (n == null || guard) return array[array.length - 1];
    return rest(array, Math.max(0, array.length - n));
  }

  // Returns everything but the first entry of the array. Especially useful on
  // the arguments object. Passing an **n** will return the rest N values in the
  // array.
  function rest(array, n, guard) {
    return slice.call(array, n == null || guard ? 1 : n);
  }

  // Trim out all falsy values from an array.
  function compact(array) {
    return filter(array, Boolean);
  }

  // Internal implementation of a recursive `flatten` function.
  function _flatten(input, shallow, strict, output) {
    output = output || [];
    var idx = output.length;
    for (var i = 0, length = getLength(input); i < length; i++) {
      var value = input[i];
      if (isArrayLike(value) && (isArray(value) || isArguments(value))) {
        // Flatten current level of array or arguments object.
        if (shallow) {
          var j = 0, len = value.length;
          while (j < len) output[idx++] = value[j++];
        } else {
          _flatten(value, shallow, strict, output);
          idx = output.length;
        }
      } else if (!strict) {
        output[idx++] = value;
      }
    }
    return output;
  }

  // Flatten out an array, either recursively (by default), or just one level.
  function flatten(array, shallow) {
    return _flatten(array, shallow, false);
  }

  // Return a version of the array that does not contain the specified value(s).
  var without = restArguments(function(array, otherArrays) {
    return difference(array, otherArrays);
  });

  // Produce a duplicate-free version of the array. If the array has already
  // been sorted, you have the option of using a faster algorithm.
  // The faster algorithm will not work with an iteratee if the iteratee
  // is not a one-to-one function, so providing an iteratee will disable
  // the faster algorithm.
  function uniq(array, isSorted, iteratee, context) {
    if (!isBoolean(isSorted)) {
      context = iteratee;
      iteratee = isSorted;
      isSorted = false;
    }
    if (iteratee != null) iteratee = cb(iteratee, context);
    var result = [];
    var seen = [];
    for (var i = 0, length = getLength(array); i < length; i++) {
      var value = array[i],
          computed = iteratee ? iteratee(value, i, array) : value;
      if (isSorted && !iteratee) {
        if (!i || seen !== computed) result.push(value);
        seen = computed;
      } else if (iteratee) {
        if (!contains(seen, computed)) {
          seen.push(computed);
          result.push(value);
        }
      } else if (!contains(result, value)) {
        result.push(value);
      }
    }
    return result;
  }

  // Produce an array that contains the union: each distinct element from all of
  // the passed-in arrays.
  var union = restArguments(function(arrays) {
    return uniq(_flatten(arrays, true, true));
  });

  // Produce an array that contains every item shared between all the
  // passed-in arrays.
  function intersection(array) {
    var result = [];
    var argsLength = arguments.length;
    for (var i = 0, length = getLength(array); i < length; i++) {
      var item = array[i];
      if (contains(result, item)) continue;
      var j;
      for (j = 1; j < argsLength; j++) {
        if (!contains(arguments[j], item)) break;
      }
      if (j === argsLength) result.push(item);
    }
    return result;
  }

  // Take the difference between one array and a number of other arrays.
  // Only the elements present in just the first array will remain.
  var difference = restArguments(function(array, rest) {
    rest = _flatten(rest, true, true);
    return filter(array, function(value){
      return !contains(rest, value);
    });
  });

  // Complement of zip. Unzip accepts an array of arrays and groups
  // each array's elements on shared indices.
  function unzip(array) {
    var length = array && max(array, getLength).length || 0;
    var result = Array(length);

    for (var index = 0; index < length; index++) {
      result[index] = pluck(array, index);
    }
    return result;
  }

  // Zip together multiple lists into a single array -- elements that share
  // an index go together.
  var zip = restArguments(unzip);

  // Converts lists into objects. Pass either a single array of `[key, value]`
  // pairs, or two parallel arrays of the same length -- one of keys, and one of
  // the corresponding values. Passing by pairs is the reverse of pairs.
  function object(list, values) {
    var result = {};
    for (var i = 0, length = getLength(list); i < length; i++) {
      if (values) {
        result[list[i]] = values[i];
      } else {
        result[list[i][0]] = list[i][1];
      }
    }
    return result;
  }

  // Generator function to create the findIndex and findLastIndex functions.
  function createPredicateIndexFinder(dir) {
    return function(array, predicate, context) {
      predicate = cb(predicate, context);
      var length = getLength(array);
      var index = dir > 0 ? 0 : length - 1;
      for (; index >= 0 && index < length; index += dir) {
        if (predicate(array[index], index, array)) return index;
      }
      return -1;
    };
  }

  // Returns the first index on an array-like that passes a predicate test.
  var findIndex = createPredicateIndexFinder(1);
  var findLastIndex = createPredicateIndexFinder(-1);

  // Use a comparator function to figure out the smallest index at which
  // an object should be inserted so as to maintain order. Uses binary search.
  function sortedIndex(array, obj, iteratee, context) {
    iteratee = cb(iteratee, context, 1);
    var value = iteratee(obj);
    var low = 0, high = getLength(array);
    while (low < high) {
      var mid = Math.floor((low + high) / 2);
      if (iteratee(array[mid]) < value) low = mid + 1; else high = mid;
    }
    return low;
  }

  // Generator function to create the indexOf and lastIndexOf functions.
  function createIndexFinder(dir, predicateFind, sortedIndex) {
    return function(array, item, idx) {
      var i = 0, length = getLength(array);
      if (typeof idx == 'number') {
        if (dir > 0) {
          i = idx >= 0 ? idx : Math.max(idx + length, i);
        } else {
          length = idx >= 0 ? Math.min(idx + 1, length) : idx + length + 1;
        }
      } else if (sortedIndex && idx && length) {
        idx = sortedIndex(array, item);
        return array[idx] === item ? idx : -1;
      }
      if (item !== item) {
        idx = predicateFind(slice.call(array, i, length), isNaN);
        return idx >= 0 ? idx + i : -1;
      }
      for (idx = dir > 0 ? i : length - 1; idx >= 0 && idx < length; idx += dir) {
        if (array[idx] === item) return idx;
      }
      return -1;
    };
  }

  // Return the position of the first occurrence of an item in an array,
  // or -1 if the item is not included in the array.
  // If the array is large and already in sort order, pass `true`
  // for **isSorted** to use binary search.
  var indexOf = createIndexFinder(1, findIndex, sortedIndex);
  var lastIndexOf = createIndexFinder(-1, findLastIndex);

  // Generate an integer Array containing an arithmetic progression. A port of
  // the native Python `range()` function. See
  // [the Python documentation](https://docs.python.org/library/functions.html#range).
  function range(start, stop, step) {
    if (stop == null) {
      stop = start || 0;
      start = 0;
    }
    if (!step) {
      step = stop < start ? -1 : 1;
    }

    var length = Math.max(Math.ceil((stop - start) / step), 0);
    var range = Array(length);

    for (var idx = 0; idx < length; idx++, start += step) {
      range[idx] = start;
    }

    return range;
  }

  // Chunk a single array into multiple arrays, each containing `count` or fewer
  // items.
  function chunk(array, count) {
    if (count == null || count < 1) return [];
    var result = [];
    var i = 0, length = array.length;
    while (i < length) {
      result.push(slice.call(array, i, i += count));
    }
    return result;
  }

  // Function (ahem) Functions
  // ------------------

  // Determines whether to execute a function as a constructor
  // or a normal function with the provided arguments.
  function executeBound(sourceFunc, boundFunc, context, callingContext, args) {
    if (!(callingContext instanceof boundFunc)) return sourceFunc.apply(context, args);
    var self = baseCreate(sourceFunc.prototype);
    var result = sourceFunc.apply(self, args);
    if (isObject(result)) return result;
    return self;
  }

  // Create a function bound to a given object (assigning `this`, and arguments,
  // optionally). Delegates to **ECMAScript 5**'s native `Function.bind` if
  // available.
  var bind = restArguments(function(func, context, args) {
    if (!isFunction(func)) throw new TypeError('Bind must be called on a function');
    var bound = restArguments(function(callArgs) {
      return executeBound(func, bound, context, this, args.concat(callArgs));
    });
    return bound;
  });

  // Partially apply a function by creating a version that has had some of its
  // arguments pre-filled, without changing its dynamic `this` context. _ acts
  // as a placeholder by default, allowing any combination of arguments to be
  // pre-filled. Set `partial.placeholder` for a custom placeholder argument.
  var partial = restArguments(function(func, boundArgs) {
    var placeholder = partial.placeholder;
    var bound = function() {
      var position = 0, length = boundArgs.length;
      var args = Array(length);
      for (var i = 0; i < length; i++) {
        args[i] = boundArgs[i] === placeholder ? arguments[position++] : boundArgs[i];
      }
      while (position < arguments.length) args.push(arguments[position++]);
      return executeBound(func, bound, this, this, args);
    };
    return bound;
  });

  partial.placeholder = _;

  // Bind a number of an object's methods to that object. Remaining arguments
  // are the method names to be bound. Useful for ensuring that all callbacks
  // defined on an object belong to it.
  var bindAll = restArguments(function(obj, _keys) {
    _keys = _flatten(_keys, false, false);
    var index = _keys.length;
    if (index < 1) throw new Error('bindAll must be passed function names');
    while (index--) {
      var key = _keys[index];
      obj[key] = bind(obj[key], obj);
    }
  });

  // Memoize an expensive function by storing its results.
  function memoize(func, hasher) {
    var memoize = function(key) {
      var cache = memoize.cache;
      var address = '' + (hasher ? hasher.apply(this, arguments) : key);
      if (!_has(cache, address)) cache[address] = func.apply(this, arguments);
      return cache[address];
    };
    memoize.cache = {};
    return memoize;
  }

  // Delays a function for the given number of milliseconds, and then calls
  // it with the arguments supplied.
  var delay = restArguments(function(func, wait, args) {
    return setTimeout(function() {
      return func.apply(null, args);
    }, wait);
  });

  // Defers a function, scheduling it to run after the current call stack has
  // cleared.
  var defer = partial(delay, _, 1);

  // Returns a function, that, when invoked, will only be triggered at most once
  // during a given window of time. Normally, the throttled function will run
  // as much as it can, without ever going more than once per `wait` duration;
  // but if you'd like to disable the execution on the leading edge, pass
  // `{leading: false}`. To disable execution on the trailing edge, ditto.
  function throttle(func, wait, options) {
    var timeout, context, args, result;
    var previous = 0;
    if (!options) options = {};

    var later = function() {
      previous = options.leading === false ? 0 : now();
      timeout = null;
      result = func.apply(context, args);
      if (!timeout) context = args = null;
    };

    var throttled = function() {
      var _now = now();
      if (!previous && options.leading === false) previous = _now;
      var remaining = wait - (_now - previous);
      context = this;
      args = arguments;
      if (remaining <= 0 || remaining > wait) {
        if (timeout) {
          clearTimeout(timeout);
          timeout = null;
        }
        previous = _now;
        result = func.apply(context, args);
        if (!timeout) context = args = null;
      } else if (!timeout && options.trailing !== false) {
        timeout = setTimeout(later, remaining);
      }
      return result;
    };

    throttled.cancel = function() {
      clearTimeout(timeout);
      previous = 0;
      timeout = context = args = null;
    };

    return throttled;
  }

  // Returns a function, that, as long as it continues to be invoked, will not
  // be triggered. The function will be called after it stops being called for
  // N milliseconds. If `immediate` is passed, trigger the function on the
  // leading edge, instead of the trailing.
  function debounce(func, wait, immediate) {
    var timeout, result;

    var later = function(context, args) {
      timeout = null;
      if (args) result = func.apply(context, args);
    };

    var debounced = restArguments(function(args) {
      if (timeout) clearTimeout(timeout);
      if (immediate) {
        var callNow = !timeout;
        timeout = setTimeout(later, wait);
        if (callNow) result = func.apply(this, args);
      } else {
        timeout = delay(later, wait, this, args);
      }

      return result;
    });

    debounced.cancel = function() {
      clearTimeout(timeout);
      timeout = null;
    };

    return debounced;
  }

  // Returns the first function passed as an argument to the second,
  // allowing you to adjust arguments, run code before and after, and
  // conditionally execute the original function.
  function wrap(func, wrapper) {
    return partial(wrapper, func);
  }

  // Returns a negated version of the passed-in predicate.
  function negate(predicate) {
    return function() {
      return !predicate.apply(this, arguments);
    };
  }

  // Returns a function that is the composition of a list of functions, each
  // consuming the return value of the function that follows.
  function compose() {
    var args = arguments;
    var start = args.length - 1;
    return function() {
      var i = start;
      var result = args[start].apply(this, arguments);
      while (i--) result = args[i].call(this, result);
      return result;
    };
  }

  // Returns a function that will only be executed on and after the Nth call.
  function after(times, func) {
    return function() {
      if (--times < 1) {
        return func.apply(this, arguments);
      }
    };
  }

  // Returns a function that will only be executed up to (but not including) the Nth call.
  function before(times, func) {
    var memo;
    return function() {
      if (--times > 0) {
        memo = func.apply(this, arguments);
      }
      if (times <= 1) func = null;
      return memo;
    };
  }

  // Returns a function that will be executed at most one time, no matter how
  // often you call it. Useful for lazy initialization.
  var once = partial(before, 2);

  // Object Functions
  // ----------------

  // Keys in IE < 9 that won't be iterated by `for key in ...` and thus missed.
  var hasEnumBug = !{toString: null}.propertyIsEnumerable('toString');
  var nonEnumerableProps = ['valueOf', 'isPrototypeOf', 'toString',
    'propertyIsEnumerable', 'hasOwnProperty', 'toLocaleString'];

  function collectNonEnumProps(obj, _keys) {
    var nonEnumIdx = nonEnumerableProps.length;
    var constructor = obj.constructor;
    var proto = isFunction(constructor) && constructor.prototype || ObjProto;

    // Constructor is a special case.
    var prop = 'constructor';
    if (_has(obj, prop) && !contains(_keys, prop)) _keys.push(prop);

    while (nonEnumIdx--) {
      prop = nonEnumerableProps[nonEnumIdx];
      if (prop in obj && obj[prop] !== proto[prop] && !contains(_keys, prop)) {
        _keys.push(prop);
      }
    }
  }

  // Retrieve the names of an object's own properties.
  // Delegates to **ECMAScript 5**'s native `Object.keys`.
  function keys(obj) {
    if (!isObject(obj)) return [];
    if (nativeKeys) return nativeKeys(obj);
    var _keys = [];
    for (var key in obj) if (_has(obj, key)) _keys.push(key);
    // Ahem, IE < 9.
    if (hasEnumBug) collectNonEnumProps(obj, _keys);
    return _keys;
  }

  // Retrieve all the property names of an object.
  function allKeys(obj) {
    if (!isObject(obj)) return [];
    var _keys = [];
    for (var key in obj) _keys.push(key);
    // Ahem, IE < 9.
    if (hasEnumBug) collectNonEnumProps(obj, _keys);
    return _keys;
  }

  // Retrieve the values of an object's properties.
  function values(obj) {
    var _keys = keys(obj);
    var length = _keys.length;
    var values = Array(length);
    for (var i = 0; i < length; i++) {
      values[i] = obj[_keys[i]];
    }
    return values;
  }

  // Returns the results of applying the iteratee to each element of the object.
  // In contrast to map it returns an object.
  function mapObject(obj, iteratee, context) {
    iteratee = cb(iteratee, context);
    var _keys = keys(obj),
        length = _keys.length,
        results = {};
    for (var index = 0; index < length; index++) {
      var currentKey = _keys[index];
      results[currentKey] = iteratee(obj[currentKey], currentKey, obj);
    }
    return results;
  }

  // Convert an object into a list of `[key, value]` pairs.
  // The opposite of object.
  function pairs(obj) {
    var _keys = keys(obj);
    var length = _keys.length;
    var pairs = Array(length);
    for (var i = 0; i < length; i++) {
      pairs[i] = [_keys[i], obj[_keys[i]]];
    }
    return pairs;
  }

  // Invert the keys and values of an object. The values must be serializable.
  function invert(obj) {
    var result = {};
    var _keys = keys(obj);
    for (var i = 0, length = _keys.length; i < length; i++) {
      result[obj[_keys[i]]] = _keys[i];
    }
    return result;
  }

  // Return a sorted list of the function names available on the object.
  function functions(obj) {
    var names = [];
    for (var key in obj) {
      if (isFunction(obj[key])) names.push(key);
    }
    return names.sort();
  }

  // An internal function for creating assigner functions.
  function createAssigner(keysFunc, defaults) {
    return function(obj) {
      var length = arguments.length;
      if (defaults) obj = Object(obj);
      if (length < 2 || obj == null) return obj;
      for (var index = 1; index < length; index++) {
        var source = arguments[index],
            _keys = keysFunc(source),
            l = _keys.length;
        for (var i = 0; i < l; i++) {
          var key = _keys[i];
          if (!defaults || obj[key] === void 0) obj[key] = source[key];
        }
      }
      return obj;
    };
  }

  // Extend a given object with all the properties in passed-in object(s).
  var extend = createAssigner(allKeys);

  // Assigns a given object with all the own properties in the passed-in object(s).
  // (https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/assign)
  var extendOwn = createAssigner(keys);

  // Returns the first key on an object that passes a predicate test.
  function findKey(obj, predicate, context) {
    predicate = cb(predicate, context);
    var _keys = keys(obj), key;
    for (var i = 0, length = _keys.length; i < length; i++) {
      key = _keys[i];
      if (predicate(obj[key], key, obj)) return key;
    }
  }

  // Internal pick helper function to determine if `obj` has key `key`.
  function keyInObj(value, key, obj) {
    return key in obj;
  }

  // Return a copy of the object only containing the whitelisted properties.
  var pick = restArguments(function(obj, _keys) {
    var result = {}, iteratee = _keys[0];
    if (obj == null) return result;
    if (isFunction(iteratee)) {
      if (_keys.length > 1) iteratee = optimizeCb(iteratee, _keys[1]);
      _keys = allKeys(obj);
    } else {
      iteratee = keyInObj;
      _keys = _flatten(_keys, false, false);
      obj = Object(obj);
    }
    for (var i = 0, length = _keys.length; i < length; i++) {
      var key = _keys[i];
      var value = obj[key];
      if (iteratee(value, key, obj)) result[key] = value;
    }
    return result;
  });

  // Return a copy of the object without the blacklisted properties.
  var omit = restArguments(function(obj, _keys) {
    var iteratee = _keys[0], context;
    if (isFunction(iteratee)) {
      iteratee = negate(iteratee);
      if (_keys.length > 1) context = _keys[1];
    } else {
      _keys = map(_flatten(_keys, false, false), String);
      iteratee = function(value, key) {
        return !contains(_keys, key);
      };
    }
    return pick(obj, iteratee, context);
  });

  // Fill in a given object with default properties.
  var defaults = createAssigner(allKeys, true);

  // Creates an object that inherits from the given prototype object.
  // If additional properties are provided then they will be added to the
  // created object.
  function create(prototype, props) {
    var result = baseCreate(prototype);
    if (props) extendOwn(result, props);
    return result;
  }

  // Create a (shallow-cloned) duplicate of an object.
  function clone(obj) {
    if (!isObject(obj)) return obj;
    return isArray(obj) ? obj.slice() : extend({}, obj);
  }

  // Invokes interceptor with the obj, and then returns obj.
  // The primary purpose of this method is to "tap into" a method chain, in
  // order to perform operations on intermediate results within the chain.
  function tap(obj, interceptor) {
    interceptor(obj);
    return obj;
  }

  // Returns whether an object has a given set of `key:value` pairs.
  function isMatch(object, attrs) {
    var _keys = keys(attrs), length = _keys.length;
    if (object == null) return !length;
    var obj = Object(object);
    for (var i = 0; i < length; i++) {
      var key = _keys[i];
      if (attrs[key] !== obj[key] || !(key in obj)) return false;
    }
    return true;
  }


  // Internal recursive comparison function for `isEqual`.
  function eq(a, b, aStack, bStack) {
    // Identical objects are equal. `0 === -0`, but they aren't identical.
    // See the [Harmony `egal` proposal](https://wiki.ecmascript.org/doku.php?id=harmony:egal).
    if (a === b) return a !== 0 || 1 / a === 1 / b;
    // `null` or `undefined` only equal to itself (strict comparison).
    if (a == null || b == null) return false;
    // `NaN`s are equivalent, but non-reflexive.
    if (a !== a) return b !== b;
    // Exhaust primitive checks
    var type = typeof a;
    if (type !== 'function' && type !== 'object' && typeof b != 'object') return false;
    return deepEq(a, b, aStack, bStack);
  }

  // Internal recursive comparison function for `isEqual`.
  function deepEq(a, b, aStack, bStack) {
    // Unwrap any wrapped objects.
    if (a instanceof _) a = a._wrapped;
    if (b instanceof _) b = b._wrapped;
    // Compare `[[Class]]` names.
    var className = toString.call(a);
    if (className !== toString.call(b)) return false;
    switch (className) {
      // Strings, numbers, regular expressions, dates, and booleans are compared by value.
      case '[object RegExp]':
      // RegExps are coerced to strings for comparison (Note: '' + /a/i === '/a/i')
      case '[object String]':
        // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
        // equivalent to `new String("5")`.
        return '' + a === '' + b;
      case '[object Number]':
        // `NaN`s are equivalent, but non-reflexive.
        // Object(NaN) is equivalent to NaN.
        if (+a !== +a) return +b !== +b;
        // An `egal` comparison is performed for other numeric values.
        return +a === 0 ? 1 / +a === 1 / b : +a === +b;
      case '[object Date]':
      case '[object Boolean]':
        // Coerce dates and booleans to numeric primitive values. Dates are compared by their
        // millisecond representations. Note that invalid dates with millisecond representations
        // of `NaN` are not equivalent.
        return +a === +b;
      case '[object Symbol]':
        return SymbolProto.valueOf.call(a) === SymbolProto.valueOf.call(b);
    }

    var areArrays = className === '[object Array]';
    if (!areArrays) {
      if (typeof a != 'object' || typeof b != 'object') return false;

      // Objects with different constructors are not equivalent, but `Object`s or `Array`s
      // from different frames are.
      var aCtor = a.constructor, bCtor = b.constructor;
      if (aCtor !== bCtor && !(isFunction(aCtor) && aCtor instanceof aCtor &&
                               isFunction(bCtor) && bCtor instanceof bCtor)
                          && ('constructor' in a && 'constructor' in b)) {
        return false;
      }
    }
    // Assume equality for cyclic structures. The algorithm for detecting cyclic
    // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.

    // Initializing stack of traversed objects.
    // It's done here since we only need them for objects and arrays comparison.
    aStack = aStack || [];
    bStack = bStack || [];
    var length = aStack.length;
    while (length--) {
      // Linear search. Performance is inversely proportional to the number of
      // unique nested structures.
      if (aStack[length] === a) return bStack[length] === b;
    }

    // Add the first object to the stack of traversed objects.
    aStack.push(a);
    bStack.push(b);

    // Recursively compare objects and arrays.
    if (areArrays) {
      // Compare array lengths to determine if a deep comparison is necessary.
      length = a.length;
      if (length !== b.length) return false;
      // Deep compare the contents, ignoring non-numeric properties.
      while (length--) {
        if (!eq(a[length], b[length], aStack, bStack)) return false;
      }
    } else {
      // Deep compare objects.
      var _keys = keys(a), key;
      length = _keys.length;
      // Ensure that both objects contain the same number of properties before comparing deep equality.
      if (keys(b).length !== length) return false;
      while (length--) {
        // Deep compare each member
        key = _keys[length];
        if (!(_has(b, key) && eq(a[key], b[key], aStack, bStack))) return false;
      }
    }
    // Remove the first object from the stack of traversed objects.
    aStack.pop();
    bStack.pop();
    return true;
  }

  // Perform a deep comparison to check if two objects are equal.
  function isEqual(a, b) {
    return eq(a, b);
  }

  // Is a given array, string, or object empty?
  // An "empty" object has no enumerable own-properties.
  function isEmpty(obj) {
    if (obj == null) return true;
    if (isArrayLike(obj) && (isArray(obj) || isString(obj) || isArguments(obj))) return obj.length === 0;
    return keys(obj).length === 0;
  }

  // Is a given value a DOM element?
  function isElement(obj) {
    return !!(obj && obj.nodeType === 1);
  }

  // Internal function for creating a toString-based type tester.
  function tagTester(name) {
    return function(obj) {
      return toString.call(obj) === '[object ' + name + ']';
    };
  }

  // Is a given value an array?
  // Delegates to ECMA5's native Array.isArray
  var isArray = nativeIsArray || tagTester('Array');

  // Is a given variable an object?
  function isObject(obj) {
    var type = typeof obj;
    return type === 'function' || type === 'object' && !!obj;
  }

  // Add some isType methods: isArguments, isFunction, isString, isNumber, isDate, isRegExp, isError, isMap, isWeakMap, isSet, isWeakSet.
  var isArguments = tagTester('Arguments');
  var isFunction = tagTester('Function');
  var isString = tagTester('String');
  var isNumber = tagTester('Number');
  var isDate = tagTester('Date');
  var isRegExp = tagTester('RegExp');
  var isError = tagTester('Error');
  var isSymbol = tagTester('Symbol');
  var isMap = tagTester('Map');
  var isWeakMap = tagTester('WeakMap');
  var isSet = tagTester('Set');
  var isWeakSet = tagTester('WeakSet');

  // Define a fallback version of the method in browsers (ahem, IE < 9), where
  // there isn't any inspectable "Arguments" type.
  (function() {
    if (!isArguments(arguments)) {
      isArguments = function(obj) {
        return _has(obj, 'callee');
      };
    }
  }());

  // Optimize `isFunction` if appropriate. Work around some typeof bugs in old v8,
  // IE 11 (#1621), Safari 8 (#1929), and PhantomJS (#2236).
  var nodelist = root.document && root.document.childNodes;
  if ( true && typeof Int8Array != 'object' && typeof nodelist != 'function') {
    isFunction = function(obj) {
      return typeof obj == 'function' || false;
    };
  }

  // Is a given object a finite number?
  function isFinite(obj) {
    return !isSymbol(obj) && _isFinite(obj) && !_isNaN(parseFloat(obj));
  }

  // Is the given value `NaN`?
  function isNaN(obj) {
    return isNumber(obj) && _isNaN(obj);
  }

  // Is a given value a boolean?
  function isBoolean(obj) {
    return obj === true || obj === false || toString.call(obj) === '[object Boolean]';
  }

  // Is a given value equal to null?
  function isNull(obj) {
    return obj === null;
  }

  // Is a given variable undefined?
  function isUndefined(obj) {
    return obj === void 0;
  }

  // Shortcut function for checking if an object has a given property directly
  // on itself (in other words, not on a prototype).
  function has(obj, path) {
    if (!isArray(path)) {
      return _has(obj, path);
    }
    var length = path.length;
    for (var i = 0; i < length; i++) {
      var key = path[i];
      if (obj == null || !hasOwnProperty.call(obj, key)) {
        return false;
      }
      obj = obj[key];
    }
    return !!length;
  }

  // Utility Functions
  // -----------------

  // Keep the identity function around for default iteratees.
  function identity(value) {
    return value;
  }

  // Predicate-generating functions. Often useful outside of Underscore.
  function constant(value) {
    return function() {
      return value;
    };
  }

  function noop(){}

  // Creates a function that, when passed an object, will traverse that object’s
  // properties down the given `path`, specified as an array of keys or indexes.
  function property(path) {
    if (!isArray(path)) {
      return shallowProperty(path);
    }
    return function(obj) {
      return deepGet(obj, path);
    };
  }

  // Generates a function for a given object that returns a given property.
  function propertyOf(obj) {
    if (obj == null) {
      return function(){};
    }
    return function(path) {
      return !isArray(path) ? obj[path] : deepGet(obj, path);
    };
  }

  // Returns a predicate for checking whether an object has a given set of
  // `key:value` pairs.
  function matcher(attrs) {
    attrs = extendOwn({}, attrs);
    return function(obj) {
      return isMatch(obj, attrs);
    };
  }

  // Run a function **n** times.
  function times(n, iteratee, context) {
    var accum = Array(Math.max(0, n));
    iteratee = optimizeCb(iteratee, context, 1);
    for (var i = 0; i < n; i++) accum[i] = iteratee(i);
    return accum;
  }

  // Return a random integer between min and max (inclusive).
  function random(min, max) {
    if (max == null) {
      max = min;
      min = 0;
    }
    return min + Math.floor(Math.random() * (max - min + 1));
  }

  // A (possibly faster) way to get the current timestamp as an integer.
  var now = Date.now || function() {
    return new Date().getTime();
  };

  // List of HTML entities for escaping.
  var escapeMap = {
    '&': '&amp;',
    '<': '&lt;',
    '>': '&gt;',
    '"': '&quot;',
    "'": '&#x27;',
    '`': '&#x60;'
  };
  var unescapeMap = invert(escapeMap);

  // Functions for escaping and unescaping strings to/from HTML interpolation.
  function createEscaper(map) {
    var escaper = function(match) {
      return map[match];
    };
    // Regexes for identifying a key that needs to be escaped.
    var source = '(?:' + keys(map).join('|') + ')';
    var testRegexp = RegExp(source);
    var replaceRegexp = RegExp(source, 'g');
    return function(string) {
      string = string == null ? '' : '' + string;
      return testRegexp.test(string) ? string.replace(replaceRegexp, escaper) : string;
    };
  }
  var escape = createEscaper(escapeMap);
  var unescape = createEscaper(unescapeMap);

  // Traverses the children of `obj` along `path`. If a child is a function, it
  // is invoked with its parent as context. Returns the value of the final
  // child, or `fallback` if any child is undefined.
  function result(obj, path, fallback) {
    if (!isArray(path)) path = [path];
    var length = path.length;
    if (!length) {
      return isFunction(fallback) ? fallback.call(obj) : fallback;
    }
    for (var i = 0; i < length; i++) {
      var prop = obj == null ? void 0 : obj[path[i]];
      if (prop === void 0) {
        prop = fallback;
        i = length; // Ensure we don't continue iterating.
      }
      obj = isFunction(prop) ? prop.call(obj) : prop;
    }
    return obj;
  }

  // Generate a unique integer id (unique within the entire client session).
  // Useful for temporary DOM ids.
  var idCounter = 0;
  function uniqueId(prefix) {
    var id = ++idCounter + '';
    return prefix ? prefix + id : id;
  }

  // By default, Underscore uses ERB-style template delimiters, change the
  // following template settings to use alternative delimiters.
  var templateSettings = _.templateSettings = {
    evaluate: /<%([\s\S]+?)%>/g,
    interpolate: /<%=([\s\S]+?)%>/g,
    escape: /<%-([\s\S]+?)%>/g
  };

  // When customizing `templateSettings`, if you don't want to define an
  // interpolation, evaluation or escaping regex, we need one that is
  // guaranteed not to match.
  var noMatch = /(.)^/;

  // Certain characters need to be escaped so that they can be put into a
  // string literal.
  var escapes = {
    "'": "'",
    '\\': '\\',
    '\r': 'r',
    '\n': 'n',
    '\u2028': 'u2028',
    '\u2029': 'u2029'
  };

  var escapeRegExp = /\\|'|\r|\n|\u2028|\u2029/g;

  var escapeChar = function(match) {
    return '\\' + escapes[match];
  };

  // JavaScript micro-templating, similar to John Resig's implementation.
  // Underscore templating handles arbitrary delimiters, preserves whitespace,
  // and correctly escapes quotes within interpolated code.
  // NB: `oldSettings` only exists for backwards compatibility.
  function template(text, settings, oldSettings) {
    if (!settings && oldSettings) settings = oldSettings;
    settings = defaults({}, settings, _.templateSettings);

    // Combine delimiters into one regular expression via alternation.
    var matcher = RegExp([
      (settings.escape || noMatch).source,
      (settings.interpolate || noMatch).source,
      (settings.evaluate || noMatch).source
    ].join('|') + '|$', 'g');

    // Compile the template source, escaping string literals appropriately.
    var index = 0;
    var source = "__p+='";
    text.replace(matcher, function(match, escape, interpolate, evaluate, offset) {
      source += text.slice(index, offset).replace(escapeRegExp, escapeChar);
      index = offset + match.length;

      if (escape) {
        source += "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'";
      } else if (interpolate) {
        source += "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'";
      } else if (evaluate) {
        source += "';\n" + evaluate + "\n__p+='";
      }

      // Adobe VMs need the match returned to produce the correct offset.
      return match;
    });
    source += "';\n";

    // If a variable is not specified, place data values in local scope.
    if (!settings.variable) source = 'with(obj||{}){\n' + source + '}\n';

    source = "var __t,__p='',__j=Array.prototype.join," +
      "print=function(){__p+=__j.call(arguments,'');};\n" +
      source + 'return __p;\n';

    var render;
    try {
      render = new Function(settings.variable || 'obj', '_', source);
    } catch (e) {
      e.source = source;
      throw e;
    }

    var template = function(data) {
      return render.call(this, data, _);
    };

    // Provide the compiled source as a convenience for precompilation.
    var argument = settings.variable || 'obj';
    template.source = 'function(' + argument + '){\n' + source + '}';

    return template;
  }

  // Add a "chain" function. Start chaining a wrapped Underscore object.
  function chain(obj) {
    var instance = _(obj);
    instance._chain = true;
    return instance;
  }

  // OOP
  // ---------------
  // If Underscore is called as a function, it returns a wrapped object that
  // can be used OO-style. This wrapper holds altered versions of all the
  // underscore functions. Wrapped objects may be chained.

  // Helper function to continue chaining intermediate results.
  function chainResult(instance, obj) {
    return instance._chain ? _(obj).chain() : obj;
  }

  // Add your own custom functions to the Underscore object.
  function mixin(obj) {
    each(functions(obj), function(name) {
      var func = _[name] = obj[name];
      _.prototype[name] = function() {
        var args = [this._wrapped];
        push.apply(args, arguments);
        return chainResult(this, func.apply(_, args));
      };
    });
    return _;
  }

  // Add all mutator Array functions to the wrapper.
  each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
    var method = ArrayProto[name];
    _.prototype[name] = function() {
      var obj = this._wrapped;
      method.apply(obj, arguments);
      if ((name === 'shift' || name === 'splice') && obj.length === 0) delete obj[0];
      return chainResult(this, obj);
    };
  });

  // Add all accessor Array functions to the wrapper.
  each(['concat', 'join', 'slice'], function(name) {
    var method = ArrayProto[name];
    _.prototype[name] = function() {
      return chainResult(this, method.apply(this._wrapped, arguments));
    };
  });

  // Extracts the result from a wrapped and chained object.
  _.prototype.value = function() {
    return this._wrapped;
  };

  // Provide unwrapping proxy for some methods used in engine operations
  // such as arithmetic and JSON stringification.
  _.prototype.valueOf = _.prototype.toJSON = _.prototype.value;

  _.prototype.toString = function() {
    return String(this._wrapped);
  };

  var allExports = ({
    'default': _,
    VERSION: VERSION,
    iteratee: iteratee,
    restArguments: restArguments,
    each: each,
    forEach: each,
    map: map,
    collect: map,
    reduce: reduce,
    foldl: reduce,
    inject: reduce,
    reduceRight: reduceRight,
    foldr: reduceRight,
    find: find,
    detect: find,
    filter: filter,
    select: filter,
    reject: reject,
    every: every,
    all: every,
    some: some,
    any: some,
    contains: contains,
    includes: contains,
    include: contains,
    invoke: invoke,
    pluck: pluck,
    where: where,
    findWhere: findWhere,
    max: max,
    min: min,
    shuffle: shuffle,
    sample: sample,
    sortBy: sortBy,
    groupBy: groupBy,
    indexBy: indexBy,
    countBy: countBy,
    toArray: toArray,
    size: size,
    partition: partition,
    first: first,
    head: first,
    take: first,
    initial: initial,
    last: last,
    rest: rest,
    tail: rest,
    drop: rest,
    compact: compact,
    flatten: flatten,
    without: without,
    uniq: uniq,
    unique: uniq,
    union: union,
    intersection: intersection,
    difference: difference,
    unzip: unzip,
    zip: zip,
    object: object,
    findIndex: findIndex,
    findLastIndex: findLastIndex,
    sortedIndex: sortedIndex,
    indexOf: indexOf,
    lastIndexOf: lastIndexOf,
    range: range,
    chunk: chunk,
    bind: bind,
    partial: partial,
    bindAll: bindAll,
    memoize: memoize,
    delay: delay,
    defer: defer,
    throttle: throttle,
    debounce: debounce,
    wrap: wrap,
    negate: negate,
    compose: compose,
    after: after,
    before: before,
    once: once,
    keys: keys,
    allKeys: allKeys,
    values: values,
    mapObject: mapObject,
    pairs: pairs,
    invert: invert,
    functions: functions,
    methods: functions,
    extend: extend,
    extendOwn: extendOwn,
    assign: extendOwn,
    findKey: findKey,
    pick: pick,
    omit: omit,
    defaults: defaults,
    create: create,
    clone: clone,
    tap: tap,
    isMatch: isMatch,
    isEqual: isEqual,
    isEmpty: isEmpty,
    isElement: isElement,
    isArray: isArray,
    isObject: isObject,
    isArguments: isArguments,
    isFunction: isFunction,
    isString: isString,
    isNumber: isNumber,
    isDate: isDate,
    isRegExp: isRegExp,
    isError: isError,
    isSymbol: isSymbol,
    isMap: isMap,
    isWeakMap: isWeakMap,
    isSet: isSet,
    isWeakSet: isWeakSet,
    isFinite: isFinite,
    isNaN: isNaN,
    isBoolean: isBoolean,
    isNull: isNull,
    isUndefined: isUndefined,
    has: has,
    identity: identity,
    constant: constant,
    noop: noop,
    property: property,
    propertyOf: propertyOf,
    matcher: matcher,
    matches: matcher,
    times: times,
    random: random,
    now: now,
    escape: escape,
    unescape: unescape,
    result: result,
    uniqueId: uniqueId,
    templateSettings: templateSettings,
    template: template,
    chain: chain,
    mixin: mixin
  });

  // Add all of the Underscore functions to the wrapper object.
  var _$1 = mixin(allExports);
  // Legacy Node.js API
  _$1._ = _$1;

  return _$1;

})));
//# sourceMappingURL=underscore.js.map


/***/ }),

/***/ 995:
/***/ (function(__unusedmodule, exports, __webpack_require__) {

"use strict";


/**
* LICENSE MIT
* (C) Daniel Zelisko
* http://github.com/danielzzz/node-ping
*
* a simple wrapper for ping
* Now with support of not only english Windows.
*
*/

// System library
var util = __webpack_require__(669);
var cp = __webpack_require__(129);
var os = __webpack_require__(87);

// 3rd-party library
var Q = __webpack_require__(216);
var __ = __webpack_require__(891);

// Our library
var builderFactory = __webpack_require__(582);
var parserFactory = __webpack_require__(609);

/**
 * Class::PromisePing
 *
 * @param {string} addr - Hostname or ip addres
 * @param {PingConfig} config - Configuration for command ping
 * @return {Promise}
 */
function probe(addr, config) {
    // Do not reassign function argument
    var _config = config || {};

    // Convert callback base system command to promise base
    var deferred = Q.defer();

    // Spawn a ping process
    var ping = null;
    var platform = os.platform();
    try {
        var argumentBuilder = builderFactory.createBuilder(platform);
        var pingExecutablePath = builderFactory.getExecutablePath(
            platform, _config.v6
        );
        var pingArgs = argumentBuilder.getCommandArguments(addr, _config);
        var spawnOptions = argumentBuilder.getSpawnOptions();
        ping = cp.spawn(pingExecutablePath, pingArgs, spawnOptions);
    } catch (err) {
        deferred.reject(err);
        return deferred.promise;
    }

    // Initial parser
    var parser = parserFactory.createParser(platform, _config);

    // Register events from system ping
    ping.once('error', function () {
        var err = new Error(
            util.format(
                'ping.probe: %s. %s',
                'there was an error while executing the ping program. ',
                'Check the path or permissions...'
            )
        );
        deferred.reject(err);
    });

    // Cache all lines from the system ping
    var outstring = [];
    ping.stdout.on('data', function (data) {
        outstring.push(String(data));
    });

    // Parse lines we have on closing system ping
    ping.once('close', function () {
        // Merge lines we have and split it by \n
        var lines = outstring.join('').split('\n');

        // Parse line one by one
        __.each(lines, parser.eat, parser);

        // Get result
        var ret = parser.getResult();

        deferred.resolve(ret);
    });

    return deferred.promise;
}

exports.probe = probe;


/***/ })

/******/ });