First upload version 0.0.1

2026-02-05 15:27:49 +08:00
commit 8e9b7201ed
4182 changed files with 593136 additions and 0 deletions
--- a/node_modules/proper-lockfile/CHANGELOG.md
+++ b/node_modules/proper-lockfile/CHANGELOG.md
@@ -0,0 +1,108 @@
+# Change Log
+
+All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
+
+<a name="4.1.2"></a>
+## [4.1.2](https://github.com/moxystudio/node-proper-lockfile/compare/v4.1.1...v4.1.2) (2021-01-25)
+
+
+### Bug Fixes
+
+* fix node 14 updating graceful-fs ([#102](https://github.com/moxystudio/node-proper-lockfile/issues/102)) ([b0d988e](https://github.com/moxystudio/node-proper-lockfile/commit/b0d988e))
+
+
+
+<a name="4.1.1"></a>
+## [4.1.1](https://github.com/moxystudio/node-proper-lockfile/compare/v4.1.0...v4.1.1) (2019-04-03)
+
+
+### Bug Fixes
+
+* fix mtime precision on some filesystems ([#88](https://github.com/moxystudio/node-proper-lockfile/issues/88)) ([f266158](https://github.com/moxystudio/node-proper-lockfile/commit/f266158)), closes [#82](https://github.com/moxystudio/node-proper-lockfile/issues/82) [#87](https://github.com/moxystudio/node-proper-lockfile/issues/87)
+
+
+
+<a name="4.1.0"></a>
+# [4.1.0](https://github.com/moxystudio/node-proper-lockfile/compare/v4.0.0...v4.1.0) (2019-03-18)
+
+
+### Features
+
+* allow second precision in mtime comparison ([#78](https://github.com/moxystudio/node-proper-lockfile/issues/78)) ([b2816a6](https://github.com/moxystudio/node-proper-lockfile/commit/b2816a6))
+
+
+
+<a name="4.0.0"></a>
+# [4.0.0](https://github.com/moxystudio/node-proper-lockfile/compare/v3.2.0...v4.0.0) (2019-03-12)
+
+
+### Bug Fixes
+
+* fix typo in error message ([#68](https://github.com/moxystudio/node-proper-lockfile/issues/68)) ([b91cb55](https://github.com/moxystudio/node-proper-lockfile/commit/b91cb55))
+
+
+### Features
+
+* make staleness check more robust ([#74](https://github.com/moxystudio/node-proper-lockfile/issues/74)) ([9cc0973](https://github.com/moxystudio/node-proper-lockfile/commit/9cc0973)), closes [#71](https://github.com/moxystudio/node-proper-lockfile/issues/71) [/github.com/ipfs/js-ipfs-repo/issues/188#issuecomment-468682971](https://github.com//github.com/ipfs/js-ipfs-repo/issues/188/issues/issuecomment-468682971)
+
+
+### BREAKING CHANGES
+
+* We were marking the lock as compromised when system went into sleep or if the event loop was busy taking too long to run the internals timers, Now we keep track of the mtime updated by the current process, and if we lose some cycles in the update process but recover and the mtime is still ours we do not mark the lock as compromised.
+
+
+
+<a name="3.2.0"></a>
+# [3.2.0](https://github.com/moxystudio/node-proper-lockfile/compare/v3.1.0...v3.2.0) (2018-11-19)
+
+
+### Features
+
+* add lock path option ([#66](https://github.com/moxystudio/node-proper-lockfile/issues/66)) ([32f1b8d](https://github.com/moxystudio/node-proper-lockfile/commit/32f1b8d))
+
+
+
+<a name="3.1.0"></a>
+# [3.1.0](https://github.com/moxystudio/node-proper-lockfile/compare/v3.0.2...v3.1.0) (2018-11-15)
+
+
+### Bug Fixes
+
+* **package:** update retry to version 0.12.0 ([#50](https://github.com/moxystudio/node-proper-lockfile/issues/50)) ([d400b98](https://github.com/moxystudio/node-proper-lockfile/commit/d400b98))
+
+
+### Features
+
+* add signal exit ([#65](https://github.com/moxystudio/node-proper-lockfile/issues/65)) ([f20bc45](https://github.com/moxystudio/node-proper-lockfile/commit/f20bc45))
+
+
+
+<a name="3.0.2"></a>
+## [3.0.2](https://github.com/moxystudio/node-proper-lockfile/compare/v3.0.1...v3.0.2) (2018-01-30)
+
+
+
+<a name="3.0.1"></a>
+## [3.0.1](https://github.com/moxystudio/node-proper-lockfile/compare/v3.0.0...v3.0.1) (2018-01-20)
+
+
+### Bug Fixes
+
+* restore ability to use lockfile() directly ([0ef8fbc](https://github.com/moxystudio/node-proper-lockfile/commit/0ef8fbc))
+
+
+
+<a name="3.0.0"></a>
+# [3.0.0](https://github.com/moxystudio/node-proper-lockfile/compare/v2.0.1...v3.0.0) (2018-01-20)
+
+
+### Chores
+
+* update project to latest node lts ([b1d43e5](https://github.com/moxystudio/node-proper-lockfile/commit/b1d43e5))
+
+
+### BREAKING CHANGES
+
+* remove callback support
+* use of node lts language features such as object spread
+* compromised function in lock() has been moved to an option
--- a/node_modules/proper-lockfile/LICENSE
+++ b/node_modules/proper-lockfile/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2018 Made With MOXY Lda <hello@moxy.studio>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/node_modules/proper-lockfile/README.md
+++ b/node_modules/proper-lockfile/README.md
@@ -0,0 +1,183 @@
+# proper-lockfile
+
+[![NPM version][npm-image]][npm-url] [![Downloads][downloads-image]][npm-url] [![Build Status][travis-image]][travis-url] [![Coverage Status][codecov-image]][codecov-url] [![Dependency status][david-dm-image]][david-dm-url] [![Dev Dependency status][david-dm-dev-image]][david-dm-dev-url]
+
+[npm-url]:https://npmjs.org/package/proper-lockfile
+[downloads-image]:https://img.shields.io/npm/dm/proper-lockfile.svg
+[npm-image]:https://img.shields.io/npm/v/proper-lockfile.svg
+[travis-url]:https://travis-ci.org/moxystudio/node-proper-lockfile
+[travis-image]:https://img.shields.io/travis/moxystudio/node-proper-lockfile/master.svg
+[codecov-url]:https://codecov.io/gh/moxystudio/node-proper-lockfile
+[codecov-image]:https://img.shields.io/codecov/c/github/moxystudio/node-proper-lockfile/master.svg
+[david-dm-url]:https://david-dm.org/moxystudio/node-proper-lockfile
+[david-dm-image]:https://img.shields.io/david/moxystudio/node-proper-lockfile.svg
+[david-dm-dev-url]:https://david-dm.org/moxystudio/node-proper-lockfile?type=dev
+[david-dm-dev-image]:https://img.shields.io/david/dev/moxystudio/node-proper-lockfile.svg
+
+An inter-process and inter-machine lockfile utility that works on a local or network file system.
+
+
+## Installation
+
+`$ npm install proper-lockfile`
+
+
+## Design
+
+There are various ways to achieve [file locking](http://en.wikipedia.org/wiki/File_locking).
+
+This library utilizes the `mkdir` strategy which works atomically on any kind of file system, even network based ones.
+The lockfile path is based on the file path you are trying to lock by suffixing it with `.lock`.
+
+When a lock is successfully acquired, the lockfile's `mtime` (modified time) is periodically updated to prevent staleness. This allows to effectively check if a lock is stale by checking its `mtime` against a stale threshold. If the update of the mtime fails several times, the lock might be compromised. The `mtime` is [supported](http://en.wikipedia.org/wiki/Comparison_of_file_systems) in almost every `filesystem`.
+
+
+### Comparison
+
+This library is similar to [lockfile](https://github.com/isaacs/lockfile) but the latter has some drawbacks:
+
+- It relies on `open` with `O_EXCL` flag which has problems in network file systems. `proper-lockfile` uses `mkdir` which doesn't have this issue.
+
+> O_EXCL is broken on NFS file systems; programs which rely on it for performing locking tasks will contain a race condition.
+
+- The lockfile staleness check is done via `ctime` (creation time) which is unsuitable for long running processes. `proper-lockfile` constantly updates lockfiles `mtime` to do proper staleness check.
+
+- It does not check if the lockfile was compromised which can lead to undesirable situations. `proper-lockfile` checks the lockfile when updating the `mtime`.
+
+- It has a default value of `0` for the stale option which isn't good because any crash or process kill that the package can't handle gracefully will leave the lock active forever.
+
+
+### Compromised
+
+`proper-lockfile` does not detect cases in which:
+
+- A `lockfile` is manually removed and someone else acquires the lock right after
+- Different `stale`/`update` values are being used for the same file, possibly causing two locks to be acquired on the same file
+
+`proper-lockfile` detects cases in which:
+
+- Updates to the `lockfile` fail
+- Updates take longer than expected, possibly causing the lock to become stale for a certain amount of time
+
+
+As you see, the first two are a consequence of bad usage. Technically, it was possible to detect the first two but it would introduce complexity and eventual race conditions.
+
+
+## Usage
+
+### .lock(file, [options])
+
+Tries to acquire a lock on `file` or rejects the promise on error.
+
+If the lock succeeds, a `release` function is provided that should be called when you want to release the lock. The `release` function also rejects the promise on error (e.g. when the lock was already compromised).
+
+Available options:
+
+- `stale`: Duration in milliseconds in which the lock is considered stale, defaults to `10000` (minimum value is `5000`)
+- `update`: The interval in milliseconds in which the lockfile's `mtime` will be updated, defaults to `stale/2` (minimum value is `1000`, maximum value is `stale/2`)
+- `retries`: The number of retries or a [retry](https://www.npmjs.org/package/retry) options object, defaults to `0`
+- `realpath`: Resolve symlinks using realpath, defaults to `true` (note that if `true`, the `file` must exist previously)
+- `fs`: A custom fs to use, defaults to `graceful-fs`
+- `onCompromised`: Called if the lock gets compromised, defaults to a function that simply throws the error which will probably cause the process to die
+- `lockfilePath`: Custom lockfile path. e.g.: If you want to lock a directory and create the lock file inside it, you can pass `file` as `<dir path>` and `options.lockfilePath` as `<dir path>/dir.lock`
+
+
+```js
+const lockfile = require('proper-lockfile');
+
+lockfile.lock('some/file')
+.then((release) => {
+    // Do something while the file is locked
+
+    // Call the provided release function when you're done,
+    // which will also return a promise
+    return release();
+})
+.catch((e) => {
+    // either lock could not be acquired
+    // or releasing it failed
+    console.error(e)
+});
+
+// Alternatively, you may use lockfile('some/file') directly.
+```
+
+
+### .unlock(file, [options])
+
+Releases a previously acquired lock on `file` or rejects the promise on error.
+
+Whenever possible you should use the `release` function instead (as exemplified above). Still there are cases in which it's hard to keep a reference to it around code. In those cases `unlock()` might be handy.
+
+Available options:
+
+- `realpath`: Resolve symlinks using realpath, defaults to `true` (note that if `true`, the `file` must exist previously)
+- `fs`: A custom fs to use, defaults to `graceful-fs`
+- `lockfilePath`: Custom lockfile path. e.g.: If you want to lock a directory and create the lock file inside it, you can pass `file` as `<dir path>` and `options.lockfilePath` as `<dir path>/dir.lock`
+
+
+```js
+const lockfile = require('proper-lockfile');
+
+lockfile.lock('some/file')
+.then(() => {
+    // Do something while the file is locked
+
+    // Later..
+    return lockfile.unlock('some/file');
+});
+```
+
+### .check(file, [options])
+
+Check if the file is locked and its lockfile is not stale, rejects the promise on error.
+
+Available options:
+
+- `stale`: Duration in milliseconds in which the lock is considered stale, defaults to `10000` (minimum value is `5000`)
+- `realpath`: Resolve symlinks using realpath, defaults to `true` (note that if `true`, the `file` must exist previously)
+- `fs`: A custom fs to use, defaults to `graceful-fs`
+- `lockfilePath`: Custom lockfile path. e.g.: If you want to lock a directory and create the lock file inside it, you can pass `file` as `<dir path>` and `options.lockfilePath` as `<dir path>/dir.lock`
+
+
+```js
+const lockfile = require('proper-lockfile');
+
+lockfile.check('some/file')
+.then((isLocked) => {
+    // isLocked will be true if 'some/file' is locked, false otherwise
+});
+```
+
+### .lockSync(file, [options])
+
+Sync version of `.lock()`.   
+Returns the `release` function or throws on error.
+
+### .unlockSync(file, [options])
+
+Sync version of `.unlock()`.   
+Throws on error.
+
+### .checkSync(file, [options])
+
+Sync version of `.check()`.
+Returns a boolean or throws on error.
+
+
+## Graceful exit
+
+`proper-lockfile` automatically removes locks if the process exits, except if the process is killed with SIGKILL or it crashes due to a VM fatal error (e.g.: out of memory).
+
+
+## Tests
+
+`$ npm test`   
+`$ npm test -- --watch` during development
+
+The test suite is very extensive. There's even a stress test to guarantee exclusiveness of locks.
+
+
+## License
+
+Released under the [MIT License](https://www.opensource.org/licenses/mit-license.php).
--- a/node_modules/proper-lockfile/index.js
+++ b/node_modules/proper-lockfile/index.js
@@ -0,0 +1,40 @@
+'use strict';
+
+const lockfile = require('./lib/lockfile');
+const { toPromise, toSync, toSyncOptions } = require('./lib/adapter');
+
+async function lock(file, options) {
+    const release = await toPromise(lockfile.lock)(file, options);
+
+    return toPromise(release);
+}
+
+function lockSync(file, options) {
+    const release = toSync(lockfile.lock)(file, toSyncOptions(options));
+
+    return toSync(release);
+}
+
+function unlock(file, options) {
+    return toPromise(lockfile.unlock)(file, options);
+}
+
+function unlockSync(file, options) {
+    return toSync(lockfile.unlock)(file, toSyncOptions(options));
+}
+
+function check(file, options) {
+    return toPromise(lockfile.check)(file, options);
+}
+
+function checkSync(file, options) {
+    return toSync(lockfile.check)(file, toSyncOptions(options));
+}
+
+module.exports = lock;
+module.exports.lock = lock;
+module.exports.unlock = unlock;
+module.exports.lockSync = lockSync;
+module.exports.unlockSync = unlockSync;
+module.exports.check = check;
+module.exports.checkSync = checkSync;
--- a/node_modules/proper-lockfile/lib/adapter.js
+++ b/node_modules/proper-lockfile/lib/adapter.js
@@ -0,0 +1,85 @@
+'use strict';
+
+const fs = require('graceful-fs');
+
+function createSyncFs(fs) {
+    const methods = ['mkdir', 'realpath', 'stat', 'rmdir', 'utimes'];
+    const newFs = { ...fs };
+
+    methods.forEach((method) => {
+        newFs[method] = (...args) => {
+            const callback = args.pop();
+            let ret;
+
+            try {
+                ret = fs[`${method}Sync`](...args);
+            } catch (err) {
+                return callback(err);
+            }
+
+            callback(null, ret);
+        };
+    });
+
+    return newFs;
+}
+
+// ----------------------------------------------------------
+
+function toPromise(method) {
+    return (...args) => new Promise((resolve, reject) => {
+        args.push((err, result) => {
+            if (err) {
+                reject(err);
+            } else {
+                resolve(result);
+            }
+        });
+
+        method(...args);
+    });
+}
+
+function toSync(method) {
+    return (...args) => {
+        let err;
+        let result;
+
+        args.push((_err, _result) => {
+            err = _err;
+            result = _result;
+        });
+
+        method(...args);
+
+        if (err) {
+            throw err;
+        }
+
+        return result;
+    };
+}
+
+function toSyncOptions(options) {
+    // Shallow clone options because we are oging to mutate them
+    options = { ...options };
+
+    // Transform fs to use the sync methods instead
+    options.fs = createSyncFs(options.fs || fs);
+
+    // Retries are not allowed because it requires the flow to be sync
+    if (
+        (typeof options.retries === 'number' && options.retries > 0) ||
+        (options.retries && typeof options.retries.retries === 'number' && options.retries.retries > 0)
+    ) {
+        throw Object.assign(new Error('Cannot use retries with the sync api'), { code: 'ESYNC' });
+    }
+
+    return options;
+}
+
+module.exports = {
+    toPromise,
+    toSync,
+    toSyncOptions,
+};
--- a/node_modules/proper-lockfile/lib/lockfile.js
+++ b/node_modules/proper-lockfile/lib/lockfile.js
@@ -0,0 +1,342 @@
+'use strict';
+
+const path = require('path');
+const fs = require('graceful-fs');
+const retry = require('retry');
+const onExit = require('signal-exit');
+const mtimePrecision = require('./mtime-precision');
+
+const locks = {};
+
+function getLockFile(file, options) {
+    return options.lockfilePath || `${file}.lock`;
+}
+
+function resolveCanonicalPath(file, options, callback) {
+    if (!options.realpath) {
+        return callback(null, path.resolve(file));
+    }
+
+    // Use realpath to resolve symlinks
+    // It also resolves relative paths
+    options.fs.realpath(file, callback);
+}
+
+function acquireLock(file, options, callback) {
+    const lockfilePath = getLockFile(file, options);
+
+    // Use mkdir to create the lockfile (atomic operation)
+    options.fs.mkdir(lockfilePath, (err) => {
+        if (!err) {
+            // At this point, we acquired the lock!
+            // Probe the mtime precision
+            return mtimePrecision.probe(lockfilePath, options.fs, (err, mtime, mtimePrecision) => {
+                // If it failed, try to remove the lock..
+                /* istanbul ignore if */
+                if (err) {
+                    options.fs.rmdir(lockfilePath, () => {});
+
+                    return callback(err);
+                }
+
+                callback(null, mtime, mtimePrecision);
+            });
+        }
+
+        // If error is not EEXIST then some other error occurred while locking
+        if (err.code !== 'EEXIST') {
+            return callback(err);
+        }
+
+        // Otherwise, check if lock is stale by analyzing the file mtime
+        if (options.stale <= 0) {
+            return callback(Object.assign(new Error('Lock file is already being held'), { code: 'ELOCKED', file }));
+        }
+
+        options.fs.stat(lockfilePath, (err, stat) => {
+            if (err) {
+                // Retry if the lockfile has been removed (meanwhile)
+                // Skip stale check to avoid recursiveness
+                if (err.code === 'ENOENT') {
+                    return acquireLock(file, { ...options, stale: 0 }, callback);
+                }
+
+                return callback(err);
+            }
+
+            if (!isLockStale(stat, options)) {
+                return callback(Object.assign(new Error('Lock file is already being held'), { code: 'ELOCKED', file }));
+            }
+
+            // If it's stale, remove it and try again!
+            // Skip stale check to avoid recursiveness
+            removeLock(file, options, (err) => {
+                if (err) {
+                    return callback(err);
+                }
+
+                acquireLock(file, { ...options, stale: 0 }, callback);
+            });
+        });
+    });
+}
+
+function isLockStale(stat, options) {
+    return stat.mtime.getTime() < Date.now() - options.stale;
+}
+
+function removeLock(file, options, callback) {
+    // Remove lockfile, ignoring ENOENT errors
+    options.fs.rmdir(getLockFile(file, options), (err) => {
+        if (err && err.code !== 'ENOENT') {
+            return callback(err);
+        }
+
+        callback();
+    });
+}
+
+function updateLock(file, options) {
+    const lock = locks[file];
+
+    // Just for safety, should never happen
+    /* istanbul ignore if */
+    if (lock.updateTimeout) {
+        return;
+    }
+
+    lock.updateDelay = lock.updateDelay || options.update;
+    lock.updateTimeout = setTimeout(() => {
+        lock.updateTimeout = null;
+
+        // Stat the file to check if mtime is still ours
+        // If it is, we can still recover from a system sleep or a busy event loop
+        options.fs.stat(lock.lockfilePath, (err, stat) => {
+            const isOverThreshold = lock.lastUpdate + options.stale < Date.now();
+
+            // If it failed to update the lockfile, keep trying unless
+            // the lockfile was deleted or we are over the threshold
+            if (err) {
+                if (err.code === 'ENOENT' || isOverThreshold) {
+                    return setLockAsCompromised(file, lock, Object.assign(err, { code: 'ECOMPROMISED' }));
+                }
+
+                lock.updateDelay = 1000;
+
+                return updateLock(file, options);
+            }
+
+            const isMtimeOurs = lock.mtime.getTime() === stat.mtime.getTime();
+
+            if (!isMtimeOurs) {
+                return setLockAsCompromised(
+                    file,
+                    lock,
+                    Object.assign(
+                        new Error('Unable to update lock within the stale threshold'),
+                        { code: 'ECOMPROMISED' }
+                    ));
+            }
+
+            const mtime = mtimePrecision.getMtime(lock.mtimePrecision);
+
+            options.fs.utimes(lock.lockfilePath, mtime, mtime, (err) => {
+                const isOverThreshold = lock.lastUpdate + options.stale < Date.now();
+
+                // Ignore if the lock was released
+                if (lock.released) {
+                    return;
+                }
+
+                // If it failed to update the lockfile, keep trying unless
+                // the lockfile was deleted or we are over the threshold
+                if (err) {
+                    if (err.code === 'ENOENT' || isOverThreshold) {
+                        return setLockAsCompromised(file, lock, Object.assign(err, { code: 'ECOMPROMISED' }));
+                    }
+
+                    lock.updateDelay = 1000;
+
+                    return updateLock(file, options);
+                }
+
+                // All ok, keep updating..
+                lock.mtime = mtime;
+                lock.lastUpdate = Date.now();
+                lock.updateDelay = null;
+                updateLock(file, options);
+            });
+        });
+    }, lock.updateDelay);
+
+    // Unref the timer so that the nodejs process can exit freely
+    // This is safe because all acquired locks will be automatically released
+    // on process exit
+
+    // We first check that `lock.updateTimeout.unref` exists because some users
+    // may be using this module outside of NodeJS (e.g., in an electron app),
+    // and in those cases `setTimeout` return an integer.
+    /* istanbul ignore else */
+    if (lock.updateTimeout.unref) {
+        lock.updateTimeout.unref();
+    }
+}
+
+function setLockAsCompromised(file, lock, err) {
+    // Signal the lock has been released
+    lock.released = true;
+
+    // Cancel lock mtime update
+    // Just for safety, at this point updateTimeout should be null
+    /* istanbul ignore if */
+    if (lock.updateTimeout) {
+        clearTimeout(lock.updateTimeout);
+    }
+
+    if (locks[file] === lock) {
+        delete locks[file];
+    }
+
+    lock.options.onCompromised(err);
+}
+
+// ----------------------------------------------------------
+
+function lock(file, options, callback) {
+    /* istanbul ignore next */
+    options = {
+        stale: 10000,
+        update: null,
+        realpath: true,
+        retries: 0,
+        fs,
+        onCompromised: (err) => { throw err; },
+        ...options,
+    };
+
+    options.retries = options.retries || 0;
+    options.retries = typeof options.retries === 'number' ? { retries: options.retries } : options.retries;
+    options.stale = Math.max(options.stale || 0, 2000);
+    options.update = options.update == null ? options.stale / 2 : options.update || 0;
+    options.update = Math.max(Math.min(options.update, options.stale / 2), 1000);
+
+    // Resolve to a canonical file path
+    resolveCanonicalPath(file, options, (err, file) => {
+        if (err) {
+            return callback(err);
+        }
+
+        // Attempt to acquire the lock
+        const operation = retry.operation(options.retries);
+
+        operation.attempt(() => {
+            acquireLock(file, options, (err, mtime, mtimePrecision) => {
+                if (operation.retry(err)) {
+                    return;
+                }
+
+                if (err) {
+                    return callback(operation.mainError());
+                }
+
+                // We now own the lock
+                const lock = locks[file] = {
+                    lockfilePath: getLockFile(file, options),
+                    mtime,
+                    mtimePrecision,
+                    options,
+                    lastUpdate: Date.now(),
+                };
+
+                // We must keep the lock fresh to avoid staleness
+                updateLock(file, options);
+
+                callback(null, (releasedCallback) => {
+                    if (lock.released) {
+                        return releasedCallback &&
+                            releasedCallback(Object.assign(new Error('Lock is already released'), { code: 'ERELEASED' }));
+                    }
+
+                    // Not necessary to use realpath twice when unlocking
+                    unlock(file, { ...options, realpath: false }, releasedCallback);
+                });
+            });
+        });
+    });
+}
+
+function unlock(file, options, callback) {
+    options = {
+        fs,
+        realpath: true,
+        ...options,
+    };
+
+    // Resolve to a canonical file path
+    resolveCanonicalPath(file, options, (err, file) => {
+        if (err) {
+            return callback(err);
+        }
+
+        // Skip if the lock is not acquired
+        const lock = locks[file];
+
+        if (!lock) {
+            return callback(Object.assign(new Error('Lock is not acquired/owned by you'), { code: 'ENOTACQUIRED' }));
+        }
+
+        lock.updateTimeout && clearTimeout(lock.updateTimeout); // Cancel lock mtime update
+        lock.released = true; // Signal the lock has been released
+        delete locks[file]; // Delete from locks
+
+        removeLock(file, options, callback);
+    });
+}
+
+function check(file, options, callback) {
+    options = {
+        stale: 10000,
+        realpath: true,
+        fs,
+        ...options,
+    };
+
+    options.stale = Math.max(options.stale || 0, 2000);
+
+    // Resolve to a canonical file path
+    resolveCanonicalPath(file, options, (err, file) => {
+        if (err) {
+            return callback(err);
+        }
+
+        // Check if lockfile exists
+        options.fs.stat(getLockFile(file, options), (err, stat) => {
+            if (err) {
+                // If does not exist, file is not locked. Otherwise, callback with error
+                return err.code === 'ENOENT' ? callback(null, false) : callback(err);
+            }
+
+            // Otherwise, check if lock is stale by analyzing the file mtime
+            return callback(null, !isLockStale(stat, options));
+        });
+    });
+}
+
+function getLocks() {
+    return locks;
+}
+
+// Remove acquired locks on exit
+/* istanbul ignore next */
+onExit(() => {
+    for (const file in locks) {
+        const options = locks[file].options;
+
+        try { options.fs.rmdirSync(getLockFile(file, options)); } catch (e) { /* Empty */ }
+    }
+});
+
+module.exports.lock = lock;
+module.exports.unlock = unlock;
+module.exports.check = check;
+module.exports.getLocks = getLocks;
--- a/node_modules/proper-lockfile/lib/mtime-precision.js
+++ b/node_modules/proper-lockfile/lib/mtime-precision.js
@@ -0,0 +1,55 @@
+'use strict';
+
+const cacheSymbol = Symbol();
+
+function probe(file, fs, callback) {
+    const cachedPrecision = fs[cacheSymbol];
+
+    if (cachedPrecision) {
+        return fs.stat(file, (err, stat) => {
+            /* istanbul ignore if */
+            if (err) {
+                return callback(err);
+            }
+
+            callback(null, stat.mtime, cachedPrecision);
+        });
+    }
+
+    // Set mtime by ceiling Date.now() to seconds + 5ms so that it's "not on the second"
+    const mtime = new Date((Math.ceil(Date.now() / 1000) * 1000) + 5);
+
+    fs.utimes(file, mtime, mtime, (err) => {
+        /* istanbul ignore if */
+        if (err) {
+            return callback(err);
+        }
+
+        fs.stat(file, (err, stat) => {
+            /* istanbul ignore if */
+            if (err) {
+                return callback(err);
+            }
+
+            const precision = stat.mtime.getTime() % 1000 === 0 ? 's' : 'ms';
+
+            // Cache the precision in a non-enumerable way
+            Object.defineProperty(fs, cacheSymbol, { value: precision });
+
+            callback(null, stat.mtime, precision);
+        });
+    });
+}
+
+function getMtime(precision) {
+    let now = Date.now();
+
+    if (precision === 's') {
+        now = Math.ceil(now / 1000) * 1000;
+    }
+
+    return new Date(now);
+}
+
+module.exports.probe = probe;
+module.exports.getMtime = getMtime;
--- a/node_modules/proper-lockfile/node_modules/retry/.npmignore
+++ b/node_modules/proper-lockfile/node_modules/retry/.npmignore
@@ -0,0 +1,3 @@
+/node_modules/*
+npm-debug.log
+coverage
--- a/node_modules/proper-lockfile/node_modules/retry/.travis.yml
+++ b/node_modules/proper-lockfile/node_modules/retry/.travis.yml
@@ -0,0 +1,15 @@
+language: node_js
+node_js:
+  - "4"
+before_install:
+  - pip install --user codecov
+after_success:
+  - codecov --file coverage/lcov.info --disable search
+# travis encrypt [subdomain]:[api token]@[room id]
+# notifications:
+#   email: false
+#   campfire:
+#     rooms:
+#       secure: xyz
+#     on_failure: always
+#     on_success: always
--- a/node_modules/proper-lockfile/node_modules/retry/License
+++ b/node_modules/proper-lockfile/node_modules/retry/License
@@ -0,0 +1,21 @@
+Copyright (c) 2011:
+Tim Koschützki (tim@debuggable.com)
+Felix Geisendörfer (felix@debuggable.com)
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
--- a/node_modules/proper-lockfile/node_modules/retry/Makefile
+++ b/node_modules/proper-lockfile/node_modules/retry/Makefile
@@ -0,0 +1,18 @@
+SHELL := /bin/bash
+
+release-major: test
+	npm version major -m "Release %s"
+	git push
+	npm publish
+
+release-minor: test
+	npm version minor -m "Release %s"
+	git push
+	npm publish
+
+release-patch: test
+	npm version patch -m "Release %s"
+	git push
+	npm publish
+
+.PHONY: test release-major release-minor release-patch
--- a/node_modules/proper-lockfile/node_modules/retry/README.md
+++ b/node_modules/proper-lockfile/node_modules/retry/README.md
@@ -0,0 +1,227 @@
+<!-- badges/ -->
+[![Build Status](https://secure.travis-ci.org/tim-kos/node-retry.png?branch=master)](http://travis-ci.org/tim-kos/node-retry "Check this project's build status on TravisCI")
+[![codecov](https://codecov.io/gh/tim-kos/node-retry/branch/master/graph/badge.svg)](https://codecov.io/gh/tim-kos/node-retry)
+<!-- /badges -->
+
+# retry
+
+Abstraction for exponential and custom retry strategies for failed operations.
+
+## Installation
+
+    npm install retry
+
+## Current Status
+
+This module has been tested and is ready to be used.
+
+## Tutorial
+
+The example below will retry a potentially failing `dns.resolve` operation
+`10` times using an exponential backoff strategy. With the default settings, this
+means the last attempt is made after `17 minutes and 3 seconds`.
+
+``` javascript
+var dns = require('dns');
+var retry = require('retry');
+
+function faultTolerantResolve(address, cb) {
+  var operation = retry.operation();
+
+  operation.attempt(function(currentAttempt) {
+    dns.resolve(address, function(err, addresses) {
+      if (operation.retry(err)) {
+        return;
+      }
+
+      cb(err ? operation.mainError() : null, addresses);
+    });
+  });
+}
+
+faultTolerantResolve('nodejs.org', function(err, addresses) {
+  console.log(err, addresses);
+});
+```
+
+Of course you can also configure the factors that go into the exponential
+backoff. See the API documentation below for all available settings.
+currentAttempt is an int representing the number of attempts so far.
+
+``` javascript
+var operation = retry.operation({
+  retries: 5,
+  factor: 3,
+  minTimeout: 1 * 1000,
+  maxTimeout: 60 * 1000,
+  randomize: true,
+});
+```
+
+## API
+
+### retry.operation([options])
+
+Creates a new `RetryOperation` object. `options` is the same as `retry.timeouts()`'s `options`, with two additions:
+
+* `forever`: Whether to retry forever, defaults to `false`.
+* `unref`: Whether to [unref](https://nodejs.org/api/timers.html#timers_unref) the setTimeout's, defaults to `false`.
+* `maxRetryTime`: The maximum time (in milliseconds) that the retried operation is allowed to run. Default is `Infinity`.  
+
+### retry.timeouts([options])
+
+Returns an array of timeouts. All time `options` and return values are in
+milliseconds. If `options` is an array, a copy of that array is returned.
+
+`options` is a JS object that can contain any of the following keys:
+
+* `retries`: The maximum amount of times to retry the operation. Default is `10`. Seting this to `1` means `do it once, then retry it once`.
+* `factor`: The exponential factor to use. Default is `2`.
+* `minTimeout`: The number of milliseconds before starting the first retry. Default is `1000`.
+* `maxTimeout`: The maximum number of milliseconds between two retries. Default is `Infinity`.
+* `randomize`: Randomizes the timeouts by multiplying with a factor between `1` to `2`. Default is `false`.
+
+The formula used to calculate the individual timeouts is:
+
+```
+Math.min(random * minTimeout * Math.pow(factor, attempt), maxTimeout)
+```
+
+Have a look at [this article][article] for a better explanation of approach.
+
+If you want to tune your `factor` / `times` settings to attempt the last retry
+after a certain amount of time, you can use wolfram alpha. For example in order
+to tune for `10` attempts in `5 minutes`, you can use this equation:
+
+![screenshot](https://github.com/tim-kos/node-retry/raw/master/equation.gif)
+
+Explaining the various values from left to right:
+
+* `k = 0 ... 9`:  The `retries` value (10)
+* `1000`: The `minTimeout` value in ms (1000)
+* `x^k`: No need to change this, `x` will be your resulting factor
+* `5 * 60 * 1000`: The desired total amount of time for retrying in ms (5 minutes)
+
+To make this a little easier for you, use wolfram alpha to do the calculations:
+
+<http://www.wolframalpha.com/input/?i=Sum%5B1000*x^k%2C+{k%2C+0%2C+9}%5D+%3D+5+*+60+*+1000>
+
+[article]: http://dthain.blogspot.com/2009/02/exponential-backoff-in-distributed.html
+
+### retry.createTimeout(attempt, opts)
+
+Returns a new `timeout` (integer in milliseconds) based on the given parameters.
+
+`attempt` is an integer representing for which retry the timeout should be calculated. If your retry operation was executed 4 times you had one attempt and 3 retries. If you then want to calculate a new timeout, you should set `attempt` to 4 (attempts are zero-indexed).
+
+`opts` can include `factor`, `minTimeout`, `randomize` (boolean) and `maxTimeout`. They are documented above.
+
+`retry.createTimeout()` is used internally by `retry.timeouts()` and is public for you to be able to create your own timeouts for reinserting an item, see [issue #13](https://github.com/tim-kos/node-retry/issues/13).
+
+### retry.wrap(obj, [options], [methodNames])
+
+Wrap all functions of the `obj` with retry. Optionally you can pass operation options and
+an array of method names which need to be wrapped.
+
+```
+retry.wrap(obj)
+
+retry.wrap(obj, ['method1', 'method2'])
+
+retry.wrap(obj, {retries: 3})
+
+retry.wrap(obj, {retries: 3}, ['method1', 'method2'])
+```
+The `options` object can take any options that the usual call to `retry.operation` can take.
+
+### new RetryOperation(timeouts, [options])
+
+Creates a new `RetryOperation` where `timeouts` is an array where each value is
+a timeout given in milliseconds.
+
+Available options:
+* `forever`: Whether to retry forever, defaults to `false`.
+* `unref`: Wether to [unref](https://nodejs.org/api/timers.html#timers_unref) the setTimeout's, defaults to `false`.
+
+If `forever` is true, the following changes happen:
+* `RetryOperation.errors()` will only output an array of one item: the last error.
+* `RetryOperation` will repeatedly use the `timeouts` array. Once all of its timeouts have been used up, it restarts with the first timeout, then uses the second and so on.
+
+#### retryOperation.errors()
+
+Returns an array of all errors that have been passed to `retryOperation.retry()` so far. The
+returning array has the errors ordered chronologically based on when they were passed to
+`retryOperation.retry()`, which means the first passed error is at index zero and the last is
+at the last index.
+
+#### retryOperation.mainError()
+
+A reference to the error object that occured most frequently. Errors are
+compared using the `error.message` property.
+
+If multiple error messages occured the same amount of time, the last error
+object with that message is returned.
+
+If no errors occured so far, the value is `null`.
+
+#### retryOperation.attempt(fn, timeoutOps)
+
+Defines the function `fn` that is to be retried and executes it for the first
+time right away. The `fn` function can receive an optional `currentAttempt` callback that represents the number of attempts to execute `fn` so far.
+
+Optionally defines `timeoutOps` which is an object having a property `timeout` in miliseconds and a property `cb` callback function.
+Whenever your retry operation takes longer than `timeout` to execute, the timeout callback function `cb` is called.
+
+
+#### retryOperation.try(fn)
+
+This is an alias for `retryOperation.attempt(fn)`. This is deprecated. Please use `retryOperation.attempt(fn)` instead.
+
+#### retryOperation.start(fn)
+
+This is an alias for `retryOperation.attempt(fn)`. This is deprecated. Please use `retryOperation.attempt(fn)` instead.
+
+#### retryOperation.retry(error)
+
+Returns `false` when no `error` value is given, or the maximum amount of retries
+has been reached.
+
+Otherwise it returns `true`, and retries the operation after the timeout for
+the current attempt number.
+
+#### retryOperation.stop()
+
+Allows you to stop the operation being retried. Useful for aborting the operation on a fatal error etc.
+
+#### retryOperation.reset()
+
+Resets the internal state of the operation object, so that you can call `attempt()` again as if this was a new operation object.
+
+#### retryOperation.attempts()
+
+Returns an int representing the number of attempts it took to call `fn` before it was successful.
+
+## License
+
+retry is licensed under the MIT license.
+
+
+# Changelog
+
+0.10.0 Adding `stop` functionality, thanks to @maxnachlinger.
+
+0.9.0 Adding `unref` functionality, thanks to @satazor.
+
+0.8.0 Implementing retry.wrap.
+
+0.7.0 Some bug fixes and made retry.createTimeout() public. Fixed issues [#10](https://github.com/tim-kos/node-retry/issues/10), [#12](https://github.com/tim-kos/node-retry/issues/12), and [#13](https://github.com/tim-kos/node-retry/issues/13).
+
+0.6.0 Introduced optional timeOps parameter for the attempt() function which is an object having a property timeout in milliseconds and a property cb callback function. Whenever your retry operation takes longer than timeout to execute, the timeout callback function cb is called.
+
+0.5.0 Some minor refactoring.
+
+0.4.0 Changed retryOperation.try() to retryOperation.attempt(). Deprecated the aliases start() and try() for it.
+
+0.3.0 Added retryOperation.start() which is an alias for retryOperation.try().
+
+0.2.0 Added attempts() function and parameter to retryOperation.try() representing the number of attempts it took to call fn().
--- a/node_modules/proper-lockfile/node_modules/retry/equation.gif
+++ b/node_modules/proper-lockfile/node_modules/retry/equation.gif
--- a/node_modules/proper-lockfile/node_modules/retry/example/dns.js
+++ b/node_modules/proper-lockfile/node_modules/retry/example/dns.js
@@ -0,0 +1,31 @@
+var dns = require('dns');
+var retry = require('../lib/retry');
+
+function faultTolerantResolve(address, cb) {
+  var opts = {
+    retries: 2,
+    factor: 2,
+    minTimeout: 1 * 1000,
+    maxTimeout: 2 * 1000,
+    randomize: true
+  };
+  var operation = retry.operation(opts);
+
+  operation.attempt(function(currentAttempt) {
+    dns.resolve(address, function(err, addresses) {
+      if (operation.retry(err)) {
+        return;
+      }
+
+      cb(operation.mainError(), operation.errors(), addresses);
+    });
+  });
+}
+
+faultTolerantResolve('nodejs.org', function(err, errors, addresses) {
+  console.warn('err:');
+  console.log(err);
+
+  console.warn('addresses:');
+  console.log(addresses);
+});
--- a/node_modules/proper-lockfile/node_modules/retry/example/stop.js
+++ b/node_modules/proper-lockfile/node_modules/retry/example/stop.js
@@ -0,0 +1,40 @@
+var retry = require('../lib/retry');
+
+function attemptAsyncOperation(someInput, cb) {
+  var opts = {
+    retries: 2,
+    factor: 2,
+    minTimeout: 1 * 1000,
+    maxTimeout: 2 * 1000,
+    randomize: true
+  };
+  var operation = retry.operation(opts);
+
+  operation.attempt(function(currentAttempt) {
+    failingAsyncOperation(someInput, function(err, result) {
+
+      if (err && err.message === 'A fatal error') {
+        operation.stop();
+        return cb(err);
+      }
+
+      if (operation.retry(err)) {
+        return;
+      }
+
+      cb(operation.mainError(), operation.errors(), result);
+    });
+  });
+}
+
+attemptAsyncOperation('test input', function(err, errors, result) {
+  console.warn('err:');
+  console.log(err);
+
+  console.warn('result:');
+  console.log(result);
+});
+
+function failingAsyncOperation(input, cb) {
+  return setImmediate(cb.bind(null, new Error('A fatal error')));
+}
--- a/node_modules/proper-lockfile/node_modules/retry/index.js
+++ b/node_modules/proper-lockfile/node_modules/retry/index.js
@@ -0,0 +1 @@
+module.exports = require('./lib/retry');
--- a/node_modules/proper-lockfile/node_modules/retry/lib/retry.js
+++ b/node_modules/proper-lockfile/node_modules/retry/lib/retry.js
@@ -0,0 +1,100 @@
+var RetryOperation = require('./retry_operation');
+
+exports.operation = function(options) {
+  var timeouts = exports.timeouts(options);
+  return new RetryOperation(timeouts, {
+      forever: options && options.forever,
+      unref: options && options.unref,
+      maxRetryTime: options && options.maxRetryTime
+  });
+};
+
+exports.timeouts = function(options) {
+  if (options instanceof Array) {
+    return [].concat(options);
+  }
+
+  var opts = {
+    retries: 10,
+    factor: 2,
+    minTimeout: 1 * 1000,
+    maxTimeout: Infinity,
+    randomize: false
+  };
+  for (var key in options) {
+    opts[key] = options[key];
+  }
+
+  if (opts.minTimeout > opts.maxTimeout) {
+    throw new Error('minTimeout is greater than maxTimeout');
+  }
+
+  var timeouts = [];
+  for (var i = 0; i < opts.retries; i++) {
+    timeouts.push(this.createTimeout(i, opts));
+  }
+
+  if (options && options.forever && !timeouts.length) {
+    timeouts.push(this.createTimeout(i, opts));
+  }
+
+  // sort the array numerically ascending
+  timeouts.sort(function(a,b) {
+    return a - b;
+  });
+
+  return timeouts;
+};
+
+exports.createTimeout = function(attempt, opts) {
+  var random = (opts.randomize)
+    ? (Math.random() + 1)
+    : 1;
+
+  var timeout = Math.round(random * opts.minTimeout * Math.pow(opts.factor, attempt));
+  timeout = Math.min(timeout, opts.maxTimeout);
+
+  return timeout;
+};
+
+exports.wrap = function(obj, options, methods) {
+  if (options instanceof Array) {
+    methods = options;
+    options = null;
+  }
+
+  if (!methods) {
+    methods = [];
+    for (var key in obj) {
+      if (typeof obj[key] === 'function') {
+        methods.push(key);
+      }
+    }
+  }
+
+  for (var i = 0; i < methods.length; i++) {
+    var method   = methods[i];
+    var original = obj[method];
+
+    obj[method] = function retryWrapper(original) {
+      var op       = exports.operation(options);
+      var args     = Array.prototype.slice.call(arguments, 1);
+      var callback = args.pop();
+
+      args.push(function(err) {
+        if (op.retry(err)) {
+          return;
+        }
+        if (err) {
+          arguments[0] = op.mainError();
+        }
+        callback.apply(this, arguments);
+      });
+
+      op.attempt(function() {
+        original.apply(obj, args);
+      });
+    }.bind(obj, original);
+    obj[method].options = options;
+  }
+};
--- a/node_modules/proper-lockfile/node_modules/retry/lib/retry_operation.js
+++ b/node_modules/proper-lockfile/node_modules/retry/lib/retry_operation.js
@@ -0,0 +1,158 @@
+function RetryOperation(timeouts, options) {
+  // Compatibility for the old (timeouts, retryForever) signature
+  if (typeof options === 'boolean') {
+    options = { forever: options };
+  }
+
+  this._originalTimeouts = JSON.parse(JSON.stringify(timeouts));
+  this._timeouts = timeouts;
+  this._options = options || {};
+  this._maxRetryTime = options && options.maxRetryTime || Infinity;
+  this._fn = null;
+  this._errors = [];
+  this._attempts = 1;
+  this._operationTimeout = null;
+  this._operationTimeoutCb = null;
+  this._timeout = null;
+  this._operationStart = null;
+
+  if (this._options.forever) {
+    this._cachedTimeouts = this._timeouts.slice(0);
+  }
+}
+module.exports = RetryOperation;
+
+RetryOperation.prototype.reset = function() {
+  this._attempts = 1;
+  this._timeouts = this._originalTimeouts;
+}
+
+RetryOperation.prototype.stop = function() {
+  if (this._timeout) {
+    clearTimeout(this._timeout);
+  }
+
+  this._timeouts       = [];
+  this._cachedTimeouts = null;
+};
+
+RetryOperation.prototype.retry = function(err) {
+  if (this._timeout) {
+    clearTimeout(this._timeout);
+  }
+
+  if (!err) {
+    return false;
+  }
+  var currentTime = new Date().getTime();
+  if (err && currentTime - this._operationStart >= this._maxRetryTime) {
+    this._errors.unshift(new Error('RetryOperation timeout occurred'));
+    return false;
+  }
+
+  this._errors.push(err);
+
+  var timeout = this._timeouts.shift();
+  if (timeout === undefined) {
+    if (this._cachedTimeouts) {
+      // retry forever, only keep last error
+      this._errors.splice(this._errors.length - 1, this._errors.length);
+      this._timeouts = this._cachedTimeouts.slice(0);
+      timeout = this._timeouts.shift();
+    } else {
+      return false;
+    }
+  }
+
+  var self = this;
+  var timer = setTimeout(function() {
+    self._attempts++;
+
+    if (self._operationTimeoutCb) {
+      self._timeout = setTimeout(function() {
+        self._operationTimeoutCb(self._attempts);
+      }, self._operationTimeout);
+
+      if (self._options.unref) {
+          self._timeout.unref();
+      }
+    }
+
+    self._fn(self._attempts);
+  }, timeout);
+
+  if (this._options.unref) {
+      timer.unref();
+  }
+
+  return true;
+};
+
+RetryOperation.prototype.attempt = function(fn, timeoutOps) {
+  this._fn = fn;
+
+  if (timeoutOps) {
+    if (timeoutOps.timeout) {
+      this._operationTimeout = timeoutOps.timeout;
+    }
+    if (timeoutOps.cb) {
+      this._operationTimeoutCb = timeoutOps.cb;
+    }
+  }
+
+  var self = this;
+  if (this._operationTimeoutCb) {
+    this._timeout = setTimeout(function() {
+      self._operationTimeoutCb();
+    }, self._operationTimeout);
+  }
+
+  this._operationStart = new Date().getTime();
+
+  this._fn(this._attempts);
+};
+
+RetryOperation.prototype.try = function(fn) {
+  console.log('Using RetryOperation.try() is deprecated');
+  this.attempt(fn);
+};
+
+RetryOperation.prototype.start = function(fn) {
+  console.log('Using RetryOperation.start() is deprecated');
+  this.attempt(fn);
+};
+
+RetryOperation.prototype.start = RetryOperation.prototype.try;
+
+RetryOperation.prototype.errors = function() {
+  return this._errors;
+};
+
+RetryOperation.prototype.attempts = function() {
+  return this._attempts;
+};
+
+RetryOperation.prototype.mainError = function() {
+  if (this._errors.length === 0) {
+    return null;
+  }
+
+  var counts = {};
+  var mainError = null;
+  var mainErrorCount = 0;
+
+  for (var i = 0; i < this._errors.length; i++) {
+    var error = this._errors[i];
+    var message = error.message;
+    var count = (counts[message] || 0) + 1;
+
+    counts[message] = count;
+
+    if (count >= mainErrorCount) {
+      mainError = error;
+      mainErrorCount = count;
+    }
+  }
+
+  return mainError;
+};
--- a/node_modules/proper-lockfile/node_modules/retry/package.json
+++ b/node_modules/proper-lockfile/node_modules/retry/package.json
@@ -0,0 +1,32 @@
+{
+  "author": "Tim Koschützki <tim@debuggable.com> (http://debuggable.com/)",
+  "name": "retry",
+  "description": "Abstraction for exponential and custom retry strategies for failed operations.",
+  "license": "MIT",
+  "version": "0.12.0",
+  "homepage": "https://github.com/tim-kos/node-retry",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/tim-kos/node-retry.git"
+  },
+  "directories": {
+    "lib": "./lib"
+  },
+  "main": "index",
+  "engines": {
+    "node": ">= 4"
+  },
+  "dependencies": {},
+  "devDependencies": {
+    "fake": "0.2.0",
+    "istanbul": "^0.4.5",
+    "tape": "^4.8.0"
+  },
+  "scripts": {
+    "test": "./node_modules/.bin/istanbul cover ./node_modules/tape/bin/tape ./test/integration/*.js",
+    "release:major": "env SEMANTIC=major npm run release",
+    "release:minor": "env SEMANTIC=minor npm run release",
+    "release:patch": "env SEMANTIC=patch npm run release",
+    "release": "npm version ${SEMANTIC:-patch} -m \"Release %s\" && git push && git push --tags && npm publish"
+  }
+}
--- a/node_modules/proper-lockfile/node_modules/retry/test/common.js
+++ b/node_modules/proper-lockfile/node_modules/retry/test/common.js
@@ -0,0 +1,10 @@
+var common = module.exports;
+var path = require('path');
+
+var rootDir = path.join(__dirname, '..');
+common.dir = {
+  lib: rootDir + '/lib'
+};
+
+common.assert = require('assert');
+common.fake = require('fake');
--- a/node_modules/proper-lockfile/node_modules/retry/test/integration/test-forever.js
+++ b/node_modules/proper-lockfile/node_modules/retry/test/integration/test-forever.js
@@ -0,0 +1,24 @@
+var common = require('../common');
+var assert = common.assert;
+var retry = require(common.dir.lib + '/retry');
+
+(function testForeverUsesFirstTimeout() {
+  var operation = retry.operation({
+    retries: 0,
+    minTimeout: 100,
+    maxTimeout: 100,
+    forever: true
+  });
+
+  operation.attempt(function(numAttempt) {
+    console.log('>numAttempt', numAttempt);
+    var err = new Error("foo");
+    if (numAttempt == 10) {
+      operation.stop();
+    }
+
+    if (operation.retry(err)) {
+      return;
+    }
+  });
+})();
--- a/node_modules/proper-lockfile/node_modules/retry/test/integration/test-retry-operation.js
+++ b/node_modules/proper-lockfile/node_modules/retry/test/integration/test-retry-operation.js
@@ -0,0 +1,258 @@
+var common = require('../common');
+var assert = common.assert;
+var fake = common.fake.create();
+var retry = require(common.dir.lib + '/retry');
+
+(function testReset() {
+  var error = new Error('some error');
+  var operation = retry.operation([1, 2, 3]);
+  var attempts = 0;
+
+  var finalCallback = fake.callback('finalCallback');
+  fake.expectAnytime(finalCallback);
+
+  var expectedFinishes = 1;
+  var finishes         = 0;
+
+  var fn = function() {
+    operation.attempt(function(currentAttempt) {
+      attempts++;
+      assert.equal(currentAttempt, attempts);
+      if (operation.retry(error)) {
+        return;
+      }
+
+      finishes++
+      assert.equal(expectedFinishes, finishes);
+      assert.strictEqual(attempts, 4);
+      assert.strictEqual(operation.attempts(), attempts);
+      assert.strictEqual(operation.mainError(), error);
+
+      if (finishes < 2) {
+        attempts = 0;
+        expectedFinishes++;
+        operation.reset();
+        fn()
+      } else {
+        finalCallback();
+      }
+    });
+  };
+
+  fn();
+})();
+
+(function testErrors() {
+  var operation = retry.operation();
+
+  var error = new Error('some error');
+  var error2 = new Error('some other error');
+  operation._errors.push(error);
+  operation._errors.push(error2);
+
+  assert.deepEqual(operation.errors(), [error, error2]);
+})();
+
+(function testMainErrorReturnsMostFrequentError() {
+  var operation = retry.operation();
+  var error = new Error('some error');
+  var error2 = new Error('some other error');
+
+  operation._errors.push(error);
+  operation._errors.push(error2);
+  operation._errors.push(error);
+
+  assert.strictEqual(operation.mainError(), error);
+})();
+
+(function testMainErrorReturnsLastErrorOnEqualCount() {
+  var operation = retry.operation();
+  var error = new Error('some error');
+  var error2 = new Error('some other error');
+
+  operation._errors.push(error);
+  operation._errors.push(error2);
+
+  assert.strictEqual(operation.mainError(), error2);
+})();
+
+(function testAttempt() {
+  var operation = retry.operation();
+  var fn = new Function();
+
+  var timeoutOpts = {
+    timeout: 1,
+    cb: function() {}
+  };
+  operation.attempt(fn, timeoutOpts);
+
+  assert.strictEqual(fn, operation._fn);
+  assert.strictEqual(timeoutOpts.timeout, operation._operationTimeout);
+  assert.strictEqual(timeoutOpts.cb, operation._operationTimeoutCb);
+})();
+
+(function testRetry() {
+  var error = new Error('some error');
+  var operation = retry.operation([1, 2, 3]);
+  var attempts = 0;
+
+  var finalCallback = fake.callback('finalCallback');
+  fake.expectAnytime(finalCallback);
+
+  var fn = function() {
+    operation.attempt(function(currentAttempt) {
+      attempts++;
+      assert.equal(currentAttempt, attempts);
+      if (operation.retry(error)) {
+        return;
+      }
+
+      assert.strictEqual(attempts, 4);
+      assert.strictEqual(operation.attempts(), attempts);
+      assert.strictEqual(operation.mainError(), error);
+      finalCallback();
+    });
+  };
+
+  fn();
+})();
+
+(function testRetryForever() {
+  var error = new Error('some error');
+  var operation = retry.operation({ retries: 3, forever: true });
+  var attempts = 0;
+
+  var finalCallback = fake.callback('finalCallback');
+  fake.expectAnytime(finalCallback);
+
+  var fn = function() {
+    operation.attempt(function(currentAttempt) {
+      attempts++;
+      assert.equal(currentAttempt, attempts);
+      if (attempts !== 6 && operation.retry(error)) {
+        return;
+      }
+
+      assert.strictEqual(attempts, 6);
+      assert.strictEqual(operation.attempts(), attempts);
+      assert.strictEqual(operation.mainError(), error);
+      finalCallback();
+    });
+  };
+
+  fn();
+})();
+
+(function testRetryForeverNoRetries() {
+  var error = new Error('some error');
+  var delay = 50
+  var operation = retry.operation({
+    retries: null,
+    forever: true,
+    minTimeout: delay,
+    maxTimeout: delay
+  });
+
+  var attempts = 0;
+  var startTime = new Date().getTime();
+
+  var finalCallback = fake.callback('finalCallback');
+  fake.expectAnytime(finalCallback);
+
+  var fn = function() {
+    operation.attempt(function(currentAttempt) {
+      attempts++;
+      assert.equal(currentAttempt, attempts);
+      if (attempts !== 4 && operation.retry(error)) {
+        return;
+      }
+
+      var endTime = new Date().getTime();
+      var minTime = startTime + (delay * 3);
+      var maxTime = minTime + 20 // add a little headroom for code execution time
+      assert(endTime >= minTime)
+      assert(endTime < maxTime)
+      assert.strictEqual(attempts, 4);
+      assert.strictEqual(operation.attempts(), attempts);
+      assert.strictEqual(operation.mainError(), error);
+      finalCallback();
+    });
+  };
+
+  fn();
+})();
+
+(function testStop() {
+  var error = new Error('some error');
+  var operation = retry.operation([1, 2, 3]);
+  var attempts = 0;
+
+  var finalCallback = fake.callback('finalCallback');
+  fake.expectAnytime(finalCallback);
+
+  var fn = function() {
+    operation.attempt(function(currentAttempt) {
+      attempts++;
+      assert.equal(currentAttempt, attempts);
+
+      if (attempts === 2) {
+        operation.stop();
+
+        assert.strictEqual(attempts, 2);
+        assert.strictEqual(operation.attempts(), attempts);
+        assert.strictEqual(operation.mainError(), error);
+        finalCallback();
+      }
+
+      if (operation.retry(error)) {
+        return;
+      }
+    });
+  };
+
+  fn();
+})();
+
+(function testMaxRetryTime() {
+  var error = new Error('some error');
+  var maxRetryTime = 30;
+  var operation = retry.operation({
+      minTimeout: 1,
+      maxRetryTime: maxRetryTime
+  });
+  var attempts = 0;
+
+  var finalCallback = fake.callback('finalCallback');
+  fake.expectAnytime(finalCallback);
+
+  var longAsyncFunction = function (wait, callback){
+    setTimeout(callback, wait);
+  };
+
+  var fn = function() {
+    var startTime = new Date().getTime();
+    operation.attempt(function(currentAttempt) {
+      attempts++;
+      assert.equal(currentAttempt, attempts);
+
+      if (attempts !== 2) {
+        if (operation.retry(error)) {
+            return;
+        }
+      } else {
+        var curTime = new Date().getTime();
+        longAsyncFunction(maxRetryTime - (curTime - startTime - 1), function(){
+          if (operation.retry(error)) {
+            assert.fail('timeout should be occurred');
+            return;
+          }
+
+          assert.strictEqual(operation.mainError(), error);
+          finalCallback();
+        });
+      }
+    });
+  };
+
+  fn();
+})();
--- a/node_modules/proper-lockfile/node_modules/retry/test/integration/test-retry-wrap.js
+++ b/node_modules/proper-lockfile/node_modules/retry/test/integration/test-retry-wrap.js
@@ -0,0 +1,101 @@
+var common = require('../common');
+var assert = common.assert;
+var fake = common.fake.create();
+var retry = require(common.dir.lib + '/retry');
+
+function getLib() {
+  return {
+    fn1: function() {},
+    fn2: function() {},
+    fn3: function() {}
+  };
+}
+
+(function wrapAll() {
+  var lib = getLib();
+  retry.wrap(lib);
+  assert.equal(lib.fn1.name, 'bound retryWrapper');
+  assert.equal(lib.fn2.name, 'bound retryWrapper');
+  assert.equal(lib.fn3.name, 'bound retryWrapper');
+}());
+
+(function wrapAllPassOptions() {
+  var lib = getLib();
+  retry.wrap(lib, {retries: 2});
+  assert.equal(lib.fn1.name, 'bound retryWrapper');
+  assert.equal(lib.fn2.name, 'bound retryWrapper');
+  assert.equal(lib.fn3.name, 'bound retryWrapper');
+  assert.equal(lib.fn1.options.retries, 2);
+  assert.equal(lib.fn2.options.retries, 2);
+  assert.equal(lib.fn3.options.retries, 2);
+}());
+
+(function wrapDefined() {
+  var lib = getLib();
+  retry.wrap(lib, ['fn2', 'fn3']);
+  assert.notEqual(lib.fn1.name, 'bound retryWrapper');
+  assert.equal(lib.fn2.name, 'bound retryWrapper');
+  assert.equal(lib.fn3.name, 'bound retryWrapper');
+}());
+
+(function wrapDefinedAndPassOptions() {
+  var lib = getLib();
+  retry.wrap(lib, {retries: 2}, ['fn2', 'fn3']);
+  assert.notEqual(lib.fn1.name, 'bound retryWrapper');
+  assert.equal(lib.fn2.name, 'bound retryWrapper');
+  assert.equal(lib.fn3.name, 'bound retryWrapper');
+  assert.equal(lib.fn2.options.retries, 2);
+  assert.equal(lib.fn3.options.retries, 2);
+}());
+
+(function runWrappedWithoutError() {
+  var callbackCalled;
+  var lib = {method: function(a, b, callback) {
+    assert.equal(a, 1);
+    assert.equal(b, 2);
+    assert.equal(typeof callback, 'function');
+    callback();
+  }};
+  retry.wrap(lib);
+  lib.method(1, 2, function() {
+    callbackCalled = true;
+  });
+  assert.ok(callbackCalled);
+}());
+
+(function runWrappedSeveralWithoutError() {
+  var callbacksCalled = 0;
+  var lib = {
+    fn1: function (a, callback) {
+      assert.equal(a, 1);
+      assert.equal(typeof callback, 'function');
+      callback();
+    },
+    fn2: function (a, callback) {
+      assert.equal(a, 2);
+      assert.equal(typeof callback, 'function');
+      callback();
+    }
+  };
+  retry.wrap(lib, {}, ['fn1', 'fn2']);
+  lib.fn1(1, function() {
+    callbacksCalled++;
+  });
+  lib.fn2(2, function() {
+    callbacksCalled++;
+  });
+  assert.equal(callbacksCalled, 2);
+}());
+
+(function runWrappedWithError() {
+  var callbackCalled;
+  var lib = {method: function(callback) {
+    callback(new Error('Some error'));
+  }};
+  retry.wrap(lib, {retries: 1});
+  lib.method(function(err) {
+    callbackCalled = true;
+    assert.ok(err instanceof Error);
+  });
+  assert.ok(!callbackCalled);
+}());
--- a/node_modules/proper-lockfile/node_modules/retry/test/integration/test-timeouts.js
+++ b/node_modules/proper-lockfile/node_modules/retry/test/integration/test-timeouts.js
@@ -0,0 +1,69 @@
+var common = require('../common');
+var assert = common.assert;
+var retry = require(common.dir.lib + '/retry');
+
+(function testDefaultValues() {
+  var timeouts = retry.timeouts();
+
+  assert.equal(timeouts.length, 10);
+  assert.equal(timeouts[0], 1000);
+  assert.equal(timeouts[1], 2000);
+  assert.equal(timeouts[2], 4000);
+})();
+
+(function testDefaultValuesWithRandomize() {
+  var minTimeout = 5000;
+  var timeouts = retry.timeouts({
+    minTimeout: minTimeout,
+    randomize: true
+  });
+
+  assert.equal(timeouts.length, 10);
+  assert.ok(timeouts[0] > minTimeout);
+  assert.ok(timeouts[1] > timeouts[0]);
+  assert.ok(timeouts[2] > timeouts[1]);
+})();
+
+(function testPassedTimeoutsAreUsed() {
+  var timeoutsArray = [1000, 2000, 3000];
+  var timeouts = retry.timeouts(timeoutsArray);
+  assert.deepEqual(timeouts, timeoutsArray);
+  assert.notStrictEqual(timeouts, timeoutsArray);
+})();
+
+(function testTimeoutsAreWithinBoundaries() {
+  var minTimeout = 1000;
+  var maxTimeout = 10000;
+  var timeouts = retry.timeouts({
+    minTimeout: minTimeout,
+    maxTimeout: maxTimeout
+  });
+  for (var i = 0; i < timeouts; i++) {
+    assert.ok(timeouts[i] >= minTimeout);
+    assert.ok(timeouts[i] <= maxTimeout);
+  }
+})();
+
+(function testTimeoutsAreIncremental() {
+  var timeouts = retry.timeouts();
+  var lastTimeout = timeouts[0];
+  for (var i = 0; i < timeouts; i++) {
+    assert.ok(timeouts[i] > lastTimeout);
+    lastTimeout = timeouts[i];
+  }
+})();
+
+(function testTimeoutsAreIncrementalForFactorsLessThanOne() {
+  var timeouts = retry.timeouts({
+    retries: 3,
+    factor: 0.5
+  });
+
+  var expected = [250, 500, 1000];
+  assert.deepEqual(expected, timeouts);
+})();
+
+(function testRetries() {
+  var timeouts = retry.timeouts({retries: 2});
+  assert.strictEqual(timeouts.length, 2);
+})();
--- a/node_modules/proper-lockfile/package.json
+++ b/node_modules/proper-lockfile/package.json
@@ -0,0 +1,71 @@
+{
+  "name": "proper-lockfile",
+  "version": "4.1.2",
+  "description": "A inter-process and inter-machine lockfile utility that works on a local or network file system",
+  "keywords": [
+    "lock",
+    "locking",
+    "file",
+    "lockfile",
+    "fs",
+    "cross-process"
+  ],
+  "author": "André Cruz <andre@moxy.studio>",
+  "homepage": "https://github.com/moxystudio/node-proper-lockfile",
+  "repository": {
+    "type": "git",
+    "url": "git@github.com:moxystudio/node-proper-lockfile.git"
+  },
+  "license": "MIT",
+  "main": "index.js",
+  "files": [
+    "lib"
+  ],
+  "scripts": {
+    "lint": "eslint .",
+    "test": "jest --env node --coverage --runInBand",
+    "prerelease": "npm t && npm run lint",
+    "release": "standard-version",
+    "postrelease": "git push --follow-tags origin HEAD && npm publish"
+  },
+  "husky": {
+    "hooks": {
+      "commit-msg": "commitlint -E HUSKY_GIT_PARAMS",
+      "pre-commit": "lint-staged"
+    }
+  },
+  "lint-staged": {
+    "*.js": [
+      "eslint --fix",
+      "git add"
+    ]
+  },
+  "commitlint": {
+    "extends": [
+      "@commitlint/config-conventional"
+    ]
+  },
+  "dependencies": {
+    "graceful-fs": "^4.2.4",
+    "retry": "^0.12.0",
+    "signal-exit": "^3.0.2"
+  },
+  "devDependencies": {
+    "@commitlint/cli": "^7.0.0",
+    "@commitlint/config-conventional": "^7.0.1",
+    "@segment/clear-timeouts": "^2.0.0",
+    "delay": "^4.1.0",
+    "eslint": "^5.3.0",
+    "eslint-config-moxy": "^7.1.0",
+    "execa": "^1.0.0",
+    "husky": "^1.1.4",
+    "jest": "^24.5.0",
+    "lint-staged": "^8.0.4",
+    "mkdirp": "^0.5.1",
+    "p-defer": "^2.1.0",
+    "rimraf": "^2.6.2",
+    "stable": "^0.1.8",
+    "standard-version": "^5.0.0",
+    "thread-sleep": "^2.1.0"
+  }
+}