From 936ee2192e07a475eb9708ff5de5787feee5c2f5 Mon Sep 17 00:00:00 2001
From: Ash Wilson <smashwilson@github.com>
Date: Fri, 20 Apr 2018 10:41:04 -0400
Subject: [PATCH 01/10] Log events from JavaScript

---
 lib/binding.js | 30 +++++++++++++++++++++++-
 lib/logger.js  | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 92 insertions(+), 1 deletion(-)
 create mode 100644 lib/logger.js

diff --git a/lib/binding.js b/lib/binding.js
index 54793ed5..b4f4078f 100644
--- a/lib/binding.js
+++ b/lib/binding.js
@@ -1,5 +1,6 @@
-let watcher = null
+const logger = require('./logger');
 
+let watcher = null
 function getWatcher () {
   if (!watcher) {
     try {
@@ -44,6 +45,32 @@ function logOption (baseName, options, normalized) {
   throw new Error(`option ${baseName} must be DISABLE, STDERR, STDOUT, or a filename`)
 }
 
+function jsLogOption (value) {
+  if (value === undefined) return
+
+  if (value === DISABLE) {
+    logger.disable()
+    return
+  }
+
+  if (value === STDERR) {
+    logger.toStderr()
+    return
+  }
+
+  if (value === STDOUT) {
+    logger.toStdout()
+    return
+  }
+
+  if (typeof value === 'string' || value instanceof String) {
+    logger.toFile(value)
+    return
+  }
+
+  throw new Error('option jsLog must be DISABLE, STDERR, STDOUT, or a filename')
+}
+
 function configure (options) {
   if (!options) {
     return Promise.reject(new Error('configure() requires an option object'))
@@ -54,6 +81,7 @@ function configure (options) {
   logOption('mainLog', options, normalized)
   logOption('workerLog', options, normalized)
   logOption('pollingLog', options, normalized)
+  jsLogOption(options.jsLog)
 
   if (options.workerCacheSize) normalized.workerCacheSize = options.workerCacheSize
   if (options.pollingThrottle) normalized.pollingThrottle = options.pollingThrottle
diff --git a/lib/logger.js b/lib/logger.js
new file mode 100644
index 00000000..7a04a534
--- /dev/null
+++ b/lib/logger.js
@@ -0,0 +1,63 @@
+const util = require('util');
+const fs = require('fs');
+
+class StreamLogger {
+  constructor(stream) {
+    this.stream = stream;
+  }
+
+  log(...args) {
+    this.stream.out(util.format(...args));
+  }
+}
+
+const nullLogger = {
+  log() {},
+}
+
+let activeLogger = null
+
+function disable() {
+  activeLogger = nullLogger
+}
+
+function toStdout() {
+  activeLogger = new StreamLogger(process.stdout)
+}
+
+function toStderr() {
+  activeLogger = new StreamLogger(process.stderr)
+}
+
+function toFile(filePath) {
+  const stream = fs.createWriteStream(filePath, {defaultEncoding: 'utf8', flags: 'a'})
+  activeLogger = new StreamLogger(stream)
+}
+
+function fromEnv(value) {
+  if (!value) {
+    return disable();
+  } else if (value === 'stdout') {
+    return toStdout();
+  } else if (value === 'stderr') {
+    return toStderr();
+  } else {
+    return toFile(value);
+  }
+}
+
+function getActiveLogger() {
+  if (activeLogger === null) {
+    fromEnv(process.env.WATCHER_LOG_JS)
+  }
+  return activeLogger;
+}
+
+module.exports = {
+  disable,
+  toStdout,
+  toStderr,
+  toFile,
+  fromEnv,
+  log(...args) { return getActiveLogger().log(...args) }
+}

From 24c9e00e9e195558bd60e6e02ebbe96d58f1372c Mon Sep 17 00:00:00 2001
From: Ash Wilson <smashwilson@github.com>
Date: Fri, 20 Apr 2018 11:11:58 -0400
Subject: [PATCH 02/10] Log a ton of tree manipulation

---
 lib/native-watcher-registry.js |  4 ++++
 lib/native-watcher.js          | 13 +++++++++++++
 lib/path-watcher.js            | 16 ++++++++++++++++
 lib/registry/tree.js           | 16 +++++++++++++++-
 4 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/lib/native-watcher-registry.js b/lib/native-watcher-registry.js
index 11787000..563d82f1 100644
--- a/lib/native-watcher-registry.js
+++ b/lib/native-watcher-registry.js
@@ -1,4 +1,5 @@
 const path = require('path')
+const { log } = require('./logger')
 const { Tree } = require('./registry/tree')
 
 // Private: Track the directories being monitored by native filesystem watchers. Minimize the number of native watchers
@@ -28,12 +29,15 @@ class NativeWatcherRegistry {
   //
   // * `watcher` an unattached {PathWatcher}.
   async attach (watcher) {
+    log('attaching watcher %s to native registry.', watcher)
     const normalizedDirectory = await watcher.getNormalizedPathPromise()
     const pathSegments = normalizedDirectory.split(path.sep).filter(segment => segment.length > 0)
 
+    log('adding watcher %s to tree.', watcher)
     this.tree.add(pathSegments, watcher.getOptions(), (native, nativePath, options) => {
       watcher.attachToNative(native, nativePath, options)
     })
+    log('watcher %s added. tree state:\n%s', watcher, this.print())
   }
 
   // Private: Generate a visual representation of the currently active watchers managed by this
diff --git a/lib/native-watcher.js b/lib/native-watcher.js
index 067229a3..ecc700c2 100644
--- a/lib/native-watcher.js
+++ b/lib/native-watcher.js
@@ -1,5 +1,6 @@
 const binding = require('./binding')
 const { Emitter, CompositeDisposable, Disposable } = require('event-kit')
+const { log } = require('./logger')
 
 const ACTIONS = new Map([
   [0, 'created'],
@@ -37,6 +38,8 @@ class NativeWatcher {
 
     this.onEvents = this.onEvents.bind(this)
     this.onError = this.onError.bind(this)
+
+    log('create NativeWatcher %s with options %j.', this, this.options)
   }
 
   // Private: Begin watching for filesystem events.
@@ -44,14 +47,17 @@ class NativeWatcher {
   // Has no effect if the watcher has already been started.
   async start () {
     if (this.state === STARTING) {
+      log('NativeWatcher %s is already starting.', this)
       await new Promise(resolve => this.emitter.once('did-start', resolve))
       return
     }
 
     if (this.state === RUNNING || this.state === STOPPING) {
+      log('NativeWatcher %s is running or stopping.', this)
       return
     }
 
+    log('Starting NativeWatcher %s.', this)
     this.state = STARTING
 
     this.channel = await new Promise((resolve, reject) => {
@@ -64,6 +70,7 @@ class NativeWatcher {
         resolve(channel)
       }, this.onEvents)
     })
+    log('NativeWatcher %s assigned channel %d.', this, this.channel)
 
     this.state = RUNNING
     this.emitter.emit('did-start')
@@ -98,6 +105,7 @@ class NativeWatcher {
     return new Disposable(() => {
       sub.dispose()
       if (this.emitter.listenerCountForEventName('did-change') === 0) {
+        log('Last subscriber disposed on NativeWatcher %s.', this)
         this.stop()
       }
     })
@@ -149,15 +157,18 @@ class NativeWatcher {
   // Has no effect if the watcher is not running.
   async stop (split = true) {
     if (this.state === STOPPING) {
+      log('NativeWatcher %s is already stopping.', this)
       await new Promise(resolve => this.emitter.once('did-stop', resolve))
       return
     }
 
     if (this.state === STARTING) {
+      log('NativeWatcher %s is still starting.', this)
       await new Promise(resolve => this.emitter.once('did-start', resolve))
     }
 
     if (this.state === STOPPED) {
+      log('NativeWatcher %s has already stopped.', this)
       return
     }
 
@@ -165,6 +176,7 @@ class NativeWatcher {
       throw new Error('Cannot stop a watcher with no channel')
     }
 
+    log('Stopping NativeWatcher %s with split %s.', this, split)
     this.state = STOPPING
     this.emitter.emit('will-stop', split)
 
@@ -173,6 +185,7 @@ class NativeWatcher {
     })
     this.channel = null
     this.state = STOPPED
+    log('NativeWatcher %s has been stopped.', this)
 
     this.emitter.emit('did-stop')
   }
diff --git a/lib/path-watcher.js b/lib/path-watcher.js
index 7b1be43d..35d336a0 100644
--- a/lib/path-watcher.js
+++ b/lib/path-watcher.js
@@ -2,6 +2,7 @@ const fs = require('fs-extra')
 const path = require('path')
 
 const { Emitter, CompositeDisposable, Disposable } = require('event-kit')
+const { log } = require('./logger')
 
 // Extended: Manage a subscription to filesystem events that occur beneath a root directory. Construct these by
 // calling `watchPath`.
@@ -60,6 +61,7 @@ class PathWatcher {
     this.nativeWatcherRegistry = nativeWatcherRegistry
     this.watchedPath = watchedPath
     this.options = Object.assign({ recursive: true, include: () => true }, options)
+    log('create PathWatcher at %s with options %j.', watchedPath, options)
 
     this.normalizedPath = null
     this.native = null
@@ -81,6 +83,7 @@ class PathWatcher {
       fs.realpath(watchedPath),
       fs.stat(watchedPath)
     ]).then(([real, stat]) => {
+      log('normalized and stat path %s to %s.', watchedPath, real)
       if (stat.isDirectory()) {
         this.normalizedPath = real
       } else {
@@ -157,8 +160,10 @@ class PathWatcher {
 
       this.native.start()
     } else {
+      log('attaching watcher %s to registry because a change listener has been attached.', this)
       // Attach to a new native listener and retry
       this.nativeWatcherRegistry.attach(this).then(() => {
+        log('watcher %s attached successfully.', this)
         this.onDidChange(callback)
       }, err => this.rejectAttachedPromise(err))
     }
@@ -167,6 +172,7 @@ class PathWatcher {
       const sub = this.changeCallbacks.get(callback)
       this.changeCallbacks.delete(callback)
       sub.dispose()
+      log('disposed subscription from watcher %s.', this)
     })
   }
 
@@ -184,11 +190,15 @@ class PathWatcher {
   attachToNative (native) {
     this.subs.dispose()
     this.native = native
+    log('attaching watcher %s to native %s.', this, native)
 
     if (native.isRunning()) {
+      log('native %s is already running.', native)
       this.resolveStartPromise()
     } else {
+      log('waiting for native %s to start.', native)
       this.subs.add(native.onDidStart(() => {
+        log('native %s has started.')
         this.resolveStartPromise()
       }))
     }
@@ -196,6 +206,7 @@ class PathWatcher {
     // Transfer any native event subscriptions to the new NativeWatcher once it starts.
     this.getStartPromise().then(() => {
       if (this.native === native) {
+        log('transferring %d existing event subscriptions to new native %s.', this.changeCallbacks.size, native)
         for (const [callback, formerSub] of this.changeCallbacks) {
           const newSub = native.onDidChange(events => this.onNativeEvents(events, callback))
           this.changeCallbacks.set(callback, newSub)
@@ -213,17 +224,21 @@ class PathWatcher {
       if (replacement === native) return
       if (!this.normalizedPath.startsWith(watchedPath)) return
       if (!options.recursive && this.normalizedPath !== watchedPath) return
+      log('received detachment request from native %s. replacement is at path %s with options %j.',
+        native, watchedPath, options)
 
       this.attachToNative(replacement)
     }))
 
     this.subs.add(native.onWillStop(() => {
       if (this.native === native) {
+        log('native %s is stopping.', native);
         this.subs.dispose()
         this.native = null
       }
     }))
 
+    log('watcher %s attached successfully to native %s.', this, native)
     this.resolveAttachedPromise()
   }
 
@@ -289,6 +304,7 @@ class PathWatcher {
 
     this.emitter.dispose()
     this.subs.dispose()
+    log('watcher %s disposed.', this)
   }
 
   // Extended: Print the directory that this watcher is watching.
diff --git a/lib/registry/tree.js b/lib/registry/tree.js
index ffdcd545..b8c1db0e 100644
--- a/lib/registry/tree.js
+++ b/lib/registry/tree.js
@@ -3,6 +3,7 @@ const { absolute } = require('./helper')
 const { DirectoryNode } = require('./directory-node')
 const { RecursiveWatcherNode } = require('./recursive-watcher-node')
 const { NonrecursiveWatcherNode } = require('./nonrecursive-watcher-node')
+const { log } = require('../logger')
 
 // Private: Map userland filesystem watcher subscriptions efficiently to deliver filesystem change notifications to
 // each watcher with the most efficient coverage of native watchers.
@@ -37,6 +38,7 @@ class Tree {
   add (pathSegments, options, attachToNative) {
     const absolutePathSegments = this.basePathSegments.concat(pathSegments)
     const absolutePath = absolute(...absolutePathSegments)
+    log('Tree: adding %j with options %j. absolute = %s.', pathSegments, options, absolutePath)
 
     const attachToNew = (children, immediate) => {
       const native = this.createNative(absolutePath, options)
@@ -57,15 +59,21 @@ class Tree {
 
     this.root.lookup(pathSegments).when({
       parent: (parent, remaining) => {
+        log('Tree: discovered parent node %s with remaining segments %j.', parent, remaining)
+
         // An existing NativeWatcher is watching the same directory or a parent directory of the requested path.
         const existingNative = parent.getNativeWatcher()
         const absoluteParentPath = absolute(...parent.getAbsolutePathSegments())
 
         if (parent.isCompatible(options)) {
+          log('Tree: adding child path and attaching to existing native %s.', existingNative)
+
           // Attach this Watcher to it as a filtering watcher and record it as a dependent child path.
           parent.addChildPath(remaining, options)
           attachToNative(existingNative, absoluteParentPath, parent.getOptions())
         } else {
+          log('Tree: broadening existing native watcher %s.', existingNative)
+
           // Construct and attach a new {NativeWatcher} that will deliver events suitable for both the old and
           // new watchers. Reattach consumers of the existing {NativeWatcher} and stop it.
           const newNative = attachToNew([], {})
@@ -74,11 +82,14 @@ class Tree {
         }
       },
       children: (children, immediate) => {
+        log('Tree: discovered watched children %j.', children)
+
         // One or more NativeWatchers exist on child directories of the requested path. Create a new native watcher
         // on the parent directory.
         const newNative = attachToNew(children, immediate)
 
         if (options.recursive) {
+          log('Tree: adopting %d existing children.', children.length)
           // Create a new native watcher on the parent directory, note the subscribed child paths, and cleanly stop the
           // child native watchers.
 
@@ -90,7 +101,10 @@ class Tree {
           }
         }
       },
-      missing: () => attachToNew([], {})
+      missing: () => {
+        log('Tree: creating and attaching new native watcher.')
+        attachToNew([], {})
+      }
     })
   }
 

From f40ed39e83ee124d6d9586794dcb2a8f3809a675 Mon Sep 17 00:00:00 2001
From: Ash Wilson <smashwilson@github.com>
Date: Fri, 20 Apr 2018 14:06:29 -0400
Subject: [PATCH 03/10] :arrow_up: package-lock

---
 package-lock.json | 637 +++++++++++++++++++++-------------------------
 1 file changed, 286 insertions(+), 351 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index ae961aff..10f6d000 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,20 +11,11 @@
       "dev": true
     },
     "acorn": {
-      "version": "5.7.3",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.3.tgz",
-      "integrity": "sha512-T/zvzYRfbVojPWahDsE5evJdHb3oJoQfFbsrKM7w5Zcs++Tr257tia3BmMP8XYVjp1S9RZXQMh7gao96BlqZOw==",
+      "version": "5.5.3",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.5.3.tgz",
+      "integrity": "sha512-jd5MkIUlbbmb07nXH0DT3y7rDVtkzDi4XZOUVWAer8ajmF/DTSSbl5oNFyDOl/OXA33Bl79+ypHhl2pN20VeOQ==",
       "dev": true
     },
-    "acorn-jsx": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-4.1.1.tgz",
-      "integrity": "sha512-JY+iV6r+cO21KtntVvFkD+iqjtdpRUpGqKWgfkCdZq1R+kbreEl8EcdcJR4SmiIgsIQT33s6QzheQ9a275Q8xw==",
-      "dev": true,
-      "requires": {
-        "acorn": "^5.0.3"
-      }
-    },
     "after": {
       "version": "0.8.2",
       "resolved": "https://registry.npmjs.org/after/-/after-0.8.2.tgz",
@@ -43,12 +34,6 @@
         "json-schema-traverse": "^0.3.0"
       }
     },
-    "ajv-keywords": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-3.2.0.tgz",
-      "integrity": "sha1-6GuBnGAs+IIa1jdBNpjx3sAhhHo=",
-      "dev": true
-    },
     "amdefine": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
@@ -139,27 +124,6 @@
       "integrity": "sha1-FziZ0//Rx9k4PkR5Ul2+J4yrXys=",
       "dev": true
     },
-    "array-union": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/array-union/-/array-union-1.0.2.tgz",
-      "integrity": "sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=",
-      "dev": true,
-      "requires": {
-        "array-uniq": "^1.0.1"
-      }
-    },
-    "array-uniq": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/array-uniq/-/array-uniq-1.0.3.tgz",
-      "integrity": "sha1-r2rId6Jcx/dOBYiUdThY39sk/bY=",
-      "dev": true
-    },
-    "arrify": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz",
-      "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=",
-      "dev": true
-    },
     "asn1": {
       "version": "0.2.4",
       "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
@@ -221,7 +185,7 @@
       "dependencies": {
         "chalk": {
           "version": "1.1.3",
-          "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
           "requires": {
@@ -232,6 +196,12 @@
             "supports-color": "^2.0.0"
           }
         },
+        "js-tokens": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-3.0.2.tgz",
+          "integrity": "sha1-mGbfOVECEw449/mWvOtlRDIJwls=",
+          "dev": true
+        },
         "supports-color": {
           "version": "2.0.0",
           "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
@@ -737,19 +707,9 @@
       "integrity": "sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==",
       "dev": true,
       "requires": {
-        "nice-try": "^1.0.4",
-        "path-key": "^2.0.1",
-        "semver": "^5.5.0",
-        "shebang-command": "^1.2.0",
-        "which": "^1.2.9"
-      },
-      "dependencies": {
-        "semver": {
-          "version": "5.5.1",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-5.5.1.tgz",
-          "integrity": "sha512-PqpAxfrEhlSUWge8dwIp4tZnQ25DIOthpiaHNIthsjEFQD6EvqUKUDM7L8O2rShkFccYo1VjJR0coWfNkCubRw==",
-          "dev": true
-        }
+        "lru-cache": "4.1.2",
+        "shebang-command": "1.2.0",
+        "which": "1.3.0"
       }
     },
     "crypt": {
@@ -846,13 +806,12 @@
       "dev": true
     },
     "define-properties": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/define-properties/-/define-properties-1.1.2.tgz",
-      "integrity": "sha1-g6c/L+pWmJj7c3GTyPhzyvbUXJQ=",
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/define-properties/-/define-properties-1.1.3.tgz",
+      "integrity": "sha512-3MqfYKj2lLzdMSf8ZIZE/V+Zuy+BgD6f164e8K2w7dgnpKArBDerGYpM46IYYcjnkdPNMjPk9A6VFB8+3SKlXQ==",
       "dev": true,
       "requires": {
-        "foreach": "^2.0.5",
-        "object-keys": "^1.0.8"
+        "object-keys": "^1.0.12"
       }
     },
     "deglob": {
@@ -861,37 +820,22 @@
       "integrity": "sha512-2kjwuGGonL7gWE1XU4Fv79+vVzpoQCl0V+boMwWtOQJV2AGDabCwez++nB1Nli/8BabAfZQ/UuHPlp6AymKdWw==",
       "dev": true,
       "requires": {
-        "find-root": "^1.0.0",
-        "glob": "^7.0.5",
-        "ignore": "^3.0.9",
-        "pkg-config": "^1.1.0",
-        "run-parallel": "^1.1.2",
-        "uniq": "^1.0.1"
+        "find-root": "1.1.0",
+        "glob": "7.1.1",
+        "ignore": "3.3.7",
+        "pkg-config": "1.1.1",
+        "run-parallel": "1.1.8",
+        "uniq": "1.0.1"
       },
       "dependencies": {
         "ignore": {
-          "version": "3.3.10",
-          "resolved": "https://registry.npmjs.org/ignore/-/ignore-3.3.10.tgz",
-          "integrity": "sha512-Pgs951kaMm5GXP7MOvxERINe3gsaVjUWFm+UZPSq9xYriQAksyhg0csnS0KXSNRD5NmNdapXEpjxG49+AKh/ug==",
+          "version": "3.3.7",
+          "resolved": "https://registry.npmjs.org/ignore/-/ignore-3.3.7.tgz",
+          "integrity": "sha512-YGG3ejvBNHRqu0559EOxxNFihD0AjpvHlC/pdGKd3X3ofe+CoJkYazwNJYTNebqpPKN+VVQbh4ZFn1DivMNuHA==",
           "dev": true
         }
       }
     },
-    "del": {
-      "version": "2.2.2",
-      "resolved": "https://registry.npmjs.org/del/-/del-2.2.2.tgz",
-      "integrity": "sha1-wSyYHQZ4RshLyvhiz/kw2Qf/0ag=",
-      "dev": true,
-      "requires": {
-        "globby": "^5.0.0",
-        "is-path-cwd": "^1.0.0",
-        "is-path-in-cwd": "^1.0.0",
-        "object-assign": "^4.0.1",
-        "pify": "^2.0.0",
-        "pinkie-promise": "^2.0.0",
-        "rimraf": "^2.2.8"
-      }
-    },
     "delayed-stream": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
@@ -921,12 +865,13 @@
       "dev": true
     },
     "doctrine": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-2.1.0.tgz",
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     },
     "wrap-ansi": {
       "version": "2.1.0",
-      "resolved": "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
       "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
       "dev": true,
       "requires": {

From 4229d83d1b90906524695a4a6e3a0e46a8f0c583 Mon Sep 17 00:00:00 2001
From: Ash Wilson <smashwilson@github.com>
Date: Fri, 20 Apr 2018 14:06:59 -0400
Subject: [PATCH 04/10] Oh right standard

---
 lib/logger.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/logger.js b/lib/logger.js
index 7a04a534..8e1a1c98 100644
--- a/lib/logger.js
+++ b/lib/logger.js
@@ -3,11 +3,11 @@ const fs = require('fs');
 
 class StreamLogger {
   constructor(stream) {
-    this.stream = stream;
+    this.stream = stream
   }
 
   log(...args) {
-    this.stream.out(util.format(...args));
+    this.stream.write(util.format(...args) + '\n')
   }
 }
 

From a494191621daa4f150e3bd508d6e0b478ed98ca1 Mon Sep 17 00:00:00 2001
From: Ash Wilson <smashwilson@github.com>
Date: Fri, 20 Apr 2018 14:15:12 -0400
Subject: [PATCH 05/10] Nodes don't have useful toString()s

---
 lib/registry/tree.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/registry/tree.js b/lib/registry/tree.js
index b8c1db0e..aa1dea21 100644
--- a/lib/registry/tree.js
+++ b/lib/registry/tree.js
@@ -59,7 +59,7 @@ class Tree {
 
     this.root.lookup(pathSegments).when({
       parent: (parent, remaining) => {
-        log('Tree: discovered parent node %s with remaining segments %j.', parent, remaining)
+        log('Tree: discovered parent node with remaining segments %j.', remaining)
 
         // An existing NativeWatcher is watching the same directory or a parent directory of the requested path.
         const existingNative = parent.getNativeWatcher()

From e8a6b30e60c9a15750ef97b5b9f5eecf1702df6e Mon Sep 17 00:00:00 2001
From: Ash Wilson <smashwilson@github.com>
Date: Fri, 20 Apr 2018 14:16:05 -0400
Subject: [PATCH 06/10] Actually run the :shirt:

---
 lib/binding.js      |  2 +-
 lib/logger.js       | 34 +++++++++++++++++-----------------
 lib/path-watcher.js |  2 +-
 3 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/lib/binding.js b/lib/binding.js
index b4f4078f..fc0154bb 100644
--- a/lib/binding.js
+++ b/lib/binding.js
@@ -1,4 +1,4 @@
-const logger = require('./logger');
+const logger = require('./logger')
 
 let watcher = null
 function getWatcher () {
diff --git a/lib/logger.js b/lib/logger.js
index 8e1a1c98..f8ed44fa 100644
--- a/lib/logger.js
+++ b/lib/logger.js
@@ -1,56 +1,56 @@
-const util = require('util');
-const fs = require('fs');
+const util = require('util')
+const fs = require('fs')
 
 class StreamLogger {
-  constructor(stream) {
+  constructor (stream) {
     this.stream = stream
   }
 
-  log(...args) {
+  log (...args) {
     this.stream.write(util.format(...args) + '\n')
   }
 }
 
 const nullLogger = {
-  log() {},
+  log () {}
 }
 
 let activeLogger = null
 
-function disable() {
+function disable () {
   activeLogger = nullLogger
 }
 
-function toStdout() {
+function toStdout () {
   activeLogger = new StreamLogger(process.stdout)
 }
 
-function toStderr() {
+function toStderr () {
   activeLogger = new StreamLogger(process.stderr)
 }
 
-function toFile(filePath) {
+function toFile (filePath) {
   const stream = fs.createWriteStream(filePath, {defaultEncoding: 'utf8', flags: 'a'})
   activeLogger = new StreamLogger(stream)
 }
 
-function fromEnv(value) {
+function fromEnv (value) {
   if (!value) {
-    return disable();
+    return disable()
   } else if (value === 'stdout') {
-    return toStdout();
+    return toStdout()
   } else if (value === 'stderr') {
-    return toStderr();
+    return toStderr()
   } else {
-    return toFile(value);
+    return toFile(value)
   }
 }
 
-function getActiveLogger() {
+function getActiveLogger () {
   if (activeLogger === null) {
     fromEnv(process.env.WATCHER_LOG_JS)
   }
-  return activeLogger;
+  return activeLogger
 }
 
 module.exports = {
@@ -59,5 +59,5 @@ module.exports = {
   toStderr,
   toFile,
   fromEnv,
-  log(...args) { return getActiveLogger().log(...args) }
+  log (...args) { return getActiveLogger().log(...args) }
 }
diff --git a/lib/path-watcher.js b/lib/path-watcher.js
index 35d336a0..eae5a1dc 100644
--- a/lib/path-watcher.js
+++ b/lib/path-watcher.js
@@ -232,7 +232,7 @@ class PathWatcher {
 
     this.subs.add(native.onWillStop(() => {
       if (this.native === native) {
-        log('native %s is stopping.', native);
+        log('native %s is stopping.', native)
         this.subs.dispose()
         this.native = null
       }

From 68fd75cc7ff057a5b7b5fcd7b04265c0b7ab53e8 Mon Sep 17 00:00:00 2001
From: Ash Wilson <smashwilson@github.com>
Date: Mon, 7 Jan 2019 10:15:23 -0500
Subject: [PATCH 07/10] Document the jsLog option in configure()

---
 README.md | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index ffc2dcf8..cb8f6972 100644
--- a/README.md
+++ b/README.md
@@ -66,6 +66,7 @@ Tweak package-global settings. This method may be called even after watchers hav
 const watcher = require('@atom/watcher')
 
 await watcher.configure({
+  jsLog: watcher.STDOUT,
   mainLog: watcher.STDERR,
   workerLog: 'worker.log',
   pollingLog: 'polling.log',
@@ -75,15 +76,17 @@ await watcher.configure({
 })
 ```
 
-`mainLog` configures the logging of events from the main thread, in line with libuv's event loop. It may be one of:
+`jsLog` configures the logging of events from the JavaScript layer. It may be one of:
 
 * A `String` specifying a path to log to a file. Be careful that you don't log to a directory that you're watching :innocent:
 * The constants `watcher.STDERR` or `watcher.STDOUT` to log to the `node` process' standard error or output streams.
 * `watcher.DISABLE` to disable main thread logging. This is the default.
 
-`workerLog` configures logging for the worker thread, which is used to interact with native operating system filesystem watching APIs. It accepts the same arguments as `mainLog` and also defaults to `watcher.DISABLE`.
+`mainLog` configures the logging of events from the main thread, in line with libuv's event loop. It accepts the same arguments as `jsLog` and also defaults to `watcher.DISABLE`.
 
-`pollingLog` configures logging for the polling thread, which polls the filesystem when the worker thread is unable to. The polling thread only launches when at least one path needs to be polled. `pollingLog` accepts the same arguments as `mainLog` and also defaults to `watcher.DISABLE`.
+`workerLog` configures logging for the worker thread, which is used to interact with native operating system filesystem watching APIs. It accepts the same arguments as `jsLog` and also defaults to `watcher.DISABLE`.
+
+`pollingLog` configures logging for the polling thread, which polls the filesystem when the worker thread is unable to. The polling thread only launches when at least one path needs to be polled. `pollingLog` accepts the same arguments as `jsLog` and also defaults to `watcher.DISABLE`.
 
 `workerCacheSize` controls the number of recently seen stat results are cached within the worker thread. Increasing the cache size will improve the reliability of rename correlation and the entry kinds of deleted entries, but will consume more RAM. The default is `4096`.
 

From 1bdf6a09066cf687a9e164182e41b1efb181d3ca Mon Sep 17 00:00:00 2001
From: Ash Wilson <smashwilson@github.com>
Date: Mon, 7 Jan 2019 10:19:19 -0500
Subject: [PATCH 08/10] Document the environment variable logging configuration

---
 README.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/README.md b/README.md
index cb8f6972..bf637f17 100644
--- a/README.md
+++ b/README.md
@@ -156,6 +156,15 @@ const watcher = await watchPath('/var/log', {}, () => {})
 watcher.dispose()
 ```
 
+### Environment variables
+
+Logging may also be configured by setting environment variables. Each of these may be set to an empty string to disable that log, `"stderr"` to output to stderr, `"stdout"` to output to stdout, or a path to write output to a file at that path.
+
+* `WATCHER_LOG_JS`: JavaScript layer logging
+* `WATCHER_LOG_MAIN`: Main thread logging
+* `WATCHER_LOG_WORKER`: Worker thread logging
+* `WATCHER_LOG_POLLING`: Polling thread logging
+
 ## CLI
 
 It's possible to call `@atom/watcher` from the command-line, like this:

From 9ce181c0703b543c249e993c6b7c14c364b9d681 Mon Sep 17 00:00:00 2001
From: Ash Wilson <smashwilson@github.com>
Date: Mon, 7 Jan 2019 10:22:00 -0500
Subject: [PATCH 09/10] Lockfile update

---
 package-lock.json | 68 ++++++++++++++++-------------------------------
 1 file changed, 23 insertions(+), 45 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index 10f6d000..62dfb085 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -707,9 +707,8 @@
       "integrity": "sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==",
       "dev": true,
       "requires": {
-        "lru-cache": "4.1.2",
-        "shebang-command": "1.2.0",
-        "which": "1.3.0"
+        "shebang-command": "^1.2.0",
+        "which": "^1.2.9"
       }
     },
     "crypt": {
@@ -820,12 +819,12 @@
       "integrity": "sha512-2kjwuGGonL7gWE1XU4Fv79+vVzpoQCl0V+boMwWtOQJV2AGDabCwez++nB1Nli/8BabAfZQ/UuHPlp6AymKdWw==",
       "dev": true,
       "requires": {
-        "find-root": "1.1.0",
-        "glob": "7.1.1",
-        "ignore": "3.3.7",
-        "pkg-config": "1.1.1",
-        "run-parallel": "1.1.8",
-        "uniq": "1.0.1"
+        "find-root": "^1.0.0",
+        "glob": "^7.0.5",
+        "ignore": "^3.0.9",
+        "pkg-config": "^1.1.0",
+        "run-parallel": "^1.1.2",
+        "uniq": "^1.0.1"
       },
       "dependencies": {
         "ignore": {
@@ -930,7 +929,7 @@
       "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.1.tgz",
       "integrity": "sha512-1MkrZNvWTKCaigbn+W15elq2BB/L22nqrSY5DKlo3X6+vclJm8Bb5djXJBmEX6fS3+zCh/F4VBK5Z2KxJt4s2Q==",
       "requires": {
-        "iconv-lite": "0.4.21"
+        "once": "^1.4.0"
       }
     },
     "error-ex": {
@@ -1233,10 +1232,11 @@
       "integrity": "sha512-lfVw3TEqThwq0j2Ba/Ckn2ABdwmL5dkOgAux1rvOk6CO7A6yGyPI2+zIxN6FyNkp1X1X/BSvKOceD6mBWSj4Yw==",
       "dev": true,
       "requires": {
-        "ignore": "3.3.7",
-        "minimatch": "3.0.4",
-        "resolve": "1.7.1",
-        "semver": "5.5.0"
+        "eslint-utils": "^1.3.1",
+        "ignore": "^4.0.2",
+        "minimatch": "^3.0.4",
+        "resolve": "^1.8.1",
+        "semver": "^5.5.0"
       },
       "dependencies": {
         "ignore": {
@@ -1326,8 +1326,8 @@
       "integrity": "sha512-kapdTCt1bjmspxStVKX6huolXVV5ZfyZguY1lcfhVVZstce3bqxH9mcLzNn3/mlgW6wQ732+0fuG9v7h0ZQoKg==",
       "dev": true,
       "requires": {
-        "acorn": "5.5.3",
-        "acorn-jsx": "3.0.1"
+        "acorn": "^5.6.0",
+        "acorn-jsx": "^4.1.1"
       },
       "dependencies": {
         "acorn-jsx": {
@@ -1860,6 +1860,7 @@
       "version": "0.4.21",
       "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.21.tgz",
       "integrity": "sha512-En5V9za5mBt2oUA03WGD3TwDv0MKAruqsuxstbMUZaj9W9k/m1CV/9py3l0L5kw9Bln8fdHQmzHSYtvpvTLpKw==",
+      "dev": true,
       "requires": {
         "safer-buffer": "^2.1.0"
       }
@@ -2294,24 +2295,6 @@
         "js-tokens": "^3.0.0 || ^4.0.0"
       }
     },
-    "lru-cache": {
-      "version": "4.1.2",
-      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.2.tgz",
-      "integrity": "sha512-wgeVXhrDwAWnIF/yZARsFnMBtdFXOg1b8RIrhilp+0iDYN4mdQcNZElDZ0e4B64BhaxeQ5zN7PMyvu7we1kPeQ==",
-      "dev": true,
-      "requires": {
-        "pseudomap": "^1.0.2",
-        "yallist": "^2.1.2"
-      },
-      "dependencies": {
-        "yallist": {
-          "version": "2.1.2",
-          "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
-          "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
-          "dev": true
-        }
-      }
-    },
     "md5": {
       "version": "2.2.1",
       "resolved": "https://registry.npmjs.org/md5/-/md5-2.2.1.tgz",
@@ -3126,12 +3109,6 @@
         "object-assign": "^4.1.1"
       }
     },
-    "pseudomap": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/pseudomap/-/pseudomap-1.0.2.tgz",
-      "integrity": "sha1-8FKijacOYYkX7wqKw0wa5aaChrM=",
-      "dev": true
-    },
     "psl": {
       "version": "1.1.29",
       "resolved": "https://registry.npmjs.org/psl/-/psl-1.1.29.tgz",
@@ -3439,7 +3416,8 @@
     "safer-buffer": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
-      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
+      "dev": true
     },
     "semver": {
       "version": "5.3.0",
@@ -3776,10 +3754,10 @@
       "integrity": "sha512-S7rnFITmBH1EnyKcvxBh1LjYeQMmnZtCXSEbHcH6S0NoKit24ZuFO/T1vDcLdYsLQkM188PVVhQmzKIuThNkKg==",
       "dev": true,
       "requires": {
-        "ajv": "5.5.2",
-        "ajv-keywords": "2.1.1",
-        "chalk": "2.4.0",
-        "lodash": "4.17.4",
+        "ajv": "^6.0.1",
+        "ajv-keywords": "^3.0.0",
+        "chalk": "^2.1.0",
+        "lodash": "^4.17.4",
         "slice-ansi": "1.0.0",
         "string-width": "^2.1.1"
       },

From c7178976bbfc46b0150b3680b8a2a4967857c7ad Mon Sep 17 00:00:00 2001
From: Ash Wilson <smashwilson@github.com>
Date: Mon, 7 Jan 2019 10:25:16 -0500
Subject: [PATCH 10/10] Undo undesired lockfile changes

---
 lib/logger.js     |   2 +-
 package-lock.json | 571 ++++++++++++++++++++++++++--------------------
 2 files changed, 330 insertions(+), 243 deletions(-)

diff --git a/lib/logger.js b/lib/logger.js
index f8ed44fa..7bca0037 100644
--- a/lib/logger.js
+++ b/lib/logger.js
@@ -30,7 +30,7 @@ function toStderr () {
 }
 
 function toFile (filePath) {
-  const stream = fs.createWriteStream(filePath, {defaultEncoding: 'utf8', flags: 'a'})
+  const stream = fs.createWriteStream(filePath, { defaultEncoding: 'utf8', flags: 'a' })
   activeLogger = new StreamLogger(stream)
 }
 
diff --git a/package-lock.json b/package-lock.json
index 62dfb085..ae961aff 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,11 +11,20 @@
       "dev": true
     },
     "acorn": {
-      "version": "5.5.3",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.5.3.tgz",
-      "integrity": "sha512-jd5MkIUlbbmb07nXH0DT3y7rDVtkzDi4XZOUVWAer8ajmF/DTSSbl5oNFyDOl/OXA33Bl79+ypHhl2pN20VeOQ==",
+      "version": "5.7.3",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.3.tgz",
+      "integrity": "sha512-T/zvzYRfbVojPWahDsE5evJdHb3oJoQfFbsrKM7w5Zcs++Tr257tia3BmMP8XYVjp1S9RZXQMh7gao96BlqZOw==",
       "dev": true
     },
+    "acorn-jsx": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-4.1.1.tgz",
+      "integrity": "sha512-JY+iV6r+cO21KtntVvFkD+iqjtdpRUpGqKWgfkCdZq1R+kbreEl8EcdcJR4SmiIgsIQT33s6QzheQ9a275Q8xw==",
+      "dev": true,
+      "requires": {
+        "acorn": "^5.0.3"
+      }
+    },
     "after": {
       "version": "0.8.2",
       "resolved": "https://registry.npmjs.org/after/-/after-0.8.2.tgz",
@@ -34,6 +43,12 @@
         "json-schema-traverse": "^0.3.0"
       }
     },
+    "ajv-keywords": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-3.2.0.tgz",
+      "integrity": "sha1-6GuBnGAs+IIa1jdBNpjx3sAhhHo=",
+      "dev": true
+    },
     "amdefine": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
@@ -124,6 +139,27 @@
       "integrity": "sha1-FziZ0//Rx9k4PkR5Ul2+J4yrXys=",
       "dev": true
     },
+    "array-union": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/array-union/-/array-union-1.0.2.tgz",
+      "integrity": "sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=",
+      "dev": true,
+      "requires": {
+        "array-uniq": "^1.0.1"
+      }
+    },
+    "array-uniq": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/array-uniq/-/array-uniq-1.0.3.tgz",
+      "integrity": "sha1-r2rId6Jcx/dOBYiUdThY39sk/bY=",
+      "dev": true
+    },
+    "arrify": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz",
+      "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=",
+      "dev": true
+    },
     "asn1": {
       "version": "0.2.4",
       "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
@@ -185,7 +221,7 @@
       "dependencies": {
         "chalk": {
           "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+          "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
           "requires": {
@@ -196,12 +232,6 @@
             "supports-color": "^2.0.0"
           }
         },
-        "js-tokens": {
-          "version": "3.0.2",
-          "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-3.0.2.tgz",
-          "integrity": "sha1-mGbfOVECEw449/mWvOtlRDIJwls=",
-          "dev": true
-        },
         "supports-color": {
           "version": "2.0.0",
           "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
@@ -707,8 +737,19 @@
       "integrity": "sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==",
       "dev": true,
       "requires": {
+        "nice-try": "^1.0.4",
+        "path-key": "^2.0.1",
+        "semver": "^5.5.0",
         "shebang-command": "^1.2.0",
         "which": "^1.2.9"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "5.5.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.5.1.tgz",
+          "integrity": "sha512-PqpAxfrEhlSUWge8dwIp4tZnQ25DIOthpiaHNIthsjEFQD6EvqUKUDM7L8O2rShkFccYo1VjJR0coWfNkCubRw==",
+          "dev": true
+        }
       }
     },
     "crypt": {
@@ -805,12 +846,13 @@
       "dev": true
     },
     "define-properties": {
-      "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/define-properties/-/define-properties-1.1.3.tgz",
-      "integrity": "sha512-3MqfYKj2lLzdMSf8ZIZE/V+Zuy+BgD6f164e8K2w7dgnpKArBDerGYpM46IYYcjnkdPNMjPk9A6VFB8+3SKlXQ==",
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/define-properties/-/define-properties-1.1.2.tgz",
+      "integrity": "sha1-g6c/L+pWmJj7c3GTyPhzyvbUXJQ=",
       "dev": true,
       "requires": {
-        "object-keys": "^1.0.12"
+        "foreach": "^2.0.5",
+        "object-keys": "^1.0.8"
       }
     },
     "deglob": {
@@ -828,13 +870,28 @@
       },
       "dependencies": {
         "ignore": {
-          "version": "3.3.7",
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