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node_modules/gaze/lib/gaze.js

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+/*
+ * gaze
+ * https://github.com/shama/gaze
+ *
+ * Copyright (c) 2018 Kyle Robinson Young
+ * Licensed under the MIT license.
+ */
+
+'use strict';
+
+// libs
+var util = require('util');
+var EE = require('events').EventEmitter;
+var fs = require('fs');
+var path = require('path');
+var globule = require('globule');
+var helper = require('./helper');
+
+// shim setImmediate for node v0.8
+var setImmediate = require('timers').setImmediate;
+if (typeof setImmediate !== 'function') {
+  setImmediate = process.nextTick;
+}
+
+// globals
+var delay = 10;
+
+// `Gaze` EventEmitter object to return in the callback
+function Gaze (patterns, opts, done) {
+  var self = this;
+  EE.call(self);
+
+  // If second arg is the callback
+  if (typeof opts === 'function') {
+    done = opts;
+    opts = {};
+  }
+
+  // Default options
+  opts = opts || {};
+  opts.mark = true;
+  opts.interval = opts.interval || 100;
+  opts.debounceDelay = opts.debounceDelay || 500;
+  opts.cwd = opts.cwd || process.cwd();
+  this.options = opts;
+
+  // Default done callback
+  done = done || function () {};
+
+  // Remember our watched dir:files
+  this._watched = Object.create(null);
+
+  // Store watchers
+  this._watchers = Object.create(null);
+
+  // Store watchFile listeners
+  this._pollers = Object.create(null);
+
+  // Store patterns
+  this._patterns = [];
+
+  // Cached events for debouncing
+  this._cached = Object.create(null);
+
+  // Set maxListeners
+  if (this.options.maxListeners != null) {
+    this.setMaxListeners(this.options.maxListeners);
+    Gaze.super_.prototype.setMaxListeners(this.options.maxListeners);
+    delete this.options.maxListeners;
+  }
+
+  // Initialize the watch on files
+  if (patterns) {
+    this.add(patterns, done);
+  }
+
+  // keep the process alive
+  this._keepalive = setInterval(function () {}, 200);
+
+  return this;
+}
+util.inherits(Gaze, EE);
+
+// Main entry point. Start watching and call done when setup
+module.exports = function gaze (patterns, opts, done) {
+  return new Gaze(patterns, opts, done);
+};
+module.exports.Gaze = Gaze;
+
+// Override the emit function to emit `all` events
+// and debounce on duplicate events per file
+Gaze.prototype.emit = function () {
+  var self = this;
+  var args = arguments;
+
+  var e = args[0];
+  var filepath = args[1];
+  var timeoutId;
+
+  // If not added/deleted/changed/renamed then just emit the event
+  if (e.slice(-2) !== 'ed') {
+    Gaze.super_.prototype.emit.apply(self, args);
+    return this;
+  }
+
+  // Detect rename event, if added and previous deleted is in the cache
+  if (e === 'added') {
+    Object.keys(this._cached).forEach(function (oldFile) {
+      if (self._cached[oldFile].indexOf('deleted') !== -1) {
+        args[0] = e = 'renamed';
+        [].push.call(args, oldFile);
+        delete self._cached[oldFile];
+        return false;
+      }
+    });
+  }
+
+  // If cached doesnt exist, create a delay before running the next
+  // then emit the event
+  var cache = this._cached[filepath] || [];
+  if (cache.indexOf(e) === -1) {
+    helper.objectPush(self._cached, filepath, e);
+    clearTimeout(timeoutId);
+    timeoutId = setTimeout(function () {
+      delete self._cached[filepath];
+    }, this.options.debounceDelay);
+    // Emit the event and `all` event
+    Gaze.super_.prototype.emit.apply(self, args);
+    Gaze.super_.prototype.emit.apply(self, ['all', e].concat([].slice.call(args, 1)));
+  }
+
+  // Detect if new folder added to trigger for matching files within folder
+  if (e === 'added') {
+    if (helper.isDir(filepath)) {
+      // It's possible that between `isDir` and `readdirSync()` calls the `filepath`
+      // gets removed, which will result in `ENOENT` exception
+
+      var files;
+
+      try {
+        files = fs.readdirSync(filepath);
+      } catch (e) {
+        // Rethrow the error if it's anything other than `ENOENT`
+        if (e.code !== 'ENOENT') {
+          throw e;
+        }
+
+        files = [];
+      }
+
+      files.map(function (file) {
+        return path.join(filepath, file);
+      }).filter(function (file) {
+        return globule.isMatch(self._patterns, file, self.options);
+      }).forEach(function (file) {
+        self.emit('added', file);
+      });
+    }
+  }
+
+  return this;
+};
+
+// Close watchers
+Gaze.prototype.close = function (_reset) {
+  var self = this;
+  Object.keys(self._watchers).forEach(function (file) {
+    self._watchers[file].close();
+  });
+  self._watchers = Object.create(null);
+  Object.keys(this._watched).forEach(function (dir) {
+    self._unpollDir(dir);
+  });
+  if (_reset !== false) {
+    self._watched = Object.create(null);
+    setTimeout(function () {
+      self.emit('end');
+      self.removeAllListeners();
+      clearInterval(self._keepalive);
+    }, delay + 100);
+  }
+  return self;
+};
+
+// Add file patterns to be watched
+Gaze.prototype.add = function (files, done) {
+  if (typeof files === 'string') { files = [files]; }
+  this._patterns = helper.unique.apply(null, [this._patterns, files]);
+  files = globule.find(this._patterns, this.options);
+  this._addToWatched(files);
+  this.close(false);
+  this._initWatched(done);
+};
+
+// Dont increment patterns and dont call done if nothing added
+Gaze.prototype._internalAdd = function (file, done) {
+  var files = [];
+  if (helper.isDir(file)) {
+    files = [helper.markDir(file)].concat(globule.find(this._patterns, this.options));
+  } else {
+    if (globule.isMatch(this._patterns, file, this.options)) {
+      files = [file];
+    }
+  }
+  if (files.length > 0) {
+    this._addToWatched(files);
+    this.close(false);
+    this._initWatched(done);
+  }
+};
+
+// Remove file/dir from `watched`
+Gaze.prototype.remove = function (file) {
+  var self = this;
+  if (this._watched[file]) {
+    // is dir, remove all files
+    this._unpollDir(file);
+    delete this._watched[file];
+  } else {
+    // is a file, find and remove
+    Object.keys(this._watched).forEach(function (dir) {
+      var index = self._watched[dir].indexOf(file);
+      if (index !== -1) {
+        self._unpollFile(file);
+        self._watched[dir].splice(index, 1);
+        return false;
+      }
+    });
+  }
+  if (this._watchers[file]) {
+    this._watchers[file].close();
+  }
+  return this;
+};
+
+// Return watched files
+Gaze.prototype.watched = function () {
+  return this._watched;
+};
+
+// Returns `watched` files with relative paths to process.cwd()
+Gaze.prototype.relative = function (dir, unixify) {
+  var self = this;
+  var relative = Object.create(null);
+  var relDir, relFile, unixRelDir;
+  var cwd = this.options.cwd || process.cwd();
+  if (dir === '') { dir = '.'; }
+  dir = helper.markDir(dir);
+  unixify = unixify || false;
+  Object.keys(this._watched).forEach(function (dir) {
+    relDir = path.relative(cwd, dir) + path.sep;
+    if (relDir === path.sep) { relDir = '.'; }
+    unixRelDir = unixify ? helper.unixifyPathSep(relDir) : relDir;
+    relative[unixRelDir] = self._watched[dir].map(function (file) {
+      relFile = path.relative(path.join(cwd, relDir) || '', file || '');
+      if (helper.isDir(file)) {
+        relFile = helper.markDir(relFile);
+      }
+      if (unixify) {
+        relFile = helper.unixifyPathSep(relFile);
+      }
+      return relFile;
+    });
+  });
+  if (dir && unixify) {
+    dir = helper.unixifyPathSep(dir);
+  }
+  return dir ? relative[dir] || [] : relative;
+};
+
+// Adds files and dirs to watched
+Gaze.prototype._addToWatched = function (files) {
+  var dirs = [];
+
+  for (var i = 0; i < files.length; i++) {
+    var file = files[i];
+    var filepath = path.resolve(this.options.cwd, file);
+
+    var dirname = (helper.isDir(file)) ? filepath : path.dirname(filepath);
+    dirname = helper.markDir(dirname);
+
+    // If a new dir is added
+    if (helper.isDir(file) && !(dirname in this._watched)) {
+      helper.objectPush(this._watched, dirname, []);
+    }
+
+    if (file.slice(-1) === '/') { filepath += path.sep; }
+    helper.objectPush(this._watched, path.dirname(filepath) + path.sep, filepath);
+
+    dirs.push(dirname);
+  }
+
+  dirs = helper.unique(dirs);
+
+  for (var k = 0; k < dirs.length; k++) {
+    dirname = dirs[k];
+    // add folders into the mix
+    var readdir = fs.readdirSync(dirname);
+    for (var j = 0; j < readdir.length; j++) {
+      var dirfile = path.join(dirname, readdir[j]);
+      if (fs.lstatSync(dirfile).isDirectory()) {
+        helper.objectPush(this._watched, dirname, dirfile + path.sep);
+      }
+    }
+  }
+
+  return this;
+};
+
+Gaze.prototype._watchDir = function (dir, done) {
+  var self = this;
+  var timeoutId;
+  try {
+    this._watchers[dir] = fs.watch(dir, function (event) {
+      // race condition. Let's give the fs a little time to settle down. so we
+      // don't fire events on non existent files.
+      clearTimeout(timeoutId);
+      timeoutId = setTimeout(function () {
+        // race condition. Ensure that this directory is still being watched
+        // before continuing.
+        if ((dir in self._watchers) && fs.existsSync(dir)) {
+          done(null, dir);
+        }
+      }, delay + 100);
+    });
+
+    this._watchers[dir].on('error', function (err) {
+      self._handleError(err);
+    });
+  } catch (err) {
+    return this._handleError(err);
+  }
+  return this;
+};
+
+Gaze.prototype._unpollFile = function (file) {
+  if (this._pollers[file]) {
+    fs.unwatchFile(file, this._pollers[file]);
+    delete this._pollers[file];
+  }
+  return this;
+};
+
+Gaze.prototype._unpollDir = function (dir) {
+  this._unpollFile(dir);
+  for (var i = 0; i < this._watched[dir].length; i++) {
+    this._unpollFile(this._watched[dir][i]);
+  }
+};
+
+Gaze.prototype._pollFile = function (file, done) {
+  var opts = { persistent: true, interval: this.options.interval };
+  if (!this._pollers[file]) {
+    this._pollers[file] = function (curr, prev) {
+      done(null, file);
+    };
+    try {
+      fs.watchFile(file, opts, this._pollers[file]);
+    } catch (err) {
+      return this._handleError(err);
+    }
+  }
+  return this;
+};
+
+// Initialize the actual watch on `watched` files
+Gaze.prototype._initWatched = function (done) {
+  var self = this;
+  var cwd = this.options.cwd || process.cwd();
+  var curWatched = Object.keys(self._watched);
+
+  // if no matching files
+  if (curWatched.length < 1) {
+    // Defer to emitting to give a chance to attach event handlers.
+    setImmediate(function () {
+      self.emit('ready', self);
+      if (done) { done.call(self, null, self); }
+      self.emit('nomatch');
+    });
+    return;
+  }
+
+  helper.forEachSeries(curWatched, function (dir, next) {
+    dir = dir || '';
+    var files = self._watched[dir];
+    // Triggered when a watched dir has an event
+    self._watchDir(dir, function (event, dirpath) {
+      var relDir = cwd === dir ? '.' : path.relative(cwd, dir);
+      relDir = relDir || '';
+
+      fs.readdir(dirpath, function (err, current) {
+        if (err) { return self.emit('error', err); }
+        if (!current) { return; }
+
+        try {
+          // append path.sep to directories so they match previous.
+          current = current.map(function (curPath) {
+            if (fs.existsSync(path.join(dir, curPath)) && fs.lstatSync(path.join(dir, curPath)).isDirectory()) {
+              return curPath + path.sep;
+            } else {
+              return curPath;
+            }
+          });
+        } catch (err) {
+          // race condition-- sometimes the file no longer exists
+        }
+
+        // Get watched files for this dir
+        var previous = self.relative(relDir);
+
+        // If file was deleted
+        previous.filter(function (file) {
+          return current.indexOf(file) < 0;
+        }).forEach(function (file) {
+          if (!helper.isDir(file)) {
+            var filepath = path.join(dir, file);
+            self.remove(filepath);
+            self.emit('deleted', filepath);
+          }
+        });
+
+        // If file was added
+        current.filter(function (file) {
+          return previous.indexOf(file) < 0;
+        }).forEach(function (file) {
+          // Is it a matching pattern?
+          var relFile = path.join(relDir, file);
+          // Add to watch then emit event
+          self._internalAdd(relFile, function () {
+            self.emit('added', path.join(dir, file));
+          });
+        });
+      });
+    });
+
+    // Watch for change/rename events on files
+    files.forEach(function (file) {
+      if (helper.isDir(file)) { return; }
+      self._pollFile(file, function (err, filepath) {
+        if (err) {
+          self.emit('error', err);
+          return;
+        }
+        // Only emit changed if the file still exists
+        // Prevents changed/deleted duplicate events
+        if (fs.existsSync(filepath)) {
+          self.emit('changed', filepath);
+        }
+      });
+    });
+
+    next();
+  }, function () {
+    // Return this instance of Gaze
+    // delay before ready solves a lot of issues
+    setTimeout(function () {
+      self.emit('ready', self);
+      if (done) { done.call(self, null, self); }
+    }, delay + 100);
+  });
+};
+
+// If an error, handle it here
+Gaze.prototype._handleError = function (err) {
+  if (err.code === 'EMFILE') {
+    return this.emit('error', new Error('EMFILE: Too many opened files.'));
+  }
+  return this.emit('error', err);
+};

node_modules/gaze/lib/helper.js

@@ -0,0 +1,84 @@
+'use strict';
+
+var path = require('path');
+var helper = module.exports = {};
+
+// Returns boolean whether filepath is dir terminated
+helper.isDir = function isDir (dir) {
+  if (typeof dir !== 'string') {
+    return false;
+  }
+  return (dir.slice(-(path.sep.length)) === path.sep);
+};
+
+// Create a `key:[]` if doesnt exist on `obj` then push or concat the `val`
+helper.objectPush = function objectPush (obj, key, val) {
+  if (obj[key] == null) {
+    obj[key] = [];
+  }
+  if (Array.isArray(val)) {
+    obj[key] = obj[key].concat(val);
+  } else if (val) {
+    obj[key].push(val);
+  }
+  obj[key] = helper.unique(obj[key]);
+  return obj[key];
+};
+
+// Ensures the dir is marked with path.sep
+helper.markDir = function markDir (dir) {
+  if (typeof dir === 'string' &&
+    dir.slice(-(path.sep.length)) !== path.sep &&
+    dir !== '.') {
+    dir += path.sep;
+  }
+  return dir;
+};
+
+// Changes path.sep to unix ones for testing
+helper.unixifyPathSep = function unixifyPathSep (filepath) {
+  return (process.platform === 'win32') ? String(filepath).replace(/\\/g, '/') : filepath;
+};
+
+/**
+ * Lo-Dash 1.0.1 <http://lodash.com/>
+ * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
+ * Based on Underscore.js 1.4.4 <http://underscorejs.org/>
+ * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud Inc.
+ * Available under MIT license <http://lodash.com/license>
+ */
+helper.unique = function unique () {
+  var array = Array.prototype.concat.apply(Array.prototype, arguments);
+  var result = [];
+  for (var i = 0; i < array.length; i++) {
+    if (result.indexOf(array[i]) === -1) {
+      result.push(array[i]);
+    }
+  }
+  return result;
+};
+
+/**
+ * Copyright (c) 2010 Caolan McMahon
+ * Available under MIT license <https://raw.github.com/caolan/async/master/LICENSE>
+ */
+helper.forEachSeries = function forEachSeries (arr, iterator, callback) {
+  if (!arr.length) { return callback(); }
+  var completed = 0;
+  var iterate = function () {
+    iterator(arr[completed], function (err) {
+      if (err) {
+        callback(err);
+        callback = function () {};
+      } else {
+        completed += 1;
+        if (completed === arr.length) {
+          callback(null);
+        } else {
+          iterate();
+        }
+      }
+    });
+  };
+  iterate();
+};