Updated the Survey.

node_modules/nodemon/lib/monitor/watch.js

@@ -0,0 +1,239 @@
+module.exports.watch = watch;
+module.exports.resetWatchers = resetWatchers;
+
+var debug = require('debug')('nodemon:watch');
+var debugRoot = require('debug')('nodemon');
+var chokidar = require('chokidar');
+var undefsafe = require('undefsafe');
+var config = require('../config');
+var path = require('path');
+var utils = require('../utils');
+var bus = utils.bus;
+var match = require('./match');
+var watchers = [];
+var debouncedBus;
+
+bus.on('reset', resetWatchers);
+
+function resetWatchers() {
+  debugRoot('resetting watchers');
+  watchers.forEach(function (watcher) {
+    watcher.close();
+  });
+  watchers = [];
+}
+
+function watch() {
+  if (watchers.length) {
+    debug('early exit on watch, still watching (%s)', watchers.length);
+    return;
+  }
+
+  var dirs = [].slice.call(config.dirs);
+
+  debugRoot('start watch on: %s', dirs.join(', '));
+  const rootIgnored = config.options.ignore;
+  debugRoot('ignored', rootIgnored);
+
+  var watchedFiles = [];
+
+  const promise = new Promise(function (resolve) {
+    const dotFilePattern = /[/\\]\./;
+    var ignored = match.rulesToMonitor(
+      [], // not needed
+      Array.from(rootIgnored),
+      config
+    ).map(pattern => pattern.slice(1));
+
+    const addDotFile = dirs.filter(dir => dir.match(dotFilePattern));
+
+    // don't ignore dotfiles if explicitly watched.
+    if (addDotFile.length === 0) {
+      ignored.push(dotFilePattern);
+    }
+
+    var watchOptions = {
+      ignorePermissionErrors: true,
+      ignored: ignored,
+      persistent: true,
+      usePolling: config.options.legacyWatch || false,
+      interval: config.options.pollingInterval,
+      // note to future developer: I've gone back and forth on adding `cwd`
+      // to the props and in some cases it fixes bugs but typically it causes
+      // bugs elsewhere (since nodemon is used is so many ways). the final
+      // decision is to *not* use it at all and work around it
+      // cwd: ...
+    };
+
+    if (utils.isWindows) {
+      watchOptions.disableGlobbing = true;
+    }
+
+    if (process.env.TEST) {
+      watchOptions.useFsEvents = false;
+    }
+
+    var watcher = chokidar.watch(
+      dirs,
+      Object.assign({}, watchOptions, config.options.watchOptions || {})
+    );
+
+    watcher.ready = false;
+
+    var total = 0;
+
+    watcher.on('change', filterAndRestart);
+    watcher.on('add', function (file) {
+      if (watcher.ready) {
+        return filterAndRestart(file);
+      }
+
+      watchedFiles.push(file);
+      bus.emit('watching', file);
+      debug('chokidar watching: %s', file);
+    });
+    watcher.on('ready', function () {
+      watchedFiles = Array.from(new Set(watchedFiles)); // ensure no dupes
+      total = watchedFiles.length;
+      watcher.ready = true;
+      resolve(total);
+      debugRoot('watch is complete');
+    });
+
+    watcher.on('error', function (error) {
+      if (error.code === 'EINVAL') {
+        utils.log.error(
+          'Internal watch failed. Likely cause: too many ' +
+          'files being watched (perhaps from the root of a drive?\n' +
+          'See https://github.com/paulmillr/chokidar/issues/229 for details'
+        );
+      } else {
+        utils.log.error('Internal watch failed: ' + error.message);
+        process.exit(1);
+      }
+    });
+
+    watchers.push(watcher);
+  });
+
+  return promise.catch(e => {
+    // this is a core error and it should break nodemon - so I have to break
+    // out of a promise using the setTimeout
+    setTimeout(() => {
+      throw e;
+    });
+  }).then(function () {
+    utils.log.detail(`watching ${watchedFiles.length} file${
+      watchedFiles.length === 1 ? '' : 's'}`);
+    return watchedFiles;
+  });
+}
+
+function filterAndRestart(files) {
+  if (!Array.isArray(files)) {
+    files = [files];
+  }
+
+  if (files.length) {
+    var cwd = process.cwd();
+    if (this.options && this.options.cwd) {
+      cwd = this.options.cwd;
+    }
+
+    utils.log.detail(
+      'files triggering change check: ' +
+      files
+        .map(file => {
+          const res = path.relative(cwd, file);
+          return res;
+        })
+        .join(', ')
+    );
+
+    // make sure the path is right and drop an empty
+    // filenames (sometimes on windows)
+    files = files.filter(Boolean).map(file => {
+      return path.relative(process.cwd(), path.relative(cwd, file));
+    });
+
+    if (utils.isWindows) {
+      // ensure the drive letter is in uppercase (c:\foo -> C:\foo)
+      files = files.map(f => {
+        if (f.indexOf(':') === -1) { return f; }
+        return f[0].toUpperCase() + f.slice(1);
+      });
+    }
+
+
+    debug('filterAndRestart on', files);
+
+    var matched = match(
+      files,
+      config.options.monitor,
+      undefsafe(config, 'options.execOptions.ext')
+    );
+
+    debug('matched?', JSON.stringify(matched));
+
+    // if there's no matches, then test to see if the changed file is the
+    // running script, if so, let's allow a restart
+    if (config.options.execOptions && config.options.execOptions.script) {
+      const script = path.resolve(config.options.execOptions.script);
+      if (matched.result.length === 0 && script) {
+        const length = script.length;
+        files.find(file => {
+          if (file.substr(-length, length) === script) {
+            matched = {
+              result: [file],
+              total: 1,
+            };
+            return true;
+          }
+        });
+      }
+    }
+
+    utils.log.detail(
+      'changes after filters (before/after): ' +
+      [files.length, matched.result.length].join('/')
+    );
+
+    // reset the last check so we're only looking at recently modified files
+    config.lastStarted = Date.now();
+
+    if (matched.result.length) {
+      if (config.options.delay > 0) {
+        utils.log.detail('delaying restart for ' + config.options.delay + 'ms');
+        if (debouncedBus === undefined) {
+          debouncedBus = debounce(restartBus, config.options.delay);
+        }
+        debouncedBus(matched);
+      } else {
+        return restartBus(matched);
+      }
+    }
+  }
+}
+
+function restartBus(matched) {
+  utils.log.status('restarting due to changes...');
+  matched.result.map(file => {
+    utils.log.detail(path.relative(process.cwd(), file));
+  });
+
+  if (config.options.verbose) {
+    utils.log._log('');
+  }
+
+  bus.emit('restart', matched.result);
+}
+
+function debounce(fn, delay) {
+  var timer = null;
+  return function () {
+    const context = this;
+    const args = arguments;
+    clearTimeout(timer);
+    timer = setTimeout(() =>fn.apply(context, args), delay);
+  };
+}