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qwen/nodejs/node_modules/jest-haste-map/build/watchers/WatchmanWatcher.js

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+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true
+});
+exports.default = WatchmanWatcher;
+function _assert() {
+  const data = require('assert');
+  _assert = function () {
+    return data;
+  };
+  return data;
+}
+function _events() {
+  const data = require('events');
+  _events = function () {
+    return data;
+  };
+  return data;
+}
+function path() {
+  const data = _interopRequireWildcard(require('path'));
+  path = function () {
+    return data;
+  };
+  return data;
+}
+function _fbWatchman() {
+  const data = _interopRequireDefault(require('fb-watchman'));
+  _fbWatchman = function () {
+    return data;
+  };
+  return data;
+}
+function _gracefulFs() {
+  const data = _interopRequireDefault(require('graceful-fs'));
+  _gracefulFs = function () {
+    return data;
+  };
+  return data;
+}
+var _RecrawlWarning = _interopRequireDefault(require('./RecrawlWarning'));
+var _common = _interopRequireDefault(require('./common'));
+function _interopRequireDefault(obj) {
+  return obj && obj.__esModule ? obj : {default: obj};
+}
+function _getRequireWildcardCache(nodeInterop) {
+  if (typeof WeakMap !== 'function') return null;
+  var cacheBabelInterop = new WeakMap();
+  var cacheNodeInterop = new WeakMap();
+  return (_getRequireWildcardCache = function (nodeInterop) {
+    return nodeInterop ? cacheNodeInterop : cacheBabelInterop;
+  })(nodeInterop);
+}
+function _interopRequireWildcard(obj, nodeInterop) {
+  if (!nodeInterop && obj && obj.__esModule) {
+    return obj;
+  }
+  if (obj === null || (typeof obj !== 'object' && typeof obj !== 'function')) {
+    return {default: obj};
+  }
+  var cache = _getRequireWildcardCache(nodeInterop);
+  if (cache && cache.has(obj)) {
+    return cache.get(obj);
+  }
+  var newObj = {};
+  var hasPropertyDescriptor =
+    Object.defineProperty && Object.getOwnPropertyDescriptor;
+  for (var key in obj) {
+    if (key !== 'default' && Object.prototype.hasOwnProperty.call(obj, key)) {
+      var desc = hasPropertyDescriptor
+        ? Object.getOwnPropertyDescriptor(obj, key)
+        : null;
+      if (desc && (desc.get || desc.set)) {
+        Object.defineProperty(newObj, key, desc);
+      } else {
+        newObj[key] = obj[key];
+      }
+    }
+  }
+  newObj.default = obj;
+  if (cache) {
+    cache.set(obj, newObj);
+  }
+  return newObj;
+}
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+const CHANGE_EVENT = _common.default.CHANGE_EVENT;
+const DELETE_EVENT = _common.default.DELETE_EVENT;
+const ADD_EVENT = _common.default.ADD_EVENT;
+const ALL_EVENT = _common.default.ALL_EVENT;
+const SUB_NAME = 'sane-sub';
+
+/**
+ * Watches `dir`.
+ *
+ * @class PollWatcher
+ * @param String dir
+ * @param {Object} opts
+ * @public
+ */
+
+function WatchmanWatcher(dir, opts) {
+  _common.default.assignOptions(this, opts);
+  this.root = path().resolve(dir);
+  this.init();
+}
+Object.setPrototypeOf(
+  WatchmanWatcher.prototype,
+  _events().EventEmitter.prototype
+);
+
+/**
+ * Run the watchman `watch` command on the root and subscribe to changes.
+ *
+ * @private
+ */
+
+WatchmanWatcher.prototype.init = function () {
+  if (this.client) {
+    this.client.removeAllListeners();
+  }
+  const self = this;
+  this.client = new (_fbWatchman().default.Client)();
+  this.client.on('error', error => {
+    self.emit('error', error);
+  });
+  this.client.on('subscription', this.handleChangeEvent.bind(this));
+  this.client.on('end', () => {
+    console.warn('[sane] Warning: Lost connection to watchman, reconnecting..');
+    self.init();
+  });
+  this.watchProjectInfo = null;
+  function getWatchRoot() {
+    return self.watchProjectInfo ? self.watchProjectInfo.root : self.root;
+  }
+  function onCapability(error, resp) {
+    if (handleError(self, error)) {
+      // The Watchman watcher is unusable on this system, we cannot continue
+      return;
+    }
+    handleWarning(resp);
+    self.capabilities = resp.capabilities;
+    if (self.capabilities.relative_root) {
+      self.client.command(['watch-project', getWatchRoot()], onWatchProject);
+    } else {
+      self.client.command(['watch', getWatchRoot()], onWatch);
+    }
+  }
+  function onWatchProject(error, resp) {
+    if (handleError(self, error)) {
+      return;
+    }
+    handleWarning(resp);
+    self.watchProjectInfo = {
+      relativePath: resp.relative_path ? resp.relative_path : '',
+      root: resp.watch
+    };
+    self.client.command(['clock', getWatchRoot()], onClock);
+  }
+  function onWatch(error, resp) {
+    if (handleError(self, error)) {
+      return;
+    }
+    handleWarning(resp);
+    self.client.command(['clock', getWatchRoot()], onClock);
+  }
+  function onClock(error, resp) {
+    if (handleError(self, error)) {
+      return;
+    }
+    handleWarning(resp);
+    const options = {
+      fields: ['name', 'exists', 'new'],
+      since: resp.clock
+    };
+
+    // If the server has the wildmatch capability available it supports
+    // the recursive **/*.foo style match and we can offload our globs
+    // to the watchman server.  This saves both on data size to be
+    // communicated back to us and compute for evaluating the globs
+    // in our node process.
+    if (self.capabilities.wildmatch) {
+      if (self.globs.length === 0) {
+        if (!self.dot) {
+          // Make sure we honor the dot option if even we're not using globs.
+          options.expression = [
+            'match',
+            '**',
+            'wholename',
+            {
+              includedotfiles: false
+            }
+          ];
+        }
+      } else {
+        options.expression = ['anyof'];
+        for (const i in self.globs) {
+          options.expression.push([
+            'match',
+            self.globs[i],
+            'wholename',
+            {
+              includedotfiles: self.dot
+            }
+          ]);
+        }
+      }
+    }
+    if (self.capabilities.relative_root) {
+      options.relative_root = self.watchProjectInfo.relativePath;
+    }
+    self.client.command(
+      ['subscribe', getWatchRoot(), SUB_NAME, options],
+      onSubscribe
+    );
+  }
+  function onSubscribe(error, resp) {
+    if (handleError(self, error)) {
+      return;
+    }
+    handleWarning(resp);
+    self.emit('ready');
+  }
+  self.client.capabilityCheck(
+    {
+      optional: ['wildmatch', 'relative_root']
+    },
+    onCapability
+  );
+};
+
+/**
+ * Handles a change event coming from the subscription.
+ *
+ * @param {Object} resp
+ * @private
+ */
+
+WatchmanWatcher.prototype.handleChangeEvent = function (resp) {
+  _assert().strict.equal(
+    resp.subscription,
+    SUB_NAME,
+    'Invalid subscription event.'
+  );
+  if (resp.is_fresh_instance) {
+    this.emit('fresh_instance');
+  }
+  if (resp.is_fresh_instance) {
+    this.emit('fresh_instance');
+  }
+  if (Array.isArray(resp.files)) {
+    resp.files.forEach(this.handleFileChange, this);
+  }
+};
+
+/**
+ * Handles a single change event record.
+ *
+ * @param {Object} changeDescriptor
+ * @private
+ */
+
+WatchmanWatcher.prototype.handleFileChange = function (changeDescriptor) {
+  const self = this;
+  let absPath;
+  let relativePath;
+  if (this.capabilities.relative_root) {
+    relativePath = changeDescriptor.name;
+    absPath = path().join(
+      this.watchProjectInfo.root,
+      this.watchProjectInfo.relativePath,
+      relativePath
+    );
+  } else {
+    absPath = path().join(this.root, changeDescriptor.name);
+    relativePath = changeDescriptor.name;
+  }
+  if (
+    !(self.capabilities.wildmatch && !this.hasIgnore) &&
+    !_common.default.isFileIncluded(
+      this.globs,
+      this.dot,
+      this.doIgnore,
+      relativePath
+    )
+  ) {
+    return;
+  }
+  if (!changeDescriptor.exists) {
+    self.emitEvent(DELETE_EVENT, relativePath, self.root);
+  } else {
+    _gracefulFs().default.lstat(absPath, (error, stat) => {
+      // Files can be deleted between the event and the lstat call
+      // the most reliable thing to do here is to ignore the event.
+      if (error && error.code === 'ENOENT') {
+        return;
+      }
+      if (handleError(self, error)) {
+        return;
+      }
+      const eventType = changeDescriptor.new ? ADD_EVENT : CHANGE_EVENT;
+
+      // Change event on dirs are mostly useless.
+      if (!(eventType === CHANGE_EVENT && stat.isDirectory())) {
+        self.emitEvent(eventType, relativePath, self.root, stat);
+      }
+    });
+  }
+};
+
+/**
+ * Dispatches the event.
+ *
+ * @param {string} eventType
+ * @param {string} filepath
+ * @param {string} root
+ * @param {fs.Stat} stat
+ * @private
+ */
+
+WatchmanWatcher.prototype.emitEvent = function (
+  eventType,
+  filepath,
+  root,
+  stat
+) {
+  this.emit(eventType, filepath, root, stat);
+  this.emit(ALL_EVENT, eventType, filepath, root, stat);
+};
+
+/**
+ * Closes the watcher.
+ *
+ */
+
+WatchmanWatcher.prototype.close = function () {
+  this.client.removeAllListeners();
+  this.client.end();
+  return Promise.resolve();
+};
+
+/**
+ * Handles an error and returns true if exists.
+ *
+ * @param {WatchmanWatcher} self
+ * @param {Error} error
+ * @private
+ */
+
+function handleError(self, error) {
+  if (error != null) {
+    self.emit('error', error);
+    return true;
+  } else {
+    return false;
+  }
+}
+
+/**
+ * Handles a warning in the watchman resp object.
+ *
+ * @param {object} resp
+ * @private
+ */
+
+function handleWarning(resp) {
+  if ('warning' in resp) {
+    if (_RecrawlWarning.default.isRecrawlWarningDupe(resp.warning)) {
+      return true;
+    }
+    console.warn(resp.warning);
+    return true;
+  } else {
+    return false;
+  }
+}