Updates from Mon Mar 2

- [ReactNative] Move merge & mergeInto from downstream to vendor | Christopher Chedeau
- [ReactNative] Replace all the call sites of mergeInto by Object.assign | Christopher Chedeau
- [WIP] Migrated View Managers over to new architecture | Nick Lockwood
- [ReactNative] Replace all the call sites of copyProperties by Object.assign | Christopher Chedeau
- [ReactNative] Migrate navigator.geolocation to open source | Christopher Chedeau
- [ReactNative] Remove README.md, LICENSE and .travis.yml from fbobjc | Christopher Chedeau
- [react-packager] Better transform errors | Amjad Masad
- [React Native][react-packager] Fix test runner and fialing tests | Amjad Masad

Libraries/GeoLocation/GeoLocation.js

@@ -0,0 +1,98 @@
+/**
+ * Copyright 2004-present Facebook. All Rights Reserved.
+ *
+ * @providesModule GeoLocation
+ */
+'use strict';
+
+var RCTDeviceEventEmitter = require('RCTDeviceEventEmitter');
+var RCTLocationObserver = require('NativeModules').RKLocationObserver;
+
+var invariant = require('invariant');
+var logError = require('logError');
+var warning = require('warning');
+
+var subscriptions = [];
+
+var updatesEnabled = false;
+
+var ensureObserving = function() {
+  if (!updatesEnabled) {
+    RCTLocationObserver.startObserving();
+    updatesEnabled = true;
+  }
+};
+
+/**
+ * /!\ ATTENTION /!\
+ * You need to add NSLocationWhenInUseUsageDescription key
+ * in Info.plist to enable geolocation, otherwise it's going
+ * to *fail silently*!
+ * \!/           \!/
+ *
+ * GeoLocation follows the MDN specification:
+ * https://developer.mozilla.org/en-US/docs/Web/API/Geolocation
+ */
+class GeoLocation {
+  static getCurrentPosition(geo_success, geo_error, geo_options) {
+    invariant(
+      typeof geo_success === 'function',
+      'Must provide a valid geo_success callback.'
+    );
+    if (geo_options) {
+      warning('geo_options are not yet supported.');
+    }
+    ensureObserving();
+    RCTLocationObserver.getCurrentPosition(
+      geo_success,
+      geo_error || logError
+    );
+  }
+  static watchPosition(callback) {
+    ensureObserving();
+    var watchID = subscriptions.length;
+    subscriptions.push(
+      RCTDeviceEventEmitter.addListener(
+        'geoLocationDidChange',
+        callback
+      )
+    );
+    return watchID;
+  }
+  static clearWatch(watchID) {
+    var sub = subscriptions[watchID];
+    if (!sub) {
+      // Silently exit when the watchID is invalid or already cleared
+      // This is consistent with timers
+      return;
+    }
+    sub.remove();
+    subscriptions[watchID] = undefined;
+    var noWatchers = true;
+    for (var ii = 0; ii < subscriptions.length; ii++) {
+      if (subscriptions[ii]) {
+        noWatchers = false; // still valid subscriptions
+      }
+    }
+    if (noWatchers) {
+      GeoLocation.stopObserving();
+    }
+  }
+  static stopObserving() {
+    if (updatesEnabled) {
+      RCTLocationObserver.stopObserving();
+      updatesEnabled = false;
+      for (var ii = 0; ii < subscriptions.length; ii++) {
+        if (subscriptions[ii]) {
+          warning('Called stopObserving with existing subscriptions.');
+          subscriptions[ii].remove();
+        }
+      }
+      subscriptions = [];
+    } else {
+      warning('Tried to stop observing when not observing.');
+    }
+  }
+}
+
+module.exports = GeoLocation;