set _inProgress back to false if a restart will not happen because there is no pending package

Author: scottbommarito

RestartManager.js

@@ -1,8 +1,9 @@
 const log = require("./logging");
 const NativeCodePush = require("react-native").NativeModules.CodePush;
+const CodePush = require("./CodePush");
 
 const RestartManager = (() => {
-    let _in_progress = false;
+    let _inProgress = false;
     let _allowed = true;
     let _restartPending = false;
 
@@ -26,12 +27,13 @@ const RestartManager = (() => {
     }
 
     function restartApp(onlyIfUpdateIsPending = false) {
-        if (_in_progress) {
-            log("A restart request is already in progress or queued");
-            return;
-        }
-        _in_progress = true;
         if (_allowed) {
+            if (_inProgress) {
+                log("A restart request is already in progress or queued");
+                return;
+            }
+            // The restart won't execute if `onlyIfUpdateIsPending === true` and there is no pending update.
+            _inProgress = !onlyIfUpdateIsPending || !!(NativeCodePush.getUpdateMetadata(CodePush.UpdateState.PENDING));
             NativeCodePush.restartApp(onlyIfUpdateIsPending);
             log("Restarting app");
         } else {