fix: remove possible duplicate entries

Author: ReeceM

CHANGELOG.md

@@ -6,6 +6,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+
+## [0.4.3] - 2022-07-28
+### Fixed
+- Error where sometimes in NextJS duplicate entries were saved in the sitemap.
+
 ## [0.4.0] - 2021-07-24
 
 ### Feature
@@ -66,7 +71,10 @@ First kind of functional version of the package and it also has the ability to h
 - Docs and such
 
 [Unreleased]: https://github.com/reecem/prismic-sitemap/compare/v0.3.1...HEAD
-[0.4.0]: https://github.com/reecem/prismic-sitemap/compare/v0.4.0...HEAD
+[0.4.3]: https://github.com/reecem/prismic-sitemap/compare/v0.4.3...HEAD
+[0.4.2]: https://github.com/reecem/prismic-sitemap/compare/v0.4.2...v0.4.3
+[0.4.1]: https://github.com/reecem/prismic-sitemap/compare/v0.4.1...v0.4.2
+[0.4.0]: https://github.com/reecem/prismic-sitemap/compare/v0.4.0...v0.4.1
 [0.3.1]: https://github.com/reecem/prismic-sitemap/compare/v0.3.1...v0.4.0
 [0.3.0]: https://github.com/reecem/prismic-sitemap/compare/v0.3.0...v0.3.1
 [0.2.0]: https://github.com/reecem/prismic-sitemap/compare/v0.2.0

index.js

@@ -1,6 +1,8 @@
 const generator = require('./generator');
 const path = require('path');
 
+let isRunning = false;
+
 module.exports = (nextConfig) => ({
   ...nextConfig,
   webpack(config, options) {
@@ -11,9 +13,11 @@ module.exports = (nextConfig) => ({
     } = options;
 
 
-    if (isServer) {
+    if (isServer && isRunning == false) {
       console.log('[Sitemap Generator]: Generating Sitemap');
 
+      isRunning = true;
+
       if (typeof sitemap.publicPath === 'undefined') {
         sitemap.publicPath = path.join(options.dir, 'public');
       }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@reecem/prismic-sitemap",
-  "version": "0.4.2",
+  "version": "0.4.3",
   "description": "Sitemap Generator for Prismic and Next.js with Minimal Configuration",
   "keywords": [
     "javascript",