fix: respect falsy sitemapsPathPrefix

Fixes #368

Author: harlan-zw

Diff for: docs/content/2.guides/0.multi-sitemaps.md

@@ -60,7 +60,7 @@ combined with changing the sitemap key to what you'd like the name to be.
 ```ts
 export default defineNuxtConfig({
    sitemap: {
-      sitemapsPathPrefix: '/',
+      sitemapsPathPrefix: '/', // or false
       sitemaps: {
          // will be available at /sitemap-foo.xml
          ['sitemap-foo']: {

Diff for: docs/content/4.api/0.config.md

@@ -169,6 +169,13 @@ without documentDriven mode.
 
 The time in seconds to cache the sitemaps.
 
+## `sitemapsPathPrefix`
+
+- Type: `string | false`
+- Default: `/__sitemap__/`
+
+The path prefix for the sitemaps when using multiple sitemaps.
+
 ## `runtimeCacheStorage`
 
 - Type: `boolean | (Record<string, any> & { driver: string })`

Diff for: src/module.ts

@@ -338,7 +338,7 @@ declare module 'vue-router' {
       nuxt.options.nitro.routeRules['/sitemap_index.xml'] = routeRules
       if (typeof config.sitemaps === 'object') {
         for (const k in config.sitemaps) {
-          nuxt.options.nitro.routeRules[joinURL(config.sitemapsPathPrefix, `/${k}.xml`)] = routeRules
+          nuxt.options.nitro.routeRules[joinURL(config.sitemapsPathPrefix || '', `/${k}.xml`)] = routeRules
         }
       }
       else {
@@ -475,12 +475,25 @@ declare module 'vue-router' {
         lazy: true,
         middleware: false,
       })
-      addServerHandler({
-        route: joinURL(config.sitemapsPathPrefix, `/**:sitemap`),
-        handler: resolve('./runtime/server/routes/sitemap/[sitemap].xml'),
-        lazy: true,
-        middleware: false,
-      })
+      if (config.sitemapsPathPrefix && config.sitemapsPathPrefix !== '/') {
+        addServerHandler({
+          route: joinURL(config.sitemapsPathPrefix, `/**:sitemap`),
+          handler: resolve('./runtime/server/routes/sitemap/[sitemap].xml'),
+          lazy: true,
+          middleware: false,
+        })
+      }
+      else {
+        // register each key as a route
+        for (const sitemapName of Object.keys(config.sitemaps || {})) {
+          addServerHandler({
+            route: withLeadingSlash(`${sitemapName}.xml`),
+            handler: resolve('./runtime/server/routes/sitemap/[sitemap].xml'),
+            lazy: true,
+            middleware: false,
+          })
+        }
+      }
       sitemaps.index = {
         sitemapName: 'index',
         _route: withBase('sitemap_index.xml', nuxt.options.app.baseURL || '/'),
@@ -495,7 +508,7 @@ declare module 'vue-router' {
           sitemaps[sitemapName as keyof typeof sitemaps] = defu(
             {
               sitemapName,
-              _route: withBase(joinURL(config.sitemapsPathPrefix, `${sitemapName}.xml`), nuxt.options.app.baseURL || '/'),
+              _route: withBase(joinURL(config.sitemapsPathPrefix || '', `${sitemapName}.xml`), nuxt.options.app.baseURL || '/'),
               _hasSourceChunk: typeof definition.urls !== 'undefined' || definition.sources?.length,
             },
             { ...definition, urls: undefined, sources: undefined },

Diff for: src/runtime/server/routes/sitemap/[sitemap].xml.ts

@@ -8,7 +8,7 @@ export default defineEventHandler(async (e) => {
   const { sitemaps } = runtimeConfig
 
   const sitemapName = withoutLeadingSlash(withoutTrailingSlash((getRouterParam(e, 'sitemap') || e.path)?.replace('.xml', '')
-    .replace(runtimeConfig.sitemapsPathPrefix, '')))
+    .replace(runtimeConfig.sitemapsPathPrefix || '', '')))
   // check if sitemapName can be cast to a number safely
   const isChunking = typeof sitemaps.chunks !== 'undefined' && !Number.isNaN(Number(sitemapName))
   if (!sitemapName || (!(sitemapName in sitemaps) && !isChunking)) {

Diff for: src/runtime/server/routes/sitemap_index.xml.ts

@@ -19,7 +19,7 @@ export default defineEventHandler(async (e) => {
       e,
       'x-nitro-prerender',
       sitemaps.filter(entry => !!entry._sitemapName)
-        .map(entry => encodeURIComponent(joinURL(runtimeConfig.sitemapsPathPrefix, `/${entry._sitemapName}.xml`))).join(', '),
+        .map(entry => encodeURIComponent(joinURL(runtimeConfig.sitemapsPathPrefix || '', `/${entry._sitemapName}.xml`))).join(', '),
     )
   }
 

Diff for: src/runtime/server/sitemap/builder/sitemap-index.ts

@@ -72,7 +72,7 @@ export async function buildSitemapIndex(resolvers: NitroUrlResolvers, runtimeCon
     const sitemap = chunks[name]
     const entry: SitemapIndexEntry = {
       _sitemapName: name,
-      sitemap: resolvers.canonicalUrlResolver(joinURL(sitemapsPathPrefix, `/${name}.xml`)),
+      sitemap: resolvers.canonicalUrlResolver(joinURL(sitemapsPathPrefix || '', `/${name}.xml`)),
     }
     let lastmod = sitemap.urls
       .filter(a => !!a?.lastmod)

Diff for: src/runtime/types.ts

@@ -49,7 +49,7 @@ export interface ModuleOptions extends SitemapDefinition {
    *
    * @default /__sitemap__/
    */
-  sitemapsPathPrefix: string
+  sitemapsPathPrefix: string | false
   /**
    * Sitemaps to append to the sitemap index.
    *