From 62dfff5818af2c02194feef36a1b18ff4b59e8a3 Mon Sep 17 00:00:00 2001
From: Bobbie Goede <bobbiegoede@gmail.com>
Date: Tue, 2 Apr 2024 18:57:20 +0200
Subject: [PATCH] fix: ignore root when prerendering using `strategy: 'prefix'`
 (#2894)

---
 src/module.ts | 19 +++++++++++++++++++
 src/pages.ts  |  7 +++++++
 2 files changed, 26 insertions(+)

diff --git a/src/module.ts b/src/module.ts
index 031747345..14523c25c 100644
--- a/src/module.ts
+++ b/src/module.ts
@@ -197,6 +197,25 @@ export default defineNuxtModule<NuxtI18nOptions>({
       await setupPages(options, nuxt)
     }
 
+    /**
+     * ignore `/` during prerender when using prefixed routing
+     */
+
+    if (options.strategy === 'prefix' && nuxt.options._generate) {
+      const localizedEntryPages = normalizedLocales.map(x => ['/', x.code].join(''))
+      nuxt.hook('nitro:config', config => {
+        config.prerender ??= {}
+
+        // ignore `/` which is added by nitro by default
+        config.prerender.ignore ??= []
+        config.prerender.ignore.push(/^\/$/)
+
+        // add localized routes as entry pages for prerendering
+        config.prerender.routes ??= []
+        config.prerender.routes.push(...localizedEntryPages)
+      })
+    }
+
     /**
      * setup module alias
      */
diff --git a/src/pages.ts b/src/pages.ts
index eb98f4ea7..6b64f22c0 100644
--- a/src/pages.ts
+++ b/src/pages.ts
@@ -57,6 +57,13 @@ export function setupPages(options: Required<NuxtI18nOptions>, nuxt: Nuxt) {
       includeUnprefixedFallback,
       optionsResolver: getRouteOptionsResolver(ctx, options)
     })
+
+    // keep root when using prefixed routing without prerendering
+    const indexPage = pages.find(x => x.path === '/')
+    if (!nuxt.options._generate && options.strategy === 'prefix' && indexPage != null) {
+      localizedPages.unshift(indexPage)
+    }
+
     pages.splice(0, pages.length)
     pages.unshift(...(localizedPages as NuxtPage[]))
     debug('... made pages', pages)