chore(docs): Add i18n support for English and Japanese

docs/middleware.ts

@@ -0,0 +1,16 @@
+import { NextResponse } from "next/server"
+import type { NextRequest } from "next/server"
+
+export function middleware(request: NextRequest) {
+  const requestUrl = new URL(request.url)
+  return NextResponse.redirect(
+    new URL(
+      `/en${requestUrl.pathname}${requestUrl.search}${requestUrl.hash}`,
+      request.url
+    )
+  )
+}
+
+export const config = {
+  matcher: "/((?!api|_next/static|_next/image|favicon.ico|en|jp).+)",
+}

docs/next.config.js

@@ -175,6 +175,15 @@ export default withNextra({
         source: "/guides",
         destination: "/guides/debugging",
       },
+      {
+        source: "/",
+        destination: "/en",
+        permanent: true,
+      },
     ]
   },
+  i18n: {
+    locales: ["en", "ja"],
+    defaultLocale: "en",
+  },
 })

docs/theme.config.tsx

@@ -184,6 +184,10 @@ const config: DocsThemeConfig = {
   footer: {
     component: <Footer />,
   },
+  i18n: [
+    { locale: "en", name: "English" },
+    { locale: "ja", name: "日本語（ベータ）" },
+  ],
 }
 
 export default config

docs/typedoc-nextauth.cjs

@@ -91,20 +91,19 @@ function writeMetaJsFiles(app) {
         }
       })
 
-      // Rename generated 'next-auth' dir to 'nextjs'
-      if (new RegExp(".*docs/pages/reference/nextjs$").test(outputDirectory)) {
-        if (fs.existsSync("./pages/reference/nextjs")) {
-          fs.rmdirSync("./pages/reference/nextjs", { recursive: true })
-        }
-        fs.renameSync("./pages/reference/next-auth", "./pages/reference/nextjs")
-      }
-
       const metaJString = `
 export default ${JSON.stringify(pages, null, 2)}`
-      if (new RegExp(".*docs/pages/reference$").test(outputDirectory)) return
+      if (new RegExp(".*docs/pages/en/reference$").test(outputDirectory)) return
       fs.writeFileSync(path.join(outputDirectory, "_meta.js"), metaJString)
     }
 
+    // Rename generated 'next-auth' dir to 'nextjs'
+    const nextjsPath = "./pages/en/reference/nextjs"
+    if (fs.existsSync(nextjsPath)) {
+      fs.rmdirSync(nextjsPath, { recursive: true })
+    }
+    fs.renameSync("./pages/en/reference/next-auth", nextjsPath)
+
     /**
      * Recursively write _meta.js files for each page based on output.navigation
      */

docs/typedoc.config.cjs

@@ -25,7 +25,7 @@ module.exports = {
   // typedoc options
   entryPoints: [...frameworks, ...adapters],
   entryPointStrategy: "packages",
-  out: "pages/reference",
+  out: "pages/en/reference",
   tsconfig: "./tsconfig.json",
   plugin: [
     "typedoc-plugin-markdown",