Duplicate content on [domain] path for subdomain+customDomain? about platforms HOT 2 CLOSED

Hey @zevi-wiply! There are several ways you can avoid/improve this:

1. Redirect subdomain to custom domain if exists: We actually have a section of the code that lets you do that: https://github.com/vercel/platforms/blob/main/app/%5Bdomain%5D/layout.tsx#L105-L112
2. Setting a canonical URL that points to the custom domain if it exists: https://github.com/vercel/platforms/blob/main/app/%5Bdomain%5D/layout.tsx#L50-L56

from platforms.

How about this as a "yes, and", to prevent duplicate paths ever being selected for pre-render:

const allPaths = allSites
   .flatMap(({ subdomain, customDomain }) => [
     subdomain &&
       !customDomain /*   <-----  Only include subdomains where there's no customDomain    */ && {  
         domain: `${subdomain}.${process.env.NEXT_PUBLIC_ROOT_DOMAIN}`,
       },
     customDomain && {
       domain: customDomain,
     },
   ])
   .filter(Boolean);

from platforms.