Opting out from Vercel ISR not working for paths with rest parameters

[hrabiel]

Astro Info

Astro                    v4.15.2
Node                     v20.16.0
System                   macOS (arm64)
Package Manager          npm
Output                   server
Adapter                  @astrojs/vercel/serverless
Integrations             none

Describe the Bug

According to the documentation, Vercel adapter allows to exclude specific paths from caching with ISR. This works correctly for static and dynamic routes with a parameter, but doesn't work with the routes that include rest parameters.

Example:

import vercel from '@astrojs/vercel/serverless';
import { defineConfig } from 'astro/config';

// https://astro.build/config
export default defineConfig({
  output: 'server',
  adapter: vercel({
    isr: {
      exclude: [
        "/one", // works
        "/excluded/[slug]", // works
        "/excluded/[...rest]", // doesn't work, it's not excluded
      ]
    }
  })
});

What's the expected result?

All routes added to the isr.excluded Vercel adapter config should be excluded from caching, including those with rest parameters.

Link to Minimal Reproducible Example

https://github.com/hrabiel/astro-vercel-adapter-demo

Participation

• I am willing to submit a pull request for this issue.

[hrabiel]

The issue seems to be caused by the incorrect generation of a route with rest parameters. It puts an extra slash in the src regex.
Expected: "^/excluded(?:\\/(.*?))?$"
Actual: "^/excluded/(?:\\/(.*?))?$"

Opened a PR with the fix for this: #373