Setup

To install manually, run:

npm install astro-robots

Add the integration to your Astro config file (astro.config.*):

// @ts-check
import { defineConfig } from "astro/config";
import robots from "astro-robots"; // Add code manually

export default defineConfig({
  site: "https://example.com"; // If you want to support `@astrojs/sitemap` please provide this value
  integrations: [robots()], // Add code manually
});

After installing, run npm run build or yarn build in terminal:

npm run build

This will output robots.txt to the dist folder with default rules:

User-agent: *
Allow: /

# crawling rule(s) for above bots
Sitemap: https://example.com/sitemap-index.xml

Live Access

Start the server with npm run dev, then access the virtual robots.txt at http://localhost:4321/robots.txt.

To configure the integration, pass an object to the robots() function in your astro.config.* file:

// @ts-check
import { defineConfig } from "astro/config";
import robots from "astro-robots";

export default defineConfig({
  //...
  integrations: [
    robots({
      host: "https://example.com";,
      sitemap: [
        "https://example.com/sitemap.xml",
        "https://www.example.com/sitemap.xml",
      ],
      policy: [
        {
          userAgent: [
            "Applebot",
            "Googlebot",
            "bingbot",
            "Yandex",
            "Yeti",
            "Baiduspider",
            "360Spider",
            "*",
          ],
          allow: ["/"],
          disallow: ["/admin", "/login"],
          crawlDelay: 5,
          cleanParam: ["sid /", "s /forum/showthread"],
        },
        {
          userAgent: "BLEXBot",
          disallow: ["/assets", "/uploades/1989-08-21/*jpg$"],
        },
      ],
    }),
  ],
});

With the above configuration, the generated robots.txt file will look like this:

User-agent: Applebot
User-agent: Googlebot
User-agent: bingbot
User-agent: Yandex
User-agent: Yeti
User-agent: Baiduspider
User-agent: 360Spider
User-agent: *
Allow: /
Disallow: /admin
Disallow: /login
Crawl-delay: 5
Clean-param: sid /
Clean-param: s /forum/showthread

User-agent: BLEXBot
Disallow: /assets
Disallow: /uploades/1989-08-21/*jpg$

# crawling rule(s) for above bots
Sitemap: https://example.com/sitemap.xml
Sitemap: https://www.example.com/sitemap.xml
Host: example.com

Note: Some directives like Host, Clean-param, and Crawl-delay may not be supported by all crawlers. For example, Yandex has ignored Crawl-delay since February 2018. To control Yandex's crawl rate, use the Site crawl rate setting in Yandex Webmaster.