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We recently upgraded to Drupal 9.3.0 with the composer layout. Each time we execute composer update the contents of robots.txt is overlayed with the file located in core/assets/scaffold/files/robots.txt. We would like to append the default robots.txt with project unique data.

I included the following in composer.json per the documentation I found:

    "extra": {
        "drupal-scaffold": {
            "locations": {
                "web-root": "web/"
            },
            "file-mapping": {
               "[web-root]/robots.txt": {
               "append": "assets/robots.txt.append"
               }
            }
        },

I hesitate to create the file core/assets/scaffold/files/robots.txt.append as we have been trained for sometime to not change/add any files in the core/ directory. Where should robots.txt.append be placed to make this work?

1 Answer 1

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The path is relative to your project root (where composer.json lives), so in your example create a folder called /assets in the root, i.e. a sibling of /web.

If your question is more whether there's a particular path you should place it at, then the answer is: not especially. The file isn't part of the web app itself, so common sense might say don't put it in /web, but really it's up to you.

Just make sure it's placed somewhere that won't be overwritten during composer updates, and that it's included with your git commits (so not sites/default/files etc), and you'll be fine.

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  • I created the file at assets/robots.txt.append where ``assets/``` is a sibling with web/. All is working well! Thanks
    – Greg Sims
    Jan 15 at 20:11
  • 2
    You can also not scaffold it and add the robots txt module.
    – Kevin
    Jan 15 at 21:03

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