Arbitrarily slicing $server_name into subdomains?

[Igor Clark]

Hi there, hope all are well!

I'd like to match a wildcard DNS name, pointing to an nginx virtual
host, such that an arbitrary level of subdomains maps to an arbitrary
level of directories, in a manner I specify.

For example:

    url: http://client.myserver.net/
    root: /var/www/docs/myserver.net/client/public

    url: http://project.client.myserver.net/
    root: /var/www/docs/myserver.net/client/project/public

    url: http://sub.project.client.myserver.net/
    root: /var/www/docs/myserver.net/client/project/sub/public

(etc.)

It's straightforward to do this for a fixed level of
subdomains/directories using a server_name regex, for example:

        server_name    ~^(.*)\.(.*)\.myserver\.net$;
        set    $my_host $2/$1;
        root    /var/www/docs/myserver.net/$my_host/public

which gives me project.client.myserver.net ->
.../myserver.net/client/project/... - but the whole point of using
wildcards like this is that I don't want to keep adding new configs.

Is it possible to do this, perhaps using the perl config module? Or
maybe just a smarter regex?

Very grateful for any suggestions.

Thanks,
Igor Clark
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