How to properly convert .htaccess rules?

Question

Nginx

Hello, the question is of course stupid and banal, but unfortunately I did not find a working solution.
There is a .htaccess file with the following content:

Options -Indexes 

RewriteEngine on 
RewriteCond %{REQUEST_FILENAME} !-f 
RewriteCond %{REQUEST_FILENAME} !-d 
RewriteRule ^(.*)$ index.php?action=$1 [L,QSA]

With -Indexes it is clear autoindex off;
But what to do with the rest? Standard nginx + php-fpm. I can’t make the try_files rule correctly, either it doesn’t work, or it doesn’t work as intended (files that are in the root try to be processed by rewriting, even if they are loaded via a direct link)

Answer 1

1. https://nginx.org/ru/docs/http/ngx_http_rewrite_mo...
2. https://gist.github.com/carlessanagustin/9509d0d31...