Is this how variable (set $var) inheritance works?

[Maxim Dounin]

Hello!

On Fri, Feb 03, 2012 at 10:26:07PM +0700, Edho Arief wrote:

> (doesn't seem to be specified in documentation)
> 
> My test showed:
> - anything set in server { } block is inherited:
> 
> server {
>   set $something /usr/share/something;
>   ...
>   location / {
>     location /nested/ {
>       # $something is set to /usr/share/something
>       root $something;
>     }
>   }
> }
> 
> - anything set in location { } block is not inherited:
> 
> server {
>   ...
>   location /~ {
>     location ~ ^/~([^/]+)(|/.*)$ {
>       set $userfile /home/$1/public_html/$2;
>       alias $userfile;
>       location ~ \.php$ {
>         include fastcgi_params;
>         # $userfile is empty here
>         fastcgi_param SCRIPT_FILENAME $userfile;
>         fastcgi_pass 127.0.0.1:9000;
>     }
>   }
> }
> 
> 
> 
> Is it correct?

Yes, this is expected behavrious.  Rewrite module directives are 
never inherited, and directives specified inside location are only 
executed if this exact location matches.

See here for details:
http://nginx.org/en/docs/http/ngx_http_rewrite_module.html

Maxim Dounin