groups_file($file)

With this function you can read groups from INI style files.

File example:

 # servers.ini
 [webservers]
 fe01
 fe02
 [backends]
 be[01..03]

It supports the same expressions as the group command.

Since 0.42, it also supports custom host properties if the use_server_auth feature flag is enabled:

 # servers.ini
 [webservers]
 server01 user=root password=foob4r sudo=true services=apache,memcache
 # Rexfile
 use Rex -feature => ['use_server_auth'];
 task 'list_services', group => 'webservers', sub {
   say connection->server->option('services');
 }