Rexfile

use Rex -feature => [ '1.4', 'exec_autodie' ];

user 'myuser';

environment production => sub {
    group destination => 'server1';
};

environment staging => sub {
    group destination => 'server2';
};

no_ssh task 'a', sub {
    where_am_i();
};

task 'b',
  group => 'destination',
  sub {
    where_am_i();

    LOCAL {
        where_am_i();
    };
  };

batch 'deploy' => qw(a b);

sub where_am_i {
    say run 'hostname';
}