#!/usr/bin/perl                                                                                                      
use strict;
use Data::Dumper;

my @arr = qw(comp1-cmd1-test1 comp1-cmd1-test2 comp1-cmd2-test1 comp2-cmd1-test1 comp2-cmd1-test2 comp3-cmd1-test1);


my $ret_struct;
foreach my $element (@arr)
{
    my ($comp, $cmd, $test) = split(/\-/, $element);

    push(@{$ret_struct->{$comp}{$cmd}}, $test) 
         unless(grep(/$test/, @{$ret_struct->{$comp}{$cmd}}));

    push(@{$ret_struct->{$cmd}}, $test)
        unless(grep(/$test/, @{$ret_struct->{$cmd}}));

}

print Dumper($ret_struct);