#!/usr/bin/perl
use strict;
use warnings;

my $y = 'Eclipse';
my $p = 'myfile.gz';

# x will contain the line(s) that contain y
my $x = `gzgrep $y $p`;

unless ( $x ){
     print "could not find exact case, but...\n";
     $x = `gzgrep -i $y $p`;
}

if ($x) {
    print "found:\n$x\n";
}
else {
    print "nothing found\n";
}