Select Code to Download

foreach $key (keys %hash) {
    $ENV{$key} = $hash{$key};
}

#!/usr/bin/perl

...
}

setEnvVars(%engEnvVars);

./testScript.pl -engEnvVar APP_DIR=/usr/vendor/app/version/ -engEnvVar
+ TMP_DIR=/usr/tmp/

use strict;
%ENV = ( foo => 'bar ');
system ( 'printenv' );