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#!/usr/bin/env perl

...
close $in_fh;

print Dumper \@out;

$ cat pm_1054339_data.txt
component=HF
...
sourcesum=checksum2
sourcefile=file3
sourcesum=checksum3

$ pm_1054339_data.pl
$VAR1 = [
...
            'component' => 'HF_2'
          }
        ];