Please advise me on how to structure my data. It's an embarrassingly basic Perl question but my hash of hashes isn't enough to hold the data I need to handle, and I don't know how to add the missing piece. The data structure needs to look like this 
component => {
    version => "1.23.4.567",
    sources => {
        "filename1"  => "checksumfile1",
        "filename2"  => "checksumfile2",
        "filename3"  => "checksumfile3",
   }

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The data comes from a plain text file supplied in this format (no choice), one data item per line. (Filenames and checksum filenames are long URLS, so can't be conveniently placed on the same line but the source file URL line is immediately followed by the line with the URL for its checksum file): 
 component=HF
version=NULL
sourcefile=filename1
sourcesum=checksumfile1
sourcefile=filename2
sourcesum=checksumfile2
sourcefile=filename3
sourcesum=checksumfile3
component=SVM
version=10.0.70.102
sourcefile=filename4
sourcesum=checksumfile4

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My attempted code is like this: 
use strict;
use Data::Dump qw(dump);

my %HoH = ();
my $rec;
my $component;

while ( <DATA> ) {
    chomp;
    next unless m/^\S+/; 
    if( m/^component=(.*)/ ) {
        $component = $1;
        $rec = {}; 
        $HoH{$component} = $rec; 
    }
    elsif( m/^version=(.*)/ ) {
        $rec->{"version"} = $1;
    }
    else
    {
        my ($key, $value) = split /=/; 
        $rec->{$key} = $value;
    }
}    

for my $component ( keys %HoH ) {
    print "$component: ";
    for my $key ( keys %{ $HoH{$component} } ) {
         print "$key=$HoH{$component}{$key} ";
    }
    print "\n";
}

dump %HoH;

__DATA__
component=HF
version=NULL
sourcefile=filename1
sourcesum=checksum1
sourcefile=filename2
sourcesum=checksum2
sourcefile=filename3
sourcesum=checksum3
component=SVM
version=10.0.70.102
sourcefile=filename4
sourcesum=checksum4

[download]
Unfortunately (of course) the data for sources 1 and 2 is overwritten by source 3, so I think I need an array of source hashes, but I can't figure out how to code it thus this plea for help, kind monks.

In reply to how to include an array of hashes in a hash of hashes? by anadem

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