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

our @kind = (
    { cmd => 'sha1sum'  , name => 'Checksums-Sha1'   },
    { cmd => 'sha256sum', name => 'Checksums-Sha256' },
    { cmd => 'md5sum'   , name => 'Files' },
);

@ARGV == 1 or die "usage: $0 [DSC-FILE]\n";

my $dsc = shift @ARGV;
open my $dscfh, '<', $dsc;
chdir $1 if $dsc =~ m%^(.*/).*?$%;

while (<$dscfh>) {
    last if /^Files:/;
    print;
}

my @filename;
while (<$dscfh>) {
    /\S/ or last;
    my ($sum, $size, $filename) = /(\S+)\s*(\S+)\s*(\S+)/;
    push @filename, $filename;
}

close $dscfh;

for my $kind (@kind) {
    print "$kind->{name}:\n";
    for my $filename (@filename) {
        my $sumout = `$kind->{cmd} $filename`;
        my ($sum, $fn) = $sumout =~ /(\S+)\s*(\S+)/;
        my @stat = stat $fn;
        print " $sum $stat[7] $fn\n";
    }
}
print "\n";
