Have you looked into Text::Diff?

Adapted from the documentation sample: 


use strict;
use warnings;

use Text::Diff;
my $diff = diff "file1.txt", "file2.txt", { STYLE => "Context" };

print "$diff\n";

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In reply to Re: building an ldif from 2 files by tokpela
in thread building an ldif from 2 files by rfransix

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