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    require YAML::Syck;
    $YAML::Syck::SortKeys = $YAML::Syck::SortKeys = 1;
    $YAML::Syck::Headless = $YAML::Syck::Headless = 1;
    $dump = \&YAML::Syck::Dump;
  };

  if ($@) {
    die "Couldn't load YAML dumper module: $@";
  }

  local $\ = undef;
  if (@$requested) {
    for my $f (sort @$requested) {
      print $dump->({ $f => $facts->{$f} });
    }
  } else {
    print $dump->($facts);
  }
}

#-----------------------------------------------------------------------------

=head1 NAME

pffacter - collect facts about operating system

=head1 SYNOPSIS

  pffacter [--modules=/module/dir] [--yaml] [facts ...]

  pffacter --help

=head1 DESCRIPTION

This is a command line interface for module L<Sys::Facter(3)>. It collects
information (facts) about host operating system and prints them to STDOUT.

By default, all facts available are printed in form that mimics Puppet's
Facter output. You may also specify which facts are to be printed, what will
make run a bit faster and output a bit more terse.

If you specify a single fact to be printed, fact name will be skipped in
output, so you'll get just a fact's content. If you specify more than one
fact, please use I<--yaml> option to make an output machine-readable.

If you have own Pfacter modules that you want to load, you can point the
directory containing them with option I<--modules>. You may specify this
option multiple times.

=head1 USAGE EXAMPLES

Get a single fact:

  $ pffacter operatingsystem
  Debian

Get few facts:

  $ pffacter kernel hostname domain
  kernel => Linux
  hostname => desktop01
  domain => example.net

Get few facts as YAML:

  $ pffacter --yaml kernel hostname kernelrelease fqdn lsbid
  fqdn: desktop01.example.net
  hostname: desktop01
  kernel: Linux
  kernelrelease: 2.6.32-5-686
  lsbid: Debian

=head1 SEE ALSO

L<Sys::Facter(3)>

=cut

# vim:ft=perl